change to index handling and initial markdown support

go.mod

@@ -9,6 +9,7 @@ require (
 	github.com/docopt/docopt.go v0.0.0-20180111231733-ee0de3bc6815
 	github.com/go-swagger/go-swagger v0.25.0
 	github.com/golang/gddo v0.0.0-20200831202555-721e228c7686 // indirect
+	github.com/gomarkdown/markdown v0.0.0-20200824053859-8c8b3816f167
 	github.com/gorilla/mux v1.8.0
 	github.com/h2non/filetype v1.1.0
 	github.com/remyoudompheng/go-liblzma v0.0.0-20190506200333-81bf2d431b96

go.sum

@@ -222,6 +222,8 @@ github.com/golang/protobuf v1.4.1/go.mod h1:U8fpvMrcmy5pZrNK1lt4xCsGvpyWQ/VVv6QD
 github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
 github.com/golang/snappy v0.0.0-20170215233205-553a64147049/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
+github.com/gomarkdown/markdown v0.0.0-20200824053859-8c8b3816f167 h1:LP/6EfrZ/LyCc+SXvANDrIJ4sP9u2NAtqyv6QknetNQ=
+github.com/gomarkdown/markdown v0.0.0-20200824053859-8c8b3816f167/go.mod h1:aii0r/K0ZnHv7G0KF7xy1v0A7s2Ljrb5byB7MO5p6TU=
 github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/btree v1.0.0/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/go-cmp v0.1.1-0.20171103154506-982329095285/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
@@ -518,6 +520,7 @@ go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=
 go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/multierr v1.1.0/go.mod h1:wR5kodmAFQ0UK8QlbwjlSNy0Z68gJhDJUG5sjR94q/0=
 go.uber.org/zap v1.10.0/go.mod h1:vwi/ZaCAaUcBkycHslxD9B2zi4UTXhF60s6SWpuDF0Q=
+golang.org/dl v0.0.0-20190829154251-82a15e2f2ead/go.mod h1:IUMfjQLJQd4UTqG1Z90tenwKoCX93Gn3MAQJMOSBsDQ=
 golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20181029021203-45a5f77698d3/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=

src/routes/artifact.go

@@ -15,6 +15,10 @@ import (
 	"github.com/gorilla/mux"
 	"sour.is/x/toolbox/httpsrv"
 	"sour.is/x/toolbox/log"
+
+	"github.com/gomarkdown/markdown"
+	"github.com/gomarkdown/markdown/html"
+	"github.com/gomarkdown/markdown/parser"
 )
 
 func init() {
@@ -78,7 +82,7 @@ func (a *Artifact) get(w http.ResponseWriter, r *http.Request) {
 
 	f, err := os.Open(fname)
 	if err != nil {
-		log.Fatal(err)
+		log.Error(err)
 	}
 	defer f.Close()
 
@@ -107,7 +111,7 @@ func (a *Artifact) get(w http.ResponseWriter, r *http.Request) {
 	}
 
 	tr := tar.NewReader(rdr)
-	if path == "..." {
+	if path == "@" {
 		var paths []string
 		for {
 			hdr, err := tr.Next()
@@ -115,7 +119,7 @@ func (a *Artifact) get(w http.ResponseWriter, r *http.Request) {
 				break // End of archive
 			}
 			if err != nil {
-				log.Fatal(err)
+				log.Error(err)
 			}
 			paths = append(paths, hdr.Name)
 		}
@@ -130,9 +134,37 @@ func (a *Artifact) get(w http.ResponseWriter, r *http.Request) {
 			break // End of archive
 		}
 		if err != nil {
-			log.Fatal(err)
+			log.Error(err)
 		}
+		if path == "~" && hdr.Name == "index.html" {
+			path = hdr.Name
+		}
+		if path == "~" && hdr.Name == "index.md" {
+			path = hdr.Name
+		}
+
 		if hdr.Name == path {
+			if strings.HasSuffix(hdr.Name, ".md") {
+				md, err := ioutil.ReadAll(tr)
+				if err != nil {
+					httpsrv.WriteError(w, http.StatusInternalServerError, err.Error())
+					return
+				}
+
+				w.Header().Set("Content-Type", "text/html")
+				extensions := parser.CommonExtensions | parser.AutoHeadingIDs
+				p := parser.NewWithExtensions(extensions)
+
+				htmlFlags := html.CommonFlags | html.HrefTargetBlank
+				opts := html.RendererOptions{Flags: htmlFlags}
+				renderer := html.NewRenderer(opts)
+
+				b := markdown.ToHTML(md, p, renderer)
+				w.Write(b)
+				w.WriteHeader(http.StatusOK)
+				return
+			}
+
 			pr := NewPreviewReader(tr)
 
 			mime, err := ReadMIME(pr, hdr.Name)
@@ -143,7 +175,7 @@ func (a *Artifact) get(w http.ResponseWriter, r *http.Request) {
 			w.Header().Set("Content-Type", mime)
 
 			if _, err := io.Copy(w, pr.Drain()); err != nil {
-				log.Fatal(err)
+				log.Error(err)
 			}
 			w.WriteHeader(http.StatusOK)
 			return