From: Sergey Matveev <stargrave@stargrave.org>
Date: Sun, 12 Jan 2020 15:31:51 +0000 (+0300)
Subject: Fix working with initial commit
X-Git-Tag: v0.0.2^0
X-Git-Url: http://www.git.stargrave.org/?a=commitdiff_plain;h=6bdf29e2d457bb3d67237901e5892fcb91c435c3;p=sgblog.git

Fix working with initial commit
---

diff --git a/cmd/sgblog/main.go b/cmd/sgblog/main.go
index 39641ab..0987bac 100644
--- a/cmd/sgblog/main.go
+++ b/cmd/sgblog/main.go
@@ -49,8 +49,8 @@ const (
 )
 
 var (
-	Version      = "0.0.1"
-	ETagVersion  = []byte("1")
+	Version      = "0.0.2"
+	ETagVersion  = []byte("2")
 	sha1DigestRe = regexp.MustCompilePOSIX("([0-9a-f]{40,40})")
 	defaultLinks = []string{}
 	repo         *git.Repository
@@ -445,15 +445,23 @@ func main() {
 		title := lines[0]
 		when := commit.Author.When.Format(WhenFmt)
 		os.Stdout.Write([]byte(startHeader(etagHash, gzipWriter != nil)))
-		parent := commit.ParentHashes[0].String()
-		out.Write([]byte(startHTML(fmt.Sprintf("%s (%s)", title, when), []string{
-			fmt.Sprintf(`<link rel="prev" href="%s" title="older">`, "/"+parent),
-		})))
-		out.Write([]byte(fmt.Sprintf(
-			"[%s]&nbsp;[<tt>%s</tt>]\n<hr/>\n",
-			makeA(urlPrefix+"/"+parent, "older"),
-			when,
-		)))
+		links := []string{}
+		var parent string
+		if len(commit.ParentHashes) > 0 {
+			parent = commit.ParentHashes[0].String()
+			links = append(links, fmt.Sprintf(
+				`<link rel="prev" href="%s" title="older">`,
+				urlPrefix+"/"+parent,
+			))
+		}
+		out.Write([]byte(startHTML(fmt.Sprintf("%s (%s)", title, when), links)))
+		if parent != "" {
+			out.Write([]byte(fmt.Sprintf(
+				"[%s]&nbsp;[<tt>%s</tt>]\n<hr/>\n",
+				makeA(urlPrefix+"/"+parent, "older"),
+				when,
+			)))
+		}
 		out.Write([]byte(fmt.Sprintf("<h2>%s</h2>\n<pre>\n", title)))
 		for _, line := range lines[2:] {
 			line = strings.ReplaceAll(line, "&", "&amp;")