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Remove vendor from build scripts

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This commit is contained in:
Alexander Neumann 2020-03-01 11:30:02 +01:00
parent 266f9dbe16
commit 44a57d66c3
2 changed files with 47 additions and 216 deletions
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2
Makefile
View file

@ -3,7 +3,7 @@
all: restic
restic:
go run -mod=vendor build.go || go run build.go
go run build.go
clean:
rm -f restic

243
build.go
View file

@ -3,22 +3,15 @@
// This program aims to make building Go programs for end users easier by just
// calling it with `go run`, without having to setup a GOPATH.
//
// For Go < 1.11, it'll create a new GOPATH in a temporary directory, then run
// `go build` on the package configured as Main in the Config struct.
//
// For Go >= 1.11 if the file go.mod is present, it'll use Go modules and not
// setup a GOPATH. It builds the package configured as Main in the Config
// struct with `go build -mod=vendor` to use the vendored dependencies.
// The variable GOPROXY is set to `off` so that no network calls are made. All
// files are copied to a temporary directory before `go build` is called within
// that directory.
// This program needs Go >= 1.11. It'll use Go modules for compilation. It
// builds the package configured as Main in the Config struct.
// BSD 2-Clause License
//
// Copyright (c) 2016-2018, Alexander Neumann <alexander@bumpern.de>
// All rights reserved.
//
// This file has been copied from the repository at:
// This file has been derived from the repository at:
// https://github.com/fd0/build-go
//
// Redistribution and use in source and binary forms, with or without
@ -80,124 +73,12 @@ type Config struct {
var (
verbose bool
keepGopath bool
runTests bool
enableCGO bool
enablePIE bool
goVersion = ParseGoVersion(runtime.Version())
)
// copy all Go files in src to dst, creating directories on the fly, so calling
//
// copy("/tmp/gopath/src/github.com/restic/restic", "/home/u/restic")
//
// with "/home/u/restic" containing the file "foo.go" yields the following tree
// at "/tmp/gopath":
//
// /tmp/gopath
// └── src
// └── github.com
// └── restic
// └── restic
// └── foo.go
func copy(dst, src string) error {
verbosePrintf("copy contents of %v to %v\n", src, dst)
return filepath.Walk(src, func(name string, fi os.FileInfo, err error) error {
if name == src {
return err
}
if name == ".git" {
return filepath.SkipDir
}
if err != nil {
return err
}
if fi.IsDir() {
return nil
}
intermediatePath, err := filepath.Rel(src, name)
if err != nil {
return err
}
fileSrc := filepath.Join(src, intermediatePath)
fileDst := filepath.Join(dst, intermediatePath)
return copyFile(fileDst, fileSrc)
})
}
func directoryExists(dirname string) bool {
stat, err := os.Stat(dirname)
if err != nil && os.IsNotExist(err) {
return false
}
return stat.IsDir()
}
func fileExists(filename string) bool {
stat, err := os.Stat(filename)
if err != nil && os.IsNotExist(err) {
return false
}
return stat.Mode().IsRegular()
}
// copyFile creates dst from src, preserving file attributes and timestamps.
func copyFile(dst, src string) error {
fi, err := os.Stat(src)
if err != nil {
return err
}
fsrc, err := os.Open(src)
if err != nil {
return err
}
if err = os.MkdirAll(filepath.Dir(dst), 0755); err != nil {
fmt.Printf("MkdirAll(%v)\n", filepath.Dir(dst))
return err
}
fdst, err := os.Create(dst)
if err != nil {
_ = fsrc.Close()
return err
}
_, err = io.Copy(fdst, fsrc)
if err != nil {
_ = fsrc.Close()
_ = fdst.Close()
return err
}
err = fdst.Close()
if err != nil {
_ = fsrc.Close()
return err
}
err = fsrc.Close()
if err != nil {
return err
}
err = os.Chmod(dst, fi.Mode())
if err != nil {
return err
}
return os.Chtimes(dst, fi.ModTime(), fi.ModTime())
}
// die prints the message with fmt.Fprintf() to stderr and exits with an error
// code.
func die(message string, args ...interface{}) {
@ -211,7 +92,6 @@ func showUsage(output io.Writer) {
fmt.Fprintf(output, "OPTIONS:\n")
fmt.Fprintf(output, " -v --verbose output more messages\n")
fmt.Fprintf(output, " -t --tags specify additional build tags\n")
fmt.Fprintf(output, " -k --keep-tempdir do not remove the temporary directory after build\n")
fmt.Fprintf(output, " -T --test run tests\n")
fmt.Fprintf(output, " -o --output set output file name\n")
fmt.Fprintf(output, " --enable-cgo use CGO to link against libc\n")
@ -219,7 +99,6 @@ func showUsage(output io.Writer) {
fmt.Fprintf(output, " --goos value set GOOS for cross-compilation\n")
fmt.Fprintf(output, " --goarch value set GOARCH for cross-compilation\n")
fmt.Fprintf(output, " --goarm value set GOARM for cross-compilation\n")
fmt.Fprintf(output, " --tempdir dir use a specific directory for compilation\n")
}
func verbosePrintf(message string, args ...interface{}) {
@ -230,49 +109,39 @@ func verbosePrintf(message string, args ...interface{}) {
fmt.Printf("build: "+message, args...)
}
// cleanEnv returns a clean environment with GOPATH, GOBIN and GO111MODULE
// removed (if present).
func cleanEnv() (env []string) {
removeKeys := map[string]struct{}{
"GOPATH": struct{}{},
"GOBIN": struct{}{},
"GO111MODULE": struct{}{},
}
for _, v := range os.Environ() {
data := strings.SplitN(v, "=", 2)
name := data[0]
if _, ok := removeKeys[name]; ok {
// printEnv prints Go-relevant environment variables in a nice way using verbosePrintf.
func printEnv(env []string) {
verbosePrintf("environment (GO*):\n")
for _, v := range env {
// ignore environment variables which do not start with GO*.
if !strings.HasPrefix(v, "GO") {
continue
}
env = append(env, v)
verbosePrintf(" %s\n", v)
}
return env
}
// build runs "go build args..." with GOPATH set to gopath.
func build(cwd string, env map[string]string, args ...string) error {
a := []string{"build"}
if goVersion.AtLeast(GoVersion{1, 10, 0}) {
verbosePrintf("Go version is at least 1.10, using new syntax for -gcflags\n")
// use new prefix
// try to remove all absolute paths from resulting binary
if goVersion.AtLeast(GoVersion{1, 13, 0}) {
// use the new flag introduced by Go 1.13
a = append(a, "-trimpath")
} else {
// otherwise try to trim as many paths as possible
a = append(a, "-asmflags", fmt.Sprintf("all=-trimpath=%s", cwd))
a = append(a, "-gcflags", fmt.Sprintf("all=-trimpath=%s", cwd))
} else {
a = append(a, "-asmflags", fmt.Sprintf("-trimpath=%s", cwd))
a = append(a, "-gcflags", fmt.Sprintf("-trimpath=%s", cwd))
}
if enablePIE {
a = append(a, "-buildmode=pie")
}
a = append(a, args...)
cmd := exec.Command("go", a...)
cmd.Env = append(cleanEnv(), "GOPROXY=off")
cmd.Env = os.Environ()
for k, v := range env {
cmd.Env = append(cmd.Env, k+"="+v)
}
@ -280,6 +149,8 @@ func build(cwd string, env map[string]string, args ...string) error {
cmd.Env = append(cmd.Env, "CGO_ENABLED=0")
}
printEnv(cmd.Env)
cmd.Dir = cwd
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
@ -294,7 +165,7 @@ func build(cwd string, env map[string]string, args ...string) error {
func test(cwd string, env map[string]string, args ...string) error {
args = append([]string{"test", "-count", "1"}, args...)
cmd := exec.Command("go", args...)
cmd.Env = append(cleanEnv(), "GOPROXY=off")
cmd.Env = os.Environ()
for k, v := range env {
cmd.Env = append(cmd.Env, k+"="+v)
}
@ -305,6 +176,8 @@ func test(cwd string, env map[string]string, args ...string) error {
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
printEnv(cmd.Env)
verbosePrintf("chdir %q\n", cwd)
verbosePrintf("go %q\n", args)
@ -454,6 +327,10 @@ func (v GoVersion) String() string {
}
func main() {
if !goVersion.AtLeast(GoVersion{1, 11, 0}) {
die("Go version (%v) is too old, Go <= 1.11 does not support Go Modules\n", goVersion)
}
if !goVersion.AtLeast(config.MinVersion) {
fmt.Fprintf(os.Stderr, "%s detected, this program requires at least %s\n", goVersion, config.MinVersion)
os.Exit(1)
@ -464,15 +341,13 @@ func main() {
skipNext := false
params := os.Args[1:]
goEnv := map[string]string{}
buildEnv := map[string]string{
env := map[string]string{
"GO111MODULE": "on", // make sure we build in Module mode
"GOOS": runtime.GOOS,
"GOARCH": runtime.GOARCH,
"GOARM": "",
}
tempdir := ""
var outputFilename string
for i, arg := range params {
@ -484,8 +359,6 @@ func main() {
switch arg {
case "-v", "--verbose":
verbose = true
case "-k", "--keep-gopath":
keepGopath = true
case "-t", "-tags", "--tags":
if i+1 >= len(params) {
die("-t given but no tag specified")
@ -495,9 +368,6 @@ func main() {
case "-o", "--output":
skipNext = true
outputFilename = params[i+1]
case "--tempdir":
skipNext = true
tempdir = params[i+1]
case "-T", "--test":
runTests = true
case "--enable-cgo":
@ -506,13 +376,13 @@ func main() {
enablePIE = true
case "--goos":
skipNext = true
buildEnv["GOOS"] = params[i+1]
env["GOOS"] = params[i+1]
case "--goarch":
skipNext = true
buildEnv["GOARCH"] = params[i+1]
env["GOARCH"] = params[i+1]
case "--goarm":
skipNext = true
buildEnv["GOARM"] = params[i+1]
env["GOARM"] = params[i+1]
case "-h":
showUsage(os.Stdout)
return
@ -538,7 +408,7 @@ func main() {
if outputFilename == "" {
outputFilename = config.Name
if buildEnv["GOOS"] == "windows" {
if env["GOOS"] == "windows" {
outputFilename += ".exe"
}
}
@ -567,49 +437,10 @@ func main() {
}
buildTarget := filepath.FromSlash(mainPackage)
buildCWD := ""
if goVersion.AtLeast(GoVersion{1, 11, 0}) && fileExists("go.mod") {
verbosePrintf("Go >= 1.11 and 'go.mod' found, building with modules\n")
buildCWD = root
buildArgs = append(buildArgs, "-mod=vendor")
testArgs = append(testArgs, "-mod=vendor")
goEnv["GO111MODULE"] = "on"
buildEnv["GO111MODULE"] = "on"
} else {
if tempdir == "" {
tempdir, err = ioutil.TempDir("", fmt.Sprintf("%v-build-", config.Name))
buildCWD, err := os.Getwd()
if err != nil {
die("TempDir(): %v\n", err)
die("unable to determine current working directory: %v\n", err)
}
}
verbosePrintf("Go < 1.11 or 'go.mod' not found, create GOPATH at %v\n", tempdir)
targetdir := filepath.Join(tempdir, "src", filepath.FromSlash(config.Namespace))
if err = copy(targetdir, root); err != nil {
die("copying files from %v to %v/src failed: %v\n", root, tempdir, err)
}
defer func() {
if !keepGopath {
verbosePrintf("remove %v\n", tempdir)
if err = os.RemoveAll(tempdir); err != nil {
die("remove GOPATH at %s failed: %v\n", tempdir, err)
}
} else {
verbosePrintf("leaving temporary GOPATH at %v\n", tempdir)
}
}()
buildCWD = targetdir
goEnv["GOPATH"] = tempdir
buildEnv["GOPATH"] = tempdir
}
verbosePrintf("environment:\n go: %v\n build: %v\n", goEnv, buildEnv)
buildArgs = append(buildArgs,
"-tags", strings.Join(buildTags, " "),
@ -617,7 +448,7 @@ func main() {
"-o", output, buildTarget,
)
err = build(buildCWD, buildEnv, buildArgs...)
err = build(buildCWD, env, buildArgs...)
if err != nil {
die("build failed: %v\n", err)
}
@ -627,7 +458,7 @@ func main() {
testArgs = append(testArgs, config.Tests...)
err = test(buildCWD, goEnv, testArgs...)
err = test(buildCWD, env, testArgs...)
if err != nil {
die("running tests failed: %v\n", err)
}