store go.mod and go.sum in git. thank you most excellent git devs

README.md

@@ -7,6 +7,7 @@ needs to be done sometimes.
 
 * go-mod-clean tries to remove uneeded entries from the go.sum file.
 * You must run go-mod-clean in ~/go/src for this to work.
+* stores go.mod and go.sum with `autogen:go.mod` tags in 'git notes'
 
 # Install go-mod-clean
 

main.go

@@ -2,9 +2,7 @@ package main
 
 import (
 	"errors"
-	"fmt"
 	"os"
-	"path/filepath"
 	"strings"
 
 	"go.wit.com/dev/alexflint/arg"
@@ -43,8 +41,11 @@ func main() {
 	// skip restore if --force
 	if !argv.Force {
 		// try to restore from the git metadata
-		if restoreFromGit(check) {
-			okExit("go.mod was restored from the git notes")
+		if err := check.AutogenRestore(); err != nil {
+			badExit(err)
+		}
+		if err := check.ValidGoSum(); err == nil {
+			okExit("go.mod and go.sum were restored ok")
 		}
 	}
 
@@ -118,76 +119,16 @@ func badExit(err error) {
 	os.Exit(-1)
 }
 
-// todo: do this the right way in git
 func saveAsMetadata(repo *gitpb.Repo) error {
 	cname := check.GetCurrentBranchName()
-	cmd := []string{"git", "notes", "remove", cname}
-	if err := check.StrictRun(cmd); err != nil {
-		return err
-	}
-	cmd = []string{"git", "notes", "add", "-m", "// `autogen:go.mod`", cname}
-	if err := check.StrictRun(cmd); err != nil {
-		return err
-	}
 	if check.GoPrimitive {
-		cmd = []string{"git", "notes", "append", "-F", "go.mod", cname}
-		if err := check.StrictRun(cmd); err != nil {
+		if err := check.AutogenSave([]string{"go.mod"}, cname, true); err != nil {
 			return err
 		}
 	} else {
-		cmd = []string{"git", "notes", "append", "-F", "go.mod", cname}
-		if err := check.StrictRun(cmd); err != nil {
-			return err
-		}
-		cmd = []string{"git", "notes", "append", "-m", "// `autogen:go.sum`", cname}
-		if err := check.StrictRun(cmd); err != nil {
-			return err
-		}
-		cmd = []string{"git", "notes", "append", "-F", "go.sum", cname}
-		if err := check.StrictRun(cmd); err != nil {
+		if err := check.AutogenSave([]string{"go.mod", "go.sum"}, cname, true); err != nil {
 			return err
 		}
 	}
 	return nil
 }
-
-func restoreFromGit(repo *gitpb.Repo) bool {
-	result := repo.Run([]string{"git", "notes", "show"})
-	if result.Exit != 0 {
-		return false
-	}
-	if result.Error != nil {
-		return false
-	}
-	if len(result.Stdout) == 0 {
-		return false
-	}
-
-	var newf *os.File
-	var body string
-	for _, line := range result.Stdout {
-		if strings.HasPrefix(line, "// `autogen:") {
-			if newf != nil {
-				fmt.Fprintln(newf, strings.TrimSpace(body))
-				newf.Close()
-				newf = nil
-				body = ""
-			}
-			fbase := strings.TrimPrefix(line, "// `autogen:")
-			fbase = strings.TrimSpace(fbase)
-			fbase = strings.TrimSuffix(fbase, "`")
-			// if line == // `autogen:`  , then the filename is blank
-			if fbase != "" {
-				fname := filepath.Join(filepath.Join(check.FullPath, fbase))
-				newf, _ = os.OpenFile(fname, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0644)
-			}
-			continue
-		}
-		body += line + "\n"
-	}
-	if newf != nil {
-		fmt.Fprintln(newf, strings.TrimSpace(body))
-		newf.Close()
-	}
-	return true
-}