internal/version/version.go

// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
// or more contributor license agreements. Licensed under the Elastic License 2.0;
// you may not use this file except in compliance with the Elastic License 2.0.

package version

import (
	"strconv"
	"time"
)

var (
	// CommitHash is the Git hash of the branch, used for version purposes (set externally with ldflags).
	CommitHash = "undefined"
	// SourceDateEpoch is the build time of the binary (set externally with ldflags).
	// https://reproducible-builds.org/docs/source-date-epoch/
	SourceDateEpoch string
	// Tag describes the semver version of the application (set externally with ldflags).
	Tag string
)

// SourceTimeFormatted method returns the source last changed time in UTC preserving the RFC3339 format.
func SourceTimeFormatted() string {
	if SourceDateEpoch == "" {
		return "unknown"
	}

	seconds, err := strconv.ParseInt(SourceDateEpoch, 10, 64)
	if err != nil {
		return "invalid"
	}

	// NOTE: time is returned in UTC to avoid timezone difference issues
	return time.Unix(seconds, 0).UTC().Format(time.RFC3339)
}