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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"bytes"
"fmt"
"os"
"os/exec"
"path/filepath"
"strings"
)
var cmdVersion = &command{
run: runVersion,
Name: "version",
Usage: "",
Short: "print version",
Long: `
Version prints versions of the gomobile binary and tools
`,
}
func runVersion(cmd *command) (err error) {
// Check this binary matches the version in golang.org/x/mobile/cmd/gomobile
// source code in GOPATH. If they don't match, currently there is no
// way to reliably identify the revision number this binary was built
// against.
version, err := func() (string, error) {
bin, err := exec.LookPath(os.Args[0])
if err != nil {
return "", err
}
bindir := filepath.Dir(bin)
cmd := exec.Command("go", "list", "-f", "{{.Stale}}", "golang.org/x/mobile/cmd/gomobile")
cmd.Env = append(os.Environ(), "GOBIN="+bindir)
out, err := cmd.CombinedOutput()
if err != nil {
return "", fmt.Errorf("cannot test gomobile binary: %v, %s", err, out)
}
if strings.TrimSpace(string(out)) != "false" {
return "", fmt.Errorf("binary is out of date, re-install it")
}
return mobileRepoRevision()
}()
if err != nil {
fmt.Printf("gomobile version unknown: %v\n", err)
return nil
}
// Supported platforms
platforms := "android"
if xcodeAvailable() {
platforms = "android,ios"
}
// ANDROID_HOME, sdk build tool version
androidapi, _ := androidAPIPath()
fmt.Printf("gomobile version %s (%s); androidSDK=%s\n", version, platforms, androidapi)
return nil
}
func mobileRepoRevision() (rev string, err error) {
b, err := exec.Command("go", "list", "-f", "{{.Dir}}", "golang.org/x/mobile/app").CombinedOutput()
if err != nil {
return "", fmt.Errorf("mobile repo not found: %v, %s", err, b)
}
repo := filepath.Dir(string(b))
if err := os.Chdir(repo); err != nil {
return "", fmt.Errorf("mobile repo %q not accessible: %v", repo, err)
}
revision, err := exec.Command("git", "log", "-n", "1", "--format=format: +%h %cd", "HEAD").CombinedOutput()
if err != nil {
return "", fmt.Errorf("mobile repo git log failed: %v, %s", err, revision)
}
return string(bytes.Trim(revision, " \t\r\n")), nil
}