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|
package git
import (
"context"
"errors"
"fmt"
"gitlab.com/gitlab-org/gitaly/v16/internal/git/repository"
"gitlab.com/gitlab-org/gitaly/v16/internal/gitaly/config"
"gitlab.com/gitlab-org/gitaly/v16/internal/log"
"gitlab.com/gitlab-org/gitaly/v16/internal/metadata"
"gitlab.com/gitlab-org/gitaly/v16/internal/metadata/featureflag"
"gitlab.com/gitlab-org/gitaly/v16/internal/transaction/txinfo"
"gitlab.com/gitlab-org/gitaly/v16/proto/go/gitalypb"
labkittracing "gitlab.com/gitlab-org/labkit/tracing"
)
// envInjector is responsible for injecting environment variables required for tracing into
// the child process.
var envInjector = labkittracing.NewEnvInjector()
// WithDisabledHooks returns an option that satisfies the requirement to set up
// hooks, but won't in fact set up hook execution.
func WithDisabledHooks() CmdOpt {
return func(_ context.Context, _ config.Cfg, _ CommandFactory, cc *cmdCfg) error {
cc.hooksConfigured = true
return nil
}
}
// WithRefTxHook returns an option that populates the safe command with the
// environment variables necessary to properly execute a reference hook for
// repository changes that may possibly update references
func WithRefTxHook(repo repository.GitRepo) CmdOpt {
return func(ctx context.Context, cfg config.Cfg, gitCmdFactory CommandFactory, cc *cmdCfg) error {
if repo == nil {
return fmt.Errorf("missing repo: %w", ErrInvalidArg)
}
// The reference-transaction hook does not need any project-specific information
// about the repository. So in order to make the hook usable by sites which do not
// have a project repository available (e.g. object pools), this function accepts a
// `repository.GitRepo` and just creates an ad-hoc proto repo.
if err := cc.configureHooks(ctx, &gitalypb.Repository{
StorageName: repo.GetStorageName(),
GitAlternateObjectDirectories: repo.GetGitAlternateObjectDirectories(),
GitObjectDirectory: repo.GetGitObjectDirectory(),
RelativePath: repo.GetRelativePath(),
}, cfg, gitCmdFactory, nil, ReferenceTransactionHook); err != nil {
return fmt.Errorf("ref hook env var: %w", err)
}
return nil
}
}
// WithPackObjectsHookEnv provides metadata for gitaly-hooks so it can act as a pack-objects hook.
func WithPackObjectsHookEnv(repo *gitalypb.Repository, protocol string) CmdOpt {
return func(ctx context.Context, cfg config.Cfg, gitCmdFactory CommandFactory, cc *cmdCfg) error {
if !cfg.PackObjectsCache.Enabled {
return nil
}
if repo == nil {
return fmt.Errorf("missing repo: %w", ErrInvalidArg)
}
userDetails := &UserDetails{
Protocol: protocol,
UserID: metadata.GetValue(ctx, "user_id"),
Username: metadata.GetValue(ctx, "username"),
RemoteIP: metadata.GetValue(ctx, "remote_ip"),
}
if err := cc.configureHooks(
ctx,
repo,
cfg,
gitCmdFactory,
userDetails,
PackObjectsHook,
); err != nil {
return fmt.Errorf("pack-objects hook configuration: %w", err)
}
cc.globals = append(cc.globals, ConfigPair{
Key: "uploadpack.packObjectsHook",
Value: cfg.BinaryPath("gitaly-hooks"),
})
return nil
}
}
// ReceivePackRequest abstracts away the different requests that end up
// spawning git-receive-pack.
type ReceivePackRequest interface {
GetGlId() string
GetGlUsername() string
GetGlRepository() string
GetRepository() *gitalypb.Repository
}
// WithReceivePackHooks returns an option that populates the safe command with the environment
// variables necessary to properly execute the pre-receive, update and post-receive hooks for
// git-receive-pack(1).
func WithReceivePackHooks(req ReceivePackRequest, protocol string) CmdOpt {
return func(ctx context.Context, cfg config.Cfg, gitCmdFactory CommandFactory, cc *cmdCfg) error {
if err := cc.configureHooks(ctx, req.GetRepository(), cfg, gitCmdFactory, &UserDetails{
UserID: req.GetGlId(),
Username: req.GetGlUsername(),
Protocol: protocol,
}, ReceivePackHooks); err != nil {
return err
}
return nil
}
}
// configureHooks updates the command configuration to include all environment
// variables required by the reference transaction hook and any other needed
// options to successfully execute hooks.
func (cc *cmdCfg) configureHooks(
ctx context.Context,
repo *gitalypb.Repository,
cfg config.Cfg,
gitCmdFactory CommandFactory,
userDetails *UserDetails,
requestedHooks Hook,
) error {
if cc.hooksConfigured {
return errors.New("hooks already configured")
}
objectHash, err := DetectObjectHash(ctx, gitCmdFactory, repo)
if err != nil {
return fmt.Errorf("detecting object hash: %w", err)
}
var transaction *txinfo.Transaction
if tx, err := txinfo.TransactionFromContext(ctx); err == nil {
transaction = &tx
} else if !errors.Is(err, txinfo.ErrTransactionNotFound) {
return err
}
payload, err := NewHooksPayload(
cfg,
repo,
objectHash,
transaction,
userDetails,
requestedHooks,
featureflag.FromContext(ctx)).Env()
if err != nil {
return err
}
cc.env = append(
cc.env,
payload,
fmt.Sprintf("%s=%s", log.GitalyLogDirEnvKey, cfg.Logging.Dir),
)
cc.env = envInjector(ctx, cc.env)
cc.globals = append(cc.globals, ConfigPair{Key: "core.hooksPath", Value: gitCmdFactory.HooksPath(ctx)})
cc.hooksConfigured = true
return nil
}
|
