add option --readme-index

Author: kpym

Diff for: gm_build.go

@@ -42,7 +42,15 @@ func buildMd(infile string) {
 	if infile == "" {
 		os.Stdout.Write(html)
 	} else {
-		outfile := filepath.Join(outdir, infile[:len(infile)-3]+".html")
+		var outfile string
+
+		if readme && strings.ToLower(filepath.Base(infile)) == "readme.md" {
+			// if it is a README.md file, we want to name it index.html
+			outfile = filepath.Join(outdir, infile[:len(infile)-9]+"index.html")
+		} else {
+			// otherwise we just change the extension
+			outfile = filepath.Join(outdir, infile[:len(infile)-3]+".html")
+		}
 		if os.MkdirAll(filepath.Dir(outfile), os.ModePerm) != nil {
 			check(err, "Problem to reach/create folder:", filepath.Dir(outfile))
 		}

Diff for: gm_parameters.go

@@ -55,6 +55,7 @@ var (
 	// build flags
 	outdir     string
 	inpatterns []string
+	readme     bool
 
 	// template flags
 	css        string
@@ -111,6 +112,7 @@ func SetParameters() {
 	pflag.StringVar(&htmlshell, "html", "", "The html template (file or string).")
 
 	pflag.StringVarP(&outdir, "out-dir", "o", "", "The build output folder (created if not already existing, not used when serving).")
+	pflag.BoolVar(&readme, "readme-index", false, "Compile README.md to index.html (not used when serving).")
 	pflag.BoolVar(&localmdlinks, "links-md2html", true, "Replace .md with .html in links to local files (not used when serving).")
 
 	pflag.BoolVar(&attribute, "gm-attribute", true, "goldmark option: allows to define attributes on some elements.")