Adding upstream version 0.0~git20250520.a1d9079+dfsg.

Signed-off-by: Daniel Baumann <daniel@debian.org>

cmd/gomobile/main.go

@@ -0,0 +1,209 @@
+// 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
+
+//go:generate gomobile help documentation doc.go
+
+import (
+	"bufio"
+	"bytes"
+	"flag"
+	"fmt"
+	"html/template"
+	"io"
+	"log"
+	"os"
+	"os/exec"
+	"unicode"
+	"unicode/utf8"
+)
+
+var (
+	gomobileName = "gomobile"
+	goVersion    string
+)
+
+const minimumGoMinorVersion = 18
+
+func printUsage(w io.Writer) {
+	bufw := bufio.NewWriter(w)
+	if err := usageTmpl.Execute(bufw, commands); err != nil {
+		panic(err)
+	}
+	bufw.Flush()
+}
+
+func main() {
+	gomobileName = os.Args[0]
+	flag.Usage = func() {
+		printUsage(os.Stderr)
+		os.Exit(2)
+	}
+	flag.Parse()
+	log.SetFlags(0)
+
+	args := flag.Args()
+	if len(args) < 1 {
+		flag.Usage()
+	}
+
+	if args[0] == "help" {
+		if len(args) == 3 && args[1] == "documentation" {
+			helpDocumentation(args[2])
+			return
+		}
+		help(args[1:])
+		return
+	}
+
+	if _, err := ensureGoVersion(); err != nil {
+		fmt.Fprintf(os.Stderr, "%s: %v\n", gomobileName, err)
+		os.Exit(1)
+	}
+
+	for _, cmd := range commands {
+		if cmd.Name == args[0] {
+			cmd.flag.Usage = func() {
+				cmd.usage()
+				os.Exit(1)
+			}
+			cmd.flag.Parse(args[1:])
+			if err := cmd.run(cmd); err != nil {
+				msg := err.Error()
+				if msg != "" {
+					fmt.Fprintf(os.Stderr, "%s: %v\n", os.Args[0], err)
+				}
+				os.Exit(1)
+			}
+			return
+		}
+	}
+	fmt.Fprintf(os.Stderr, "%s: unknown subcommand %q\nRun 'gomobile help' for usage.\n", os.Args[0], args[0])
+	os.Exit(2)
+}
+
+func ensureGoVersion() (string, error) {
+	if goVersion != "" {
+		return goVersion, nil
+	}
+
+	goVersionOut, err := exec.Command("go", "version").CombinedOutput()
+	if err != nil {
+		return "", fmt.Errorf("'go version' failed: %v, %s", err, goVersionOut)
+	}
+	var minor int
+	if _, err := fmt.Sscanf(string(goVersionOut), "go version go1.%d", &minor); err != nil {
+		// Ignore unknown versions; it's probably a devel version.
+		return "", nil
+	}
+	goVersion = fmt.Sprintf("go1.%d", minor)
+	if minor < minimumGoMinorVersion {
+		return "", fmt.Errorf("Go 1.%d or newer is required", minimumGoMinorVersion)
+	}
+	return goVersion, nil
+}
+
+func help(args []string) {
+	if len(args) == 0 {
+		printUsage(os.Stdout)
+		return // succeeded at helping
+	}
+	if len(args) != 1 {
+		fmt.Fprintf(os.Stderr, "usage: %s help command\n\nToo many arguments given.\n", gomobileName)
+		os.Exit(2) // failed to help
+	}
+
+	arg := args[0]
+	for _, cmd := range commands {
+		if cmd.Name == arg {
+			cmd.usage()
+			return // succeeded at helping
+		}
+	}
+
+	fmt.Fprintf(os.Stderr, "Unknown help topic %#q.  Run '%s help'.\n", arg, gomobileName)
+	os.Exit(2)
+}
+
+const documentationHeader = `// 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.
+
+// Code generated by 'gomobile help documentation doc.go'. DO NOT EDIT.
+`
+
+func helpDocumentation(path string) {
+	w := new(bytes.Buffer)
+	w.WriteString(documentationHeader)
+	w.WriteString("\n/*\n")
+	if err := usageTmpl.Execute(w, commands); err != nil {
+		log.Fatal(err)
+	}
+
+	for _, cmd := range commands {
+		r, rlen := utf8.DecodeRuneInString(cmd.Short)
+		w.WriteString("\n\n")
+		w.WriteRune(unicode.ToUpper(r))
+		w.WriteString(cmd.Short[rlen:])
+		w.WriteString("\n\nUsage:\n\n\tgomobile " + cmd.Name)
+		if cmd.Usage != "" {
+			w.WriteRune(' ')
+			w.WriteString(cmd.Usage)
+		}
+		w.WriteRune('\n')
+		w.WriteString(cmd.Long)
+	}
+
+	w.WriteString("*/\npackage main // import \"golang.org/x/mobile/cmd/gomobile\"\n")
+
+	if err := os.WriteFile(path, w.Bytes(), 0666); err != nil {
+		log.Fatal(err)
+	}
+}
+
+var commands = []*command{
+	// TODO(crawshaw): cmdRun
+	cmdBind,
+	cmdBuild,
+	cmdClean,
+	cmdInit,
+	cmdInstall,
+	cmdVersion,
+}
+
+type command struct {
+	run   func(*command) error
+	flag  flag.FlagSet
+	Name  string
+	Usage string
+	Short string
+	Long  string
+}
+
+func (cmd *command) usage() {
+	fmt.Fprintf(os.Stdout, "usage: %s %s %s\n%s", gomobileName, cmd.Name, cmd.Usage, cmd.Long)
+}
+
+var usageTmpl = template.Must(template.New("usage").Parse(
+	`Gomobile is a tool for building and running mobile apps written in Go.
+
+To install:
+
+	$ go install golang.org/x/mobile/cmd/gomobile@latest
+	$ gomobile init
+
+At least Go 1.16 is required.
+For detailed instructions, see https://golang.org/wiki/Mobile.
+
+Usage:
+
+	gomobile command [arguments]
+
+Commands:
+{{range .}}
+	{{.Name | printf "%-11s"}} {{.Short}}{{end}}
+
+Use 'gomobile help [command]' for more information about that command.
+`))