Return error from Save method

file.go

@@ -3,6 +3,7 @@ package main
 import (
 	"bufio"
 	"bytes"
+	"fmt"
 	"github.com/sergi/go-diff/diffmatchpatch"
 	"html"
 	"html/template"
@@ -37,35 +38,32 @@ func (fp *FilePages) Get(p string) Page {
 	return Page{Content: string(body)}
 }
 
-func (fp *FilePages) Save(p string, page Page, summary, author string) {
+func (fp *FilePages) Save(p string, page Page, summary, author string) error {
 	f, err := os.Create(filepath.Join(fp.dirname, strings.Replace(p, " ", "_", -1)))
 	if err != nil {
-		return
+		return err
 	}
 	defer f.Close()
 	f.WriteString(strings.Replace(page.Content, "\r\n", "\n", -1))
 
-	saveWithGit(fp, p, summary, author)
-
-	return
+	return saveWithGit(fp, p, summary, author)
 }
 
-func saveWithGit(fp *FilePages, p string, summary, author string) {
+func saveWithGit(fp *FilePages, p string, summary, author string) error {
 	cmd := exec.Command("git", "add", ".")
 	cmd.Dir = fp.dirname
 	err := cmd.Run()
 	if err != nil {
-		log.Println(err)
-		return
+		return fmt.Errorf("while adding page %s: %s", p, err)
 	}
 
 	cmd = exec.Command("git", "commit", "-m", "Changes to "+p+" by "+author+"\n\n"+summary)
 	cmd.Dir = fp.dirname
 	err = cmd.Run()
 	if err != nil {
-		log.Println(err)
-		return
+		return fmt.Errorf("while commiting page %s: %s", p, err)
 	}
+	return nil
 }
 
 func (fp *FilePages) Exist(p string) bool {

main.go

@@ -47,7 +47,7 @@ type Change struct {
 
 type PagesRepository interface {
 	Get(p string) Page
-	Save(p string, page Page, summary, author string)
+	Save(p string, page Page, summary, author string) error
 	Exist(p string) bool
 	PageHistory(p string) ([]Revision, error)
 	RecentChanges() ([]Change, error)
@@ -78,7 +78,7 @@ type recentPage struct {
 	Session *Session
 	Title   string
 	Name    string
-	Recent []Change
+	Recent  []Change
 }
 
 type indexHandler struct{}
@@ -264,7 +264,11 @@ func (h *saveHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	page := r.PostForm.Get("p")
 	summary := r.PostForm.Get("summary")
 
-	mp.Save(page, Page{Content: r.PostForm.Get("content")}, summary, sess.Me)
+	pageData := Page{Content: r.PostForm.Get("content")}
+	err = mp.Save(page, pageData, summary, sess.Me)
+	if err != nil {
+		log.Println(err)
+	}
 	http.Redirect(w, r, "/"+page, http.StatusFound)
 }
 
@@ -401,7 +405,7 @@ func (h *recentHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		Session: sess,
 		Title:   "Recent changes",
 		Name:    "Recent changes",
-		Recent: changes,
+		Recent:  changes,
 	})
 	if err != nil {
 		http.Error(w, err.Error(), 500)