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package main
import (
"fmt"
"os"
"path/filepath"
"syscall"
"gitlab.com/gitlab-org/gitlab-shell/go/cmd/gitlab-shell/command"
"gitlab.com/gitlab-org/gitlab-shell/go/internal/config"
)
var (
binDir string
rootDir string
features map[command.CommandType]bool
)
func init() {
binDir = filepath.Dir(os.Args[0])
rootDir = filepath.Dir(binDir)
features = map[command.CommandType]bool{}
}
func migrate(config *config.Config) (int, bool) {
if !config.Migration.Enabled {
return 0, false
}
command, err := command.New(os.Args)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to build command: %v\n", err)
return 0, false
}
if featureEnabled(config, command.Type) {
}
return 0, false
}
// rubyExec will never return. It either replaces the current process with a
// Ruby interpreter, or outputs an error and kills the process.
func execRuby() {
rubyCmd := filepath.Join(binDir, "gitlab-shell-ruby")
execErr := syscall.Exec(rubyCmd, os.Args, os.Environ())
if execErr != nil {
fmt.Fprintf(os.Stderr, "Failed to exec(%q): %v\n", rubyCmd, execErr)
os.Exit(1)
}
}
func main() {
// Fall back to Ruby in case of problems reading the config, but issue a
// warning as this isn't something we can sustain indefinitely
config, err := config.NewFromDir(rootDir)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to read config, falling back to gitlab-shell-ruby: %v", err)
execRuby()
}
// Try to handle the command with the Go implementation
if exitCode, done := migrate(config); done {
os.Exit(exitCode)
}
// Since a migration has not handled the command, fall back to Ruby to do so
execRuby()
}
func featureEnabled(config *config.Config, commandType command.CommandType) bool {
if features[commandType] {
return true
}
fmt.Fprintf(os.Stderr, "Config: %v", config.Migration)
for _, featureName := range config.Migration.Features {
fmt.Fprintf(os.Stderr, "Setting feature: %v to %v", featureName, command.CommandType(featureName))
features[command.CommandType(featureName)] = true
}
return features[commandType]
}
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