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|
//go:build static && system_libgit2
package main
import (
"context"
"encoding/gob"
"flag"
"fmt"
"os"
"strings"
"github.com/grpc-ecosystem/go-grpc-middleware/logging/logrus/ctxlogrus"
git "github.com/libgit2/git2go/v34"
"github.com/sirupsen/logrus"
"gitlab.com/gitlab-org/gitaly/v16/internal/featureflag"
"gitlab.com/gitlab-org/gitaly/v16/internal/git2go"
glog "gitlab.com/gitlab-org/gitaly/v16/internal/log"
"gitlab.com/gitlab-org/labkit/correlation"
)
type subcmd interface {
Flags() *flag.FlagSet
Run(ctx context.Context, decoder *gob.Decoder, encoder *gob.Encoder) error
}
var subcommands = map[string]subcmd{
"apply": &applySubcommand{},
"cherry-pick": &cherryPickSubcommand{},
"commit": &commitSubcommand{},
"conflicts": &conflictsSubcommand{},
"merge": &mergeSubcommand{},
"rebase": &rebaseSubcommand{},
"revert": &revertSubcommand{},
"resolve": &resolveSubcommand{},
"submodule": &submoduleSubcommand{},
}
func fatalf(logger logrus.FieldLogger, encoder *gob.Encoder, format string, args ...interface{}) {
err := encoder.Encode(git2go.Result{
Err: git2go.SerializableError(fmt.Errorf(format, args...)),
})
if err != nil {
logger.WithError(err).Error("encode to gob failed")
}
// An exit code of 1 would indicate an error over stderr. Since our errors
// are encoded over gob, we need to exit cleanly
os.Exit(0)
}
func configureLogging(format, level string) {
// Gitaly logging by default goes to stdout, which would interfere with gob
// encoding.
for _, l := range glog.Loggers {
l.Out = os.Stderr
}
glog.Configure(glog.Loggers, format, level)
}
func main() {
decoder := gob.NewDecoder(os.Stdin)
encoder := gob.NewEncoder(os.Stdout)
var logFormat, logLevel, correlationID string
var enabledFeatureFlags, disabledFeatureFlags featureFlagArg
flags := flag.NewFlagSet(git2go.BinaryName, flag.PanicOnError)
flags.StringVar(&logFormat, "log-format", "", "logging format")
flags.StringVar(&logLevel, "log-level", "", "logging level")
flags.StringVar(&correlationID, "correlation-id", "", "correlation ID used for request tracing")
flags.Var(
&enabledFeatureFlags,
"enabled-feature-flags",
"comma separated list of explicitly enabled feature flags",
)
flags.Var(
&disabledFeatureFlags,
"disabled-feature-flags",
"comma separated list of explicitly disabled feature flags",
)
_ = flags.Parse(os.Args[1:])
if correlationID == "" {
correlationID = correlation.SafeRandomID()
}
configureLogging(logFormat, logLevel)
ctx := correlation.ContextWithCorrelation(context.Background(), correlationID)
logger := glog.Default().WithFields(logrus.Fields{
"command.name": git2go.BinaryName,
"correlation_id": correlationID,
"enabled_feature_flags": enabledFeatureFlags,
"disabled_feature_flags": disabledFeatureFlags,
})
if flags.NArg() < 1 {
fatalf(logger, encoder, "missing subcommand")
}
subcmd, ok := subcommands[flags.Arg(0)]
if !ok {
fatalf(logger, encoder, "unknown subcommand: %q", flags.Arg(0))
}
subcmdFlags := subcmd.Flags()
if err := subcmdFlags.Parse(flags.Args()[1:]); err != nil {
fatalf(logger, encoder, "parsing flags of %q: %s", subcmdFlags.Name(), err)
}
if subcmdFlags.NArg() != 0 {
fatalf(logger, encoder, "%s: trailing arguments", subcmdFlags.Name())
}
if err := git.EnableFsyncGitDir(true); err != nil {
fatalf(logger, encoder, "enable fsync: %s", err)
}
for _, configLevel := range []git.ConfigLevel{
git.ConfigLevelSystem,
git.ConfigLevelXDG,
git.ConfigLevelGlobal,
} {
if err := git.SetSearchPath(configLevel, "/dev/null"); err != nil {
fatalf(logger, encoder, "setting search path: %s", err)
}
}
subcmdLogger := logger.WithField("command.subcommand", subcmdFlags.Name())
subcmdLogger.Infof("starting %s command", subcmdFlags.Name())
ctx = ctxlogrus.ToContext(ctx, subcmdLogger)
ctx = enabledFeatureFlags.ToContext(ctx, true)
ctx = disabledFeatureFlags.ToContext(ctx, false)
if err := subcmd.Run(ctx, decoder, encoder); err != nil {
subcmdLogger.WithError(err).Errorf("%s command failed", subcmdFlags.Name())
fatalf(logger, encoder, "%s: %s", subcmdFlags.Name(), err)
}
subcmdLogger.Infof("%s command finished", subcmdFlags.Name())
}
type featureFlagArg []featureflag.FeatureFlag
func (v *featureFlagArg) String() string {
metadataKeys := make([]string, 0, len(*v))
for _, flag := range *v {
metadataKeys = append(metadataKeys, flag.MetadataKey())
}
return strings.Join(metadataKeys, ",")
}
func (v *featureFlagArg) Set(s string) error {
if s == "" {
return nil
}
for _, metadataKey := range strings.Split(s, ",") {
flag, err := featureflag.FromMetadataKey(metadataKey)
if err != nil {
return err
}
*v = append(*v, flag)
}
return nil
}
func (v featureFlagArg) ToContext(ctx context.Context, enabled bool) context.Context {
for _, flag := range v {
ctx = featureflag.IncomingCtxWithFeatureFlag(ctx, flag, enabled)
}
return ctx
}
|
