Adds diffstat to commit template and limit flag to the repo command

README.md

@@ -21,7 +21,7 @@ Project heavily inspired by the amazing
 - [ ] Add a subcommand to dump the embedded templates so they can be
       modified.
 - [ ] Take binary files into account.
-- [ ] Limit the output for large diffs. Add a "X commits remaining"
+- [X] Limit the output for large diffs. Add a "X commits remaining"
       message if necessary.
 - [ ] Generate files in temporal directory and replace the final one
       when everything is ready.

cmd.go

@@ -14,7 +14,7 @@ type repoCmd struct {
 }
 
 func (r *repoCmd) Run() error {
-	return generateRepo(r.Path)
+	return generateRepo(r.Path, r.LogLimit)
 }
 
 var cli struct {

gitssg.go

@@ -3,8 +3,10 @@ package main
 import (
 	"bytes"
 	"embed"
+	"errors"
 	"fmt"
 	"html/template"
+	"io"
 	"log/slog"
 	"os"
 	"path/filepath"
@@ -42,6 +44,14 @@ type CommitFile struct {
 	Size     int64
 }
 
+type FileStats struct {
+	Name  string
+	Mode  string // ToDo: is the name correct here?
+	Adds  int
+	Dels  int
+	Total int
+}
+
 type CommitInfo struct {
 	Hash        string
 	ParentHash  string
@@ -52,6 +62,7 @@ type CommitInfo struct {
 	Files       int
 	Adds        int
 	Dels        int
+	FileStats   []*FileStats
 }
 
 //go:embed templates
@@ -90,6 +101,9 @@ var funcMap = template.FuncMap{
 	"timeLongFormat": func(t time.Time) string {
 		return t.Format(timeLongFormatStr)
 	},
+	"repeatStr": func(s string, n int) string {
+		return strings.Repeat(s, n)
+	},
 }
 
 func executeTemplate(name string, data any) ([]byte, error) {
@@ -205,8 +219,8 @@ func generateIndex(args []string) error {
 	return nil
 }
 
-func generateRepo(path string) error {
+func generateRepo(path string, logLimit int) error {
-	slog.Debug("Generating repository", "path", path)
+	slog.Debug("Generating repository", "path", path, "logLimit", logLimit)
 
 	repoInfo := &RepoInfo{Name: strings.TrimSuffix(filepath.Base(path), ".git")}
 
@@ -321,7 +335,6 @@ func generateRepo(path string) error {
 	}
 
 	// generate the files index file
-	// ToDo: bundle execute and write into a function
 	filesData := map[string]any{"repoInfo": repoInfo, "files": files, "relpath": ""}
 	filesDstpath := filepath.Join(repoInfo.Name, "files.html")
 	if err := executeTemplateToFile("files", filesData, filesDstpath); err != nil {
@@ -334,23 +347,52 @@ func generateRepo(path string) error {
 		return fmt.Errorf("cannot get git log for repository: %w", err)
 	}
 
+	i := 0
+	remaining := 0
 	commits := []*CommitInfo{}
-	ciErr := cIter.ForEach(func(c *object.Commit) error {
+	for {
+		i++
+		c, err := cIter.Next()
+		if errors.Is(err, io.EOF) {
+			break
+		}
+		if err != nil {
+			return fmt.Errorf("cannot get next commit while processing log: %w", err)
+		}
+
 		slog.Debug("Processing commit", "hash", c.Hash)
 
+		if i > logLimit {
+			remaining++
+			slog.Debug("Limit reached while processing log", "iteration", i, "remaining", remaining)
+			continue
+		}
+
 		// ToDo: is this the best way to get the number of files?
 		fstats, err := c.Stats()
 		if err != nil {
 			return fmt.Errorf("cannot get commit stats %s: %w", c.Hash, err)
 		}
 
+		fileStats := make([]*FileStats, len(fstats))
+		for i, fs := range fstats {
+			fileStats[i] = &FileStats{
+				Name:  fs.Name,
+				Mode:  "",
+				Adds:  fs.Addition,
+				Dels:  fs.Deletion,
+				Total: fs.Addition + fs.Deletion,
+			}
+		}
+
 		commit := &CommitInfo{
 			Hash:        c.Hash.String(),
 			Date:        c.Author.When, // ToDo: author when vs commiter when?
 			Msg:         c.Message,
 			AuthorName:  c.Author.Name,
 			AuthorEmail: c.Author.Email,
-			Files:       len(fstats),
+			Files:       len(fstats), // ToDo: call len on FileStats
+			FileStats:   fileStats,
 		}
 
 		if parent, _ := c.Parent(0); parent != nil {
@@ -371,14 +413,14 @@ func generateRepo(path string) error {
 		if err := executeTemplateToFile("commit", data, dstpath); err != nil {
 			return fmt.Errorf("cannot execute template %q to file %q: %w", "commit", dstpath, err)
 		}
-
-		return nil
-	})
-	if ciErr != nil {
-		return fmt.Errorf("error while processing log: %w", ciErr)
 	}
 
-	logData := map[string]any{"repoInfo": repoInfo, "commits": commits, "relpath": ""}
+	logData := map[string]any{
+		"repoInfo":  repoInfo,
+		"commits":   commits,
+		"relpath":   "",
+		"remaining": remaining,
+	}
 	logDstpath := filepath.Join(repoInfo.Name, "log.html")
 	if err := executeTemplateToFile("log", logData, logDstpath); err != nil {
 		return fmt.Errorf("cannot execute template %q to file %q: %w", "file", logDstpath, err)

templates/commit.html.tmpl

@@ -41,20 +41,15 @@
 {{.commit.Msg}}
 <b>Diffstat:</b>
 <table>
+  {{range $i, $fs := .commit.FileStats}}
   <tr>
-    <td class="M">M</td>
+    <td class="{{$fs.Mode}}">{{$fs.Mode}}</td>
-    <td><a href="#h0">stagit-index.c</a></td>
+    <td><a href="#h{{$i}}">{{$fs.Name}}</a></td>
     <td> | </td>
-    <td class="num">2</td>
+    <td class="num">{{$fs.Total}}</td>
-    <td><span class="i">+</span><span class="d">-</span></td>
+    <td>{{if gt $fs.Adds 0}}<span class="i">{{repeatStr "+" $fs.Adds}}</span>{{end}}{{if gt $fs.Dels 0}}<span class="d">{{repeatStr "-" $fs.Dels}}</span>{{end}}</td>
-  </tr>
-  <tr>
-    <td class="M">M</td>
-    <td><a href="#h1">stagit.c</a></td>
-    <td> | </td>
-    <td class="num">2</td>
-    <td><span class="i">+</span><span class="d">-</span></td>
   </tr>
+  {{end}}
 </table></pre><pre>{{.commit.Files}} file{{if ne .commit.Files 1}}s{{end}} changed, {{.commit.Adds}} insertion{{if ne .commit.Adds 1}}s{{end}}(+), {{.commit.Dels}} deletion{{if ne .commit.Dels 1}}s{{end}}(-)
 <hr/><b>diff --git a/<a id="h0" href="../file/stagit-index.c.html">stagit-index.c</a> b/<a href="../file/stagit-index.c.html">stagit-index.c</a></b>
 <a href="#h0-0" id="h0-0" class="h">@@ -179,7 +179,7 @@ main(int argc, char *argv[])

templates/log.html.tmpl

@@ -54,6 +54,9 @@
             <td class="num" align="right">-{{.Dels}}</td>
           </tr>
           {{- end}}
+          {{if ne .remaining 0}}
+          <tr><td></td><td colspan="5">{{.remaining}} more commit{{if ne .remaining 1}}s{{end}} remaining, fetch the repository</td></tr>
+          {{end}}
     </tbody></table></div>
   </body>
 </html>