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xuu 2023-07-12 12:43:25 -06:00
commit 80dbf39736
Signed by: xuu
GPG Key ID: C63E6D61F3035024
34 changed files with 3664 additions and 0 deletions
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131
authreq/authreq.go Normal file
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package authreq
import (
"bytes"
"context"
"crypto/ed25519"
"encoding/base64"
"fmt"
"hash/fnv"
"io"
"net/http"
"strings"
"time"
"github.com/golang-jwt/jwt/v4"
)
var SignatureLifetime = 30 * time.Minute
var AuthHeader = "Authorization"
func Sign(req *http.Request, key ed25519.PrivateKey) (*http.Request, error) {
pub := enc([]byte(key.Public().(ed25519.PublicKey)))
h := fnv.New128a()
fmt.Fprint(h, req.Method, req.URL.String())
if req.Body != nil {
b := &bytes.Buffer{}
w := io.MultiWriter(h, b)
_, err := io.Copy(w, req.Body)
if err != nil {
return req, err
}
req.Body = io.NopCloser(b)
}
token := jwt.NewWithClaims(jwt.SigningMethodEdDSA, jwt.RegisteredClaims{
Subject: enc(h.Sum(nil)),
ExpiresAt: jwt.NewNumericDate(time.Now().Add(SignatureLifetime)),
IssuedAt: jwt.NewNumericDate(time.Now()),
Issuer: pub,
})
sig, err := token.SignedString(key)
if err != nil {
return req, err
}
req.Header.Set(AuthHeader, sig)
return req, nil
}
func Authorization(hdlr http.Handler) http.Handler {
return http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
auth := req.Header.Get(AuthHeader)
if auth == "" {
rw.WriteHeader(http.StatusUnauthorized)
return
}
h := fnv.New128a()
fmt.Fprint(h, req.Method, req.URL.String())
if req.Body != nil {
b := &bytes.Buffer{}
w := io.MultiWriter(h, b)
_, err := io.Copy(w, req.Body)
if err != nil {
rw.WriteHeader(http.StatusBadRequest)
}
}
subject := enc(h.Sum(nil))
token, err := jwt.ParseWithClaims(
string(auth),
&jwt.RegisteredClaims{},
func(tok *jwt.Token) (any, error) {
c, ok := tok.Claims.(*jwt.RegisteredClaims)
if !ok {
return nil, fmt.Errorf("wrong type of claim")
}
pub, err := dec(c.Issuer)
return ed25519.PublicKey(pub), err
},
jwt.WithValidMethods([]string{jwt.SigningMethodEdDSA.Alg()}),
jwt.WithJSONNumber(),
)
if err != nil {
rw.WriteHeader(http.StatusBadRequest)
return
}
c, ok := token.Claims.(*jwt.RegisteredClaims)
if !ok {
rw.WriteHeader(http.StatusUnprocessableEntity)
return
}
req = req.WithContext(context.WithValue(req.Context(), contextKey, c))
if c.Subject != subject {
rw.WriteHeader(http.StatusForbidden)
return
}
hdlr.ServeHTTP(rw, req)
})
}
func enc(b []byte) string {
return base64.RawURLEncoding.EncodeToString(b)
}
func dec(s string) ([]byte, error) {
s = strings.TrimSpace(s)
return base64.RawURLEncoding.DecodeString(s)
}
var contextKey = struct{ name string }{"jwtClaim"}
func FromContext(ctx context.Context) *jwt.RegisteredClaims {
if v := ctx.Value(contextKey); v != nil {
if c, ok := v.(*jwt.RegisteredClaims); ok {
return c
}
}
return nil
}

104
authreq/authreq_test.go Normal file
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package authreq_test
import (
"crypto/ed25519"
"encoding/base64"
"io"
"net/http"
"net/http/httptest"
"strings"
"testing"
"github.com/matryer/is"
"go.sour.is/pkg/authreq"
)
func TestGETRequest(t *testing.T) {
is := is.New(t)
pub, priv, err := ed25519.GenerateKey(nil)
is.NoErr(err)
req, err := http.NewRequest(http.MethodGet, "http://example.com/"+enc(pub)+"/test?q=test", nil)
is.NoErr(err)
req, err = authreq.Sign(req, priv)
is.NoErr(err)
t.Log(enc(pub))
t.Log(req.Header.Get(authreq.AuthHeader))
var hdlr http.Handler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
c := authreq.FromContext(r.Context())
if c == nil {
w.WriteHeader(http.StatusInternalServerError)
return
}
if !strings.Contains(req.URL.Path, c.Issuer) {
w.WriteHeader(http.StatusForbidden)
return
}
})
hdlr = authreq.Authorization(hdlr)
rw := httptest.NewRecorder()
hdlr.ServeHTTP(rw, req)
is.Equal(rw.Code, http.StatusOK)
}
func TestPOSTRequest(t *testing.T) {
is := is.New(t)
content := "this is post!"
pub, priv, err := ed25519.GenerateKey(nil)
is.NoErr(err)
req, err := http.NewRequest(http.MethodPost, "http://example.com/"+enc(pub)+"/test?q=test", strings.NewReader(content))
is.NoErr(err)
req, err = authreq.Sign(req, priv)
is.NoErr(err)
t.Log(enc(pub))
t.Log(req.Header.Get(authreq.AuthHeader))
var hdlr http.Handler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
c := authreq.FromContext(r.Context())
if c == nil {
w.WriteHeader(http.StatusInternalServerError)
return
}
contentCheck, err := io.ReadAll(r.Body)
r.Body.Close()
if err != nil {
w.WriteHeader(http.StatusBadRequest)
return
}
t.Log(string(contentCheck))
if !strings.Contains(req.URL.Path, c.Issuer) {
w.WriteHeader(http.StatusForbidden)
return
}
})
hdlr = authreq.Authorization(hdlr)
rw := httptest.NewRecorder()
hdlr.ServeHTTP(rw, req)
is.Equal(rw.Code, http.StatusOK)
}
func enc(b []byte) string {
return base64.RawURLEncoding.EncodeToString(b)
}

238
cache/cache.go vendored Normal file
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package cache
import (
"context"
"sync"
)
const (
// DefaultEvictedBufferSize defines the default buffer size to store evicted key/val
DefaultEvictedBufferSize = 16
)
// Cache is a thread-safe fixed size LRU cache.
type Cache[K comparable, V any] struct {
lru *LRU[K, V]
evictedKeys []K
evictedVals []V
onEvictedCB func(ctx context.Context, k K, v V)
lock sync.RWMutex
}
// New creates an LRU of the given size.
func NewCache[K comparable, V any](size int) (*Cache[K, V], error) {
return NewWithEvict[K, V](size, nil)
}
// NewWithEvict constructs a fixed size cache with the given eviction
// callback.
func NewWithEvict[K comparable, V any](size int, onEvicted func(context.Context, K, V)) (c *Cache[K, V], err error) {
// create a cache with default settings
c = &Cache[K, V]{
onEvictedCB: onEvicted,
}
if onEvicted != nil {
c.initEvictBuffers()
onEvicted = c.onEvicted
}
c.lru, err = NewLRU(size, onEvicted)
return
}
func (c *Cache[K, V]) initEvictBuffers() {
c.evictedKeys = make([]K, 0, DefaultEvictedBufferSize)
c.evictedVals = make([]V, 0, DefaultEvictedBufferSize)
}
// onEvicted save evicted key/val and sent in externally registered callback
// outside of critical section
func (c *Cache[K, V]) onEvicted(ctx context.Context, k K, v V) {
c.evictedKeys = append(c.evictedKeys, k)
c.evictedVals = append(c.evictedVals, v)
}
// Purge is used to completely clear the cache.
func (c *Cache[K, V]) Purge(ctx context.Context) {
var ks []K
var vs []V
c.lock.Lock()
c.lru.Purge(ctx)
if c.onEvictedCB != nil && len(c.evictedKeys) > 0 {
ks, vs = c.evictedKeys, c.evictedVals
c.initEvictBuffers()
}
c.lock.Unlock()
// invoke callback outside of critical section
if c.onEvictedCB != nil {
for i := 0; i < len(ks); i++ {
c.onEvictedCB(ctx, ks[i], vs[i])
}
}
}
// Add adds a value to the cache. Returns true if an eviction occurred.
func (c *Cache[K, V]) Add(ctx context.Context, key K, value V) (evicted bool) {
var k K
var v V
c.lock.Lock()
evicted = c.lru.Add(ctx, key, value)
if c.onEvictedCB != nil && evicted {
k, v = c.evictedKeys[0], c.evictedVals[0]
c.evictedKeys, c.evictedVals = c.evictedKeys[:0], c.evictedVals[:0]
}
c.lock.Unlock()
if c.onEvictedCB != nil && evicted {
c.onEvictedCB(ctx, k, v)
}
return
}
// Get looks up a key's value from the cache.
func (c *Cache[K, V]) Get(key K) (value *V, ok bool) {
c.lock.Lock()
value, ok = c.lru.Get(key)
c.lock.Unlock()
return value, ok
}
// Contains checks if a key is in the cache, without updating the
// recent-ness or deleting it for being stale.
func (c *Cache[K, V]) Contains(key K) bool {
c.lock.RLock()
containKey := c.lru.Contains(key)
c.lock.RUnlock()
return containKey
}
// Peek returns the key value (or undefined if not found) without updating
// the "recently used"-ness of the key.
func (c *Cache[K, V]) Peek(key K) (value *V, ok bool) {
c.lock.RLock()
value, ok = c.lru.Peek(key)
c.lock.RUnlock()
return value, ok
}
// ContainsOrAdd checks if a key is in the cache without updating the
// recent-ness or deleting it for being stale, and if not, adds the value.
// Returns whether found and whether an eviction occurred.
func (c *Cache[K, V]) ContainsOrAdd(ctx context.Context, key K, value V) (ok, evicted bool) {
var k K
var v V
c.lock.Lock()
if c.lru.Contains(key) {
c.lock.Unlock()
return true, false
}
evicted = c.lru.Add(ctx, key, value)
if c.onEvictedCB != nil && evicted {
k, v = c.evictedKeys[0], c.evictedVals[0]
c.evictedKeys, c.evictedVals = c.evictedKeys[:0], c.evictedVals[:0]
}
c.lock.Unlock()
if c.onEvictedCB != nil && evicted {
c.onEvictedCB(ctx, k, v)
}
return false, evicted
}
// PeekOrAdd checks if a key is in the cache without updating the
// recent-ness or deleting it for being stale, and if not, adds the value.
// Returns whether found and whether an eviction occurred.
func (c *Cache[K, V]) PeekOrAdd(ctx context.Context, key K, value V) (previous *V, ok, evicted bool) {
var k K
var v V
c.lock.Lock()
previous, ok = c.lru.Peek(key)
if ok {
c.lock.Unlock()
return previous, true, false
}
evicted = c.lru.Add(ctx, key, value)
if c.onEvictedCB != nil && evicted {
k, v = c.evictedKeys[0], c.evictedVals[0]
c.evictedKeys, c.evictedVals = c.evictedKeys[:0], c.evictedVals[:0]
}
c.lock.Unlock()
if c.onEvictedCB != nil && evicted {
c.onEvictedCB(ctx, k, v)
}
return nil, false, evicted
}
// Remove removes the provided key from the cache.
func (c *Cache[K, V]) Remove(ctx context.Context, key K) (present bool) {
var k K
var v V
c.lock.Lock()
present = c.lru.Remove(ctx, key)
if c.onEvictedCB != nil && present {
k, v = c.evictedKeys[0], c.evictedVals[0]
c.evictedKeys, c.evictedVals = c.evictedKeys[:0], c.evictedVals[:0]
}
c.lock.Unlock()
if c.onEvictedCB != nil && present {
c.onEvicted(ctx, k, v)
}
return
}
// Resize changes the cache size.
func (c *Cache[K, V]) Resize(ctx context.Context, size int) (evicted int) {
var ks []K
var vs []V
c.lock.Lock()
evicted = c.lru.Resize(ctx, size)
if c.onEvictedCB != nil && evicted > 0 {
ks, vs = c.evictedKeys, c.evictedVals
c.initEvictBuffers()
}
c.lock.Unlock()
if c.onEvictedCB != nil && evicted > 0 {
for i := 0; i < len(ks); i++ {
c.onEvictedCB(ctx, ks[i], vs[i])
}
}
return evicted
}
// RemoveOldest removes the oldest item from the cache.
func (c *Cache[K, V]) RemoveOldest(ctx context.Context) (key *K, value *V, ok bool) {
var k K
var v V
c.lock.Lock()
key, value, ok = c.lru.RemoveOldest(ctx)
if c.onEvictedCB != nil && ok {
k, v = c.evictedKeys[0], c.evictedVals[0]
c.evictedKeys, c.evictedVals = c.evictedKeys[:0], c.evictedVals[:0]
}
c.lock.Unlock()
if c.onEvictedCB != nil && ok {
c.onEvictedCB(ctx, k, v)
}
return
}
// GetOldest returns the oldest entry
func (c *Cache[K, V]) GetOldest() (key *K, value *V, ok bool) {
c.lock.RLock()
key, value, ok = c.lru.GetOldest()
c.lock.RUnlock()
return
}
// Keys returns a slice of the keys in the cache, from oldest to newest.
func (c *Cache[K, V]) Keys() []K {
c.lock.RLock()
keys := c.lru.Keys()
c.lock.RUnlock()
return keys
}
// Len returns the number of items in the cache.
func (c *Cache[K, V]) Len() int {
c.lock.RLock()
length := c.lru.Len()
c.lock.RUnlock()
return length
}

131
cache/cache_test.go vendored Normal file
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package cache_test
import (
"context"
"testing"
"github.com/matryer/is"
"go.sour.is/pkg/cache"
)
func TestCache(t *testing.T) {
is := is.New(t)
ctx := context.Background()
c, err := cache.NewCache[string, int](1)
is.NoErr(err)
evicted := c.Add(ctx, "one", 1)
is.True(!evicted)
is.True(c.Contains("one"))
_, ok := c.Peek("one")
is.True(ok)
ok, evicted = c.ContainsOrAdd(ctx, "two", 2)
is.True(!ok)
is.True(evicted)
is.True(!c.Contains("one"))
is.True(c.Contains("two"))
is.Equal(c.Len(), 1)
is.Equal(c.Keys(), []string{"two"})
v, ok := c.Get("two")
is.True(ok)
is.Equal(*v, 2)
evictCount := c.Resize(ctx, 100)
is.True(evictCount == 0)
c.Add(ctx, "one", 1)
prev, ok, evicted := c.PeekOrAdd(ctx, "three", 3)
is.True(!ok)
is.True(!evicted)
is.Equal(prev, nil)
key, value, ok := c.GetOldest()
is.True(ok)
is.Equal(*key, "two")
is.Equal(*value, 2)
key, value, ok = c.RemoveOldest(ctx)
is.True(ok)
is.Equal(*key, "two")
is.Equal(*value, 2)
c.Remove(ctx, "one")
c.Purge(ctx)
is.True(!c.Contains("three"))
}
func TestCacheWithEvict(t *testing.T) {
is := is.New(t)
ctx := context.Background()
evictions := 0
c, err := cache.NewWithEvict(1, func(ctx context.Context, s string, i int) { evictions++ })
is.NoErr(err)
key, value, ok := c.GetOldest()
is.True(!ok)
is.Equal(key, nil)
is.Equal(value, nil)
key, value, ok = c.RemoveOldest(ctx)
is.True(!ok)
is.Equal(key, nil)
is.Equal(value, nil)
evicted := c.Add(ctx, "one", 1)
is.True(!evicted)
is.True(c.Contains("one"))
_, ok = c.Peek("one")
is.True(ok)
ok, evicted = c.ContainsOrAdd(ctx, "two", 2)
is.True(!ok)
is.True(evicted)
is.True(!c.Contains("one"))
is.True(c.Contains("two"))
is.Equal(c.Len(), 1)
is.Equal(c.Keys(), []string{"two"})
v, ok := c.Get("two")
is.True(ok)
is.Equal(*v, 2)
evictCount := c.Resize(ctx, 100)
is.True(evictCount == 0)
c.Add(ctx, "one", 1)
prev, ok, evicted := c.PeekOrAdd(ctx, "three", 3)
is.True(!ok)
is.True(!evicted)
is.Equal(prev, nil)
key, value, ok = c.GetOldest()
is.True(ok)
is.Equal(*key, "two")
is.Equal(*value, 2)
key, value, ok = c.RemoveOldest(ctx)
is.True(ok)
is.Equal(*key, "two")
is.Equal(*value, 2)
c.Resize(ctx, 1)
c.Purge(ctx)
is.True(!c.Contains("three"))
is.Equal(evictions, 4)
}

235
cache/list.go vendored Normal file
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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package list implements a doubly linked list.
//
// To iterate over a list (where l is a *List):
//
// for e := l.Front(); e != nil; e = e.Next() {
// // do something with e.Value
// }
package cache
// Element is an element of a linked list.
type Element[V any] struct {
// Next and previous pointers in the doubly-linked list of elements.
// To simplify the implementation, internally a list l is implemented
// as a ring, such that &l.root is both the next element of the last
// list element (l.Back()) and the previous element of the first list
// element (l.Front()).
next, prev *Element[V]
// The list to which this element belongs.
list *List[V]
// The value stored with this element.
Value V
}
// Next returns the next list element or nil.
func (e *Element[V]) Next() *Element[V] {
if p := e.next; e.list != nil && p != &e.list.root {
return p
}
return nil
}
// Prev returns the previous list element or nil.
func (e *Element[V]) Prev() *Element[V] {
if p := e.prev; e.list != nil && p != &e.list.root {
return p
}
return nil
}
// List represents a doubly linked list.
// The zero value for List is an empty list ready to use.
type List[V any] struct {
root Element[V] // sentinel list element, only &root, root.prev, and root.next are used
len int // current list length excluding (this) sentinel element
}
// Init initializes or clears list l.
func (l *List[V]) Init() *List[V] {
l.root.next = &l.root
l.root.prev = &l.root
l.len = 0
return l
}
// NewList returns an initialized list.
func NewList[V any]() *List[V] { return new(List[V]).Init() }
// Len returns the number of elements of list l.
// The complexity is O(1).
func (l *List[V]) Len() int { return l.len }
// Front returns the first element of list l or nil if the list is empty.
func (l *List[V]) Front() *Element[V] {
if l.len == 0 {
return nil
}
return l.root.next
}
// Back returns the last element of list l or nil if the list is empty.
func (l *List[V]) Back() *Element[V] {
if l.len == 0 {
return nil
}
return l.root.prev
}
// lazyInit lazily initializes a zero List value.
func (l *List[V]) lazyInit() {
if l.root.next == nil {
l.Init()
}
}
// insert inserts e after at, increments l.len, and returns e.
func (l *List[V]) insert(e, at *Element[V]) *Element[V] {
e.prev = at
e.next = at.next
e.prev.next = e
e.next.prev = e
e.list = l
l.len++
return e
}
// insertValue is a convenience wrapper for insert(&Element{Value: v}, at).
func (l *List[V]) insertValue(v V, at *Element[V]) *Element[V] {
return l.insert(&Element[V]{Value: v}, at)
}
// remove removes e from its list, decrements l.len
func (l *List[V]) remove(e *Element[V]) {
e.prev.next = e.next
e.next.prev = e.prev
e.next = nil // avoid memory leaks
e.prev = nil // avoid memory leaks
e.list = nil
l.len--
}
// move moves e to next to at.
func (l *List[V]) move(e, at *Element[V]) {
if e == at {
return
}
e.prev.next = e.next
e.next.prev = e.prev
e.prev = at
e.next = at.next
e.prev.next = e
e.next.prev = e
}
// Remove removes e from l if e is an element of list l.
// It returns the element value e.Value.
// The element must not be nil.
func (l *List[V]) Remove(e *Element[V]) any {
if e.list == l {
// if e.list == l, l must have been initialized when e was inserted
// in l or l == nil (e is a zero Element) and l.remove will crash
l.remove(e)
}
return e.Value
}
// PushFront inserts a new element e with value v at the front of list l and returns e.
func (l *List[V]) PushFront(v V) *Element[V] {
l.lazyInit()
return l.insertValue(v, &l.root)
}
// PushBack inserts a new element e with value v at the back of list l and returns e.
func (l *List[V]) PushBack(v V) *Element[V] {
l.lazyInit()
return l.insertValue(v, l.root.prev)
}
// InsertBefore inserts a new element e with value v immediately before mark and returns e.
// If mark is not an element of l, the list is not modified.
// The mark must not be nil.
func (l *List[V]) InsertBefore(v V, mark *Element[V]) *Element[V] {
if mark.list != l {
return nil
}
// see comment in List.Remove about initialization of l
return l.insertValue(v, mark.prev)
}
// InsertAfter inserts a new element e with value v immediately after mark and returns e.
// If mark is not an element of l, the list is not modified.
// The mark must not be nil.
func (l *List[V]) InsertAfter(v V, mark *Element[V]) *Element[V] {
if mark.list != l {
return nil
}
// see comment in List.Remove about initialization of l
return l.insertValue(v, mark)
}
// MoveToFront moves element e to the front of list l.
// If e is not an element of l, the list is not modified.
// The element must not be nil.
func (l *List[V]) MoveToFront(e *Element[V]) {
if e.list != l || l.root.next == e {
return
}
// see comment in List.Remove about initialization of l
l.move(e, &l.root)
}
// MoveToBack moves element e to the back of list l.
// If e is not an element of l, the list is not modified.
// The element must not be nil.
func (l *List[V]) MoveToBack(e *Element[V]) {
if e.list != l || l.root.prev == e {
return
}
// see comment in List.Remove about initialization of l
l.move(e, l.root.prev)
}
// MoveBefore moves element e to its new position before mark.
// If e or mark is not an element of l, or e == mark, the list is not modified.
// The element and mark must not be nil.
func (l *List[V]) MoveBefore(e, mark *Element[V]) {
if e.list != l || e == mark || mark.list != l {
return
}
l.move(e, mark.prev)
}
// MoveAfter moves element e to its new position after mark.
// If e or mark is not an element of l, or e == mark, the list is not modified.
// The element and mark must not be nil.
func (l *List[V]) MoveAfter(e, mark *Element[V]) {
if e.list != l || e == mark || mark.list != l {
return
}
l.move(e, mark)
}
// PushBackList inserts a copy of another list at the back of list l.
// The lists l and other may be the same. They must not be nil.
func (l *List[V]) PushBackList(other *List[V]) {
l.lazyInit()
for i, e := other.Len(), other.Front(); i > 0; i, e = i-1, e.Next() {
l.insertValue(e.Value, l.root.prev)
}
}
// PushFrontList inserts a copy of another list at the front of list l.
// The lists l and other may be the same. They must not be nil.
func (l *List[V]) PushFrontList(other *List[V]) {
l.lazyInit()
for i, e := other.Len(), other.Back(); i > 0; i, e = i-1, e.Prev() {
l.insertValue(e.Value, &l.root)
}
}

175
cache/lru.go vendored Normal file
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@ -0,0 +1,175 @@
package cache
import (
"context"
"errors"
)
// EvictCallback is used to get a callback when a cache entry is evicted
type EvictCallback[K comparable, V any] func(context.Context, K, V)
// LRU implements a non-thread safe fixed size LRU cache
type LRU[K comparable, V any] struct {
size int
evictList *List[entry[K, V]]
items map[K]*Element[entry[K, V]]
onEvict EvictCallback[K, V]
}
// entry is used to hold a value in the evictList
type entry[K comparable, V any] struct {
key K
value V
}
// NewLRU constructs an LRU of the given size
func NewLRU[K comparable, V any](size int, onEvict EvictCallback[K, V]) (*LRU[K, V], error) {
if size <= 0 {
return nil, errors.New("must provide a positive size")
}
c := &LRU[K, V]{
size: size,
evictList: NewList[entry[K, V]](),
items: make(map[K]*Element[entry[K, V]]),
onEvict: onEvict,
}
return c, nil
}
// Purge is used to completely clear the cache.
func (c *LRU[K, V]) Purge(ctx context.Context) {
for k, v := range c.items {
if c.onEvict != nil {
c.onEvict(ctx, k, v.Value.value)
}
delete(c.items, k)
}
c.evictList.Init()
}
// Add adds a value to the cache. Returns true if an eviction occurred.
func (c *LRU[K, V]) Add(ctx context.Context, key K, value V) (evicted bool) {
// Check for existing item
if ent, ok := c.items[key]; ok {
c.evictList.MoveToFront(ent)
ent.Value.value = value
return false
}
// Add new item
entry := c.evictList.PushFront(entry[K, V]{key, value})
c.items[key] = entry
evict := c.evictList.Len() > c.size
// Verify size not exceeded
if evict {
c.removeOldest(ctx)
}
return evict
}
// Get looks up a key's value from the cache.
func (c *LRU[K, V]) Get(key K) (value *V, ok bool) {
if ent, ok := c.items[key]; ok {
c.evictList.MoveToFront(ent)
if ent == nil {
return nil, false
}
return &ent.Value.value, true
}
return
}
// Contains checks if a key is in the cache, without updating the recent-ness
// or deleting it for being stale.
func (c *LRU[K, V]) Contains(key K) (ok bool) {
_, ok = c.items[key]
return ok
}
// Peek returns the key value (or undefined if not found) without updating
// the "recently used"-ness of the key.
func (c *LRU[K, V]) Peek(key K) (value *V, ok bool) {
if ent, ok := c.items[key]; ok {
return &ent.Value.value, true
}
return nil, false
}
// Remove removes the provided key from the cache, returning if the
// key was contained.
func (c *LRU[K, V]) Remove(ctx context.Context, key K) (present bool) {
if ent, ok := c.items[key]; ok {
c.removeElement(ctx, ent)
return true
}
return false
}
// RemoveOldest removes the oldest item from the cache.
func (c *LRU[K, V]) RemoveOldest(ctx context.Context) (key *K, value *V, ok bool) {
ent := c.evictList.Back()
if ent != nil {
c.removeElement(ctx, ent)
kv := ent.Value
return &kv.key, &kv.value, true
}
return nil, nil, false
}
// GetOldest returns the oldest entry
func (c *LRU[K, V]) GetOldest() (key *K, value *V, ok bool) {
ent := c.evictList.Back()
if ent != nil {
kv := ent.Value
return &kv.key, &kv.value, true
}
return nil, nil, false
}
// Keys returns a slice of the keys in the cache, from oldest to newest.
func (c *LRU[K, V]) Keys() []K {
keys := make([]K, len(c.items))
i := 0
for ent := c.evictList.Back(); ent != nil; ent = ent.Prev() {
keys[i] = ent.Value.key
i++
}
return keys
}
// Len returns the number of items in the cache.
func (c *LRU[K, V]) Len() int {
return c.evictList.Len()
}
// Resize changes the cache size.
func (c *LRU[K, V]) Resize(ctx context.Context, size int) (evicted int) {
diff := c.Len() - size
if diff < 0 {
diff = 0
}
for i := 0; i < diff; i++ {
c.removeOldest(ctx)
}
c.size = size
return diff
}
// removeOldest removes the oldest item from the cache.
func (c *LRU[K, V]) removeOldest(ctx context.Context) {
ent := c.evictList.Back()
if ent != nil {
c.removeElement(ctx, ent)
}
}
// removeElement is used to remove a given list element from the cache
func (c *LRU[K, V]) removeElement(ctx context.Context, e *Element[entry[K, V]]) {
c.evictList.Remove(e)
kv := e.Value
delete(c.items, kv.key)
if c.onEvict != nil {
c.onEvict(ctx, kv.key, kv.value)
}
}

161
cron/cron.go Normal file
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@ -0,0 +1,161 @@
package cron
import (
"context"
"fmt"
"math/rand"
"strconv"
"strings"
"time"
"go.opentelemetry.io/otel/attribute"
"golang.org/x/sync/errgroup"
"go.sour.is/pkg/lg"
"go.sour.is/pkg/locker"
"go.sour.is/pkg/set"
)
type task func(context.Context, time.Time) error
type job struct {
Month, Weekday, Day,
Hour, Minute, Second *set.BoundSet[int8]
Task task
}
var DefaultGranularity = time.Minute
type state struct {
queue []task
}
type cron struct {
jobs []job
state *locker.Locked[state]
granularity time.Duration
}
func New(granularity time.Duration) *cron {
return &cron{granularity: granularity, state: locker.New(&state{})}
}
func parseInto(c string, s *set.BoundSet[int8]) *set.BoundSet[int8] {
if c == "*" || c == "" {
s.AddRange(0, 100)
}
for _, split := range strings.Split(c, ",") {
minmax := strings.SplitN(split, "-", 2)
switch len(minmax) {
case 2:
min, _ := strconv.ParseInt(minmax[0], 10, 8)
max, _ := strconv.ParseInt(minmax[1], 10, 8)
s.AddRange(int8(min), int8(max))
default:
min, _ := strconv.ParseInt(minmax[0], 10, 8)
s.Add(int8(min))
}
}
return s
}
// This function creates a new job that occurs at the given day and the given
// 24hour time. Any of the values may be -1 as an "any" match, so passing in
// a day of -1, the event occurs every day; passing in a second value of -1, the
// event will fire every second that the other parameters match.
func (c *cron) NewCron(expr string, task func(context.Context, time.Time) error) {
sp := append(strings.Fields(expr), make([]string, 5)...)[:5]
job := job{
Month: parseInto(sp[4], set.NewBoundSet[int8](1, 12)),
Weekday: parseInto(sp[3], set.NewBoundSet[int8](0, 6)),
Day: parseInto(sp[2], set.NewBoundSet[int8](1, 31)),
Hour: parseInto(sp[1], set.NewBoundSet[int8](0, 23)),
Minute: parseInto(sp[0], set.NewBoundSet[int8](0, 59)),
Task: task,
}
c.jobs = append(c.jobs, job)
}
func (c *cron) RunOnce(ctx context.Context, once func(context.Context, time.Time) error) {
c.state.Use(ctx, func(ctx context.Context, state *state) error {
state.queue = append(state.queue, once)
return nil
})
}
func (cj job) Matches(t time.Time) (ok bool) {
return cj.Month.Has(int8(t.Month())) &&
cj.Day.Has(int8(t.Day())) &&
cj.Weekday.Has(int8(t.Weekday()%7)) &&
cj.Hour.Has(int8(t.Hour())) &&
cj.Minute.Has(int8(t.Minute()))
}
func (cj job) String() string {
return fmt.Sprintf("job[\n m:%s\n h:%s\n d:%s\n w:%s\n M:%s\n]", cj.Minute, cj.Hour, cj.Day, cj.Weekday, cj.Month)
}
func (c *cron) Run(ctx context.Context) error {
tick := time.NewTicker(c.granularity)
defer tick.Stop()
go c.run(ctx, time.Now())
for {
select {
case <-ctx.Done():
return nil
case now := <-tick.C:
// fmt.Println(now.Second(), now.Hour(), now.Day(), int8(now.Weekday()), uint8(now.Month()))
go c.run(ctx, now)
}
}
}
func (c *cron) run(ctx context.Context, now time.Time) {
var run []task
ctx, span := lg.Span(ctx)
defer span.End()
// Add Jitter
timer := time.NewTimer(time.Duration(rand.Intn(300)) * time.Millisecond)
select {
case <-ctx.Done():
timer.Stop()
return
case <-timer.C:
}
span.AddEvent("Cron Run: " + now.Format(time.RFC822))
// fmt.Println("Cron Run: ", now.Format(time.RFC822))
c.state.Use(ctx, func(ctx context.Context, state *state) error {
run = append(run, state.queue...)
state.queue = state.queue[:0]
return nil
})
for _, j := range c.jobs {
if j.Matches(now) {
span.AddEvent(j.String())
run = append(run, j.Task)
}
}
if len(run) == 0 {
return
}
wg, _ := errgroup.WithContext(ctx)
for i := range run {
fn := run[i]
wg.Go(func() error { return fn(ctx, now) })
}
span.SetAttributes(
attribute.String("tick", now.String()),
attribute.Int("count", len(run)),
)
err := wg.Wait()
span.RecordError(err)
}

40
env/env.go vendored Normal file
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@ -0,0 +1,40 @@
package env
import (
"log"
"os"
"strings"
)
func Default(name, defaultValue string) string {
name = strings.TrimSpace(name)
defaultValue = strings.TrimSpace(defaultValue)
if v := strings.TrimSpace(os.Getenv(name)); v != "" {
log.Println("# ", name, "=", v)
return v
}
log.Println("# ", name, "=", defaultValue, "(default)")
return defaultValue
}
type secret string
func (s secret) String() string {
if s == "" {
return "(nil)"
}
return "***"
}
func (s secret) Secret() string {
return string(s)
}
func Secret(name, defaultValue string) secret {
name = strings.TrimSpace(name)
defaultValue = strings.TrimSpace(defaultValue)
if v := strings.TrimSpace(os.Getenv(name)); v != "" {
log.Println("# ", name, "=", secret(v))
return secret(v)
}
log.Println("# ", name, "=", secret(defaultValue), "(default)")
return secret(defaultValue)
}

46
go.mod Normal file
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@ -0,0 +1,46 @@
module go.sour.is/pkg
go 1.20
require (
github.com/matryer/is v1.4.1
go.opentelemetry.io/otel v1.16.0
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.16.0
go.uber.org/multierr v1.11.0
golang.org/x/sync v0.3.0
)
require (
github.com/beorn7/perks v1.0.1 // indirect
github.com/cespare/xxhash/v2 v2.2.0 // indirect
github.com/felixge/httpsnoop v1.0.3 // indirect
github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
github.com/prometheus/client_model v0.4.0 // indirect
github.com/prometheus/common v0.42.0 // indirect
github.com/prometheus/procfs v0.10.1 // indirect
go.opentelemetry.io/otel/sdk/metric v0.39.0 // indirect
)
require (
github.com/cenkalti/backoff/v4 v4.2.1 // indirect
github.com/go-logr/logr v1.2.4 // indirect
github.com/go-logr/stdr v1.2.2 // indirect
github.com/golang/protobuf v1.5.3 // indirect
github.com/grpc-ecosystem/grpc-gateway/v2 v2.7.0 // indirect
github.com/prometheus/client_golang v1.16.0
go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.42.0
go.opentelemetry.io/contrib/instrumentation/runtime v0.42.0
go.opentelemetry.io/otel/exporters/otlp/internal/retry v1.16.0 // indirect
go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.16.0 // indirect
go.opentelemetry.io/otel/exporters/prometheus v0.39.0
go.opentelemetry.io/otel/metric v1.16.0 // indirect
go.opentelemetry.io/otel/sdk v1.16.0 // indirect
go.opentelemetry.io/otel/trace v1.16.0 // indirect
go.opentelemetry.io/proto/otlp v0.19.0 // indirect
golang.org/x/net v0.8.0 // indirect
golang.org/x/sys v0.8.0 // indirect
golang.org/x/text v0.8.0 // indirect
google.golang.org/genproto v0.0.0-20230306155012-7f2fa6fef1f4 // indirect
google.golang.org/grpc v1.55.0 // indirect
google.golang.org/protobuf v1.30.0 // indirect
)

480
go.sum Normal file
View File

@ -0,0 +1,480 @@
cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc=
cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs=
cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc=
cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY=
cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg=
cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc=
cloud.google.com/go/bigquery v1.8.0/go.mod h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ=
cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw=
cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIAii9o8iA=
cloud.google.com/go/pubsub v1.3.1/go.mod h1:i+ucay31+CNRpDW4Lu78I4xXG+O1r/MAHgjpRVR+TSU=
cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0ZeosJ0Rtdos=
cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohlUTyfDhBk=
cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs=
cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
github.com/cenkalti/backoff/v4 v4.2.1 h1:y4OZtCnogmCPw98Zjyt5a6+QwPLGkiQsYW5oUqylYbM=
github.com/cenkalti/backoff/v4 v4.2.1/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE=
github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
github.com/cespare/xxhash v1.1.0 h1:a6HrQnmkObjyL+Gs60czilIUGqrzKutQD6XZog3p+ko=
github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
github.com/cncf/udpa/go v0.0.0-20210930031921-04548b0d99d4/go.mod h1:6pvJx4me5XPnfI9Z40ddWsdw2W/uZgQLFXToKeRcDiI=
github.com/cncf/xds/go v0.0.0-20210312221358-fbca930ec8ed/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
github.com/cncf/xds/go v0.0.0-20210805033703-aa0b78936158/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
github.com/cncf/xds/go v0.0.0-20210922020428-25de7278fc84/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
github.com/cncf/xds/go v0.0.0-20211011173535-cb28da3451f1/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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github.com/jpillora/backoff v1.0.0/go.mod h1:J/6gKK9jxlEcS3zixgDgUAsiuZ7yrSoa/FX5e0EB2j4=
github.com/json-iterator/go v1.1.12/go.mod h1:e30LSqwooZae/UwlEbR2852Gd8hjQvJoHmT4TnhNGBo=
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github.com/julienschmidt/httprouter v1.3.0/go.mod h1:JR6WtHb+2LUe8TCKY3cZOxFyyO8IZAc4RVcycCCAKdM=
github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
github.com/matryer/is v1.4.1 h1:55ehd8zaGABKLXQUe2awZ99BD/PTc2ls+KV/dXphgEQ=
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github.com/matttproud/golang_protobuf_extensions v1.0.4 h1:mmDVorXM7PCGKw94cs5zkfA9PSy5pEvNWRP0ET0TIVo=
github.com/matttproud/golang_protobuf_extensions v1.0.4/go.mod h1:BSXmuO+STAnVfrANrmjBb36TMTDstsz7MSK+HVaYKv4=
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github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
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github.com/prometheus/client_golang v1.16.0 h1:yk/hx9hDbrGHovbci4BY+pRMfSuuat626eFsHb7tmT8=
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github.com/prometheus/procfs v0.10.1 h1:kYK1Va/YMlutzCGazswoHKo//tZVlFpKYh+PymziUAg=
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github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
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go.opencensus.io v0.22.4/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.42.0 h1:pginetY7+onl4qN1vl0xW/V/v6OBZ0vVdH+esuJgvmM=
go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.42.0/go.mod h1:XiYsayHc36K3EByOO6nbAXnAWbrUxdjUROCEeeROOH8=
go.opentelemetry.io/contrib/instrumentation/runtime v0.42.0 h1:EbmAUG9hEAMXyfWEasIt2kmh/WmXUznUksChApTgBGc=
go.opentelemetry.io/contrib/instrumentation/runtime v0.42.0/go.mod h1:rD9feqRYP24P14t5kmhNMqsqm1jvKmpx2H2rKVw52V8=
go.opentelemetry.io/otel v1.16.0 h1:Z7GVAX/UkAXPKsy94IU+i6thsQS4nb7LviLpnaNeW8s=
go.opentelemetry.io/otel v1.16.0/go.mod h1:vl0h9NUa1D5s1nv3A5vZOYWn8av4K8Ml6JDeHrT/bx4=
go.opentelemetry.io/otel/exporters/otlp/internal/retry v1.16.0 h1:t4ZwRPU+emrcvM2e9DHd0Fsf0JTPVcbfa/BhTDF03d0=
go.opentelemetry.io/otel/exporters/otlp/internal/retry v1.16.0/go.mod h1:vLarbg68dH2Wa77g71zmKQqlQ8+8Rq3GRG31uc0WcWI=
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go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.16.0/go.mod h1:JgXSGah17croqhJfhByOLVY719k1emAXC8MVhCIJlRs=
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go.opentelemetry.io/otel/exporters/prometheus v0.39.0 h1:whAaiHxOatgtKd+w0dOi//1KUxj3KoPINZdtDaDj3IA=
go.opentelemetry.io/otel/exporters/prometheus v0.39.0/go.mod h1:4jo5Q4CROlCpSPsXLhymi+LYrDXd2ObU5wbKayfZs7Y=
go.opentelemetry.io/otel/metric v1.16.0 h1:RbrpwVG1Hfv85LgnZ7+txXioPDoh6EdbZHo26Q3hqOo=
go.opentelemetry.io/otel/metric v1.16.0/go.mod h1:QE47cpOmkwipPiefDwo2wDzwJrlfxxNYodqc4xnGCo4=
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go.opentelemetry.io/otel/sdk v1.16.0/go.mod h1:tMsIuKXuuIWPBAOrH+eHtvhTL+SntFtXF9QD68aP6p4=
go.opentelemetry.io/otel/sdk/metric v0.39.0 h1:Kun8i1eYf48kHH83RucG93ffz0zGV1sh46FAScOTuDI=
go.opentelemetry.io/otel/sdk/metric v0.39.0/go.mod h1:piDIRgjcK7u0HCL5pCA4e74qpK/jk3NiUoAHATVAmiI=
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go.uber.org/multierr v1.11.0/go.mod h1:20+QtiLqy0Nd6FdQB9TLXag12DsQkrbs3htMFfDN80Y=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
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golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
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golang.org/x/mobile v0.0.0-20190312151609-d3739f865fa6/go.mod h1:z+o9i4GpDbdi3rU15maQ/Ox0txvL9dWGYEHz965HBQE=
golang.org/x/mobile v0.0.0-20190719004257-d2bd2a29d028/go.mod h1:E/iHnbuqvinMTCcRqshq8CkpyQDoeVncDDYHnLhea+o=
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golang.org/x/mod v0.1.0/go.mod h1:0QHyrYULN0/3qlju5TqG8bIK38QM8yzMo5ekMj3DlcY=
golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
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golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
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golang.org/x/net v0.0.0-20190501004415-9ce7a6920f09/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
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golang.org/x/net v0.0.0-20190603091049-60506f45cf65/go.mod h1:HSz+uSET+XFnRR8LxR5pz3Of3rY3CfYBVs4xY44aLks=
golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20190628185345-da137c7871d7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20190724013045-ca1201d0de80/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20191209160850-c0dbc17a3553/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20200114155413-6afb5195e5aa/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20200202094626-16171245cfb2/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20200222125558-5a598a2470a0/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20200301022130-244492dfa37a/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
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golang.org/x/net v0.0.0-20200520182314-0ba52f642ac2/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
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golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
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golang.org/x/net v0.8.0 h1:Zrh2ngAOFYneWTAIAPethzeaQLuHwhuBkuV6ZiRnUaQ=
golang.org/x/net v0.8.0/go.mod h1:QVkue5JL9kW//ek3r6jTKnTFis1tRmNAW2P1shuFdJc=
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golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
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google.golang.org/genproto v0.0.0-20200825200019-8632dd797987/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
google.golang.org/genproto v0.0.0-20211118181313-81c1377c94b1/go.mod h1:5CzLGKJ67TSI2B9POpiiyGha0AjJvZIUgRMt1dSmuhc=
google.golang.org/genproto v0.0.0-20230306155012-7f2fa6fef1f4 h1:DdoeryqhaXp1LtT/emMP1BRJPHHKFi5akj/nbx/zNTA=
google.golang.org/genproto v0.0.0-20230306155012-7f2fa6fef1f4/go.mod h1:NWraEVixdDnqcqQ30jipen1STv2r/n24Wb7twVTGR4s=
google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
google.golang.org/grpc v1.26.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
google.golang.org/grpc v1.27.1/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
google.golang.org/grpc v1.28.0/go.mod h1:rpkK4SK4GF4Ach/+MFLZUBavHOvF2JJB5uozKKal+60=
google.golang.org/grpc v1.29.1/go.mod h1:itym6AZVZYACWQqET3MqgPpjcuV5QH3BxFS3IjizoKk=
google.golang.org/grpc v1.30.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
google.golang.org/grpc v1.31.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
google.golang.org/grpc v1.33.1/go.mod h1:fr5YgcSWrqhRRxogOsw7RzIpsmvOZ6IcH4kBYTpR3n0=
google.golang.org/grpc v1.36.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
google.golang.org/grpc v1.40.0/go.mod h1:ogyxbiOoUXAkP+4+xa6PZSE9DZgIHtSpzjDTB9KAK34=
google.golang.org/grpc v1.42.0/go.mod h1:k+4IHHFw41K8+bbowsex27ge2rCb65oeWqe4jJ590SU=
google.golang.org/grpc v1.55.0 h1:3Oj82/tFSCeUrRTg/5E/7d/W5A1tj6Ky1ABAuZuv5ag=
google.golang.org/grpc v1.55.0/go.mod h1:iYEXKGkEBhg1PjZQvoYEVPTDkHo1/bjTnfwTeGONTY8=
google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGjtUeSXeh4=
google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
google.golang.org/protobuf v1.30.0 h1:kPPoIgf3TsEvrm0PFe15JQ+570QVxYzEvvHqChK+cng=
google.golang.org/protobuf v1.30.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=

37
gql/common.graphqls Normal file
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@ -0,0 +1,37 @@
scalar Time
scalar Map
type Connection @goModel(model: "go.sour.is/ev/pkg/gql.Connection") {
paging: PageInfo!
edges: [Edge!]!
}
input PageInput @goModel(model: "go.sour.is/ev/pkg/gql.PageInput") {
after: Int = 0
before: Int
count: Int = 30
}
type PageInfo @goModel(model: "go.sour.is/ev/pkg/gql.PageInfo") {
next: Boolean!
prev: Boolean!
begin: Int!
end: Int!
}
interface Edge @goModel(model: "go.sour.is/ev/pkg/gql.Edge"){
id: ID!
}
directive @goModel(
model: String
models: [String!]
) on OBJECT | INPUT_OBJECT | SCALAR | ENUM | INTERFACE | UNION
directive @goField(
forceResolver: Boolean
name: String
) on INPUT_FIELD_DEFINITION | FIELD_DEFINITION
directive @goTag(
key: String!
value: String
) on INPUT_FIELD_DEFINITION | FIELD_DEFINITION

46
gql/connection.go Normal file
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@ -0,0 +1,46 @@
package gql
type Edge interface {
IsEdge()
}
type Connection struct {
Paging *PageInfo `json:"paging"`
Edges []Edge `json:"edges"`
}
type PageInfo struct {
Next bool `json:"next"`
Prev bool `json:"prev"`
Begin uint64 `json:"begin"`
End uint64 `json:"end"`
}
type PageInput struct {
After *int64 `json:"after"`
Before *int64 `json:"before"`
Count *int64 `json:"count"`
}
func (p *PageInput) GetIdx(v int64) int64 {
if p == nil {
// pass
} else if p.Before != nil {
return (*p.Before)
} else if p.After != nil {
return *p.After
}
return v
}
func (p *PageInput) GetCount(v int64) int64 {
if p == nil || p.Count == nil {
return v
} else if p.Before != nil {
return -(*p.Count)
} else if p.After != nil {
return *p.Count
}
return *p.Count
}

14
gql/context.go Normal file
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@ -0,0 +1,14 @@
package gql
import "context"
func ToContext[K comparable, V any](ctx context.Context, key K, value V) context.Context {
return context.WithValue(ctx, key, value)
}
func FromContext[K comparable, V any](ctx context.Context, key K) V {
var empty V
if v, ok := ctx.Value(key).(V); ok {
return v
}
return empty
}

120
gql/graphiql/playground.go Normal file
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@ -0,0 +1,120 @@
package graphiql
import (
"html/template"
"net/http"
"net/url"
)
var page = template.Must(template.New("graphiql").Parse(`<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>{{.title}}</title>
<style>
body {
height: 100%;
margin: 0;
width: 100%;
overflow: hidden;
}
#graphiql {
height: 100vh;
}
</style>
<script
src="https://cdn.jsdelivr.net/npm/react@{{.reactVersion}}/umd/react.production.min.js"
integrity="{{.reactSRI}}"
crossorigin="anonymous"
></script>
<script
src="https://cdn.jsdelivr.net/npm/react-dom@{{.reactVersion}}/umd/react-dom.production.min.js"
integrity="{{.reactDOMSRI}}"
crossorigin="anonymous"
></script>
<link
rel="stylesheet"
href="https://cdn.jsdelivr.net/npm/graphiql@{{.version}}/graphiql.min.css"
x-integrity="{{.cssSRI}}"
crossorigin="anonymous"
/>
</head>
<body>
<div id="graphiql">Loading...</div>
<script
src="https://cdn.jsdelivr.net/npm/graphiql@{{.version}}/graphiql.min.js"
x-integrity="{{.jsSRI}}"
crossorigin="anonymous"
></script>
<script>
{{- if .endpointIsAbsolute}}
const url = {{.endpoint}};
const subscriptionUrl = {{.subscriptionEndpoint}};
{{- else}}
const url = location.protocol + '//' + location.host + {{.endpoint}};
const wsProto = location.protocol == 'https:' ? 'wss:' : 'ws:';
const subscriptionUrl = wsProto + '//' + location.host + {{.endpoint}};
{{- end}}
const fetcher = GraphiQL.createFetcher({ url, subscriptionUrl });
ReactDOM.render(
React.createElement(GraphiQL, {
fetcher: fetcher,
isHeadersEditorEnabled: true,
shouldPersistHeaders: true
}),
document.getElementById('graphiql'),
);
</script>
</body>
</html>
`))
// Handler responsible for setting up the playground
func Handler(title string, endpoint string) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
w.Header().Add("Content-Type", "text/html; charset=UTF-8")
err := page.Execute(w, map[string]interface{}{
"title": title,
"endpoint": endpoint,
"endpointIsAbsolute": endpointHasScheme(endpoint),
"subscriptionEndpoint": getSubscriptionEndpoint(endpoint),
"version": "2.4.1",
"reactVersion": "17.0.2",
"cssSRI": "sha256-bGeEsMhcAqeXBjh2w0eQzBTFAxwlxhM0PKIKqMshlnk=",
"jsSRI": "sha256-s+f7CFAPSUIygFnRC2nfoiEKd3liCUy+snSdYFAoLUc=",
"reactSRI": "sha256-Ipu/TQ50iCCVZBUsZyNJfxrDk0E2yhaEIz0vqI+kFG8=",
"reactDOMSRI": "sha256-nbMykgB6tsOFJ7OdVmPpdqMFVk4ZsqWocT6issAPUF0=",
})
if err != nil {
panic(err)
}
}
}
// endpointHasScheme checks if the endpoint has a scheme.
func endpointHasScheme(endpoint string) bool {
u, err := url.Parse(endpoint)
return err == nil && u.Scheme != ""
}
// getSubscriptionEndpoint returns the subscription endpoint for the given
// endpoint if it is parsable as a URL, or an empty string.
func getSubscriptionEndpoint(endpoint string) string {
u, err := url.Parse(endpoint)
if err != nil {
return ""
}
switch u.Scheme {
case "https":
u.Scheme = "wss"
default:
u.Scheme = "ws"
}
return u.String()
}

62
gql/playground/playground.go Normal file
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@ -0,0 +1,62 @@
package playground
import (
"html/template"
"net/http"
)
var page = template.Must(template.New("graphiql").Parse(`<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8/>
<meta name="viewport" content="user-scalable=no, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, minimal-ui">
<link rel="shortcut icon" href="https://graphcool-playground.netlify.com/favicon.png">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/graphql-playground-react@{{ .version }}/build/static/css/index.css"
integrity="{{ .cssSRI }}" crossorigin="anonymous"/>
<link rel="shortcut icon" href="https://cdn.jsdelivr.net/npm/graphql-playground-react@{{ .version }}/build/favicon.png"
integrity="{{ .faviconSRI }}" crossorigin="anonymous"/>
<script src="https://cdn.jsdelivr.net/npm/graphql-playground-react@{{ .version }}/build/static/js/middleware.js"
integrity="{{ .jsSRI }}" crossorigin="anonymous"></script>
<title>{{.title}}</title>
</head>
<body>
<style type="text/css">
html { font-family: "Open Sans", sans-serif; overflow: hidden; }
body { margin: 0; background: #172a3a; }
</style>
<div id="root"/>
<script type="text/javascript">
window.addEventListener('load', function (event) {
const root = document.getElementById('root');
root.classList.add('playgroundIn');
const wsProto = location.protocol == 'https:' ? 'wss:' : 'ws:'
GraphQLPlayground.init(root, {
endpoint: location.protocol + '//' + location.host + '{{.endpoint}}',
subscriptionsEndpoint: wsProto + '//' + location.host + '{{.endpoint }}',
shareEnabled: true,
settings: {
'request.credentials': 'same-origin'
}
})
})
</script>
</body>
</html>
`))
func Handler(title string, endpoint string) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
w.Header().Add("Content-Type", "text/html")
err := page.Execute(w, map[string]string{
"title": title,
"endpoint": endpoint,
"version": "1.7.28",
"cssSRI": "sha256-dKnNLEFwKSVFpkpjRWe+o/jQDM6n/JsvQ0J3l5Dk3fc=",
"faviconSRI": "sha256-GhTyE+McTU79R4+pRO6ih+4TfsTOrpPwD8ReKFzb3PM=",
"jsSRI": "sha256-VVwEZwxs4qS5W7E+/9nXINYgr/BJRWKOi/rTMUdmmWg=",
})
if err != nil {
panic(err)
}
}
}

143
gql/resolver/resolver.go Normal file
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@ -0,0 +1,143 @@
package resolver
import (
"context"
"fmt"
"net/http"
"os"
"reflect"
"runtime/debug"
"time"
"github.com/99designs/gqlgen/graphql"
"github.com/99designs/gqlgen/graphql/handler"
"github.com/99designs/gqlgen/graphql/handler/extension"
"github.com/99designs/gqlgen/graphql/handler/lru"
"github.com/99designs/gqlgen/graphql/handler/transport"
"github.com/vektah/gqlparser/v2/gqlerror"
"github.com/gorilla/websocket"
"github.com/ravilushqa/otelgqlgen"
"go.sour.is/pkg/gql/graphiql"
"go.sour.is/pkg/gql/playground"
"go.sour.is/pkg/lg"
)
type BaseResolver interface {
ExecutableSchema() graphql.ExecutableSchema
BaseResolver() IsResolver
}
type Resolver[T BaseResolver] struct {
res T
CheckOrigin func(r *http.Request) bool
}
type IsResolver interface {
IsResolver()
}
var defaultCheckOrign = func(r *http.Request) bool {
return true
}
func New[T BaseResolver](ctx context.Context, base T, resolvers ...IsResolver) (*Resolver[T], error) {
_, span := lg.Span(ctx)
defer span.End()
noop := reflect.ValueOf(base.BaseResolver())
v := reflect.ValueOf(base)
v = reflect.Indirect(v)
outer:
for _, idx := range reflect.VisibleFields(v.Type()) {
field := v.FieldByIndex(idx.Index)
for i := range resolvers {
rs := reflect.ValueOf(resolvers[i])
if field.IsNil() && rs.Type().Implements(field.Type()) {
// log.Print("found ", field.Type().Name())
span.AddEvent(fmt.Sprint("found ", field.Type().Name()))
field.Set(rs)
continue outer
}
}
// log.Print(fmt.Sprint("default ", field.Type().Name()))
span.AddEvent(fmt.Sprint("default ", field.Type().Name()))
field.Set(noop)
}
return &Resolver[T]{res: base, CheckOrigin: defaultCheckOrign}, nil
}
func (r *Resolver[T]) Resolver() T {
return r.res
}
// ChainMiddlewares will check all embeded resolvers for a GetMiddleware func and add to handler.
func (r *Resolver[T]) ChainMiddlewares(h http.Handler) http.Handler {
v := reflect.ValueOf(r.Resolver()) // Get reflected value of *Resolver
v = reflect.Indirect(v) // Get the pointed value (returns a zero value on nil)
for _, idx := range reflect.VisibleFields(v.Type()) {
field := v.FieldByIndex(idx.Index)
// log.Print("middleware ", field.Type().Name())
if !field.CanInterface() { // Skip non-interface types.
continue
}
if iface, ok := field.Interface().(interface {
GetMiddleware() func(http.Handler) http.Handler
}); ok {
h = iface.GetMiddleware()(h) // Append only items that fulfill the interface.
}
}
return h
}
func (r *Resolver[T]) RegisterHTTP(mux *http.ServeMux) {
gql := NewServer(r.Resolver().ExecutableSchema(), r.CheckOrigin)
gql.SetRecoverFunc(NoopRecover)
gql.Use(otelgqlgen.Middleware())
mux.Handle("/gql", lg.Htrace(r.ChainMiddlewares(gql), "gql"))
mux.Handle("/graphiql", graphiql.Handler("GraphiQL playground", "/gql"))
mux.Handle("/playground", playground.Handler("GraphQL playground", "/gql"))
}
func NoopRecover(ctx context.Context, err interface{}) error {
if err, ok := err.(string); ok && err == "not implemented" {
return gqlerror.Errorf("not implemented")
}
fmt.Fprintln(os.Stderr, err)
fmt.Fprintln(os.Stderr)
debug.PrintStack()
return gqlerror.Errorf("internal system error")
}
func NewServer(es graphql.ExecutableSchema, checkOrigin func(*http.Request) bool) *handler.Server {
srv := handler.New(es)
srv.AddTransport(transport.Websocket{
Upgrader: websocket.Upgrader{
CheckOrigin: checkOrigin,
},
KeepAlivePingInterval: 10 * time.Second,
})
srv.AddTransport(transport.Options{})
srv.AddTransport(transport.GET{})
srv.AddTransport(transport.POST{})
srv.AddTransport(transport.MultipartForm{})
srv.SetQueryCache(lru.New(1000))
srv.Use(extension.Introspection{})
srv.Use(extension.AutomaticPersistedQuery{
Cache: lru.New(100),
})
return srv
}

31
lg/init.go Normal file
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@ -0,0 +1,31 @@
package lg
import (
"context"
"log"
"go.uber.org/multierr"
)
func Init(ctx context.Context, name string) (context.Context, func(context.Context) error) {
ctx, span := Span(ctx)
defer span.End()
stop := [2]func() error{}
ctx, stop[0] = initMetrics(ctx, name)
ctx, stop[1] = initTracing(ctx, name)
reverse(stop[:])
return ctx, func(context.Context) error {
log.Println("flushing logs...")
errs := make([]error, len(stop))
for i, fn := range stop {
if fn != nil {
errs[i] = fn()
}
}
log.Println("all stopped.")
return multierr.Combine(errs...)
}
}

97
lg/metric.go Normal file
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@ -0,0 +1,97 @@
package lg
import (
"context"
"log"
"net/http"
"time"
"github.com/prometheus/client_golang/prometheus/promhttp"
"go.opentelemetry.io/contrib/instrumentation/runtime"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/exporters/prometheus"
api "go.opentelemetry.io/otel/metric"
sdk "go.opentelemetry.io/otel/sdk/metric"
)
var meterKey = contextKey{"meter"}
var promHTTPKey = contextKey{"promHTTP"}
func Meter(ctx context.Context) api.Meter {
if t := fromContext[contextKey, api.Meter](ctx, tracerKey); t != nil {
return t
}
return otel.Meter("")
}
func NewHTTP(ctx context.Context) *httpHandle {
t := fromContext[contextKey, *prometheus.Exporter](ctx, promHTTPKey)
return &httpHandle{t}
}
func initMetrics(ctx context.Context, name string) (context.Context, func() error) {
// goversion := ""
// pkg := ""
// host := ""
// if info, ok := debug.ReadBuildInfo(); ok {
// goversion = info.GoVersion
// pkg = info.Path
// }
// if h, err := os.Hostname(); err == nil {
// host = h
// }
// config := prometheus.Config{
// DefaultHistogramBoundaries: []float64{
// 2 << 6, 2 << 8, 2 << 10, 2 << 12, 2 << 14, 2 << 16, 2 << 18, 2 << 20, 2 << 22, 2 << 24, 2 << 26, 2 << 28,
// },
// }
// cont := controller.New(
// processor.NewFactory(
// selector.NewWithHistogramDistribution(
// histogram.WithExplicitBoundaries(config.DefaultHistogramBoundaries),
// ),
// aggregation.CumulativeTemporalitySelector(),
// processor.WithMemory(true),
// ),
// controller.WithResource(
// resource.NewWithAttributes(
// semconv.SchemaURL,
// attribute.String("app", name),
// attribute.String("host", host),
// attribute.String("go_version", goversion),
// attribute.String("pkg", pkg),
// ),
// ),
// )
ex, err := prometheus.New()
if err != nil {
return ctx, nil
}
provider := sdk.NewMeterProvider(sdk.WithReader(ex))
meter := provider.Meter(name)
ctx = toContext(ctx, promHTTPKey, ex)
ctx = toContext(ctx, meterKey, meter)
runtime.Start()
return ctx, func() error {
_, cancel := context.WithTimeout(context.Background(), 1*time.Second)
defer cancel()
defer log.Println("metrics stopped")
return nil
}
}
type httpHandle struct {
exp *prometheus.Exporter
}
func (h *httpHandle) RegisterHTTP(mux *http.ServeMux) {
if h.exp == nil {
return
}
mux.Handle("/metrics", promhttp.Handler())
}

177
lg/tracer.go Normal file
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package lg
import (
"context"
"fmt"
"log"
"net/http"
"runtime"
"strconv"
"time"
"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp"
"go.opentelemetry.io/otel/propagation"
"go.opentelemetry.io/otel/sdk/resource"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
semconv "go.opentelemetry.io/otel/semconv/v1.4.0"
"go.opentelemetry.io/otel/trace"
"go.sour.is/pkg/env"
)
type contextKey struct {
name string
}
var tracerKey = contextKey{"tracer"}
func Tracer(ctx context.Context) trace.Tracer {
if t := fromContext[contextKey, trace.Tracer](ctx, tracerKey); t != nil {
return t
}
return otel.Tracer("")
}
func attrs(ctx context.Context) (string, []attribute.KeyValue) {
var attrs []attribute.KeyValue
var name string
if pc, file, line, ok := runtime.Caller(2); ok {
if fn := runtime.FuncForPC(pc); fn != nil {
name = fn.Name()
}
attrs = append(attrs,
attribute.String("pc", fmt.Sprintf("%v", pc)),
attribute.String("file", file),
attribute.Int("line", line),
)
}
return name, attrs
}
func Span(ctx context.Context, opts ...trace.SpanStartOption) (context.Context, trace.Span) {
name, attrs := attrs(ctx)
attrs = append(attrs, attribute.String("name", name))
ctx, span := Tracer(ctx).Start(ctx, name, opts...)
span.SetAttributes(attrs...)
return ctx, span
}
func NamedSpan(ctx context.Context, name string, opts ...trace.SpanStartOption) (context.Context, trace.Span) {
_, attrs := attrs(ctx)
attrs = append(attrs, attribute.String("name", name))
ctx, span := Tracer(ctx).Start(ctx, name, opts...)
span.SetAttributes(attrs...)
return ctx, span
}
func Fork(ctx context.Context, opts ...trace.SpanStartOption) (context.Context, trace.Span) {
name, attrs := attrs(ctx)
childCTX, childSpan := Tracer(ctx).Start(context.Background(), name, append(opts, trace.WithLinks(trace.LinkFromContext(ctx)))...)
childSpan.SetAttributes(attrs...)
_, span := Tracer(ctx).Start(ctx, name, append(opts, trace.WithLinks(trace.LinkFromContext(childCTX)))...)
span.SetAttributes(attrs...)
defer span.End()
return childCTX, childSpan
}
type SampleRate string
const (
SampleAlways SampleRate = "always"
SampleNever SampleRate = "never"
)
func initTracing(ctx context.Context, name string) (context.Context, func() error) {
res, err := resource.New(ctx,
resource.WithAttributes(
semconv.ServiceNameKey.String(name),
),
)
if err != nil {
log.Println(wrap(err, "failed to create trace resource"))
return ctx, nil
}
exporterAddr := env.Default("EV_TRACE_ENDPOINT", "")
if exporterAddr == "" {
return ctx, nil
}
traceExporter, err := otlptracehttp.New(ctx,
otlptracehttp.WithInsecure(),
otlptracehttp.WithEndpoint(exporterAddr),
)
if err != nil {
log.Println(wrap(err, "failed to create trace exporter"))
return ctx, nil
}
bsp := sdktrace.NewBatchSpanProcessor(traceExporter)
var sample sdktrace.TracerProviderOption
sampleRate := SampleRate(env.Default("EV_TRACE_SAMPLE", string(SampleNever)))
switch sampleRate {
case "always":
sample = sdktrace.WithSampler(sdktrace.AlwaysSample())
case "never":
sample = sdktrace.WithSampler(sdktrace.NeverSample())
default:
if v, err := strconv.Atoi(string(sampleRate)); err != nil {
sample = sdktrace.WithSampler(sdktrace.NeverSample())
} else {
sample = sdktrace.WithSampler(sdktrace.TraceIDRatioBased(float64(v) * 0.01))
}
}
tracerProvider := sdktrace.NewTracerProvider(
sample,
sdktrace.WithResource(res),
sdktrace.WithSpanProcessor(bsp),
)
otel.SetTracerProvider(tracerProvider)
otel.SetTextMapPropagator(propagation.TraceContext{})
ctx = toContext(ctx, tracerKey, otel.Tracer(name))
return ctx, func() error {
ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
defer cancel()
defer log.Println("tracer stopped")
return wrap(tracerProvider.Shutdown(ctx), "failed to shutdown TracerProvider")
}
}
func wrap(err error, s string) error {
if err != nil {
return fmt.Errorf(s, err)
}
return nil
}
func reverse[T any](s []T) {
first, last := 0, len(s)-1
for first < last {
s[first], s[last] = s[last], s[first]
first++
last--
}
}
func Htrace(h http.Handler, name string) http.Handler {
return otelhttp.NewHandler(h, name, otelhttp.WithSpanNameFormatter(func(operation string, r *http.Request) string {
return fmt.Sprintf("%s: %s", operation, r.RequestURI)
}))
}
func toContext[K comparable, V any](ctx context.Context, key K, value V) context.Context {
return context.WithValue(ctx, key, value)
}
func fromContext[K comparable, V any](ctx context.Context, key K) V {
var empty V
if v, ok := ctx.Value(key).(V); ok {
return v
}
return empty
}

74
locker/locker.go Normal file
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package locker
import (
"context"
"errors"
"fmt"
"go.opentelemetry.io/otel/attribute"
"go.sour.is/pkg/lg"
)
type Locked[T any] struct {
state chan *T
}
// New creates a new locker for the given value.
func New[T any](initial *T) *Locked[T] {
s := &Locked[T]{}
s.state = make(chan *T, 1)
s.state <- initial
return s
}
type ctxKey struct{ name string }
// Use will call the function with the locked value
func (s *Locked[T]) Use(ctx context.Context, fn func(context.Context, *T) error) error {
if s == nil {
return fmt.Errorf("locker not initialized")
}
key := ctxKey{fmt.Sprintf("%p", s)}
if value := ctx.Value(key); value != nil {
return fmt.Errorf("%w: %T", ErrNested, s)
}
ctx = context.WithValue(ctx, key, key)
ctx, span := lg.Span(ctx)
defer span.End()
var t T
span.SetAttributes(
attribute.String("typeOf", fmt.Sprintf("%T", t)),
)
if ctx.Err() != nil {
return ctx.Err()
}
select {
case state := <-s.state:
defer func() { s.state <- state }()
return fn(ctx, state)
case <-ctx.Done():
return ctx.Err()
}
}
// Copy will return a shallow copy of the locked object.
func (s *Locked[T]) Copy(ctx context.Context) (T, error) {
var t T
err := s.Use(ctx, func(ctx context.Context, c *T) error {
if c != nil {
t = *c
}
return nil
})
return t, err
}
var ErrNested = errors.New("nested locker call")

96
locker/locker_test.go Normal file
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package locker_test
import (
"context"
"errors"
"testing"
"github.com/matryer/is"
"go.sour.is/pkg/locker"
)
type config struct {
Value string
Counter int
}
func TestLocker(t *testing.T) {
is := is.New(t)
value := locker.New(&config{})
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
err := value.Use(ctx, func(ctx context.Context, c *config) error {
c.Value = "one"
c.Counter++
return nil
})
is.NoErr(err)
c, err := value.Copy(context.Background())
is.NoErr(err)
is.Equal(c.Value, "one")
is.Equal(c.Counter, 1)
wait := make(chan struct{})
go value.Use(ctx, func(ctx context.Context, c *config) error {
c.Value = "two"
c.Counter++
close(wait)
return nil
})
<-wait
cancel()
err = value.Use(ctx, func(ctx context.Context, c *config) error {
c.Value = "three"
c.Counter++
return nil
})
is.True(err != nil)
c, err = value.Copy(context.Background())
is.NoErr(err)
is.Equal(c.Value, "two")
is.Equal(c.Counter, 2)
}
func TestNestedLocker(t *testing.T) {
is := is.New(t)
value := locker.New(&config{})
other := locker.New(&config{})
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
err := value.Use(ctx, func(ctx context.Context, c *config) error {
return value.Use(ctx, func(ctx context.Context, t *config) error {
return nil
})
})
is.True(errors.Is(err, locker.ErrNested))
err = value.Use(ctx, func(ctx context.Context, c *config) error {
return other.Use(ctx, func(ctx context.Context, t *config) error {
return nil
})
})
is.NoErr(err)
err = value.Use(ctx, func(ctx context.Context, c *config) error {
return other.Use(ctx, func(ctx context.Context, t *config) error {
return value.Use(ctx, func(ctx context.Context, x *config) error {
return nil
})
})
})
is.True(errors.Is(err, locker.ErrNested))
}

71
math/math.go Normal file
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package math
type signed interface {
~int | ~int8 | ~int16 | ~int32 | ~int64
}
type unsigned interface {
~uint | ~uint8 | ~uint16 | ~uint32 | ~uint64 | ~uintptr
}
type integer interface {
signed | unsigned
}
type float interface {
~float32 | ~float64
}
type ordered interface {
integer | float | ~string
}
func Abs[T signed](i T) T {
if i > 0 {
return i
}
return -i
}
func Max[T ordered](i T, candidates ...T) T {
for _, j := range candidates {
if i < j {
i = j
}
}
return i
}
func Min[T ordered](i T, candidates ...T) T {
for _, j := range candidates {
if i > j {
i = j
}
}
return i
}
func PagerBox(first, last uint64, pos, count int64) (uint64, int64) {
var start uint64
if pos >= 0 {
if int64(first) > pos {
start = first
} else {
start = uint64(pos) + 1
}
} else {
start = uint64(int64(last) + pos + 1)
}
switch {
case count > 0:
count = Min(count, int64(last-start)+1)
case pos >= 0 && count < 0:
count = Max(count, int64(first-start))
case pos < 0 && count < 0:
count = Max(count, int64(first-start)-1)
}
if count == 0 || (start < first && count <= 0) || (start > last && count >= 0) {
return 0, 0
}
return start, count
}

96
math/math_test.go Normal file
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package math_test
import (
"testing"
"github.com/matryer/is"
"go.sour.is/pkg/math"
)
func TestMath(t *testing.T) {
is := is.New(t)
is.Equal(5, math.Abs(-5))
is.Equal(math.Abs(5), math.Abs(-5))
is.Equal(10, math.Max(1, 2, 3, 4, 5, 6, 7, 8, 9, 10))
is.Equal(1, math.Min(1, 2, 3, 4, 5, 6, 7, 8, 9, 10))
is.Equal(1, math.Min(89, 71, 54, 48, 49, 1, 72, 88, 25, 69))
is.Equal(89, math.Max(89, 71, 54, 48, 49, 1, 72, 88, 25, 69))
is.Equal(0.9348207729, math.Max(
0.3943310720,
0.1090868377,
0.9348207729,
0.3525527584,
0.4359833682,
0.7958538081,
0.1439352569,
0.1547311967,
0.6403818871,
0.8618832818,
))
is.Equal(0.1090868377, math.Min(
0.3943310720,
0.1090868377,
0.9348207729,
0.3525527584,
0.4359833682,
0.7958538081,
0.1439352569,
0.1547311967,
0.6403818871,
0.8618832818,
))
}
func TestPagerBox(t *testing.T) {
is := is.New(t)
tests := []struct {
first uint64
last uint64
pos int64
n int64
start uint64
count int64
}{
{1, 10, 0, 10, 1, 10},
{1, 10, 0, 11, 1, 10},
{1, 5, 0, 10, 1, 5},
{1, 10, 4, 10, 5, 6},
{1, 10, 5, 10, 6, 5},
{1, 10, 0, -10, 0, 0},
{1, 10, 1, -1, 2, -1},
{1, 10, 1, -10, 2, -1},
{1, 10, -1, 1, 10, 1},
{1, 10, -2, 10, 9, 2},
{1, 10, -1, -1, 10, -1},
{1, 10, -2, -10, 9, -9},
{1, 10, 0, -10, 0, 0},
{1, 10, 10, 10, 0, 0},
{1, 10, 0, AllEvents, 1, 10},
{1, 10, -1, -AllEvents, 10, -10},
{5, 10, 0, 1, 5, 1},
}
for _, tt := range tests {
start, count := math.PagerBox(tt.first, tt.last, tt.pos, tt.n)
if count > 0 {
t.Log(tt, "|", start, count, int64(start)+count-1)
} else {
t.Log(tt, "|", start, count, int64(start)+count+1)
}
is.Equal(start, tt.start)
is.Equal(count, tt.count)
}
}
const AppendOnly = ^uint64(0)
const AllEvents = int64(AppendOnly >> 1)

43
mux/httpmux.go Normal file
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package mux
import (
"net/http"
)
type mux struct {
*http.ServeMux
api *http.ServeMux
wellknown *http.ServeMux
}
func (mux *mux) Add(fns ...interface{ RegisterHTTP(*http.ServeMux) }) {
for _, fn := range fns {
// log.Printf("HTTP: %T", fn)
fn.RegisterHTTP(mux.ServeMux)
if fn, ok := fn.(interface{ RegisterAPIv1(*http.ServeMux) }); ok {
// log.Printf("APIv1: %T", fn)
fn.RegisterAPIv1(mux.api)
}
if fn, ok := fn.(interface{ RegisterWellKnown(*http.ServeMux) }); ok {
// log.Printf("WellKnown: %T", fn)
fn.RegisterWellKnown(mux.wellknown)
}
}
}
func New() *mux {
mux := &mux{
api: http.NewServeMux(),
wellknown: http.NewServeMux(),
ServeMux: http.NewServeMux(),
}
mux.Handle("/api/v1/", http.StripPrefix("/api/v1", mux.api))
mux.Handle("/.well-known/", http.StripPrefix("/.well-known", mux.wellknown))
return mux
}
type RegisterHTTP func(*http.ServeMux)
func (fn RegisterHTTP) RegisterHTTP(mux *http.ServeMux) { fn(mux) }

104
mux/httpmux_test.go Normal file
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package mux_test
import (
"net/http"
"net/http/httptest"
"testing"
"github.com/matryer/is"
"go.sour.is/pkg/mux"
)
type mockHTTP struct {
onServeHTTP func()
onServeAPIv1 func()
onServeWellKnown func()
}
func (*mockHTTP) ServeFn(fn func()) func(w http.ResponseWriter, r *http.Request) {
return func(w http.ResponseWriter, r *http.Request) { fn() }
}
func (h *mockHTTP) RegisterHTTP(mux *http.ServeMux) {
mux.HandleFunc("/", h.ServeFn(h.onServeHTTP))
}
func (h *mockHTTP) RegisterAPIv1(mux *http.ServeMux) {
mux.HandleFunc("/ping", h.ServeFn(h.onServeAPIv1))
}
func (h *mockHTTP) RegisterWellKnown(mux *http.ServeMux) {
mux.HandleFunc("/echo", h.ServeFn(h.onServeWellKnown))
}
func TestHttp(t *testing.T) {
is := is.New(t)
called := false
calledAPIv1 := false
calledWellKnown := false
mux := mux.New()
mux.Add(&mockHTTP{
func() { called = true },
func() { calledAPIv1 = true },
func() { calledWellKnown = true },
})
is.True(mux != nil)
w := httptest.NewRecorder()
r := httptest.NewRequest(http.MethodGet, "/", nil)
mux.ServeHTTP(w, r)
is.True(called)
is.True(!calledAPIv1)
is.True(!calledWellKnown)
}
func TestHttpAPIv1(t *testing.T) {
is := is.New(t)
called := false
calledAPIv1 := false
calledWellKnown := false
mux := mux.New()
mux.Add(&mockHTTP{
func() { called = true },
func() { calledAPIv1 = true },
func() { calledWellKnown = true },
})
is.True(mux != nil)
w := httptest.NewRecorder()
r := httptest.NewRequest(http.MethodGet, "/api/v1/ping", nil)
mux.ServeHTTP(w, r)
is.True(!called)
is.True(calledAPIv1)
is.True(!calledWellKnown)
}
func TestHttpWellKnown(t *testing.T) {
is := is.New(t)
called := false
calledAPIv1 := false
calledWellKnown := false
mux := mux.New()
mux.Add(&mockHTTP{
func() { called = true },
func() { calledAPIv1 = true },
func() { calledWellKnown = true },
})
is.True(mux != nil)
w := httptest.NewRecorder()
r := httptest.NewRequest(http.MethodGet, "/.well-known/echo", nil)
mux.ServeHTTP(w, r)
is.True(!called)
is.True(!calledAPIv1)
is.True(calledWellKnown)
}

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service/service.go Normal file
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package service
import (
"context"
"log"
"net/http"
"runtime/debug"
"sort"
"strings"
"time"
"go.opentelemetry.io/otel/attribute"
"go.uber.org/multierr"
"golang.org/x/sync/errgroup"
"go.sour.is/pkg/cron"
"go.sour.is/pkg/lg"
)
type crontab interface {
NewCron(expr string, task func(context.Context, time.Time) error)
RunOnce(ctx context.Context, once func(context.Context, time.Time) error)
}
type Harness struct {
crontab
Services []any
onStart []func(context.Context) error
onRunning chan struct{}
onStop []func(context.Context) error
}
func (s *Harness) Setup(ctx context.Context, apps ...application) error {
ctx, span := lg.Span(ctx)
defer span.End()
// setup crontab
c := cron.New(cron.DefaultGranularity)
s.OnStart(c.Run)
s.onRunning = make(chan struct{})
s.crontab = c
var err error
for _, app := range apps {
err = multierr.Append(err, app(ctx, s))
}
span.RecordError(err)
return err
}
func (s *Harness) OnStart(fn func(context.Context) error) {
s.onStart = append(s.onStart, fn)
}
func (s *Harness) OnRunning() <-chan struct{} {
return s.onRunning
}
func (s *Harness) OnStop(fn func(context.Context) error) {
s.onStop = append(s.onStop, fn)
}
func (s *Harness) Add(svcs ...any) {
s.Services = append(s.Services, svcs...)
}
func (s *Harness) stop(ctx context.Context) error {
g, _ := errgroup.WithContext(ctx)
for i := range s.onStop {
fn := s.onStop[i]
g.Go(func() error {
if err := fn(ctx); err != nil && err != http.ErrServerClosed {
return err
}
return nil
})
}
return g.Wait()
}
func (s *Harness) Run(ctx context.Context, appName, version string) error {
{
ctx, span := lg.Span(ctx)
log.Println(appName, version)
span.SetAttributes(
attribute.String("app", appName),
attribute.String("version", version),
)
Mup, err := lg.Meter(ctx).Int64UpDownCounter("up")
if err != nil {
return err
}
Mup.Add(ctx, 1)
span.End()
}
g, _ := errgroup.WithContext(ctx)
g.Go(func() error {
<-ctx.Done()
// shutdown jobs
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
return s.stop(ctx)
})
for i := range s.onStart {
fn := s.onStart[i]
g.Go(func() error { return fn(ctx) })
}
close(s.onRunning)
err := g.Wait()
return err
}
type application func(context.Context, *Harness) error // Len is the number of elements in the collection.
type appscore struct {
score int
application
}
type Apps []appscore
func (a *Apps) Apps() []application {
sort.Sort(a)
lis := make([]application, len(*a))
for i, app := range *a {
lis[i] = app.application
}
return lis
}
// Len is the number of elements in the collection.
func (a *Apps) Len() int {
if a == nil {
return 0
}
return len(*a)
}
// Less reports whether the element with index i
func (a *Apps) Less(i int, j int) bool {
if a == nil {
return false
}
return (*a)[i].score < (*a)[j].score
}
// Swap swaps the elements with indexes i and j.
func (a *Apps) Swap(i int, j int) {
if a == nil {
return
}
(*a)[i], (*a)[j] = (*a)[j], (*a)[i]
}
func (a *Apps) Register(score int, app application) (none struct{}) {
if a == nil {
return
}
*a = append(*a, appscore{score, app})
return
}
func AppName() (string, string) {
if info, ok := debug.ReadBuildInfo(); ok {
_, name, _ := strings.Cut(info.Main.Path, "/")
name = strings.Replace(name, "-", ".", -1)
name = strings.Replace(name, "/", "-", -1)
return name, info.Main.Version
}
return "sour.is-app", "(devel)"
}

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set/set.go Normal file
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package set
import (
"fmt"
"sort"
"strings"
"go.sour.is/pkg/math"
)
type Set[T comparable] map[T]struct{}
func New[T comparable](items ...T) Set[T] {
s := make(map[T]struct{}, len(items))
for i := range items {
s[items[i]] = struct{}{}
}
return s
}
func (s Set[T]) Has(v T) bool {
_, ok := (s)[v]
return ok
}
func (s Set[T]) Add(items ...T) Set[T] {
for _, i := range items {
s[i] = struct{}{}
}
return s
}
func (s Set[T]) Delete(items ...T) Set[T] {
for _, i := range items {
delete(s, i)
}
return s
}
func (s Set[T]) Equal(e Set[T]) bool {
for k := range s {
if _, ok := e[k]; !ok {
return false
}
}
for k := range e {
if _, ok := s[k]; !ok {
return false
}
}
return true
}
func (s Set[T]) String() string {
if s == nil {
return "set(<nil>)"
}
lis := make([]string, 0, len(s))
for k := range s {
lis = append(lis, fmt.Sprint(k))
}
var b strings.Builder
b.WriteString("set(")
b.WriteString(strings.Join(lis, ","))
b.WriteString(")")
return b.String()
}
type ordered interface {
~int | ~int8 | ~int16 | ~int32 | ~int64 |
~uint | ~uint8 | ~uint16 | ~uint32 | ~uint64 | ~uintptr |
~float32 | ~float64
}
type BoundSet[T ordered] struct {
min, max T
s Set[T]
}
func NewBoundSet[T ordered](min, max T, items ...T) *BoundSet[T] {
b := &BoundSet[T]{
min: min,
max: max,
s: New[T](),
}
b.Add(items...)
return b
}
func (l *BoundSet[T]) Add(items ...T) *BoundSet[T] {
n := 0
for i := range items {
if items[i] >= l.min && items[i] <= l.max {
items[n] = items[i]
n++
}
}
l.s.Add(items[:n]...)
return l
}
func (l *BoundSet[T]) AddRange(min, max T) {
min = math.Max(min, l.min)
max = math.Min(max, l.max)
var lis []T
for ; min <= max; min++ {
lis = append(lis, min)
}
l.s.Add(lis...)
}
func (l *BoundSet[T]) Delete(items ...T) *BoundSet[T] {
n := 0
for i := range items {
if items[i] >= l.min && items[i] <= l.max {
items[n] = items[i]
n++
}
}
l.s.Delete(items[:n]...)
return l
}
func (l *BoundSet[T]) Has(v T) bool {
return l.s.Has(v)
}
func (l *BoundSet[T]) String() string {
lis := make([]string, len(l.s))
n := 0
for k := range l.s {
lis[n] = fmt.Sprint(k)
n++
}
sort.Strings(lis)
var b strings.Builder
b.WriteString("set(")
b.WriteString(strings.Join(lis, ","))
b.WriteString(")")
return b.String()
}

39
set/set_test.go Normal file
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package set_test
import (
"strings"
"testing"
"github.com/matryer/is"
"go.sour.is/pkg/set"
)
func TestStringSet(t *testing.T) {
is := is.New(t)
s := set.New(strings.Fields("one two three")...)
is.True(s.Has("one"))
is.True(s.Has("two"))
is.True(s.Has("three"))
is.True(!s.Has("four"))
is.Equal(set.New("one").String(), "set(one)")
var n set.Set[string]
is.Equal(n.String(), "set(<nil>)")
}
func TestBoundSet(t *testing.T) {
is := is.New(t)
s := set.NewBoundSet(1, 100, 1, 2, 3, 100, 1001)
is.True(s.Has(1))
is.True(s.Has(2))
is.True(s.Has(3))
is.True(!s.Has(1001))
is.Equal(set.NewBoundSet(1, 100, 1).String(), "set(1)")
}

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slice/slice.go Normal file
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package slice
import (
"go.sour.is/pkg/math"
)
// FilterType returns a subset that matches the type.
func FilterType[T any](in ...any) []T {
lis := make([]T, 0, len(in))
for _, u := range in {
if t, ok := u.(T); ok {
lis = append(lis, t)
}
}
return lis
}
func FilterFn[T any](fn func(T) bool, in ...T) []T {
lis := make([]T, 0, len(in))
for _, t := range in {
if fn(t) {
lis = append(lis, t)
}
}
return lis
}
// Find returns the first of type found. or false if not found.
func Find[T any](in ...any) (T, bool) {
return First(FilterType[T](in...)...)
}
func FindFn[T any](fn func(T) bool, in ...T) (T, bool) {
return First(FilterFn(fn, in...)...)
}
// First returns the first element in a slice.
func First[T any](in ...T) (T, bool) {
if len(in) == 0 {
var zero T
return zero, false
}
return in[0], true
}
// Map applys func to each element s and returns results as slice.
func Map[T, U any](f func(int, T) U) func(...T) []U {
return func(lis ...T) []U {
r := make([]U, len(lis))
for i, v := range lis {
r[i] = f(i, v)
}
return r
}
}
func Reduce[T, R any](r R, fn func(T, R, int) R) func(...T) R {
return func(lis ...T) R {
for i, t := range lis {
r = fn(t, r, i)
}
return r
}
}
type Pair[K comparable, V any] struct {
Key K
Value V
}
func FromMap[K comparable, V any](m map[K]V) (keys []K, values []V) {
if m == nil {
return nil, nil
}
keys = FromMapKeys(m)
return keys, FromMapValues(m, keys)
}
func FromMapKeys[K comparable, V any](m map[K]V) (keys []K) {
if m == nil {
return nil
}
keys = make([]K, 0, len(m))
for k := range m {
keys = append(keys, k)
}
return keys
}
func FromMapValues[K comparable, V any](m map[K]V, keys []K) (values []V) {
if m == nil {
return nil
}
values = make([]V, 0, len(keys))
for _, k := range keys {
values = append(values, m[k])
}
return values
}
func ToMap[K comparable, V any](keys []K, values []V) (m map[K]V) {
m = make(map[K]V, len(keys))
for i := range keys {
if len(values) < i {
break
}
m[keys[i]] = values[i]
}
return m
}
func Zip[K comparable, V any](k []K, v []V) []Pair[K, V] {
lis := make([]Pair[K, V], math.Max(len(k), len(v)))
for i := range lis {
if k != nil && len(k) > i {
lis[i].Key = k[i]
}
if v != nil && len(v) > i {
lis[i].Value = v[i]
}
}
return lis
}
func Align[T any](k []T, v []T, less func(T, T) bool) []Pair[*T, *T] {
lis := make([]Pair[*T, *T], 0, math.Max(len(k), len(v)))
var j int
for i := 0; i < len(k); {
if j >= len(v) || less(k[i], v[j]) {
lis = append(lis, Pair[*T, *T]{&k[i], nil})
i++
continue
}
if less(v[j], k[i]) {
lis = append(lis, Pair[*T, *T]{nil, &v[j]})
j++
continue
}
lis = append(lis, Pair[*T, *T]{&k[i], &v[j]})
i++
j++
}
for ; j < len(v); j++ {
lis = append(lis, Pair[*T, *T]{nil, &v[j]})
}
return lis
}

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slice/slice_test.go Normal file
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package slice_test
import (
"testing"
"github.com/matryer/is"
"go.sour.is/pkg/slice"
)
func TestAlign(t *testing.T) {
type testCase struct {
left, right []string
combined []slice.Pair[*string, *string]
}
tests := []testCase{
{
left: []string{"1", "3", "5"},
right: []string{"2", "3", "4"},
combined: []slice.Pair[*string, *string]{
{ptr("1"), nil},
{nil, ptr("2")},
{ptr("3"), ptr("3")},
{nil, ptr("4")},
{ptr("5"), nil},
},
},
{
left: []string{"2", "3", "4"},
right: []string{"1", "3", "5"},
combined: []slice.Pair[*string, *string]{
{nil, ptr("1")},
{ptr("2"), nil},
{ptr("3"), ptr("3")},
{ptr("4"), nil},
{nil, ptr("5")},
},
},
}
is := is.New(t)
for _, tt := range tests {
combined := slice.Align(tt.left, tt.right, func(l, r string) bool { return l < r })
is.Equal(len(combined), len(tt.combined))
for i := range combined {
is.Equal(combined[i], tt.combined[i])
}
}
}
func ptr[T any](v T) *T { return &v }

30
xdg/path_darwin.go Normal file
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//go:build darwin
// +build darwin
package xdg
func literal(name string) string {
return "$" + name
}
const (
defaultDataHome = "~/Library/Application Support"
defaultDataDirs = "/Library/Application Support"
defaultConfigHome = "~/Library/Preferences"
defaultConfigDirs = "/Library/Preferences"
defaultCacheHome = "~/Library/Caches"
defaultStateHome = "~/Library/Caches"
defaultRuntime = "~/Library/Application Support"
defaultDesktop = "~/Desktop"
defaultDownload = "~/Downloads"
defaultDocuments = "~/Documents"
defaultMusic = "~/Music"
defaultPictures = "~/Pictures"
defaultVideos = "~/Videos"
defaultTemplates = "~/Templates"
defaultPublic = "~/Public"
defaultApplicationDirs = "~/Applications:/Applications"
defaultFontDirs = "~/Library/Fonts:/Library/Fonts:/System/Library/Fonts:/Network/Library/Fonts"
)

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xdg/path_linux.go Normal file
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//go:build linux
// +build linux
package xdg
func literal(name string) string {
return "$" + name
}
const (
defaultDataHome = "~/.local/share"
defaultDataDirs = "/usr/local/share:/usr/share"
defaultConfigHome = "~/.config"
defaultConfigDirs = "/etc/xdg"
defaultCacheHome = "~/.local/cache"
defaultStateHome = "~/.local/state"
defaultRuntime = "/run/user/$UID"
defaultDesktop = "~/Desktop"
defaultDownload = "~/Downloads"
defaultDocuments = "~/Documents"
defaultMusic = "~/Music"
defaultPictures = "~/Pictures"
defaultVideos = "~/Videos"
defaultTemplates = "~/Templates"
defaultPublic = "~/Public"
defaultApplicationDirs = "~/Applications:/Applications"
defaultFontDirs = "~/.local/share/fonts:/usr/local/share/fonts:/usr/share/fonts:~/.fonts"
)

30
xdg/path_windows.go Normal file
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//go:build windows
// +build windows
package xdg
func literal(name string) string {
return "%" + name + "%"
}
const (
defaultDataHome = `%LOCALAPPDATA%`
defaultDataDirs = `%APPDATA%\Roaming;%ProgramData%`
defaultConfigHome = `%LOCALAPPDATA%`
defaultConfigDirs = `%ProgramData%`
defaultCacheHome = `%LOCALAPPDATA%\cache`
defaultStateHome = `%LOCALAPPDATA%\state`
defaultRuntime = `%LOCALAPPDATA%`
defaultDesktop = `%USERPROFILE%\Desktop`
defaultDownload = `%USERPROFILE%\Downloads`
defaultDocuments = `%USERPROFILE%\Documents`
defaultMusic = `%USERPROFILE%\Music`
defaultPictures = `%USERPROFILE%\Pictures`
defaultVideos = `%USERPROFILE%\Videos`
defaultTemplates = `%USERPROFILE%\Templates`
defaultPublic = `%USERPROFILE%\Public`
defaultApplicationDirs = `%APPDATA%\Roaming\Microsoft\Windows\Start Menu\Programs`
defaultFontDirs = `%windir%\Fonts;%LOCALAPPDATA%\Microsoft\Windows\Fonts`
)

52
xdg/xdg.go Normal file
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package xdg
import (
"os"
"path/filepath"
"strings"
)
var (
EnvDataHome = setENV("XDG_DATA_HOME", defaultDataHome)
EnvDataDirs = setENV("XDG_DATA_DIRS", defaultDataDirs)
EnvConfigHome = setENV("XDG_CONFIG_HOME", defaultConfigHome)
EnvConfigDirs = setENV("XDG_CONFIG_DIRS", defaultConfigDirs)
EnvCacheHome = setENV("XDG_CACHE_HOME", defaultCacheHome)
EnvStateHome = setENV("XDG_STATE_HOME", defaultStateHome)
EnvRuntime = setENV("XDG_RUNTIME_DIR", defaultRuntime)
EnvDesktopDir = setENV("XDG_DESKTOP_DIR", defaultDesktop)
EnvDownloadDir = setENV("XDG_DOWNLOAD_DIR", defaultDownload)
EnvDocumentsDir = setENV("XDG_DOCUMENTS_DIR", defaultDocuments)
EnvMusicDir = setENV("XDG_MUSIC_DIR", defaultMusic)
EnvPicturesDir = setENV("XDG_PICTURES_DIR", defaultPictures)
EnvVideosDir = setENV("XDG_VIDEOS_DIR", defaultVideos)
EnvTemplatesDir = setENV("XDG_TEMPLATES_DIR", defaultTemplates)
EnvPublicShareDir = setENV("XDG_PUBLICSHARE_DIR", defaultPublic)
EnvApplicationsDir = setENV("XDG_APPLICATIONS_DIR", defaultApplicationDirs)
EnvFontsDir = setENV("XDG_FONTS_DIR", defaultFontDirs)
)
func setENV(name, value string) string {
if _, ok := os.LookupEnv(name); !ok {
os.Setenv(name, value)
}
return literal(name)
}
func Get(base, suffix string) string {
paths := strings.Split(os.ExpandEnv(base), string(os.PathListSeparator))
for i, path := range paths {
if strings.HasPrefix(path, "~") {
path = strings.Replace(path, "~", getHome(), 1)
}
paths[i] = os.ExpandEnv(filepath.Join(path, suffix))
}
return strings.Join(paths, string(os.PathListSeparator))
}
func getHome() string {
home, err := os.UserHomeDir()
if err != nil {
return "."
}
return home
}