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Go
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import ( "fmt" "strings" "time"
"tangled.org/core/types")
// renderUnifiedDiff reconstructs a unified diff from a NiceDiff.func renderUnifiedDiff(nd *types.NiceDiff) string { if nd == nil { return "" } var sb strings.Builder for _, d := range nd.Diff { oldName := d.Name.Old newName := d.Name.New if oldName == "" { oldName = newName } if newName == "" { newName = oldName }
fmt.Fprintf(&sb, "diff --git a/%s b/%s\n", oldName, newName) switch { case d.IsNew: fmt.Fprintf(&sb, "new file mode 100644\n") fmt.Fprintf(&sb, "--- /dev/null\n") fmt.Fprintf(&sb, "+++ b/%s\n", newName) case d.IsDelete: fmt.Fprintf(&sb, "deleted file mode 100644\n") fmt.Fprintf(&sb, "--- a/%s\n", oldName) fmt.Fprintf(&sb, "+++ /dev/null\n") case d.IsRename: fmt.Fprintf(&sb, "rename from %s\n", oldName) fmt.Fprintf(&sb, "rename to %s\n", newName) fmt.Fprintf(&sb, "--- a/%s\n", oldName) fmt.Fprintf(&sb, "+++ b/%s\n", newName) default: fmt.Fprintf(&sb, "--- a/%s\n", oldName) fmt.Fprintf(&sb, "+++ b/%s\n", newName) }
for i := range d.TextFragments { sb.WriteString(d.TextFragments[i].String()) } } return sb.String()}
// renderFormatPatch reconstructs an email-style format-patch from a NiceDiff.func renderFormatPatch(nd *types.NiceDiff) string { if nd == nil { return "" } c := nd.Commit
// subject: first line of commit message subject := c.Message if i := strings.IndexByte(subject, '\n'); i >= 0 { subject = subject[:i] }
// body: rest of message after first line body := "" if i := strings.Index(c.Message, "\n\n"); i >= 0 { body = strings.TrimRight(c.Message[i+2:], "\n") }
date := c.Author.When.UTC().Format(time.RFC1123Z)
var sb strings.Builder fmt.Fprintf(&sb, "From %s Mon Sep 17 00:00:00 2001\n", c.Hash.String()) fmt.Fprintf(&sb, "From: %s <%s>\n", c.Author.Name, c.Author.Email) fmt.Fprintf(&sb, "Date: %s\n", date) fmt.Fprintf(&sb, "Subject: [PATCH] %s\n", subject) sb.WriteString("\n") if body != "" { sb.WriteString(body) sb.WriteString("\n") } sb.WriteString("---\n")
// stat summary for _, d := range nd.Diff { name := d.Name.New if name == "" { name = d.Name.Old } stats := d.Stats() fmt.Fprintf(&sb, " %s | %d %s\n", name, stats.Insertions+stats.Deletions, strings.Repeat("+", int(stats.Insertions))+strings.Repeat("-", int(stats.Deletions))) } fmt.Fprintf(&sb, " %d file(s) changed, %d insertion(s)(+), %d deletion(s)(-)\n\n", nd.Stat.FilesChanged, nd.Stat.Insertions, nd.Stat.Deletions)
sb.WriteString(renderUnifiedDiff(nd)) sb.WriteString("\n--\ntangled.sh\n") return sb.String()}