version.go

// Copyright 2025 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package main

import (
	"fmt"
	"runtime/debug"
)

// getCommitID returns the commit ID of the current build, or an error if it
// cannot be determined. It reads the "vcs.revision" setting from the
// runtime.BuildInfo and returns that value.
func getCommitID() (string, error) {
	info, ok := debug.ReadBuildInfo()
	if !ok {
		return "", fmt.Errorf("error calling debug.ReadBuildInfo")
	}
	for _, setting := range info.Settings {
		if setting.Key == "vcs.revision" {
			return setting.Value, nil
		}
	}
	return "", fmt.Errorf("BuildInfo.Settings is missing vcs.revision")
}