new rev-upgrade script

Signed-off-by: kuba-- <[email protected]>

cmd/tools/rev-upgrade/main.go

@@ -0,0 +1,187 @@
+package main
+
+import (
+	"bytes"
+	"flag"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"log"
+	"os/exec"
+	"path/filepath"
+	"regexp"
+	"sync"
+
+	"github.com/BurntSushi/toml"
+	git "gopkg.in/src-d/go-git.v4"
+)
+
+type project struct {
+	Name     string
+	Revision string
+}
+
+type projects struct {
+	Projects []project
+}
+
+func init() {
+	flag.Usage = func() {
+		fmt.Println("\ngo run ./tools/rev-upgrade/main.go [-p \"project name\"] [-r \"revision\"]")
+		flag.PrintDefaults()
+	}
+}
+
+func main() {
+	var (
+		prj    string
+		newRev string
+		oldRev string
+
+		w   *git.Worktree
+		err error
+	)
+
+	flag.StringVar(&prj, "p", "gopkg.in/src-d/go-mysql-server.v0", "project name (e.g.: gopkg.in/src-d/go-mysql-server.v0)")
+	flag.StringVar(&newRev, "r", "", "revision (by default the latest allowed by Gopkg.toml)")
+	flag.Parse()
+
+	if prj == "" {
+		log.Fatalln("Project's name cannot be an empty string")
+	}
+
+	w, err = worktree()
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	oldRev, err = revision(filepath.Join(w.Filesystem.Root(), "Gopkg.lock"), prj)
+	if err != nil {
+		log.Fatalf("Current revision of %s is an empty string (%s)", prj, err)
+	}
+
+	if oldRev == newRev {
+		return
+	}
+
+	defer func() {
+		if err != nil {
+			log.Println(err)
+			w.Reset(&git.ResetOptions{Mode: git.MixedReset})
+		} else {
+			// let commit manually
+		}
+	}()
+
+	if newRev != "" {
+		fmt.Printf("Project: %s\nOld rev: %s\nNew rev: %s\n", prj, oldRev, newRev)
+
+		if err = replace(w, oldRev, newRev); err != nil {
+			return
+		}
+	}
+
+	err = ensure(prj)
+	if err != nil {
+		return
+	}
+
+	if newRev == "" {
+		newRev, err = revision(filepath.Join(w.Filesystem.Root(), "Gopkg.lock"), prj)
+		fmt.Printf("Project: %s\nOld rev: %s\nNew rev: %s\n", prj, oldRev, newRev)
+		if newRev == oldRev {
+			return
+		}
+
+		if err = replace(w, oldRev, newRev); err != nil {
+			return
+		}
+	}
+}
+
+// repo's worktree
+func worktree() (*git.Worktree, error) {
+	repo, err := git.PlainOpenWithOptions(".", &git.PlainOpenOptions{DetectDotGit: true})
+	if err != nil {
+		return nil, err
+	}
+
+	return repo.Worktree()
+}
+
+// project's current revision
+func revision(gopkg string, prj string) (string, error) {
+	data, err := ioutil.ReadFile(gopkg)
+	if err != nil {
+		return "", err
+	}
+	var projects = projects{}
+	if err = toml.Unmarshal(data, &projects); err != nil {
+		return "", err
+	}
+	for _, p := range projects.Projects {
+		if p.Name == prj {
+			return p.Revision, nil
+		}
+	}
+	return "", io.EOF
+}
+
+func replace(w *git.Worktree, oldRev, newRev string) error {
+	rexp, err := regexp.Compile(oldRev)
+	if err != nil {
+		return err
+	}
+
+	res, err := w.Grep(&git.GrepOptions{Patterns: []*regexp.Regexp{rexp}})
+	if err != nil {
+		return err
+	}
+
+	files := make(map[string]struct{})
+	for _, r := range res {
+		if _, ok := files[r.FileName]; !ok {
+			files[r.FileName] = struct{}{}
+		}
+	}
+
+	// replace oldRev by newRev in place
+	var (
+		wg sync.WaitGroup
+	)
+	for f := range files {
+		wg.Add(1)
+		go func(filename string, old, new []byte) {
+			defer wg.Done()
+
+			d, e := ioutil.ReadFile(filename)
+			if e != nil {
+				err = e
+				return
+			}
+
+			d = bytes.Replace(d, old, new, -1)
+
+			e = ioutil.WriteFile(filename, d, 0)
+			if e != nil {
+				err = e
+			}
+
+			fmt.Println("#", filename)
+		}(filepath.Join(w.Filesystem.Root(), f), []byte(oldRev), []byte(newRev))
+	}
+	wg.Wait()
+
+	return err
+}
+
+func ensure(prj string) error {
+	cmd := exec.Command("dep", "ensure", "-v", "-update", prj)
+	out, err := cmd.CombinedOutput()
+	fmt.Println(string(out))
+	if err != nil {
+		return err
+	}
+
+	return nil
+}

pull_request_template.md

@@ -5,6 +5,6 @@ All PRs must keep the documentation up to date. If this PR changes or adds some
 - Schema changes
 - Syntax changes
 - Add or update examples
-- ./rev-upgrade.sh "gopkg.in/src-d/go-mysql-server.v0" "the latest go-mysql-server revision"
+- `go run ./tools/rev-upgrade/main.go -p "gopkg.in/src-d/go-mysql-server.v0" [-r "revision"]`
 
  -->