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|
package hook
import (
"bytes"
"context"
"errors"
"fmt"
"io"
"math"
"strings"
"github.com/grpc-ecosystem/go-grpc-middleware/logging/logrus/ctxlogrus"
"gitlab.com/gitlab-org/gitaly/v16/internal/git"
"gitlab.com/gitlab-org/gitaly/v16/internal/gitlab"
"gitlab.com/gitlab-org/gitaly/v16/internal/structerr"
"gitlab.com/gitlab-org/gitaly/v16/proto/go/gitalypb"
)
const (
// A standard terminal window is (at least) 80 characters wide.
terminalWidth = 80
gitRemoteMessagePrefixLength = len("remote: ")
terminalMessagePadding = 2
// Git prefixes remote messages with "remote: ", so this width is subtracted
// from the width available to us.
maxMessageWidth = terminalWidth - gitRemoteMessagePrefixLength
// Our centered text shouldn't start or end right at the edge of the window,
// so we add some horizontal padding: 2 chars on either side.
maxMessageTextWidth = maxMessageWidth - 2*terminalMessagePadding
)
func printMessages(messages []gitlab.PostReceiveMessage, w io.Writer) error {
for _, message := range messages {
if _, err := w.Write([]byte("\n")); err != nil {
return err
}
switch message.Type {
case "basic":
if _, err := w.Write([]byte(message.Message)); err != nil {
return err
}
case "alert":
if err := printAlert(message, w); err != nil {
return err
}
default:
return fmt.Errorf("invalid message type: %v", message.Type)
}
if _, err := w.Write([]byte("\n\n")); err != nil {
return err
}
}
return nil
}
func centerLine(b []byte) []byte {
b = bytes.TrimSpace(b)
linePadding := int(math.Max((float64(maxMessageWidth)-float64(len(b)))/2, 0))
return append(bytes.Repeat([]byte(" "), linePadding), b...)
}
func printAlert(m gitlab.PostReceiveMessage, w io.Writer) error {
if _, err := w.Write(bytes.Repeat([]byte("="), maxMessageWidth)); err != nil {
return err
}
if _, err := w.Write([]byte("\n\n")); err != nil {
return err
}
words := strings.Fields(m.Message)
line := bytes.NewBufferString("")
for _, word := range words {
if line.Len()+1+len(word) > maxMessageTextWidth {
if _, err := w.Write(append(centerLine(line.Bytes()), '\n')); err != nil {
return err
}
line.Reset()
}
if _, err := line.WriteString(word + " "); err != nil {
return err
}
}
if _, err := w.Write(centerLine(line.Bytes())); err != nil {
return err
}
if _, err := w.Write([]byte("\n\n")); err != nil {
return err
}
if _, err := w.Write(bytes.Repeat([]byte("="), maxMessageWidth)); err != nil {
return err
}
return nil
}
//nolint:revive // This is unintentionally missing documentation.
func (m *GitLabHookManager) PostReceiveHook(ctx context.Context, repo *gitalypb.Repository, pushOptions, env []string, stdin io.Reader, stdout, stderr io.Writer) error {
payload, err := git.HooksPayloadFromEnv(env)
if err != nil {
return structerr.NewInternal("extracting hooks payload: %w", err)
}
changes, err := io.ReadAll(stdin)
if err != nil {
return structerr.NewInternal("reading stdin from request: %w", err)
}
if isPrimary(payload) {
if err := m.postReceiveHook(ctx, payload, repo, pushOptions, env, changes, stdout, stderr); err != nil {
ctxlogrus.Extract(ctx).WithError(err).Warn("stopping transaction because post-receive hook failed")
// If the post-receive hook declines the push, then we need to stop any
// secondaries voting on the transaction.
if err := m.stopTransaction(ctx, payload); err != nil {
ctxlogrus.Extract(ctx).WithError(err).Error("failed stopping transaction in post-receive hook")
}
return err
}
}
return nil
}
func (m *GitLabHookManager) postReceiveHook(ctx context.Context, payload git.HooksPayload, repo *gitalypb.Repository, pushOptions, env []string, stdin []byte, stdout, stderr io.Writer) error {
if len(stdin) == 0 {
return structerr.NewInternal("hook got no reference updates")
}
if payload.UserDetails == nil {
return structerr.NewInternal("payload has no receive hooks info")
}
if payload.UserDetails.UserID == "" {
return structerr.NewInternal("user ID not set")
}
if repo.GetGlRepository() == "" {
return structerr.NewInternal("repository not set")
}
ok, messages, err := m.gitlabClient.PostReceive(
ctx, repo.GetGlRepository(),
payload.UserDetails.UserID,
string(stdin),
pushOptions...,
)
if err != nil {
return fmt.Errorf("GitLab: %v", err)
}
if err := printMessages(messages, stdout); err != nil {
return fmt.Errorf("error writing messages to stream: %v", err)
}
if !ok {
return errors.New("")
}
executor, err := m.newCustomHooksExecutor(repo, "post-receive")
if err != nil {
return structerr.NewInternal("creating custom hooks executor: %v", err)
}
customEnv, err := m.customHooksEnv(ctx, payload, pushOptions, env)
if err != nil {
return structerr.NewInternal("constructing custom hook environment: %v", err)
}
if err = executor(
ctx,
nil,
customEnv,
bytes.NewReader(stdin),
stdout,
stderr,
); err != nil {
return fmt.Errorf("executing custom hooks: %w", err)
}
return nil
}
|
