mirror of
https://git.sr.ht/~eliasnaur/gio
synced 2026-07-01 15:45:38 +00:00
Robin Eklind
9cc90d9695
find gio/ -type f -name '*.go' | xargs -I '{}' goimports -w '{}'
Signed-off-by: Robin Eklind
167 lines
3.9 KiB
Go
167 lines
3.9 KiB
Go
// SPDX-License-Identifier: Unlicense OR MIT
|
|
|
|
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"io"
|
|
"io/ioutil"
|
|
"os"
|
|
"os/exec"
|
|
"path/filepath"
|
|
"strings"
|
|
|
|
"golang.org/x/tools/go/packages"
|
|
)
|
|
|
|
func buildJS(bi *buildInfo) error {
|
|
out := *destPath
|
|
if out == "" {
|
|
out = bi.name
|
|
}
|
|
if err := os.MkdirAll(out, 0700); err != nil {
|
|
return err
|
|
}
|
|
cmd := exec.Command(
|
|
"go",
|
|
"build",
|
|
"-ldflags="+bi.ldflags,
|
|
"-tags="+bi.tags,
|
|
"-o", filepath.Join(out, "main.wasm"),
|
|
bi.pkgPath,
|
|
)
|
|
cmd.Env = append(
|
|
os.Environ(),
|
|
"GOOS=js",
|
|
"GOARCH=wasm",
|
|
)
|
|
_, err := runCmd(cmd)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if err := ioutil.WriteFile(filepath.Join(out, "index.html"), []byte(jsIndex), 0600); err != nil {
|
|
return err
|
|
}
|
|
goroot, err := runCmd(exec.Command("go", "env", "GOROOT"))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
wasmJS := filepath.Join(goroot, "misc", "wasm", "wasm_exec.js")
|
|
if _, err := os.Stat(wasmJS); err != nil {
|
|
return fmt.Errorf("failed to find $GOROOT/misc/wasm/wasm_exec.js driver: %v", err)
|
|
}
|
|
pkgs, err := packages.Load(&packages.Config{
|
|
Mode: packages.NeedName | packages.NeedFiles | packages.NeedImports | packages.NeedDeps,
|
|
Env: append(os.Environ(), "GOOS=js", "GOARCH=wasm"),
|
|
}, bi.pkgPath)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
extraJS, err := findPackagesJS(pkgs[0], make(map[string]bool))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return mergeJSFiles(filepath.Join(out, "wasm.js"), append([]string{wasmJS}, extraJS...)...)
|
|
}
|
|
|
|
func findPackagesJS(p *packages.Package, visited map[string]bool) (extraJS []string, err error) {
|
|
if len(p.GoFiles) == 0 {
|
|
return nil, nil
|
|
}
|
|
js, err := filepath.Glob(filepath.Join(filepath.Dir(p.GoFiles[0]), "*_js.js"))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
extraJS = append(extraJS, js...)
|
|
for _, imp := range p.Imports {
|
|
if !visited[imp.ID] {
|
|
extra, err := findPackagesJS(imp, visited)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
extraJS = append(extraJS, extra...)
|
|
visited[imp.ID] = true
|
|
}
|
|
}
|
|
return extraJS, nil
|
|
}
|
|
|
|
// mergeJSFiles will merge all files into a single `wasm.js`. It will prepend the jsSetGo
|
|
// and append the jsStartGo.
|
|
func mergeJSFiles(dst string, files ...string) (err error) {
|
|
w, err := os.Create(dst)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer func() {
|
|
if cerr := w.Close(); err != nil {
|
|
err = cerr
|
|
}
|
|
}()
|
|
_, err = io.Copy(w, strings.NewReader(jsSetGo))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
for i := range files {
|
|
r, err := os.Open(files[i])
|
|
if err != nil {
|
|
return err
|
|
}
|
|
_, err = io.Copy(w, r)
|
|
r.Close()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
_, err = io.Copy(w, strings.NewReader(jsStartGo))
|
|
return err
|
|
}
|
|
|
|
const (
|
|
jsIndex = `<!doctype html>
|
|
<html>
|
|
<head>
|
|
<meta charset="utf-8">
|
|
<meta name="viewport" content="width=device-width, user-scalable=no">
|
|
<meta name="mobile-web-app-capable" content="yes">
|
|
<script src="wasm.js"></script>
|
|
<style>
|
|
body,pre { margin:0;padding:0; }
|
|
</style>
|
|
</head>
|
|
<body>
|
|
</body>
|
|
</html>`
|
|
// jsSetGo sets the `window.go` variable.
|
|
jsSetGo = `(() => {
|
|
window.go = {argv: [], env: {}, importObject: {go: {}}};
|
|
const argv = new URLSearchParams(location.search).get("argv");
|
|
if (argv) {
|
|
window.go["argv"] = argv.split(" ");
|
|
}
|
|
})();`
|
|
// jsStartGo initializes the main.wasm.
|
|
jsStartGo = `(() => {
|
|
defaultGo = new Go();
|
|
Object.assign(defaultGo["argv"], go["argv"]);
|
|
Object.assign(defaultGo["env"], go["env"]);
|
|
for (let key in go["importObject"]) {
|
|
if (typeof defaultGo["importObject"][key] === "undefined") {
|
|
defaultGo["importObject"][key] = {};
|
|
}
|
|
Object.assign(defaultGo["importObject"][key], go["importObject"][key]);
|
|
}
|
|
window.go = defaultGo;
|
|
if (!WebAssembly.instantiateStreaming) { // polyfill
|
|
WebAssembly.instantiateStreaming = async (resp, importObject) => {
|
|
const source = await (await resp).arrayBuffer();
|
|
return await WebAssembly.instantiate(source, importObject);
|
|
};
|
|
}
|
|
WebAssembly.instantiateStreaming(fetch("main.wasm"), go.importObject).then((result) => {
|
|
go.run(result.instance);
|
|
});
|
|
})();`
|
|
)
|