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constants.go
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constants.go
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/*
* === This file is part of ALICE O² ===
*
* Copyright 2018 CERN and copyright holders of ALICE O².
* Author: Teo Mrnjavac <teo.mrnjavac@cern.ch>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* In applying this license CERN does not waive the privileges and
* immunities granted to it by virtue of its status as an
* Intergovernmental Organization or submit itself to any jurisdiction.
*/
package product
import (
"io/ioutil"
"os"
"path/filepath"
"strings"
"github.com/go-git/go-git/v5"
"github.com/go-git/go-git/v5/plumbing"
)
func getExecutableDir() string {
ex, err := os.Executable()
if err != nil {
return ""
}
exPath := filepath.Dir(ex)
return exPath
}
func fillVersionFromVersionFile(versionFilePath string) {
vfContents, err := ioutil.ReadFile(versionFilePath)
if err != nil {
return
}
lines := strings.Split(string(vfContents), "\n")
for _, line := range lines {
if !strings.HasPrefix(line, "VERSION_") {
continue
}
splitLine := strings.Split(line, ":=")
if len(splitLine) != 2 {
return
}
switch strings.TrimSpace(splitLine[0]) {
case "VERSION_MAJOR":
VERSION_MAJOR = strings.TrimSpace(splitLine[1])
case "VERSION_MINOR":
VERSION_MINOR = strings.TrimSpace(splitLine[1])
case "VERSION_PATCH":
VERSION_PATCH = strings.TrimSpace(splitLine[1])
}
}
}
func fillBuildFromGit(localRepoPath string) {
// equivalent to git rev-parse --short HEAD
r, err := git.PlainOpen(localRepoPath)
if err != nil {
return // all of this is best-effort
}
h, err := r.ResolveRevision(plumbing.Revision("HEAD"))
if err != nil {
return
}
BUILD = h.String()[:7]
}
func init() {
// If the core was built with go build directly instead of make.
if VERSION_MAJOR == "0" &&
VERSION_MINOR == "0" &&
VERSION_PATCH == "0" &&
BUILD == "" {
exPath := getExecutableDir()
basePath := filepath.Dir(exPath)
versionFilePath := filepath.Join(basePath, "VERSION")
if _, err := os.Stat(versionFilePath); err == nil {
fillVersionFromVersionFile(versionFilePath)
}
fillBuildFromGit(basePath)
}
VERSION = strings.Join([]string{VERSION_MAJOR, VERSION_MINOR, VERSION_PATCH}, ".")
VERSION_SHORT = VERSION
VERSION_BUILD = strings.Join([]string{VERSION, BUILD}, "-")
}
var ( // Acquired from -ldflags="-X=..." in Makefile
VERSION_MAJOR = "0"
VERSION_MINOR = "0"
VERSION_PATCH = "0"
BUILD = ""
)
var (
NAME = "aliecs"
PRETTY_SHORTNAME = "AliECS"
PRETTY_FULLNAME = "ALICE Experiment Control System"
VERSION string
VERSION_SHORT string
VERSION_BUILD string
)