fix errors from missed changes

main.go

@@ -13,6 +13,7 @@ import (
 	"path/filepath"
 	"sync"
 	"time"
+	"errors"
 
 	"github.com/go-git/go-git/v5"
 	"github.com/go-git/go-git/v5/config"
@@ -23,23 +24,40 @@ import (
 
 const DefaultRemoteName = "pad-archiver"
 
-var commitmu sync.Mutex
+var (
+	NothingToDo = errors.New("Nothing to do for unmodified file")
+)
 
-func commit(
+var Commitmu sync.Mutex
+
+
+func Commit(
 	tree *git.Worktree,
 	padfile string,
 	url string,
 ) (plumbing.Hash, error) {
-	commitmu.Lock()
-	defer commitmu.Unlock()
+	Commitmu.Lock()
+	defer Commitmu.Unlock()
+
+	status, err := tree.Status()
+	if err != nil {
+		return plumbing.ZeroHash, fmt.Errorf("Failed to get status of %s", padfile)
+	}
 
 	if _, err := tree.Add(padfile); err != nil {
 		return plumbing.ZeroHash, fmt.Errorf("Failed to stage %s: %w", padfile, err)
 	}
 
+	fileStatus := status.File(padfile)
+	if fileStatus.Staging == git.Unmodified ||
+	   fileStatus.Staging == git.Untracked {
+		return plumbing.ZeroHash, NothingToDo
+	}
+
 	commit, err := tree.Commit(
 		fmt.Sprintf("Updated %s from %s", padfile, url),
 		&git.CommitOptions{
+			All: false,
 			Author: &object.Signature {
 				Name: "Pad Archiver",
 				Email: "pad-archiver@dadada.li",
@@ -55,41 +73,32 @@ func commit(
 	return commit, nil
 }
 
-func update(
-	tree *git.Worktree,
+func Download(
+	gitdir string,
 	url string,
-) (plumbing.Hash, error) {
+) (string, error) {
 	res, err := http.Get(url + "/export/txt")
 	if err != nil {
-		return plumbing.ZeroHash, fmt.Errorf("Failed to get pad at %s: %w", url, err)
+		return "", fmt.Errorf("Failed to get pad at %s: %w", url, err)
 	}
 
 	defer res.Body.Close()
 
 	padfile := path.Base(url) + ".txt"
 
-	padpath := filepath.Join(tree.Filesystem.Root(), padfile)
+	padpath := filepath.Join(gitdir, padfile)
 	out, err := os.Create(padpath)
 
 	written, err := io.Copy(out, res.Body)
 	if err != nil {
-		return plumbing.ZeroHash, fmt.Errorf("Failed to write pad to file at %s: %w", padfile, err)
+		return "", fmt.Errorf("Failed to write pad to file at %s: %w", padfile, err)
 	}
 
 	if written < 100 {
-		return plumbing.ZeroHash, fmt.Errorf("Skipping update of %s, because pad has likely been removed from %s", padfile, url)
+		return "", fmt.Errorf("Skipping update of %s, because pad has likely been removed from %s", padfile, url)
 	}
 
-	status, err := tree.Status()
-	if err != nil {
-		return plumbing.ZeroHash, fmt.Errorf("Failed to get status of %s: %w", padfile, err)
-	}
-
-	if status.IsClean() {
-		return plumbing.ZeroHash, fmt.Errorf("No changes recorded for %s", url)
-	}
-
-	return commit(tree, padfile, url)
+	return padfile, nil
 }
 
 
@@ -161,6 +170,7 @@ func main() {
 		log.Fatalf("Failed to open git worktree %s", err)
 	}
 
+	filesystemRoot := tree.Filesystem.Root()
 	scanner := bufio.NewScanner(os.Stdin)
 
 	var wg sync.WaitGroup
@@ -170,16 +180,27 @@ func main() {
 
 		go func() {
 			defer wg.Done()
-			if _, err := update(tree, padurl); err != nil {
+			padfile, err := Download(filesystemRoot, padurl)
+			if err != nil {
 				log.Printf("%s", err)
+
+				return
+			}
+			log.Printf("Downloaded %s", padurl)
+			if _, err := Commit(tree, padfile, *remote); err != nil {
+				if err == NothingToDo {
+					log.Printf("Nothing to do for %s", padfile)
+				} else {
+					log.Fatalf("%s", err)
+				}
 			} else {
-				log.Printf("Updated %s", padurl)
+				log.Printf("Committed %s", padfile)
 			}
 		}()
 	}
 	wg.Wait()
 
-	tree.Clean(&git.CleanOptions{})
+	tree.Clean(&git.CleanOptions{Dir: true})
 
 	if *push == true {
 		auth := &githttp.BasicAuth{