mirror of
https://git.sr.ht/~eliasnaur/gio
synced 2026-07-01 07:35:40 +00:00
Elias Naur
a12912c944
The `gio` name clashes with a widely deployed GNOME tool. Rename our tool to `gogio`, "the go tool for gio programs". Fixes gio#20 Signed-off-by: Elias Naur <mail@eliasnaur.com>
77 lines
1.7 KiB
Go
77 lines
1.7 KiB
Go
// SPDX-License-Identifier: Unlicense OR MIT
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package main
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import (
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"fmt"
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"io/ioutil"
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"os"
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"os/exec"
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"path/filepath"
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)
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func buildJS(bi *buildInfo) error {
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out := *destPath
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if out == "" {
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out = bi.name
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}
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if err := os.MkdirAll(out, 0700); err != nil {
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return err
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}
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cmd := exec.Command(
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"go",
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"build",
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"-ldflags="+bi.ldflags,
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"-o", filepath.Join(out, "main.wasm"),
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bi.pkg,
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)
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cmd.Env = append(
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os.Environ(),
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"GOOS=js",
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"GOARCH=wasm",
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)
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_, err := runCmd(cmd)
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if err != nil {
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return err
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}
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const indexhtml = `<!doctype html>
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<html>
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, user-scalable=no">
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<meta name="mobile-web-app-capable" content="yes">
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<script src="wasm_exec.js"></script>
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<script>
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if (!WebAssembly.instantiateStreaming) { // polyfill
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WebAssembly.instantiateStreaming = async (resp, importObject) => {
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const source = await (await resp).arrayBuffer();
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return await WebAssembly.instantiate(source, importObject);
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};
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}
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const go = new Go();
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WebAssembly.instantiateStreaming(fetch("main.wasm"), go.importObject).then((result) => {
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go.run(result.instance);
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});
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</script>
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<style>
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body,pre { margin:0;padding:0; }
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</style>
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</head>
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<body>
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</body>
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</html>`
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if err := ioutil.WriteFile(filepath.Join(out, "index.html"), []byte(indexhtml), 0600); err != nil {
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return err
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}
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goroot, err := runCmd(exec.Command("go", "env", "GOROOT"))
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if err != nil {
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return err
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}
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wasmjs := filepath.Join(goroot, "misc", "wasm", "wasm_exec.js")
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if _, err := os.Stat(wasmjs); err != nil {
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return fmt.Errorf("failed to find $GOROOT/misc/wasm/wasm_exec.js driver: %v", err)
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}
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return copyFile(filepath.Join(out, "wasm_exec.js"), wasmjs)
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}
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