mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-10 04:57:26 +01:00
351 lines
9.7 KiB
Go
351 lines
9.7 KiB
Go
// Copyright 2019 The Ebiten Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// ebitenmobile is a wrapper of gomobile for Ebitengine.
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//
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// For the usage, see https://ebitengine.org/en/documents/mobile.html.
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//
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// ebitenmobile uses github.com/ebitengine/gomobile for gomobile, not golang.org/x/mobile.
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// gomobile's version is fixed by ebitenmobile.
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// You can specify gomobile's version by EBITENMOBILE_GOMOBILE environment variable.
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package main
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import (
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_ "embed"
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"flag"
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"fmt"
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"log"
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"os"
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"path/filepath"
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"strings"
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"text/template"
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"unicode"
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exec "golang.org/x/sys/execabs"
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"golang.org/x/tools/go/packages"
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)
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const (
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ebitenmobileCommand = "ebitenmobile"
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)
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//go:embed _files/EbitenViewController.h
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var objcH string
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func goEnv(name string) string {
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if val := os.Getenv(name); val != "" {
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return val
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}
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val, err := exec.Command("go", "env", name).Output()
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if err != nil {
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panic(err)
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}
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return strings.TrimSpace(string(val))
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}
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const (
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// Copied from gomobile.
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minAndroidAPI = 15
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)
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var (
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buildA bool // -a
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buildI bool // -i
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buildN bool // -n
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buildV bool // -v
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buildX bool // -x
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buildO string // -o
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buildGcflags string // -gcflags
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buildLdflags string // -ldflags
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buildTarget string // -target
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buildTrimpath bool // -trimpath
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buildWork bool // -work
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buildBundleID string // -bundleid
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buildIOSVersion string // -iosversion
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buildAndroidAPI int // -androidapi
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buildTags string // -tags
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bindPrefix string // -prefix
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bindJavaPkg string // -javapkg
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bindClasspath string // -classpath
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bindBootClasspath string // -bootclasspath
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)
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func main() {
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flag.Usage = func() {
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// This message is copied from `gomobile bind -h`
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fmt.Fprintf(os.Stderr, "%s bind [-target android|ios] [-bootclasspath <path>] [-classpath <path>] [-o output] [build flags] [package]\n", ebitenmobileCommand)
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os.Exit(2)
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}
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flag.Parse()
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args := flag.Args()
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if len(args) < 1 {
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flag.Usage()
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}
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if args[0] != "bind" {
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flag.Usage()
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}
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var flagset flag.FlagSet
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flagset.StringVar(&buildO, "o", "", "")
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flagset.StringVar(&buildGcflags, "gcflags", "", "")
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flagset.StringVar(&buildLdflags, "ldflags", "", "")
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flagset.StringVar(&buildTarget, "target", "android", "")
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flagset.StringVar(&buildBundleID, "bundleid", "", "")
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flagset.StringVar(&buildIOSVersion, "iosversion", "7.0", "")
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flagset.StringVar(&buildTags, "tags", "", "")
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flagset.IntVar(&buildAndroidAPI, "androidapi", minAndroidAPI, "")
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flagset.BoolVar(&buildA, "a", false, "")
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flagset.BoolVar(&buildI, "i", false, "")
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flagset.BoolVar(&buildN, "n", false, "")
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flagset.BoolVar(&buildV, "v", false, "")
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flagset.BoolVar(&buildX, "x", false, "")
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flagset.BoolVar(&buildTrimpath, "trimpath", false, "")
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flagset.BoolVar(&buildWork, "work", false, "")
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flagset.StringVar(&bindJavaPkg, "javapkg", "", "")
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flagset.StringVar(&bindPrefix, "prefix", "", "")
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flagset.StringVar(&bindClasspath, "classpath", "", "")
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flagset.StringVar(&bindBootClasspath, "bootclasspath", "", "")
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_ = flagset.Parse(args[1:])
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buildTarget, err := osFromBuildTarget(buildTarget)
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if err != nil {
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log.Fatal(err)
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}
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// Add ldflags to suppress linker errors (#932).
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// See https://github.com/golang/go/issues/17807
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if buildTarget == "android" {
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if buildLdflags != "" {
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buildLdflags += " "
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}
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buildLdflags += "-extldflags=-Wl,-soname,libgojni.so"
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if !isValidJavaPackageName(bindJavaPkg) {
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log.Fatalf("invalid Java package name: %s", bindJavaPkg)
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}
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}
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dir, err := prepareGomobileCommands()
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defer func() {
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if dir != "" && !buildWork {
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_ = removeAll(dir)
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}
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}()
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if err != nil {
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log.Fatal(err)
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}
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if err := doBind(args, &flagset, buildTarget); err != nil {
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log.Fatal(err)
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}
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}
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func osFromBuildTarget(buildTarget string) (string, error) {
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var os string
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for i, pair := range strings.Split(buildTarget, ",") {
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osarch := strings.SplitN(pair, "/", 2)
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if i == 0 {
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os = osarch[0]
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}
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if os != osarch[0] {
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return "", fmt.Errorf("ebitenmobile: cannot target different OSes")
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}
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}
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if os == "ios" {
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os = "darwin"
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}
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return os, nil
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}
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func doBind(args []string, flagset *flag.FlagSet, buildOS string) error {
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tags := buildTags
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cfg := &packages.Config{}
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cfg.Env = append(os.Environ(), "GOOS="+buildOS)
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if buildOS == "darwin" {
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if tags != "" {
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tags += " "
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}
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tags += "ios"
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}
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cfg.BuildFlags = []string{"-tags", tags}
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flagsetArgs := flagset.Args()
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if len(flagsetArgs) == 0 {
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flagsetArgs = []string{"."}
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}
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pkgs, err := packages.Load(cfg, flagsetArgs[0])
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if err != nil {
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return err
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}
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prefixLower := bindPrefix + pkgs[0].Name
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prefixUpper := strings.Title(bindPrefix) + strings.Title(pkgs[0].Name)
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args = append(args, "github.com/hajimehoshi/ebiten/v2/mobile/ebitenmobileview")
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if buildO == "" {
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fmt.Fprintln(os.Stderr, "-o must be specified.")
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os.Exit(2)
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return nil
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}
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if buildN {
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fmt.Print("gomobile")
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for _, arg := range args {
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fmt.Print(" ", arg)
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}
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fmt.Println()
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return nil
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}
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cmd := exec.Command("gomobile", args...)
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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if err := cmd.Run(); err != nil {
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os.Exit(err.(*exec.ExitError).ExitCode())
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return nil
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}
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replacePrefixes := func(content string) string {
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content = strings.ReplaceAll(content, "{{.PrefixUpper}}", prefixUpper)
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content = strings.ReplaceAll(content, "{{.PrefixLower}}", prefixLower)
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return content
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}
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if buildOS == "darwin" {
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// TODO: Use os.ReadDir after Ebitengine stops supporting Go 1.15.
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f, err := os.Open(buildO)
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if err != nil {
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return err
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}
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defer func() {
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_ = f.Close()
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}()
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names, err := f.Readdirnames(-1)
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if err != nil {
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return err
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}
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for _, name := range names {
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if name == "Info.plist" {
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continue
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}
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frameworkName := filepath.Base(buildO)
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frameworkNameBase := frameworkName[:len(frameworkName)-len(".xcframework")]
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// The first character must be an upper case (#2192).
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// TODO: strings.Title is used here for the consistency with gomobile (see cmd/gomobile/bind_iosapp.go).
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// As strings.Title is deprecated, golang.org/x/text/cases should be used.
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frameworkNameBase = strings.Title(frameworkNameBase)
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dir := filepath.Join(buildO, name, frameworkNameBase+".framework")
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if err := os.WriteFile(filepath.Join(dir, "Headers", prefixUpper+"EbitenViewController.h"), []byte(replacePrefixes(objcH)), 0644); err != nil {
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return err
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}
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// TODO: Remove 'Ebitenmobileview.objc.h' here. Now it is hard since there is a header file importing
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// that header file.
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fs, err := os.ReadDir(filepath.Join(dir, "Headers"))
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if err != nil {
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return err
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}
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var headerFiles []string
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for _, f := range fs {
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if strings.HasSuffix(f.Name(), ".h") {
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headerFiles = append(headerFiles, f.Name())
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}
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}
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w, err := os.OpenFile(filepath.Join(dir, "Modules", "module.modulemap"), os.O_WRONLY, 0644)
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if err != nil {
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return err
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}
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defer func() {
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_ = w.Close()
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}()
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var mmVals = struct {
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Module string
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Headers []string
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}{
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Module: prefixUpper,
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Headers: headerFiles,
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}
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if err := iosModuleMapTmpl.Execute(w, mmVals); err != nil {
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return err
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}
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// TODO: Remove Ebitenmobileview.objc.h?
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}
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}
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return nil
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}
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var iosModuleMapTmpl = template.Must(template.New("iosmmap").Parse(`framework module "{{.Module}}" {
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{{range .Headers}} header "{{.}}"
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{{end}}
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export *
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}`))
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func isValidJavaPackageName(name string) bool {
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if name == "" {
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return false
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}
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// A Java package name consists of one or more Java identifiers separated by dots.
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for _, token := range strings.Split(name, ".") {
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if !isValidJavaIdentifier(token) {
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return false
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}
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}
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return true
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}
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// isValidJavaIdentifier reports whether the given strings is a valid Java identifier.
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func isValidJavaIdentifier(name string) bool {
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if name == "" {
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return false
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}
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// Java identifiers must not be a Java keyword or a boolean/null literal.
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// https://docs.oracle.com/javase/specs/jls/se21/html/jls-3.html#jls-Identifier
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switch name {
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case "_", "abstract", "assert", "boolean", "break", "byte", "case", "catch", "char", "class", "const", "continue", "default", "do", "double", "else", "enum", "extends", "final", "finally", "float", "for", "goto", "if", "implements", "import", "instanceof", "int", "interface", "long", "native", "new", "package", "private", "protected", "public", "return", "short", "static", "strictfp", "super", "switch", "synchronized", "this", "throw", "throws", "transient", "try", "void", "volatile", "while":
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return false
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}
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if name == "null" || name == "true" || name == "false" {
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return false
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}
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// References:
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// * https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/lang/Character.html#isJavaIdentifierPart(int)
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// * https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/lang/Character.html#isJavaIdentifierStart(int)
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isJavaLetter := func(r rune) bool {
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return unicode.IsLetter(r) || unicode.Is(unicode.Pc, r) || unicode.Is(unicode.Sc, r)
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}
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isJavaDigit := unicode.IsDigit
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// A Java identifier is a Java letter or Java letter followed by Java letters or Java digits.
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// https://docs.oracle.com/javase/specs/jls/se21/html/jls-3.html#jls-Identifier
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for i, r := range name {
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if !isJavaLetter(r) && (i == 0 || !isJavaDigit(r)) {
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return false
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}
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}
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return true
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}
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