Add directions and fix emdbed

Signed-off-by: jolheiser <john.olheiser@gmail.com>

README.md

@@ -2,6 +2,20 @@
 
 A simple blog tool.
 
+Supports [emdbed](https://git.jojodev.com/jolheiser/emdbed).
+
+Point `blog` at a directory with blog post markdown files. Each markdown file (or directory with an `index.md` inside) will be converted to a blog post.
+
+Each post must contain some TOML metadata as follows:
+
+<!-- emdbed: _example/test/index.md ~toml L2 L4 -->
+```toml
+title = "Test"
+date = 2021-10-01
+tags = ["test", "example"]
+```
+<!-- /emdbed -->
+
 ## License
 
 [MIT](LICENSE)

markdown/markdown.go

@@ -3,9 +3,6 @@ package markdown
 import (
 	"bytes"
 	"io"
-	"strings"
-
-	"go.jolheiser.com/emdbed"
 
 	chromahtml "github.com/alecthomas/chroma/formatters/html"
 	"github.com/yuin/goldmark"
@@ -38,17 +35,13 @@ var gm = goldmark.New(
 )
 
 // Convert transforms a markdown document into HTML
-func Convert(baseDir string, r io.Reader) (string, error) {
-	content, err := Content(r)
-	if err != nil {
-		return "", err
-	}
-	content, err = emdbed.Convert(baseDir, strings.NewReader(content))
+func Convert(r io.Reader) (string, error) {
+	content, err := io.ReadAll(r)
 	if err != nil {
 		return "", err
 	}
 	var buf bytes.Buffer
-	if err := gm.Convert([]byte(content), &buf); err != nil {
+	if err := gm.Convert(content, &buf); err != nil {
 		return "", err
 	}
 	return buf.String(), nil

readme.go

@@ -0,0 +1,20 @@
+//go:build generate
+
+package main
+
+import (
+	"os"
+
+	"go.jolheiser.com/emdbed"
+)
+
+//go:generate go run readme.go
+func main() {
+	convert, err := emdbed.ConvertFile("README.md")
+	if err != nil {
+		panic(err)
+	}
+	if err := os.WriteFile("README.md", []byte(convert), os.ModePerm); err != nil {
+		panic(err)
+	}
+}

router/router.go

@@ -4,6 +4,10 @@ import (
 	"html/template"
 	"net/http"
 	"os"
+	"path/filepath"
+	"strings"
+
+	"go.jolheiser.com/emdbed"
 
 	"go.jolheiser.com/blog/markdown"
 	"go.jolheiser.com/blog/post"
@@ -53,7 +57,21 @@ func fileHandler(blog *post.Blog) http.HandlerFunc {
 		}
 		defer fi.Close()
 
-		md, err := markdown.Convert(blog.Path, fi)
+		mdContent, err := markdown.Content(fi)
+		if err != nil {
+			log.Error().Err(err).Msg("could not get content")
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+
+		emdbedContent, err := emdbed.Convert(filepath.Dir(p.Path), strings.NewReader(mdContent))
+		if err != nil {
+			log.Error().Err(err).Msg("could not emdbed")
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+
+		md, err := markdown.Convert(strings.NewReader(emdbedContent))
 		if err != nil {
 			log.Error().Err(err).Msg("could not convert")
 			http.Error(w, err.Error(), http.StatusInternalServerError)