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random-utils/cmd/see-pr/main.go
Vincent Batts f774e31cc1
see-pr: to add the github PR pull refspec
Signed-off-by: Vincent Batts <vbatts@hashbangbash.com>
2020-05-20 17:58:47 -04:00

92 lines
2.3 KiB
Go

package main
import (
"flag"
"io/ioutil"
"os"
"path/filepath"
"strings"
"github.com/go-git/go-git/v5/config"
"github.com/sirupsen/logrus"
)
var (
DefaultConfigPath = ".git/config"
DefaultRepoPath = "."
DefaultUpstreamName = "origin"
PullRequestRefSpec = "+refs/pull/*/head:refs/remotes/pr/*"
)
func init() {
flag.StringVar(&DefaultConfigPath, "config", DefaultConfigPath, "path to the git config")
flag.StringVar(&DefaultRepoPath, "path", DefaultRepoPath, "local path of the git repo")
flag.StringVar(&DefaultUpstreamName, "remote", DefaultUpstreamName, "upstream remote name")
}
func main() {
flag.Parse()
path := filepath.Join(DefaultRepoPath, DefaultConfigPath)
logrus.Infof("reading from %q", path)
origBuf, err := ioutil.ReadFile(path)
if err != nil {
logrus.Fatal(err)
}
cfg := config.NewConfig()
err = cfg.Unmarshal(origBuf)
if err != nil {
logrus.Fatal(err)
}
changesMade := false
foundRemote := false
outer:
for origin, remote := range cfg.Remotes {
if origin != DefaultUpstreamName {
logrus.Infof("skipping %s", origin)
continue
}
foundRemote = true
foundGithub := false
for _, url := range remote.URLs {
logrus.Infof("%s/%s URL: %s", origin, remote.Name, url)
if strings.Contains(url, "github.com") {
foundGithub = true
}
}
if !foundGithub {
logrus.Warn("no github remote URL found. PR RefSpec doesn't make sense here")
break outer
}
for _, fetch := range remote.Fetch {
if fetch.String() == PullRequestRefSpec {
logrus.Infof("PR Fetch RefSpec is already here!")
break outer
}
logrus.Debugf("%s/%s = %s", origin, remote.Name, fetch)
}
logrus.Infof("appending fetch = %s", PullRequestRefSpec)
remote.Fetch = append(remote.Fetch, config.RefSpec(PullRequestRefSpec))
changesMade = true
}
if !foundRemote {
logrus.Fatalf("failed to find %q remote", DefaultUpstreamName)
}
// write back the Marshalled config
if changesMade {
newBuf, err := cfg.Marshal()
if err != nil {
logrus.Fatalf("failed to marshal back: %s", err)
}
//fmt.Println(string(newBuf))
if err := ioutil.WriteFile(path, newBuf, os.FileMode(0644)); err != nil {
logrus.Fatalf("failed to rewrite %q: %s", path, err)
}
logrus.Infof("SUCCESS! `git fetch` and then you can `git checkout pr/$NUM` of your PRs")
}
}