mirror of
https://github.com/octoleo/restic.git
synced 2024-11-25 06:07:44 +00:00
build.go: Major rework, support Go modules
This commit is contained in:
Alexander Neumann
parent
71e0408390
commit
4734056583
291
build.go
291
build.go
@ -1,3 +1,18 @@
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// Description
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//
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// This program aims to make building Go programs for end users easier by just
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// calling it with `go run`, without having to setup a GOPATH.
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//
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// For Go < 1.11, it'll create a new GOPATH in a temporary directory, then run
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// `go build` on the package configured as Main in the Config struct.
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//
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// For Go >= 1.11 if the file go.mod is present, it'll use Go modules and not
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// setup a GOPATH. It builds the package configured as Main in the Config
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// struct with `go build -mod=vendor` to use the vendored dependencies.
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// The variable GOPROXY is set to `off` so that no network calls are made. All
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// files are copied to a temporary directory before `go build` is called within
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// that directory.
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// BSD 2-Clause License
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//
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// Copyright (c) 2016-2018, Alexander Neumann <alexander@bumpern.de>
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@ -37,7 +52,6 @@ import (
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"io/ioutil"
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"os"
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"os/exec"
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"path"
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"path/filepath"
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"runtime"
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"strconv"
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@ -46,15 +60,12 @@ import (
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// config contains the configuration for the program to build.
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var config = Config{
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Name: "restic", // name of the program executable and directory
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Namespace: "github.com/restic/restic", // subdir of GOPATH, e.g. "github.com/foo/bar"
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Main: "github.com/restic/restic/cmd/restic", // package name for the main package
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DefaultBuildTags: []string{"selfupdate"}, // specify build tags which are always used
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Tests: []string{ // tests to run
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"github.com/restic/restic/internal/...",
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"github.com/restic/restic/cmd/...",
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},
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MinVersion: GoVersion{Major: 1, Minor: 9, Patch: 0}, // minimum Go version supported
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Name: "restic", // name of the program executable and directory
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Namespace: "github.com/restic/restic", // subdir of GOPATH, e.g. "github.com/foo/bar"
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Main: "./cmd/restic", // package name for the main package
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DefaultBuildTags: []string{"selfupdate"}, // specify build tags which are always used
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Tests: []string{"./..."}, // tests to run
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MinVersion: GoVersion{Major: 1, Minor: 9, Patch: 0}, // minimum Go version supported
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}
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// Config configures the build.
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@ -73,41 +84,12 @@ var (
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runTests bool
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enableCGO bool
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enablePIE bool
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goVersion = ParseGoVersion(runtime.Version())
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)
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// specialDir returns true if the file begins with a special character ('.' or '_').
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func specialDir(name string) bool {
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if name == "." {
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return false
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}
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base := filepath.Base(name)
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if base == "vendor" || base[0] == '_' || base[0] == '.' {
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return true
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}
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return false
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}
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// excludePath returns true if the file should not be copied to the new GOPATH.
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func excludePath(name string) bool {
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ext := path.Ext(name)
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if ext == ".go" || ext == ".s" || ext == ".h" {
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return false
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}
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parentDir := filepath.Base(filepath.Dir(name))
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if parentDir == "testdata" {
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return false
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}
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return true
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}
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// updateGopath builds a valid GOPATH at dst, with all Go files in src/ copied
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// to dst/prefix/, so calling
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// copy all Go files in src to dst, creating directories on the fly, so calling
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//
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// updateGopath("/tmp/gopath", "/home/u/restic", "github.com/restic/restic")
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// copy("/tmp/gopath/src/github.com/restic/restic", "/home/u/restic")
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//
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// with "/home/u/restic" containing the file "foo.go" yields the following tree
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// at "/tmp/gopath":
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@ -118,19 +100,15 @@ func excludePath(name string) bool {
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// └── restic
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// └── restic
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// └── foo.go
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func updateGopath(dst, src, prefix string) error {
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verbosePrintf("copy contents of %v to %v\n", src, filepath.Join(dst, prefix))
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func copy(dst, src string) error {
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verbosePrintf("copy contents of %v to %v\n", src, dst)
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return filepath.Walk(src, func(name string, fi os.FileInfo, err error) error {
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if name == src {
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return err
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}
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if specialDir(name) {
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if fi.IsDir() {
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return filepath.SkipDir
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}
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return nil
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if name == ".git" {
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return filepath.SkipDir
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}
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if err != nil {
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@ -141,17 +119,13 @@ func updateGopath(dst, src, prefix string) error {
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return nil
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}
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if excludePath(name) {
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return nil
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}
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intermediatePath, err := filepath.Rel(src, name)
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if err != nil {
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return err
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}
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fileSrc := filepath.Join(src, intermediatePath)
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fileDst := filepath.Join(dst, "src", prefix, intermediatePath)
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fileDst := filepath.Join(dst, intermediatePath)
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return copyFile(fileDst, fileSrc)
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})
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@ -166,6 +140,15 @@ func directoryExists(dirname string) bool {
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return stat.IsDir()
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}
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func fileExists(filename string) bool {
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stat, err := os.Stat(filename)
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if err != nil && os.IsNotExist(err) {
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return false
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}
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return stat.Mode().IsRegular()
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}
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// copyFile creates dst from src, preserving file attributes and timestamps.
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func copyFile(dst, src string) error {
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fi, err := os.Stat(src)
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@ -185,30 +168,34 @@ func copyFile(dst, src string) error {
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fdst, err := os.Create(dst)
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if err != nil {
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_ = fsrc.Close()
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return err
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}
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if _, err = io.Copy(fdst, fsrc); err != nil {
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_, err = io.Copy(fdst, fsrc)
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if err != nil {
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_ = fsrc.Close()
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_ = fdst.Close()
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return err
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}
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if err == nil {
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err = fsrc.Close()
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err = fdst.Close()
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if err != nil {
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_ = fsrc.Close()
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return err
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}
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if err == nil {
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err = fdst.Close()
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err = fsrc.Close()
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if err != nil {
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return err
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}
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if err == nil {
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err = os.Chmod(dst, fi.Mode())
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err = os.Chmod(dst, fi.Mode())
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if err != nil {
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return err
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}
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if err == nil {
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err = os.Chtimes(dst, fi.ModTime(), fi.ModTime())
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}
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return err
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return os.Chtimes(dst, fi.ModTime(), fi.ModTime())
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}
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// die prints the message with fmt.Fprintf() to stderr and exits with an error
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@ -224,7 +211,7 @@ func showUsage(output io.Writer) {
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fmt.Fprintf(output, "OPTIONS:\n")
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fmt.Fprintf(output, " -v --verbose output more messages\n")
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fmt.Fprintf(output, " -t --tags specify additional build tags\n")
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fmt.Fprintf(output, " -k --keep-gopath do not remove the GOPATH after build\n")
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fmt.Fprintf(output, " -k --keep-tempdir do not remove the temporary directory after build\n")
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fmt.Fprintf(output, " -T --test run tests\n")
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fmt.Fprintf(output, " -o --output set output file name\n")
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fmt.Fprintf(output, " --enable-cgo use CGO to link against libc\n")
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@ -267,17 +254,17 @@ func cleanEnv() (env []string) {
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}
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// build runs "go build args..." with GOPATH set to gopath.
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func build(cwd string, ver GoVersion, goos, goarch, goarm, gopath string, args ...string) error {
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func build(cwd string, env map[string]string, args ...string) error {
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a := []string{"build"}
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if ver.AtLeast(GoVersion{1, 10, 0}) {
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if goVersion.AtLeast(GoVersion{1, 10, 0}) {
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verbosePrintf("Go version is at least 1.10, using new syntax for -gcflags\n")
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// use new prefix
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a = append(a, "-asmflags", fmt.Sprintf("all=-trimpath=%s", gopath))
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a = append(a, "-gcflags", fmt.Sprintf("all=-trimpath=%s", gopath))
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a = append(a, "-asmflags", fmt.Sprintf("all=-trimpath=%s", cwd))
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a = append(a, "-gcflags", fmt.Sprintf("all=-trimpath=%s", cwd))
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} else {
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a = append(a, "-asmflags", fmt.Sprintf("-trimpath=%s", gopath))
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a = append(a, "-gcflags", fmt.Sprintf("-trimpath=%s", gopath))
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a = append(a, "-asmflags", fmt.Sprintf("-trimpath=%s", cwd))
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a = append(a, "-gcflags", fmt.Sprintf("-trimpath=%s", cwd))
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}
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if enablePIE {
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a = append(a, "-buildmode=pie")
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@ -285,9 +272,9 @@ func build(cwd string, ver GoVersion, goos, goarch, goarm, gopath string, args .
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a = append(a, args...)
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cmd := exec.Command("go", a...)
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cmd.Env = append(cleanEnv(), "GOPROXY=off", "GOPATH="+gopath, "GOARCH="+goarch, "GOOS="+goos)
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if goarm != "" {
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cmd.Env = append(cmd.Env, "GOARM="+goarm)
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cmd.Env = append(cleanEnv(), "GOPROXY=off")
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for k, v := range env {
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cmd.Env = append(cmd.Env, k+"="+v)
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}
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if !enableCGO {
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cmd.Env = append(cmd.Env, "CGO_ENABLED=0")
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@ -296,20 +283,30 @@ func build(cwd string, ver GoVersion, goos, goarch, goarm, gopath string, args .
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cmd.Dir = cwd
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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verbosePrintf("go %s\n", a)
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verbosePrintf("chdir %q\n", cwd)
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verbosePrintf("go %q\n", a)
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return cmd.Run()
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}
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// test runs "go test args..." with GOPATH set to gopath.
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func test(cwd, gopath string, args ...string) error {
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args = append([]string{"test"}, args...)
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func test(cwd string, env map[string]string, args ...string) error {
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args = append([]string{"test", "-count", "1"}, args...)
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cmd := exec.Command("go", args...)
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cmd.Env = append(cleanEnv(), "GOPATH="+gopath)
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cmd.Env = append(cleanEnv(), "GOPROXY=off")
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for k, v := range env {
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cmd.Env = append(cmd.Env, k+"="+v)
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}
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if !enableCGO {
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cmd.Env = append(cmd.Env, "CGO_ENABLED=0")
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}
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cmd.Dir = cwd
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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verbosePrintf("go %s\n", args)
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verbosePrintf("chdir %q\n", cwd)
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verbosePrintf("go %q\n", args)
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return cmd.Run()
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}
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@ -457,9 +454,8 @@ func (v GoVersion) String() string {
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}
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func main() {
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ver := ParseGoVersion(runtime.Version())
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if !ver.AtLeast(config.MinVersion) {
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fmt.Fprintf(os.Stderr, "%s detected, this program requires at least %s\n", ver, config.MinVersion)
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if !goVersion.AtLeast(config.MinVersion) {
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fmt.Fprintf(os.Stderr, "%s detected, this program requires at least %s\n", goVersion, config.MinVersion)
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os.Exit(1)
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}
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@ -468,11 +464,14 @@ func main() {
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skipNext := false
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params := os.Args[1:]
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targetGOOS := runtime.GOOS
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targetGOARCH := runtime.GOARCH
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targetGOARM := ""
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goEnv := map[string]string{}
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buildEnv := map[string]string{
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"GOOS": runtime.GOOS,
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"GOARCH": runtime.GOARCH,
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"GOARM": "",
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}
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gopath := ""
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tempdir := ""
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var outputFilename string
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@ -498,7 +497,7 @@ func main() {
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outputFilename = params[i+1]
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case "--tempdir":
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skipNext = true
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gopath = params[i+1]
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tempdir = params[i+1]
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case "-T", "--test":
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runTests = true
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case "--enable-cgo":
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@ -507,13 +506,13 @@ func main() {
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enablePIE = true
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case "--goos":
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skipNext = true
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targetGOOS = params[i+1]
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buildEnv["GOOS"] = params[i+1]
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case "--goarch":
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skipNext = true
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targetGOARCH = params[i+1]
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buildEnv["GOARCH"] = params[i+1]
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case "--goarm":
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skipNext = true
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targetGOARM = params[i+1]
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buildEnv["GOARM"] = params[i+1]
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case "-h":
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showUsage(os.Stdout)
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return
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@ -524,7 +523,7 @@ func main() {
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}
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}
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verbosePrintf("detected Go version %v\n", ver)
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verbosePrintf("detected Go version %v\n", goVersion)
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if len(buildTags) == 0 {
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verbosePrintf("adding build-tag release\n")
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@ -542,50 +541,16 @@ func main() {
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die("Getwd(): %v\n", err)
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}
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if gopath == "" {
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gopath, err = ioutil.TempDir("", fmt.Sprintf("%v-build-", config.Name))
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if err != nil {
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die("TempDir(): %v\n", err)
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}
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}
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verbosePrintf("create GOPATH at %v\n", gopath)
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if err = updateGopath(gopath, root, config.Namespace); err != nil {
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die("copying files from %v/src to %v/src failed: %v\n", root, gopath, err)
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}
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vendor := filepath.Join(root, "vendor")
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if directoryExists(vendor) {
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if err = updateGopath(gopath, vendor, filepath.Join(config.Namespace, "vendor")); err != nil {
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die("copying files from %v to %v failed: %v\n", root, gopath, err)
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}
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}
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defer func() {
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if !keepGopath {
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verbosePrintf("remove %v\n", gopath)
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if err = os.RemoveAll(gopath); err != nil {
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die("remove GOPATH at %s failed: %v\n", gopath, err)
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}
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} else {
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verbosePrintf("leaving temporary GOPATH at %v\n", gopath)
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}
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}()
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if outputFilename == "" {
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outputFilename = config.Name
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if targetGOOS == "windows" {
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if buildEnv["GOOS"] == "windows" {
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outputFilename += ".exe"
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}
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}
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cwd, err := os.Getwd()
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if err != nil {
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die("Getwd() returned %v\n", err)
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}
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output := outputFilename
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if !filepath.IsAbs(output) {
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output = filepath.Join(cwd, output)
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output = filepath.Join(root, output)
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}
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version := getVersion()
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@ -596,13 +561,65 @@ func main() {
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ldflags := "-s -w " + constants.LDFlags()
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verbosePrintf("ldflags: %s\n", ldflags)
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args := []string{
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"-tags", strings.Join(buildTags, " "),
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"-ldflags", ldflags,
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"-o", output, config.Main,
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var (
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buildArgs []string
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testArgs []string
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)
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mainPackage := config.Main
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if strings.HasPrefix(mainPackage, config.Namespace) {
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mainPackage = strings.Replace(mainPackage, config.Namespace, "./", 1)
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}
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err = build(filepath.Join(gopath, "src"), ver, targetGOOS, targetGOARCH, targetGOARM, gopath, args...)
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buildTarget := filepath.FromSlash(mainPackage)
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buildCWD := ""
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if goVersion.AtLeast(GoVersion{1, 11, 0}) && fileExists("go.mod") {
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verbosePrintf("Go >= 1.11 and 'go.mod' found, building with modules\n")
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buildCWD = root
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buildArgs = append(buildArgs, "-mod=vendor")
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testArgs = append(testArgs, "-mod=vendor")
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} else {
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if tempdir == "" {
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tempdir, err = ioutil.TempDir("", fmt.Sprintf("%v-build-", config.Name))
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if err != nil {
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die("TempDir(): %v\n", err)
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}
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}
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verbosePrintf("Go < 1.11 or 'go.mod' not found, create GOPATH at %v\n", tempdir)
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targetdir := filepath.Join(tempdir, "src", filepath.FromSlash(config.Namespace))
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if err = copy(targetdir, root); err != nil {
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die("copying files from %v to %v/src failed: %v\n", root, tempdir, err)
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}
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defer func() {
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if !keepGopath {
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verbosePrintf("remove %v\n", tempdir)
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if err = os.RemoveAll(tempdir); err != nil {
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die("remove GOPATH at %s failed: %v\n", tempdir, err)
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}
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} else {
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verbosePrintf("leaving temporary GOPATH at %v\n", tempdir)
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}
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}()
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buildCWD = targetdir
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goEnv["GOPATH"] = tempdir
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buildEnv["GOPATH"] = tempdir
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}
|
||||
|
||||
verbosePrintf("environment:\n go: %v\n build: %v\n", goEnv, buildEnv)
|
||||
|
||||
buildArgs = append(buildArgs,
|
||||
"-tags", strings.Join(buildTags, " "),
|
||||
"-ldflags", ldflags,
|
||||
"-o", output, buildTarget,
|
||||
)
|
||||
|
||||
err = build(buildCWD, buildEnv, buildArgs...)
|
||||
if err != nil {
|
||||
die("build failed: %v\n", err)
|
||||
}
|
||||
@ -610,7 +627,9 @@ func main() {
|
||||
if runTests {
|
||||
verbosePrintf("running tests\n")
|
||||
|
||||
err = test(filepath.Join(gopath, "src"), gopath, config.Tests...)
|
||||
testArgs = append(testArgs, config.Tests...)
|
||||
|
||||
err = test(buildCWD, goEnv, testArgs...)
|
||||
if err != nil {
|
||||
die("running tests failed: %v\n", err)
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user