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package projects
import (
"bytes"
"github.com/libgit2/git2go"
"html"
"html/template"
"io"
"log"
"os"
"os/exec"
"path"
"strings"
)
type ReadmeFormat string
const (
ReadmeMarkdown ReadmeFormat = "markdown"
ReadmePlain ReadmeFormat = "plain"
)
func (f ReadmeFormat) Format(raw []byte) template.HTML {
switch f {
case ReadmeMarkdown:
return formatMarkdown(raw)
default:
return template.HTML("<pre><code>" + html.EscapeString(string(raw)) + "</code></pre>")
}
}
func formatMarkdown(raw []byte) template.HTML {
p := exec.Command("markdown")
buf := new(bytes.Buffer)
p.Stdin = bytes.NewReader(raw)
p.Stdout = buf
if err := p.Run(); err != nil {
log.Printf("Failed formatting markdown readme: %s", err)
return "<strong>Failed formatting markdown :(</strong>"
}
return template.HTML(buf.Bytes())
}
func gitReadme(gitpath string) (raw []byte, name string, err error) {
repo, err := git.OpenRepository(gitpath)
if err != nil {
return raw, name, err
}
master_tree_obj, err := repo.RevparseSingle("master:") // Root tree of commit at top of master
if err != nil {
return raw, name, err
}
master_tree, err := master_tree_obj.AsTree()
if err != nil {
return raw, name, err
}
var inner_err error = nil
err = master_tree.Walk(func(_ string, entry *git.TreeEntry) int {
if !(strings.HasPrefix(strings.ToLower(entry.Name), "readme") && entry.Type == git.ObjectBlob) {
return 1
}
name = entry.Name
blob, err := repo.LookupBlob(entry.Id)
if err == nil {
raw = blob.Contents()
} else {
inner_err = err
}
return -1
})
if err == nil && inner_err != nil {
err = inner_err
}
return
}
func (p *Project) formatReadme() {
readme_name := ""
var readme_raw []byte
if p.ReadmePath != "" {
fullpath := p.ReadmePath
if !path.IsAbs(fullpath) {
fullpath = path.Join(p.dir, fullpath)
}
fullpath = path.Clean(fullpath)
f, err := os.Open(fullpath)
if err != nil {
log.Printf("Could not get readme for %s: failed opening %s: %s", p.Name, fullpath, err)
return
}
defer f.Close()
buf := new(bytes.Buffer)
if _, err := io.Copy(buf, f); err != nil {
log.Printf("Could not get readme for %s: failed reading %s: %s", p.Name, fullpath, err)
return
}
readme_raw = buf.Bytes()
readme_name = fullpath
} else if len(p.Git) > 0 {
var err error
readme_raw, readme_name, err = gitReadme(p.Git)
if err != nil {
log.Printf("Could not get readme for %s from git: %s", p.Name, err)
return
}
if readme_name == "" {
return
}
} else {
return
}
format := ReadmePlain
switch strings.ToLower(path.Ext(readme_name)) {
case ".md", ".mkd", ".markdown":
format = ReadmeMarkdown
}
p.FormattedReadme = format.Format(readme_raw)
}
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