checkout/main.go

174 lines
4.9 KiB
Go
Raw Normal View History

2024-11-01 22:41:40 +00:00
package main
import (
"context"
"encoding/base64"
"fmt"
"net/url"
"os"
"os/exec"
"os/signal"
"strings"
"git.geekeey.de/actions/sdk"
)
func main() {
action := &CheckoutAction{Action: sdk.New()}
ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt)
defer cancel()
if err := action.run(ctx); err != nil {
action.Errorf("%s", err)
os.Exit(1)
}
}
type CheckoutAction struct {
*sdk.Action
repository string
path string
reference string
}
func (action *CheckoutAction) setup() error {
var err error
action.repository = action.GetInput("repository")
action.path = action.GetInput("path")
action.reference = action.GetInput("ref")
return err
}
func (action *CheckoutAction) run(ctx context.Context) error {
if err := action.setup(); err != nil {
return err
}
env := action.Context()
var sh *Shell
sh = &Shell{}
sh.Add("git", "config", "--global", "--add", "protocol.version", "2")
sh.Add("git", "init", "-q", action.path)
sh.Add("git", "-C", action.path, "config", "--local", "gc.auto", "0")
if err := sh.Run(ctx); err != nil {
return err
}
action.Noticef("Configuring git repository credentials")
server, err := url.Parse(env.ServerURL)
if err != nil {
return err
}
sh = &Shell{}
sh.Add("git", "-C", action.path, "config", "--local", "--add", fmt.Sprintf("url.%s.insteadof", env.ServerURL), fmt.Sprintf("git@%s", server.Host))
sh.Add("git", "-C", action.path, "config", "--local", "--add", fmt.Sprintf("url.%s.insteadof", env.ServerURL), fmt.Sprintf("ssh://git@%s", server.Host))
sh.Add("git", "-C", action.path, "config", "--local", "--add", fmt.Sprintf("url.%s.insteadof", env.ServerURL), fmt.Sprintf("git://%s", server.Host))
if err := sh.Run(ctx); err != nil {
return err
}
enc := base64.StdEncoding
header := fmt.Sprintf("Authorization: Basic %s", enc.EncodeToString([]byte(fmt.Sprintf("x-access-token:%s", env.Token))))
sh = &Shell{}
sh.Add("git", "-C", action.path, "config", "--local", "--add", fmt.Sprintf("http.%s.extraheader", env.ServerURL), header)
if err := sh.Run(ctx); err != nil {
return err
}
origin := "origin"
sh = &Shell{}
sh.Add("git", "-C", action.path, "remote", "add", origin, action.repository)
if err := sh.Run(ctx); err != nil {
return err
}
stdout, _, err := execx(ctx, "git", "-C", action.path, "ls-remote", origin, action.reference)
if err != nil {
return err
}
lines := strings.Split(stdout, "\t")
if len(lines) < 2 {
return fmt.Errorf("git ls-remore resolved nothing")
}
sha := strings.TrimSpace(lines[0])
ref := strings.TrimSpace(lines[1])
sh = &Shell{}
if strings.HasPrefix(ref, "refs/heads/") {
name := strings.TrimPrefix(ref, "refs/heads/")
remote := fmt.Sprintf("refs/remotes/%s/%s", origin, name)
branch := name
action.Debugf("Checking out branch %s@%s", name, sha)
sh.Add("git", "-C", action.path, "fetch", "--no-tags", "--prune", "--no-recurse-submodules", "--depth=1",
origin, fmt.Sprintf("+%s:%s", sha, remote))
sh.Add("git", "-C", action.path, "checkout", "--force", "-B", branch, remote)
} else if strings.HasPrefix(ref, "refs/pull/") {
name := strings.TrimPrefix(ref, "refs/pull/")
remote := fmt.Sprintf("refs/remotes/pull/%s", name)
action.Debugf("Checking out pull-request %s@%s", name, sha)
var branch string
if len(env.BaseRef) != 0 {
branch = env.BaseRef
} else if len(env.HeadRef) != 0 {
branch = env.HeadRef
} else {
return fmt.Errorf("pull request can not find base ref for branch")
}
sh.Add("git", "-C", action.path, "fetch", "--no-tags", "--prune", "--no-recurse-submodules", "--depth=1",
origin, fmt.Sprintf("+%s:%s", sha, remote))
sh.Add("git", "-C", action.path, "checkout", "--force", "-B", branch, remote)
} else if strings.HasPrefix(ref, "refs/tags/") {
name := strings.TrimPrefix(ref, "refs/tags/")
remote := fmt.Sprintf("refs/tags/%s", name)
action.Debugf("Checking out ptag %s@%s", name, sha)
sh.Add("git", "-C", action.path, "fetch", "--no-tags", "--prune", "--no-recurse-submodules", "--depth=1",
origin, fmt.Sprintf("+%s:%s", sha, remote))
sh.Add("git", "-C", action.path, "checkout", "--force", remote)
} else {
action.Debugf("Checking out detached head %s", ref)
sh.Add("git", "-C", action.path, "fetch", "--no-tags", "--prune", "--no-recurse-submodules", "--depth=1",
origin, ref)
sh.Add("git", "-C", action.path, "checkout", "--force", ref)
}
if err := sh.Run(ctx); err != nil {
return err
}
return nil
}
type Shell [][]string
func (sh *Shell) Add(line ...string) { *sh = append([][]string(*sh), line) }
func (sh *Shell) Run(ctx context.Context) error {
for _, line := range [][]string(*sh) {
if _, _, err := execx(ctx, line...); err != nil {
return err
}
}
return nil
}
func execx(ctx context.Context, args ...string) (string, string, error) {
cmd := exec.CommandContext(ctx, args[0], args[1:]...)
var outbuf, errbuf strings.Builder
cmd.Stdout = &outbuf
cmd.Stderr = &errbuf
err := cmd.Run()
return outbuf.String(), errbuf.String(), err
}