add pre-receive hook command
message: add pre-receive hook command change_hash: ACKwl15k0EUU9zt2guC/yV0qA13f+YQbri/CRMENSNjc credentials: - type: pgp_signature pub_key_id: 95C46FA6A41148AC body: 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 account: mediocregopher
This commit is contained in:
mediocregopher
parent
3f4d48ff89
commit
f0310bda75
@ -1,39 +1,57 @@
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package main
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import (
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"bufio"
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"dehub"
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"errors"
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"flag"
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"fmt"
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"io"
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"os"
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"strings"
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"gopkg.in/src-d/go-git.v4/plumbing"
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)
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func exitErr(err error) {
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fmt.Fprintf(os.Stderr, "exiting: %v\n", err)
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os.Stderr.Sync()
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os.Stdout.Sync()
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os.Exit(1)
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}
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type subCmdCtx struct {
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repo *dehub.Repo
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repo func() *dehub.Repo
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flag *flag.FlagSet
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args []string
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}
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var subCmds = []struct {
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func (sctx subCmdCtx) flagParse() {
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if err := sctx.flag.Parse(sctx.args); err != nil {
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exitErr(err)
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}
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}
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type subCmd struct {
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name, descr string
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body func(sctx subCmdCtx) error
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}{
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}
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var subCmds = []subCmd{
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{
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name: "commit",
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descr: "commits staged changes to the head of the current branch",
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body: func(sctx subCmdCtx) error {
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flag := flag.NewFlagSet("commit", flag.ExitOnError)
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msg := flag.String("msg", "", "Commit message to use")
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accountID := flag.String("account-id", "", "Account to sign commit as")
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flag.Parse(sctx.args)
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msg := sctx.flag.String("msg", "", "Commit message to use")
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accountID := sctx.flag.String("account-id", "", "Account to sign commit as")
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sctx.flagParse()
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if *msg == "" || *accountID == "" {
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flag.PrintDefaults()
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return errors.New("-msg and -account-id are both required")
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}
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cfg, err := sctx.repo.LoadConfig()
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cfg, err := sctx.repo().LoadConfig()
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if err != nil {
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return err
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}
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@ -58,7 +76,7 @@ var subCmds = []struct {
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return fmt.Errorf("could not cast %+v to SignifierInterface: %w", sig, err)
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}
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_, hash, err := sctx.repo.CommitMaster(*msg, *accountID, sigInt)
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_, hash, err := sctx.repo().CommitMaster(*msg, *accountID, sigInt)
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if err != nil {
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return err
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}
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@ -70,16 +88,15 @@ var subCmds = []struct {
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name: "verify",
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descr: "verifies one or more commits as having the proper credentials",
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body: func(sctx subCmdCtx) error {
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flag := flag.NewFlagSet("verify", flag.ExitOnError)
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rev := flag.String("rev", "HEAD", "Revision of commit to verify")
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flag.Parse(sctx.args)
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rev := sctx.flag.String("rev", "HEAD", "Revision of commit to verify")
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sctx.flagParse()
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h, err := sctx.repo.GitRepo.ResolveRevision(plumbing.Revision(*rev))
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h, err := sctx.repo().GitRepo.ResolveRevision(plumbing.Revision(*rev))
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if err != nil {
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return fmt.Errorf("could not resolve revision %q: %w", *rev, err)
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}
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if err := sctx.repo.VerifyMasterCommit(*h); err != nil {
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if err := sctx.repo().VerifyMasterCommit(*h); err != nil {
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return fmt.Errorf("could not verify commit at %q (%s): %w", *rev, *h, err)
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}
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@ -87,50 +104,173 @@ var subCmds = []struct {
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return nil
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},
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},
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{
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name: "hook",
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descr: "use dehub as a git hook",
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body: func(sctx subCmdCtx) error {
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preRcv := sctx.flag.Bool("pre-receive", false, "Use dehub as a server-side pre-receive hook")
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sctx.flagParse()
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if !*preRcv {
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flag.PrintDefaults()
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return errors.New("must set the hook type")
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}
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br := bufio.NewReader(os.Stdin)
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for {
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line, err := br.ReadString('\n')
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if errors.Is(err, io.EOF) {
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return nil
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} else if err != nil {
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return fmt.Errorf("error reading next line from stdin: %w", err)
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}
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lineParts := strings.Fields(line)
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if len(lineParts) < 3 {
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return fmt.Errorf("malformed pre-receive hook stdin line %q", line)
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}
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if plumbing.ReferenceName(lineParts[2]) != plumbing.Master {
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return fmt.Errorf("only commits to the master branch are allowed at the moment (tried to push to %q)", lineParts[2])
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}
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// the zeroRevision gets sent on the very first push
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const zeroRevision plumbing.Revision = "0000000000000000000000000000000000000000"
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fromRev := plumbing.Revision(lineParts[0])
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var fromHash *plumbing.Hash
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if fromRev != zeroRevision {
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fromHash, err = sctx.repo().GitRepo.ResolveRevision(fromRev)
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if err != nil {
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return fmt.Errorf("unable to resolve revision %q: %w", fromRev, err)
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}
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}
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toRev := plumbing.Revision(lineParts[1])
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toHash, err := sctx.repo().GitRepo.ResolveRevision(toRev)
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if err != nil {
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return fmt.Errorf("unable to resolve revision %q: %w", toRev, err)
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}
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toCommit, err := sctx.repo().GitRepo.CommitObject(*toHash)
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if err != nil {
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return fmt.Errorf("unable to find commit %q: %w", *toHash, err)
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}
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var hashesToCheck []plumbing.Hash
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var found bool
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for currCommit := toCommit; ; {
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hashesToCheck = append(hashesToCheck, currCommit.Hash)
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if currCommit.NumParents() == 0 {
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break
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} else if currCommit.NumParents() > 1 {
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return fmt.Errorf("commit %q has more than one parent: %+v",
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currCommit.Hash, currCommit.ParentHashes)
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}
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parentCommit, err := currCommit.Parent(0)
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if err != nil {
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return fmt.Errorf("unable to get parent of commit %q: %w", currCommit.Hash, err)
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} else if fromHash != nil && parentCommit.Hash == *fromHash {
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found = true
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break
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}
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currCommit = parentCommit
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}
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if !found && fromHash != nil {
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return fmt.Errorf("unable to find commit %q as an ancestor of %q", *fromHash, *toHash)
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}
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for i := len(hashesToCheck) - 1; i >= 0; i-- {
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hash := hashesToCheck[i]
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fmt.Printf("Verifying master commit %q\n", hash)
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if err := sctx.repo().VerifyMasterCommit(hash); err != nil {
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return fmt.Errorf("could not verify master commit %q", hash)
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}
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}
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fmt.Println("All pushed commits have been verified, well done.")
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return nil
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}
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},
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},
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}
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func printHelp() {
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fmt.Printf("USAGE: %s <command> [-h]\n\n", os.Args[0])
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func main() {
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var pickedSubCmd bool
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var subCmd subCmd
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flagSet := flag.NewFlagSet("dehub", flag.ContinueOnError)
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flagSet.Usage = func() {
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cmd := "<command>"
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if pickedSubCmd {
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cmd = subCmd.name
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}
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fmt.Printf("USAGE: %s [global flags] %s [command flags]\n\n", os.Args[0], cmd)
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if !pickedSubCmd {
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fmt.Println("COMMANDS")
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for _, subCmd := range subCmds {
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fmt.Printf("\t%s : %s\n", subCmd.name, subCmd.descr)
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}
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}
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fmt.Println("")
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}
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func exitErr(err error) {
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fmt.Fprintf(os.Stderr, "exiting: %v\n", err)
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os.Stderr.Sync()
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os.Stdout.Sync()
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os.Exit(1)
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}
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fmt.Println("GLOBAL FLAGS")
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flagSet.PrintDefaults()
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fmt.Println("")
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}
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func main() {
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if len(os.Args) < 2 {
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printHelp()
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bare := flagSet.Bool("bare", false, "If set then dehub will expect to be working with a bare repo")
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if err := flagSet.Parse(os.Args[1:]); err != nil {
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exitErr(err)
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return
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}
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subCmdName := strings.ToLower(os.Args[1])
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for _, subCmd := range subCmds {
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if subCmd.name != subCmdName {
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continue
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args := flagSet.Args()
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if len(args) < 1 {
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flagSet.Usage()
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exitErr(errors.New("no command selected"))
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}
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r, err := dehub.OpenRepo(".")
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if err != nil {
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subCmdName, args := strings.ToLower(args[0]), args[1:]
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for _, subCmd = range subCmds {
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if pickedSubCmd = subCmd.name == subCmdName; pickedSubCmd {
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break
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}
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}
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if !pickedSubCmd {
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flagSet.Usage()
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exitErr(fmt.Errorf("unknown command %q", subCmdName))
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}
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subFlagSet := flag.NewFlagSet(subCmd.name, flag.ExitOnError)
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subFlagSet.Usage = func() {
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flagSet.Usage()
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fmt.Println("COMMAND FLAGS")
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subFlagSet.PrintDefaults()
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fmt.Println("")
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}
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var r *dehub.Repo
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repoFn := func() *dehub.Repo {
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if r != nil {
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return r
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}
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var err error
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if r, err = dehub.OpenRepo(".", dehub.OpenBare(*bare)); err != nil {
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wd, _ := os.Getwd()
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err = fmt.Errorf("failed to OpenRepo at %q: %w", wd, err)
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exitErr(err)
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}
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return r
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}
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err = subCmd.body(subCmdCtx{
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repo: r,
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args: os.Args[2:],
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err := subCmd.body(subCmdCtx{
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repo: repoFn,
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flag: subFlagSet,
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args: args,
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})
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if err != nil {
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exitErr(err)
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}
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return
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}
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fmt.Printf("unknown command %q\n\n", subCmdName)
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printHelp()
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}
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25
repo.go
25
repo.go
@ -26,6 +26,22 @@ var (
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ConfigPath = filepath.Join(DehubDir, "config.yml")
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)
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type repoOpts struct {
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bare bool
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}
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// OpenOption is an option which can be passed to the OpenRepo function to
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// affect the Repo's behavior.
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type OpenOption func(*repoOpts)
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// OpenBare returns an OpenOption which, if true is given, causes the OpenRepo
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// function to expect to open a bare repo.
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func OpenBare(bare bool) OpenOption {
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return func(o *repoOpts) {
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o.bare = bare
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}
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}
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// Repo is an object which allows accessing and modifying the dehub repo.
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type Repo struct {
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GitRepo *git.Repository
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@ -36,11 +52,16 @@ type Repo struct {
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//
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// The given path is expected to have a git repo and .dehub folder already
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// initialized.
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func OpenRepo(path string) (*Repo, error) {
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func OpenRepo(path string, options ...OpenOption) (*Repo, error) {
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var opts repoOpts
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for _, opt := range options {
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opt(&opts)
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}
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r := Repo{}
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var err error
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openOpts := &git.PlainOpenOptions{
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DetectDotGit: true,
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DetectDotGit: !opts.bare,
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}
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if r.GitRepo, err = git.PlainOpenWithOptions(path, openOpts); err != nil {
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return nil, fmt.Errorf("could not open git repo: %w", err)
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