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🐛 Fixed golang prettier plugin issue

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landaiqing
2025-09-19 18:39:41 +08:00
parent 9cbbf729c0
commit cd027097f8
12 changed files with 572 additions and 1140 deletions
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frontend/public/wasm_exec.js
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// Copyright 2018 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.
"use strict";
(() => {
const enosys = () => {
const err = new Error("not implemented");
err.code = "ENOSYS";
return err;
};
if (!globalThis.fs) {
let outputBuf = "";
globalThis.fs = {
constants: { O_WRONLY: -1, O_RDWR: -1, O_CREAT: -1, O_TRUNC: -1, O_APPEND: -1, O_EXCL: -1 }, // unused
writeSync(fd, buf) {
outputBuf += decoder.decode(buf);
const nl = outputBuf.lastIndexOf("\n");
if (nl != -1) {
console.log(outputBuf.substring(0, nl));
outputBuf = outputBuf.substring(nl + 1);
}
return buf.length;
},
write(fd, buf, offset, length, position, callback) {
if (offset !== 0 || length !== buf.length || position !== null) {
callback(enosys());
return;
}
const n = this.writeSync(fd, buf);
callback(null, n);
},
chmod(path, mode, callback) { callback(enosys()); },
chown(path, uid, gid, callback) { callback(enosys()); },
close(fd, callback) { callback(enosys()); },
fchmod(fd, mode, callback) { callback(enosys()); },
fchown(fd, uid, gid, callback) { callback(enosys()); },
fstat(fd, callback) { callback(enosys()); },
fsync(fd, callback) { callback(null); },
ftruncate(fd, length, callback) { callback(enosys()); },
lchown(path, uid, gid, callback) { callback(enosys()); },
link(path, link, callback) { callback(enosys()); },
lstat(path, callback) { callback(enosys()); },
mkdir(path, perm, callback) { callback(enosys()); },
open(path, flags, mode, callback) { callback(enosys()); },
read(fd, buffer, offset, length, position, callback) { callback(enosys()); },
readdir(path, callback) { callback(enosys()); },
readlink(path, callback) { callback(enosys()); },
rename(from, to, callback) { callback(enosys()); },
rmdir(path, callback) { callback(enosys()); },
stat(path, callback) { callback(enosys()); },
symlink(path, link, callback) { callback(enosys()); },
truncate(path, length, callback) { callback(enosys()); },
unlink(path, callback) { callback(enosys()); },
utimes(path, atime, mtime, callback) { callback(enosys()); },
};
}
if (!globalThis.process) {
globalThis.process = {
getuid() { return -1; },
getgid() { return -1; },
geteuid() { return -1; },
getegid() { return -1; },
getgroups() { throw enosys(); },
pid: -1,
ppid: -1,
umask() { throw enosys(); },
cwd() { throw enosys(); },
chdir() { throw enosys(); },
}
}
if (!globalThis.crypto) {
throw new Error("globalThis.crypto is not available, polyfill required (crypto.getRandomValues only)");
}
if (!globalThis.performance) {
throw new Error("globalThis.performance is not available, polyfill required (performance.now only)");
}
if (!globalThis.TextEncoder) {
throw new Error("globalThis.TextEncoder is not available, polyfill required");
}
if (!globalThis.TextDecoder) {
throw new Error("globalThis.TextDecoder is not available, polyfill required");
}
const encoder = new TextEncoder("utf-8");
const decoder = new TextDecoder("utf-8");
globalThis.Go = class {
constructor() {
this.argv = ["js"];
this.env = {};
this.exit = (code) => {
if (code !== 0) {
console.warn("exit code:", code);
}
};
this._exitPromise = new Promise((resolve) => {
this._resolveExitPromise = resolve;
});
this._pendingEvent = null;
this._scheduledTimeouts = new Map();
this._nextCallbackTimeoutID = 1;
const setInt64 = (addr, v) => {
this.mem.setUint32(addr + 0, v, true);
this.mem.setUint32(addr + 4, Math.floor(v / 4294967296), true);
}
const setInt32 = (addr, v) => {
this.mem.setUint32(addr + 0, v, true);
}
const getInt64 = (addr) => {
const low = this.mem.getUint32(addr + 0, true);
const high = this.mem.getInt32(addr + 4, true);
return low + high * 4294967296;
}
const loadValue = (addr) => {
const f = this.mem.getFloat64(addr, true);
if (f === 0) {
return undefined;
}
if (!isNaN(f)) {
return f;
}
const id = this.mem.getUint32(addr, true);
return this._values[id];
}
const storeValue = (addr, v) => {
const nanHead = 0x7FF80000;
if (typeof v === "number" && v !== 0) {
if (isNaN(v)) {
this.mem.setUint32(addr + 4, nanHead, true);
this.mem.setUint32(addr, 0, true);
return;
}
this.mem.setFloat64(addr, v, true);
return;
}
if (v === undefined) {
this.mem.setFloat64(addr, 0, true);
return;
}
let id = this._ids.get(v);
if (id === undefined) {
id = this._idPool.pop();
if (id === undefined) {
id = this._values.length;
}
this._values[id] = v;
this._goRefCounts[id] = 0;
this._ids.set(v, id);
}
this._goRefCounts[id]++;
let typeFlag = 0;
switch (typeof v) {
case "object":
if (v !== null) {
typeFlag = 1;
}
break;
case "string":
typeFlag = 2;
break;
case "symbol":
typeFlag = 3;
break;
case "function":
typeFlag = 4;
break;
}
this.mem.setUint32(addr + 4, nanHead | typeFlag, true);
this.mem.setUint32(addr, id, true);
}
const loadSlice = (addr) => {
const array = getInt64(addr + 0);
const len = getInt64(addr + 8);
return new Uint8Array(this._inst.exports.mem.buffer, array, len);
}
const loadSliceOfValues = (addr) => {
const array = getInt64(addr + 0);
const len = getInt64(addr + 8);
const a = new Array(len);
for (let i = 0; i < len; i++) {
a[i] = loadValue(array + i * 8);
}
return a;
}
const loadString = (addr) => {
const saddr = getInt64(addr + 0);
const len = getInt64(addr + 8);
return decoder.decode(new DataView(this._inst.exports.mem.buffer, saddr, len));
}
const timeOrigin = Date.now() - performance.now();
this.importObject = {
_gotest: {
add: (a, b) => a + b,
},
gojs: {
// Go's SP does not change as long as no Go code is running. Some operations (e.g. calls, getters and setters)
// may synchronously trigger a Go event handler. This makes Go code get executed in the middle of the imported
// function. A goroutine can switch to a new stack if the current stack is too small (see morestack function).
// This changes the SP, thus we have to update the SP used by the imported function.
// func wasmExit(code int32)
"runtime.wasmExit": (sp) => {
sp >>>= 0;
const code = this.mem.getInt32(sp + 8, true);
this.exited = true;
delete this._inst;
delete this._values;
delete this._goRefCounts;
delete this._ids;
delete this._idPool;
this.exit(code);
},
// func wasmWrite(fd uintptr, p unsafe.Pointer, n int32)
"runtime.wasmWrite": (sp) => {
sp >>>= 0;
const fd = getInt64(sp + 8);
const p = getInt64(sp + 16);
const n = this.mem.getInt32(sp + 24, true);
fs.writeSync(fd, new Uint8Array(this._inst.exports.mem.buffer, p, n));
},
// func resetMemoryDataView()
"runtime.resetMemoryDataView": (sp) => {
sp >>>= 0;
this.mem = new DataView(this._inst.exports.mem.buffer);
},
// func nanotime1() int64
"runtime.nanotime1": (sp) => {
sp >>>= 0;
setInt64(sp + 8, (timeOrigin + performance.now()) * 1000000);
},
// func walltime() (sec int64, nsec int32)
"runtime.walltime": (sp) => {
sp >>>= 0;
const msec = (new Date).getTime();
setInt64(sp + 8, msec / 1000);
this.mem.setInt32(sp + 16, (msec % 1000) * 1000000, true);
},
// func scheduleTimeoutEvent(delay int64) int32
"runtime.scheduleTimeoutEvent": (sp) => {
sp >>>= 0;
const id = this._nextCallbackTimeoutID;
this._nextCallbackTimeoutID++;
this._scheduledTimeouts.set(id, setTimeout(
() => {
this._resume();
while (this._scheduledTimeouts.has(id)) {
// for some reason Go failed to register the timeout event, log and try again
// (temporary workaround for https://github.com/golang/go/issues/28975)
console.warn("scheduleTimeoutEvent: missed timeout event");
this._resume();
}
},
getInt64(sp + 8),
));
this.mem.setInt32(sp + 16, id, true);
},
// func clearTimeoutEvent(id int32)
"runtime.clearTimeoutEvent": (sp) => {
sp >>>= 0;
const id = this.mem.getInt32(sp + 8, true);
clearTimeout(this._scheduledTimeouts.get(id));
this._scheduledTimeouts.delete(id);
},
// func getRandomData(r []byte)
"runtime.getRandomData": (sp) => {
sp >>>= 0;
crypto.getRandomValues(loadSlice(sp + 8));
},
// func finalizeRef(v ref)
"syscall/js.finalizeRef": (sp) => {
sp >>>= 0;
const id = this.mem.getUint32(sp + 8, true);
this._goRefCounts[id]--;
if (this._goRefCounts[id] === 0) {
const v = this._values[id];
this._values[id] = null;
this._ids.delete(v);
this._idPool.push(id);
}
},
// func stringVal(value string) ref
"syscall/js.stringVal": (sp) => {
sp >>>= 0;
storeValue(sp + 24, loadString(sp + 8));
},
// func valueGet(v ref, p string) ref
"syscall/js.valueGet": (sp) => {
sp >>>= 0;
const result = Reflect.get(loadValue(sp + 8), loadString(sp + 16));
sp = this._inst.exports.getsp() >>> 0; // see comment above
storeValue(sp + 32, result);
},
// func valueSet(v ref, p string, x ref)
"syscall/js.valueSet": (sp) => {
sp >>>= 0;
Reflect.set(loadValue(sp + 8), loadString(sp + 16), loadValue(sp + 32));
},
// func valueDelete(v ref, p string)
"syscall/js.valueDelete": (sp) => {
sp >>>= 0;
Reflect.deleteProperty(loadValue(sp + 8), loadString(sp + 16));
},
// func valueIndex(v ref, i int) ref
"syscall/js.valueIndex": (sp) => {
sp >>>= 0;
storeValue(sp + 24, Reflect.get(loadValue(sp + 8), getInt64(sp + 16)));
},
// valueSetIndex(v ref, i int, x ref)
"syscall/js.valueSetIndex": (sp) => {
sp >>>= 0;
Reflect.set(loadValue(sp + 8), getInt64(sp + 16), loadValue(sp + 24));
},
// func valueCall(v ref, m string, args []ref) (ref, bool)
"syscall/js.valueCall": (sp) => {
sp >>>= 0;
try {
const v = loadValue(sp + 8);
const m = Reflect.get(v, loadString(sp + 16));
const args = loadSliceOfValues(sp + 32);
const result = Reflect.apply(m, v, args);
sp = this._inst.exports.getsp() >>> 0; // see comment above
storeValue(sp + 56, result);
this.mem.setUint8(sp + 64, 1);
} catch (err) {
sp = this._inst.exports.getsp() >>> 0; // see comment above
storeValue(sp + 56, err);
this.mem.setUint8(sp + 64, 0);
}
},
// func valueInvoke(v ref, args []ref) (ref, bool)
"syscall/js.valueInvoke": (sp) => {
sp >>>= 0;
try {
const v = loadValue(sp + 8);
const args = loadSliceOfValues(sp + 16);
const result = Reflect.apply(v, undefined, args);
sp = this._inst.exports.getsp() >>> 0; // see comment above
storeValue(sp + 40, result);
this.mem.setUint8(sp + 48, 1);
} catch (err) {
sp = this._inst.exports.getsp() >>> 0; // see comment above
storeValue(sp + 40, err);
this.mem.setUint8(sp + 48, 0);
}
},
// func valueNew(v ref, args []ref) (ref, bool)
"syscall/js.valueNew": (sp) => {
sp >>>= 0;
try {
const v = loadValue(sp + 8);
const args = loadSliceOfValues(sp + 16);
const result = Reflect.construct(v, args);
sp = this._inst.exports.getsp() >>> 0; // see comment above
storeValue(sp + 40, result);
this.mem.setUint8(sp + 48, 1);
} catch (err) {
sp = this._inst.exports.getsp() >>> 0; // see comment above
storeValue(sp + 40, err);
this.mem.setUint8(sp + 48, 0);
}
},
// func valueLength(v ref) int
"syscall/js.valueLength": (sp) => {
sp >>>= 0;
setInt64(sp + 16, parseInt(loadValue(sp + 8).length));
},
// valuePrepareString(v ref) (ref, int)
"syscall/js.valuePrepareString": (sp) => {
sp >>>= 0;
const str = encoder.encode(String(loadValue(sp + 8)));
storeValue(sp + 16, str);
setInt64(sp + 24, str.length);
},
// valueLoadString(v ref, b []byte)
"syscall/js.valueLoadString": (sp) => {
sp >>>= 0;
const str = loadValue(sp + 8);
loadSlice(sp + 16).set(str);
},
// func valueInstanceOf(v ref, t ref) bool
"syscall/js.valueInstanceOf": (sp) => {
sp >>>= 0;
this.mem.setUint8(sp + 24, (loadValue(sp + 8) instanceof loadValue(sp + 16)) ? 1 : 0);
},
// func copyBytesToGo(dst []byte, src ref) (int, bool)
"syscall/js.copyBytesToGo": (sp) => {
sp >>>= 0;
const dst = loadSlice(sp + 8);
const src = loadValue(sp + 32);
if (!(src instanceof Uint8Array || src instanceof Uint8ClampedArray)) {
this.mem.setUint8(sp + 48, 0);
return;
}
const toCopy = src.subarray(0, dst.length);
dst.set(toCopy);
setInt64(sp + 40, toCopy.length);
this.mem.setUint8(sp + 48, 1);
},
// func copyBytesToJS(dst ref, src []byte) (int, bool)
"syscall/js.copyBytesToJS": (sp) => {
sp >>>= 0;
const dst = loadValue(sp + 8);
const src = loadSlice(sp + 16);
if (!(dst instanceof Uint8Array || dst instanceof Uint8ClampedArray)) {
this.mem.setUint8(sp + 48, 0);
return;
}
const toCopy = src.subarray(0, dst.length);
dst.set(toCopy);
setInt64(sp + 40, toCopy.length);
this.mem.setUint8(sp + 48, 1);
},
"debug": (value) => {
console.log(value);
},
}
};
}
async run(instance) {
if (!(instance instanceof WebAssembly.Instance)) {
throw new Error("Go.run: WebAssembly.Instance expected");
}
this._inst = instance;
this.mem = new DataView(this._inst.exports.mem.buffer);
this._values = [ // JS values that Go currently has references to, indexed by reference id
NaN,
0,
null,
true,
false,
globalThis,
this,
];
this._goRefCounts = new Array(this._values.length).fill(Infinity); // number of references that Go has to a JS value, indexed by reference id
this._ids = new Map([ // mapping from JS values to reference ids
[0, 1],
[null, 2],
[true, 3],
[false, 4],
[globalThis, 5],
[this, 6],
]);
this._idPool = []; // unused ids that have been garbage collected
this.exited = false; // whether the Go program has exited
// Pass command line arguments and environment variables to WebAssembly by writing them to the linear memory.
let offset = 4096;
const strPtr = (str) => {
const ptr = offset;
const bytes = encoder.encode(str + "\0");
new Uint8Array(this.mem.buffer, offset, bytes.length).set(bytes);
offset += bytes.length;
if (offset % 8 !== 0) {
offset += 8 - (offset % 8);
}
return ptr;
};
const argc = this.argv.length;
const argvPtrs = [];
this.argv.forEach((arg) => {
argvPtrs.push(strPtr(arg));
});
argvPtrs.push(0);
const keys = Object.keys(this.env).sort();
keys.forEach((key) => {
argvPtrs.push(strPtr(`${key}=${this.env[key]}`));
});
argvPtrs.push(0);
const argv = offset;
argvPtrs.forEach((ptr) => {
this.mem.setUint32(offset, ptr, true);
this.mem.setUint32(offset + 4, 0, true);
offset += 8;
});
// The linker guarantees global data starts from at least wasmMinDataAddr.
// Keep in sync with cmd/link/internal/ld/data.go:wasmMinDataAddr.
const wasmMinDataAddr = 4096 + 8192;
if (offset >= wasmMinDataAddr) {
throw new Error("total length of command line and environment variables exceeds limit");
}
this._inst.exports.run(argc, argv);
if (this.exited) {
this._resolveExitPromise();
}
await this._exitPromise;
}
_resume() {
if (this.exited) {
throw new Error("Go program has already exited");
}
this._inst.exports.resume();
if (this.exited) {
this._resolveExitPromise();
}
}
_makeFuncWrapper(id) {
const go = this;
return function () {
const event = { id: id, this: this, args: arguments };
go._pendingEvent = event;
go._resume();
return event.result;
};
}
}
})();

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frontend/src/common/prettier/plugins/go/build-tinygo.bat Normal file
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@@ -0,0 +1,42 @@
@echo off
rem Build script for Go Prettier Plugin WASM using TinyGo
rem This script compiles the Go code to WebAssembly for browser environment
echo Building Go Prettier Plugin WASM with TinyGo...
rem Check if TinyGo is available
tinygo version >nul 2>&1
if errorlevel 1 (
echo TinyGo not found! Please install TinyGo first.
echo Visit: https://tinygo.org/getting-started/install/
pause
exit /b 1
)
rem Display TinyGo version
echo Using TinyGo version:
tinygo version
rem Build the WASM file using TinyGo
echo Compiling main.go to go.wasm with TinyGo...
tinygo build -o go-format.wasm -target wasm main.go
if errorlevel 1 (
echo Build failed!
pause
exit /b 1
)
echo Build successful!
rem Show file size (Windows version)
for %%A in (go.wasm) do echo WASM file size: %%~zA bytes
rem Copy to public directory for browser access
if exist "..\..\..\..\..\public" (
copy go.wasm ..\..\..\..\..\public\go.wasm > nul
echo Copied to public directory
del go.wasm
echo Cleaned up local WASM file
)
echo Go Prettier Plugin WASM (TinyGo) is ready!

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frontend/src/common/prettier/plugins/go/build-tinygo.sh Normal file
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#!/bin/bash
# Build script for Go Prettier Plugin WASM using TinyGo
# This script compiles the Go code to WebAssembly for browser environment
echo "Building Go Prettier Plugin WASM with TinyGo..."
# Check if TinyGo is available
if ! command -v tinygo &> /dev/null; then
echo "TinyGo not found! Please install TinyGo first."
echo "Visit: https://tinygo.org/getting-started/install/"
exit 1
fi
# Display TinyGo version
echo "Using TinyGo version: $(tinygo version)"
# Build the WASM file using TinyGo
echo "Compiling main.go to go.wasm with TinyGo..."
tinygo build -o go-format.wasm -target wasm main.go
if [ $? -ne 0 ]; then
echo "Build failed!"
exit 1
fi
echo "Build successful!"
echo "WASM file size: $(du -h go-format.wasm | cut -f1)"
# Copy to public directory for browser access
if [ -d "../../../../../public" ]; then
cp go-format.wasm ../../../../../public/go-format.wasm
echo "Copied to public directory"
rm go-format.wasm
echo "Cleaned up local WASM file"
fi
echo "Go Prettier Plugin WASM (TinyGo) is ready!"

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frontend/src/common/prettier/plugins/go/build.bat
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@@ -1,32 +1,43 @@
@echo off
rem Build script for Go Prettier Plugin WASM
rem This script compiles the Go code to WebAssembly
rem Build script for Go Prettier Plugin WASM using native Go
rem This script compiles the Go code to WebAssembly for browser environment
echo 🔨 Building Go Prettier Plugin WASM...
echo Building Go Prettier Plugin WASM with native Go...
rem Set WASM build environment
rem Check if Go is available
go version >nul 2>&1
if %ERRORLEVEL% NEQ 0 (
echo Go not found! Please install Go 1.21+ first.
echo Visit: https://golang.org/dl/
pause
exit /b 1
)
rem Set WASM build environment for browser (js/wasm)
set GOOS=js
set GOARCH=wasm
rem Build the WASM file
echo Compiling main.go to go.wasm...
go build -o go.wasm main.go
rem Build the WASM file using native Go
echo Compiling main.go to go.wasm with Go...
go build -o go-format.wasm main.go
if %ERRORLEVEL% EQU 0 (
echo ✅ Build successful!
echo Build successful!
rem Show file size (Windows version)
for %%A in (go.wasm) do echo 📊 WASM file size: %%~zA bytes
for %%A in (go.wasm) do echo WASM file size: %%~zA bytes
rem Copy to public directory for browser access
if exist "..\..\..\..\..\public" (
copy go.wasm ..\..\..\..\..\public\go.wasm > nul
echo 📋 Copied to public directory
echo Copied to public directory
del go.wasm
echo Cleaned up local WASM file
)
echo 🎉 Go Prettier Plugin WASM is ready!
echo Go Prettier Plugin WASM is ready!
) else (
echo ❌ Build failed!
echo Build failed!
pause
exit /b 1
)
)

40
frontend/src/common/prettier/plugins/go/build.sh
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@@ -1,30 +1,42 @@
#!/bin/bash
# Build script for Go Prettier Plugin WASM
# This script compiles the Go code to WebAssembly
# Build script for Go Prettier Plugin WASM using native Go
# This script compiles the Go code to WebAssembly for browser environment
echo "🔨 Building Go Prettier Plugin WASM..."
echo "Building Go Prettier Plugin WASM with native Go..."
# Set WASM build environment
# Check if Go is available
if ! command -v go &> /dev/null; then
echo "Go not found! Please install Go 1.21+ first."
echo "Visit: https://golang.org/dl/"
exit 1
fi
# Display Go version
echo "Using Go version: $(go version)"
# Set WASM build environment for browser (js/wasm)
export GOOS=js
export GOARCH=wasm
# Build the WASM file
echo "Compiling main.go to go.wasm..."
go build -o go.wasm main.go
# Build the WASM file using native Go
echo "Compiling main.go to go.wasm with Go..."
go build -o go-format.wasm main.go
if [ $? -eq 0 ]; then
echo "✅ Build successful!"
echo "📊 WASM file size: $(du -h go.wasm | cut -f1)"
echo "Build successful!"
echo "WASM file size: $(du -h go-format.wasm | cut -f1)"
# Copy to public directory for browser access
if [ -d "../../../../../public" ]; then
cp go.wasm ../../../../../public/go.wasm
echo "📋 Copied to public directory"
cp go-format.wasm ../../../../../public/go-format.wasm
echo "Copied to public directory"
rm go-format.wasm
echo "Cleaned up local WASM file"
fi
echo "🎉 Go Prettier Plugin WASM is ready!"
echo "Go Prettier Plugin WASM is ready!"
else
echo "❌ Build failed!"
echo "Build failed!"
exit 1
fi
fi

366
frontend/src/common/prettier/plugins/go/go.mjs
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@@ -1,244 +1,142 @@
/**
* Go Prettier Plugin - Universal Implementation
* WebAssembly-based Go code formatter for Prettier
* Supports both Node.js and Browser environments
* @fileoverview Go Prettier Format Plugin
* A Prettier plugin for formatting Go code using WebAssembly.
* This plugin leverages Go's native formatting capabilities through WASM.
*/
import "./wasm_exec.js"
/** @type {Promise<void>|null} */
let initializePromise;
let initializePromise = null;
// Environment detection
const isNode = () => {
return typeof process !== 'undefined' &&
process.versions != null &&
process.versions.node != null;
};
const isBrowser = () => {
return typeof window !== 'undefined' &&
typeof document !== 'undefined';
};
// Node.js WASM loading
const loadWasmNode = async () => {
try {
const fs = await import('fs');
const path = await import('path');
const { fileURLToPath } = await import('url');
const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
const wasmPath = path.join(__dirname, 'go.wasm');
return fs.readFileSync(wasmPath);
} catch (error) {
console.error('Node.js WASM loading failed:', error);
throw error;
}
};
// Browser WASM loading
const loadWasmBrowser = async () => {
try {
const response = await fetch('/go.wasm');
if (!response.ok) {
throw new Error(`Failed to load WASM file: ${response.status} ${response.statusText}`);
}
return await response.arrayBuffer();
} catch (error) {
console.error('Browser WASM loading failed:', error);
throw error;
}
};
// Node.js Go runtime initialization
const initGoRuntimeNode = async () => {
if (globalThis.Go) return;
try {
// Dynamic import of wasm_exec.js for Node.js
const { createRequire } = await import('module');
const require = createRequire(import.meta.url);
const path = await import('path');
const { fileURLToPath } = await import('url');
const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
// Load wasm_exec.js
const wasmExecPath = path.join(__dirname, 'wasm_exec.js');
require(wasmExecPath);
if (!globalThis.Go) {
throw new Error('Go WASM runtime not available after loading wasm_exec.js');
}
} catch (error) {
console.error('Node.js Go runtime initialization failed:', error);
throw error;
}
};
// Browser Go runtime initialization
const initGoRuntimeBrowser = async () => {
// 总是重新初始化，因为可能存在版本不兼容问题
try {
// 移除旧的 Go 运行时
delete globalThis.Go;
// 动态导入本地的 wasm_exec.js 内容
const wasmExecResponse = await fetch('/wasm_exec.js');
if (!wasmExecResponse.ok) {
throw new Error(`Failed to fetch wasm_exec.js: ${wasmExecResponse.status}`);
}
const wasmExecCode = await wasmExecResponse.text();
// 在全局作用域中执行 wasm_exec.js 代码
const script = document.createElement('script');
script.textContent = wasmExecCode;
document.head.appendChild(script);
// 等待一小段时间确保脚本执行完成
await new Promise(resolve => setTimeout(resolve, 100));
if (!globalThis.Go) {
throw new Error('Go WASM runtime not available after executing wasm_exec.js');
}
console.log('Go runtime initialized successfully');
} catch (error) {
console.error('Browser Go runtime initialization failed:', error);
throw error;
}
};
// Universal initialization
const initialize = async () => {
if (initializePromise) return initializePromise;
initializePromise = (async () => {
let wasmBuffer;
console.log('Starting Go WASM initialization...');
// Environment-specific initialization
if (isNode()) {
console.log('Initializing for Node.js environment');
await initGoRuntimeNode();
wasmBuffer = await loadWasmNode();
} else if (isBrowser()) {
console.log('Initializing for Browser environment');
await initGoRuntimeBrowser();
wasmBuffer = await loadWasmBrowser();
} else {
throw new Error('Unsupported environment: neither Node.js nor Browser detected');
}
console.log('Creating Go instance...');
const go = new globalThis.Go();
// 详细检查 importObject
console.log('Go import object keys:', Object.keys(go.importObject));
if (go.importObject.gojs) {
console.log('gojs import keys:', Object.keys(go.importObject.gojs));
console.log('scheduleTimeoutEvent type:', typeof go.importObject.gojs['runtime.scheduleTimeoutEvent']);
}
console.log('Instantiating WebAssembly module...');
try {
const { instance } = await WebAssembly.instantiate(wasmBuffer, go.importObject);
console.log('WebAssembly instantiation successful');
console.log('Running Go program...');
// Run Go program (don't await as it's a long-running service)
go.run(instance).catch(err => {
console.error('Go WASM program exit error:', err);
});
} catch (instantiateError) {
console.error('WebAssembly instantiation failed:', instantiateError);
console.error('Error details:', {
message: instantiateError.message,
name: instantiateError.name,
stack: instantiateError.stack
});
throw instantiateError;
}
// Wait for Go program to initialize and expose formatGo function
console.log('Waiting for formatGo function to be available...');
let retries = 0;
const maxRetries = 20; // 增加重试次数
while (typeof globalThis.formatGo !== 'function' && retries < maxRetries) {
await new Promise(resolve => setTimeout(resolve, 200)); // 增加等待时间
retries++;
if (retries % 5 === 0) {
console.log(`Waiting for formatGo function... (${retries}/${maxRetries})`);
}
}
if (typeof globalThis.formatGo !== 'function') {
throw new Error('Go WASM module not properly initialized - formatGo function not available after 20 retries');
}
console.log('Go WASM initialization completed successfully');
})();
/**
* Initializes the Go WebAssembly module for formatting Go code.
* This function sets up the WASM runtime and makes the formatGo function
* available on the global object.
*
* @async
* @function initialize
* @returns {Promise<void>} A promise that resolves when the WASM module is ready
* @throws {Error} If the WASM file cannot be loaded or instantiated
*/
function initialize() {
if (initializePromise) {
return initializePromise;
};
}
export const languages = [
{
name: "Go",
parsers: ["go-format"],
extensions: [".go"],
vscodeLanguageIds: ["go"],
},
initializePromise = (async () => {
const go = new TinyGo();
// Load WASM file from browser
const response = await fetch('/go-format.wasm');
if (!response.ok) {
throw new Error(`Failed to load WASM file: ${response.status} ${response.statusText}`);
}
const wasmBuffer = await response.arrayBuffer();
const { instance } = await WebAssembly.instantiate(
wasmBuffer,
go.importObject
);
// go.run returns a promise that resolves when the go program exits.
// Since our program is a long-running service (it exposes a function and waits),
// we don't await it.
go.run(instance);
// The `formatGo` function is now available on the global object.
})();
return initializePromise;
}
/**
* Prettier language configuration for Go.
* Defines the language settings, file extensions, and parser mappings.
*
* @type {Array<Object>}
* @property {string} name - The display name of the language
* @property {string[]} parsers - Array of parser names for this language
* @property {string[]} extensions - File extensions associated with this language
* @property {string[]} vscodeLanguageIds - VSCode language identifier mappings
*/
const languages = [
{
name: "Go",
parsers: ["go-format"],
extensions: [".go"],
vscodeLanguageIds: ["go"],
},
];
export const parsers = {
"go-format": {
parse: (text) => text,
astFormat: "go-format",
locStart: (node) => 0,
locEnd: (node) => node.length,
/**
* Prettier parser configuration for Go.
* Defines how Go source code should be parsed and processed.
*
* @type {Object<string, Object>}
* @property {Object} go-format - Go language parser configuration
* @property {Function} go-format.parse - Parser function that returns the input text as-is
* @property {string} go-format.astFormat - AST format identifier for the printer
* @property {Function} go-format.locStart - Function to get the start location of a node
* @property {Function} go-format.locEnd - Function to get the end location of a node
*/
const parsers = {
"go-format": {
/**
* Parse Go source code. For this plugin, we pass through the text as-is
* since the actual formatting is handled by the Go WASM module.
*
* @param {string} text - The Go source code to parse
* @returns {string} The input text unchanged
*/
parse: (text) => text,
astFormat: "go-format",
// These are required for Prettier to work
/**
* Get the start location of a node in the source code.
*
* @param {string} node - The node (in this case, the source text)
* @returns {number} Always returns 0 as we treat the entire text as one node
*/
locStart: (node) => 0,
/**
* Get the end location of a node in the source code.
*
* @param {string} node - The node (in this case, the source text)
* @returns {number} The length of the text
*/
locEnd: (node) => node.length,
},
};
/**
* Prettier printer configuration for Go.
* Defines how the parsed Go AST should be formatted back to text.
*
* @type {Object<string, Object>}
* @property {Object} go-format - Go formatting printer configuration
* @property {Function} go-format.print - Async function that formats Go code
*/
const printers = {
"go-format": {
/**
* Format Go source code using the WebAssembly Go formatter.
* This function initializes the WASM module if needed and calls the
* global formatGo function exposed by the Go program.
*
* @async
* @param {Object} path - Prettier's path object containing the source code
* @param {Function} path.getValue - Function to get the current node value
* @returns {Promise<string>} The formatted Go source code
* @throws {Error} If the WASM module fails to initialize or format the code
*/
print: async (path) => {
// The WASM module must be initialized before we can format.
await initialize();
const text = path.getValue();
// The `formatGo` function is exposed on the global object by our Go program.
return globalThis.formatGo(text);
},
},
};
export const printers = {
"go-format": {
print: (path) => {
const text = path.getValue();
if (typeof globalThis.formatGo !== 'function') {
// 如果 formatGo 函数不可用，尝试初始化
initialize().then(() => {
// 初始化完成后，formatGo 应该可用
}).catch(err => {
console.error('Go WASM initialization failed:', err);
});
// 如果还是不可用，返回原始文本
return text;
}
try {
return globalThis.formatGo(text);
} catch (error) {
console.error('Go formatting failed:', error);
// 返回原始文本而不是抛出错误
return text;
}
},
},
};
// Export initialize function for manual initialization
export { initialize };
// Default export for Prettier plugin compatibility
export default {
languages,
parsers,
printers
};
export default { languages, parsers, printers, initialize };

BIN
frontend/src/common/prettier/plugins/go/go.wasm
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4
frontend/src/common/prettier/plugins/go/main.go
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@@ -4,8 +4,8 @@
// functionality for the Prettier plugin. This package exposes the formatGo function
// to JavaScript, enabling web-based Go code formatting using Go's built-in format package.
//
// The module is designed to be compiled to WebAssembly and loaded in Node.js
// environments as part of the go-prettier-format plugin.
// The module is designed to be compiled to WebAssembly using native Go (GOOS=js GOARCH=wasm)
// and loaded in browser environments as part of the Go Prettier plugin.
package main
import (

622
frontend/src/common/prettier/plugins/go/wasm_exec.js
View File

@@ -1,26 +1,53 @@
// Copyright 2018 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.
"use strict";
//
// This file has been modified for use by the TinyGo compiler.
(() => {
// Map multiple JavaScript environments to a single common API,
// preferring web standards over Node.js API.
//
// Environments considered:
// - Browsers
// - Node.js
// - Electron
// - Parcel
if (typeof global !== "undefined") {
// global already exists
} else if (typeof window !== "undefined") {
window.global = window;
} else if (typeof self !== "undefined") {
self.global = self;
} else {
throw new Error("cannot export Go (neither global, window nor self is defined)");
}
if (!global.require && typeof require !== "undefined") {
global.require = require;
}
if (!global.fs && global.require) {
global.fs = require("node:fs");
}
const enosys = () => {
const err = new Error("not implemented");
err.code = "ENOSYS";
return err;
};
if (!globalThis.fs) {
if (!global.fs) {
let outputBuf = "";
globalThis.fs = {
global.fs = {
constants: { O_WRONLY: -1, O_RDWR: -1, O_CREAT: -1, O_TRUNC: -1, O_APPEND: -1, O_EXCL: -1 }, // unused
writeSync(fd, buf) {
outputBuf += decoder.decode(buf);
const nl = outputBuf.lastIndexOf("\n");
if (nl != -1) {
console.log(outputBuf.substring(0, nl));
outputBuf = outputBuf.substring(nl + 1);
console.log(outputBuf.substr(0, nl));
outputBuf = outputBuf.substr(nl + 1);
}
return buf.length;
},
@@ -58,8 +85,8 @@
};
}
if (!globalThis.process) {
globalThis.process = {
if (!global.process) {
global.process = {
getuid() { return -1; },
getgid() { return -1; },
geteuid() { return -1; },
@@ -73,58 +100,53 @@
}
}
if (!globalThis.crypto) {
throw new Error("globalThis.crypto is not available, polyfill required (crypto.getRandomValues only)");
if (!global.crypto) {
const nodeCrypto = require("node:crypto");
global.crypto = {
getRandomValues(b) {
nodeCrypto.randomFillSync(b);
},
};
}
if (!globalThis.performance) {
throw new Error("globalThis.performance is not available, polyfill required (performance.now only)");
if (!global.performance) {
global.performance = {
now() {
const [sec, nsec] = process.hrtime();
return sec * 1000 + nsec / 1000000;
},
};
}
if (!globalThis.TextEncoder) {
throw new Error("globalThis.TextEncoder is not available, polyfill required");
if (!global.TextEncoder) {
global.TextEncoder = require("node:util").TextEncoder;
}
if (!globalThis.TextDecoder) {
throw new Error("globalThis.TextDecoder is not available, polyfill required");
if (!global.TextDecoder) {
global.TextDecoder = require("node:util").TextDecoder;
}
// End of polyfills for common API.
const encoder = new TextEncoder("utf-8");
const decoder = new TextDecoder("utf-8");
let reinterpretBuf = new DataView(new ArrayBuffer(8));
var logLine = [];
const wasmExit = {}; // thrown to exit via proc_exit (not an error)
globalThis.Go = class {
global.TinyGo = class {
constructor() {
this.argv = ["js"];
this.env = {};
this.exit = (code) => {
if (code !== 0) {
console.warn("exit code:", code);
}
};
this._exitPromise = new Promise((resolve) => {
this._resolveExitPromise = resolve;
});
this._pendingEvent = null;
this._scheduledTimeouts = new Map();
this._callbackTimeouts = new Map();
this._nextCallbackTimeoutID = 1;
const setInt64 = (addr, v) => {
this.mem.setUint32(addr + 0, v, true);
this.mem.setUint32(addr + 4, Math.floor(v / 4294967296), true);
const mem = () => {
// The buffer may change when requesting more memory.
return new DataView(this._inst.exports.memory.buffer);
}
const setInt32 = (addr, v) => {
this.mem.setUint32(addr + 0, v, true);
}
const getInt64 = (addr) => {
const low = this.mem.getUint32(addr + 0, true);
const high = this.mem.getInt32(addr + 4, true);
return low + high * 4294967296;
}
const loadValue = (addr) => {
const f = this.mem.getFloat64(addr, true);
const unboxValue = (v_ref) => {
reinterpretBuf.setBigInt64(0, v_ref, true);
const f = reinterpretBuf.getFloat64(0, true);
if (f === 0) {
return undefined;
}
@@ -132,69 +154,77 @@
return f;
}
const id = this.mem.getUint32(addr, true);
const id = v_ref & 0xffffffffn;
return this._values[id];
}
const storeValue = (addr, v) => {
const nanHead = 0x7FF80000;
if (typeof v === "number" && v !== 0) {
const loadValue = (addr) => {
let v_ref = mem().getBigUint64(addr, true);
return unboxValue(v_ref);
}
const boxValue = (v) => {
const nanHead = 0x7FF80000n;
if (typeof v === "number") {
if (isNaN(v)) {
this.mem.setUint32(addr + 4, nanHead, true);
this.mem.setUint32(addr, 0, true);
return;
return nanHead << 32n;
}
this.mem.setFloat64(addr, v, true);
return;
if (v === 0) {
return (nanHead << 32n) | 1n;
}
reinterpretBuf.setFloat64(0, v, true);
return reinterpretBuf.getBigInt64(0, true);
}
if (v === undefined) {
this.mem.setFloat64(addr, 0, true);
return;
switch (v) {
case undefined:
return 0n;
case null:
return (nanHead << 32n) | 2n;
case true:
return (nanHead << 32n) | 3n;
case false:
return (nanHead << 32n) | 4n;
}
let id = this._ids.get(v);
if (id === undefined) {
id = this._idPool.pop();
if (id === undefined) {
id = this._values.length;
id = BigInt(this._values.length);
}
this._values[id] = v;
this._goRefCounts[id] = 0;
this._ids.set(v, id);
}
this._goRefCounts[id]++;
let typeFlag = 0;
let typeFlag = 1n;
switch (typeof v) {
case "object":
if (v !== null) {
typeFlag = 1;
}
break;
case "string":
typeFlag = 2;
typeFlag = 2n;
break;
case "symbol":
typeFlag = 3;
typeFlag = 3n;
break;
case "function":
typeFlag = 4;
typeFlag = 4n;
break;
}
this.mem.setUint32(addr + 4, nanHead | typeFlag, true);
this.mem.setUint32(addr, id, true);
return id | ((nanHead | typeFlag) << 32n);
}
const loadSlice = (addr) => {
const array = getInt64(addr + 0);
const len = getInt64(addr + 8);
return new Uint8Array(this._inst.exports.mem.buffer, array, len);
const storeValue = (addr, v) => {
let v_ref = boxValue(v);
mem().setBigUint64(addr, v_ref, true);
}
const loadSliceOfValues = (addr) => {
const array = getInt64(addr + 0);
const len = getInt64(addr + 8);
const loadSlice = (array, len, cap) => {
return new Uint8Array(this._inst.exports.memory.buffer, array, len);
}
const loadSliceOfValues = (array, len, cap) => {
const a = new Array(len);
for (let i = 0; i < len; i++) {
a[i] = loadValue(array + i * 8);
@@ -202,347 +232,287 @@
return a;
}
const loadString = (addr) => {
const saddr = getInt64(addr + 0);
const len = getInt64(addr + 8);
return decoder.decode(new DataView(this._inst.exports.mem.buffer, saddr, len));
const loadString = (ptr, len) => {
return decoder.decode(new DataView(this._inst.exports.memory.buffer, ptr, len));
}
const timeOrigin = Date.now() - performance.now();
this.importObject = {
_gotest: {
add: (a, b) => a + b,
wasi_snapshot_preview1: {
// https://github.com/WebAssembly/WASI/blob/main/phases/snapshot/docs.md#fd_write
fd_write: function(fd, iovs_ptr, iovs_len, nwritten_ptr) {
let nwritten = 0;
if (fd == 1) {
for (let iovs_i=0; iovs_i<iovs_len;iovs_i++) {
let iov_ptr = iovs_ptr+iovs_i*8; // assuming wasm32
let ptr = mem().getUint32(iov_ptr + 0, true);
let len = mem().getUint32(iov_ptr + 4, true);
nwritten += len;
for (let i=0; i<len; i++) {
let c = mem().getUint8(ptr+i);
if (c == 13) { // CR
// ignore
} else if (c == 10) { // LF
// write line
let line = decoder.decode(new Uint8Array(logLine));
logLine = [];
console.log(line);
} else {
logLine.push(c);
}
}
}
} else {
console.error('invalid file descriptor:', fd);
}
mem().setUint32(nwritten_ptr, nwritten, true);
return 0;
},
fd_close: () => 0, // dummy
fd_fdstat_get: () => 0, // dummy
fd_seek: () => 0, // dummy
proc_exit: (code) => {
this.exited = true;
this.exitCode = code;
this._resolveExitPromise();
throw wasmExit;
},
random_get: (bufPtr, bufLen) => {
crypto.getRandomValues(loadSlice(bufPtr, bufLen));
return 0;
},
},
gojs: {
// Go's SP does not change as long as no Go code is running. Some operations (e.g. calls, getters and setters)
// may synchronously trigger a Go event handler. This makes Go code get executed in the middle of the imported
// function. A goroutine can switch to a new stack if the current stack is too small (see morestack function).
// This changes the SP, thus we have to update the SP used by the imported function.
// func wasmExit(code int32)
"runtime.wasmExit": (sp) => {
sp >>>= 0;
const code = this.mem.getInt32(sp + 8, true);
this.exited = true;
delete this._inst;
delete this._values;
delete this._goRefCounts;
delete this._ids;
delete this._idPool;
this.exit(code);
// func ticks() int64
"runtime.ticks": () => {
return BigInt((timeOrigin + performance.now()) * 1e6);
},
// func wasmWrite(fd uintptr, p unsafe.Pointer, n int32)
"runtime.wasmWrite": (sp) => {
sp >>>= 0;
const fd = getInt64(sp + 8);
const p = getInt64(sp + 16);
const n = this.mem.getInt32(sp + 24, true);
fs.writeSync(fd, new Uint8Array(this._inst.exports.mem.buffer, p, n));
},
// func resetMemoryDataView()
"runtime.resetMemoryDataView": (sp) => {
sp >>>= 0;
this.mem = new DataView(this._inst.exports.mem.buffer);
},
// func nanotime1() int64
"runtime.nanotime1": (sp) => {
sp >>>= 0;
setInt64(sp + 8, (timeOrigin + performance.now()) * 1000000);
},
// func walltime() (sec int64, nsec int32)
"runtime.walltime": (sp) => {
sp >>>= 0;
const msec = (new Date).getTime();
setInt64(sp + 8, msec / 1000);
this.mem.setInt32(sp + 16, (msec % 1000) * 1000000, true);
},
// func scheduleTimeoutEvent(delay int64) int32
"runtime.scheduleTimeoutEvent": (sp) => {
sp >>>= 0;
const id = this._nextCallbackTimeoutID;
this._nextCallbackTimeoutID++;
this._scheduledTimeouts.set(id, setTimeout(
() => {
this._resume();
while (this._scheduledTimeouts.has(id)) {
// for some reason Go failed to register the timeout event, log and try again
// (temporary workaround for https://github.com/golang/go/issues/28975)
console.warn("scheduleTimeoutEvent: missed timeout event");
this._resume();
}
},
getInt64(sp + 8),
));
this.mem.setInt32(sp + 16, id, true);
},
// func clearTimeoutEvent(id int32)
"runtime.clearTimeoutEvent": (sp) => {
sp >>>= 0;
const id = this.mem.getInt32(sp + 8, true);
clearTimeout(this._scheduledTimeouts.get(id));
this._scheduledTimeouts.delete(id);
},
// func getRandomData(r []byte)
"runtime.getRandomData": (sp) => {
sp >>>= 0;
crypto.getRandomValues(loadSlice(sp + 8));
// func sleepTicks(timeout int64)
"runtime.sleepTicks": (timeout) => {
// Do not sleep, only reactivate scheduler after the given timeout.
setTimeout(() => {
if (this.exited) return;
try {
this._inst.exports.go_scheduler();
} catch (e) {
if (e !== wasmExit) throw e;
}
}, Number(timeout)/1e6);
},
// func finalizeRef(v ref)
"syscall/js.finalizeRef": (sp) => {
sp >>>= 0;
const id = this.mem.getUint32(sp + 8, true);
this._goRefCounts[id]--;
if (this._goRefCounts[id] === 0) {
const v = this._values[id];
this._values[id] = null;
this._ids.delete(v);
this._idPool.push(id);
"syscall/js.finalizeRef": (v_ref) => {
// Note: TinyGo does not support finalizers so this is only called
// for one specific case, by js.go:jsString. and can/might leak memory.
const id = v_ref & 0xffffffffn;
if (this._goRefCounts?.[id] !== undefined) {
this._goRefCounts[id]--;
if (this._goRefCounts[id] === 0) {
const v = this._values[id];
this._values[id] = null;
this._ids.delete(v);
this._idPool.push(id);
}
} else {
console.error("syscall/js.finalizeRef: unknown id", id);
}
},
// func stringVal(value string) ref
"syscall/js.stringVal": (sp) => {
sp >>>= 0;
storeValue(sp + 24, loadString(sp + 8));
"syscall/js.stringVal": (value_ptr, value_len) => {
value_ptr >>>= 0;
const s = loadString(value_ptr, value_len);
return boxValue(s);
},
// func valueGet(v ref, p string) ref
"syscall/js.valueGet": (sp) => {
sp >>>= 0;
const result = Reflect.get(loadValue(sp + 8), loadString(sp + 16));
sp = this._inst.exports.getsp() >>> 0; // see comment above
storeValue(sp + 32, result);
"syscall/js.valueGet": (v_ref, p_ptr, p_len) => {
let prop = loadString(p_ptr, p_len);
let v = unboxValue(v_ref);
let result = Reflect.get(v, prop);
return boxValue(result);
},
// func valueSet(v ref, p string, x ref)
"syscall/js.valueSet": (sp) => {
sp >>>= 0;
Reflect.set(loadValue(sp + 8), loadString(sp + 16), loadValue(sp + 32));
"syscall/js.valueSet": (v_ref, p_ptr, p_len, x_ref) => {
const v = unboxValue(v_ref);
const p = loadString(p_ptr, p_len);
const x = unboxValue(x_ref);
Reflect.set(v, p, x);
},
// func valueDelete(v ref, p string)
"syscall/js.valueDelete": (sp) => {
sp >>>= 0;
Reflect.deleteProperty(loadValue(sp + 8), loadString(sp + 16));
"syscall/js.valueDelete": (v_ref, p_ptr, p_len) => {
const v = unboxValue(v_ref);
const p = loadString(p_ptr, p_len);
Reflect.deleteProperty(v, p);
},
// func valueIndex(v ref, i int) ref
"syscall/js.valueIndex": (sp) => {
sp >>>= 0;
storeValue(sp + 24, Reflect.get(loadValue(sp + 8), getInt64(sp + 16)));
"syscall/js.valueIndex": (v_ref, i) => {
return boxValue(Reflect.get(unboxValue(v_ref), i));
},
// valueSetIndex(v ref, i int, x ref)
"syscall/js.valueSetIndex": (sp) => {
sp >>>= 0;
Reflect.set(loadValue(sp + 8), getInt64(sp + 16), loadValue(sp + 24));
"syscall/js.valueSetIndex": (v_ref, i, x_ref) => {
Reflect.set(unboxValue(v_ref), i, unboxValue(x_ref));
},
// func valueCall(v ref, m string, args []ref) (ref, bool)
"syscall/js.valueCall": (sp) => {
sp >>>= 0;
"syscall/js.valueCall": (ret_addr, v_ref, m_ptr, m_len, args_ptr, args_len, args_cap) => {
const v = unboxValue(v_ref);
const name = loadString(m_ptr, m_len);
const args = loadSliceOfValues(args_ptr, args_len, args_cap);
try {
const v = loadValue(sp + 8);
const m = Reflect.get(v, loadString(sp + 16));
const args = loadSliceOfValues(sp + 32);
const result = Reflect.apply(m, v, args);
sp = this._inst.exports.getsp() >>> 0; // see comment above
storeValue(sp + 56, result);
this.mem.setUint8(sp + 64, 1);
const m = Reflect.get(v, name);
storeValue(ret_addr, Reflect.apply(m, v, args));
mem().setUint8(ret_addr + 8, 1);
} catch (err) {
sp = this._inst.exports.getsp() >>> 0; // see comment above
storeValue(sp + 56, err);
this.mem.setUint8(sp + 64, 0);
storeValue(ret_addr, err);
mem().setUint8(ret_addr + 8, 0);
}
},
// func valueInvoke(v ref, args []ref) (ref, bool)
"syscall/js.valueInvoke": (sp) => {
sp >>>= 0;
"syscall/js.valueInvoke": (ret_addr, v_ref, args_ptr, args_len, args_cap) => {
try {
const v = loadValue(sp + 8);
const args = loadSliceOfValues(sp + 16);
const result = Reflect.apply(v, undefined, args);
sp = this._inst.exports.getsp() >>> 0; // see comment above
storeValue(sp + 40, result);
this.mem.setUint8(sp + 48, 1);
const v = unboxValue(v_ref);
const args = loadSliceOfValues(args_ptr, args_len, args_cap);
storeValue(ret_addr, Reflect.apply(v, undefined, args));
mem().setUint8(ret_addr + 8, 1);
} catch (err) {
sp = this._inst.exports.getsp() >>> 0; // see comment above
storeValue(sp + 40, err);
this.mem.setUint8(sp + 48, 0);
storeValue(ret_addr, err);
mem().setUint8(ret_addr + 8, 0);
}
},
// func valueNew(v ref, args []ref) (ref, bool)
"syscall/js.valueNew": (sp) => {
sp >>>= 0;
"syscall/js.valueNew": (ret_addr, v_ref, args_ptr, args_len, args_cap) => {
const v = unboxValue(v_ref);
const args = loadSliceOfValues(args_ptr, args_len, args_cap);
try {
const v = loadValue(sp + 8);
const args = loadSliceOfValues(sp + 16);
const result = Reflect.construct(v, args);
sp = this._inst.exports.getsp() >>> 0; // see comment above
storeValue(sp + 40, result);
this.mem.setUint8(sp + 48, 1);
storeValue(ret_addr, Reflect.construct(v, args));
mem().setUint8(ret_addr + 8, 1);
} catch (err) {
sp = this._inst.exports.getsp() >>> 0; // see comment above
storeValue(sp + 40, err);
this.mem.setUint8(sp + 48, 0);
storeValue(ret_addr, err);
mem().setUint8(ret_addr+ 8, 0);
}
},
// func valueLength(v ref) int
"syscall/js.valueLength": (sp) => {
sp >>>= 0;
setInt64(sp + 16, parseInt(loadValue(sp + 8).length));
"syscall/js.valueLength": (v_ref) => {
return unboxValue(v_ref).length;
},
// valuePrepareString(v ref) (ref, int)
"syscall/js.valuePrepareString": (sp) => {
sp >>>= 0;
const str = encoder.encode(String(loadValue(sp + 8)));
storeValue(sp + 16, str);
setInt64(sp + 24, str.length);
"syscall/js.valuePrepareString": (ret_addr, v_ref) => {
const s = String(unboxValue(v_ref));
const str = encoder.encode(s);
storeValue(ret_addr, str);
mem().setInt32(ret_addr + 8, str.length, true);
},
// valueLoadString(v ref, b []byte)
"syscall/js.valueLoadString": (sp) => {
sp >>>= 0;
const str = loadValue(sp + 8);
loadSlice(sp + 16).set(str);
"syscall/js.valueLoadString": (v_ref, slice_ptr, slice_len, slice_cap) => {
const str = unboxValue(v_ref);
loadSlice(slice_ptr, slice_len, slice_cap).set(str);
},
// func valueInstanceOf(v ref, t ref) bool
"syscall/js.valueInstanceOf": (sp) => {
sp >>>= 0;
this.mem.setUint8(sp + 24, (loadValue(sp + 8) instanceof loadValue(sp + 16)) ? 1 : 0);
"syscall/js.valueInstanceOf": (v_ref, t_ref) => {
return unboxValue(v_ref) instanceof unboxValue(t_ref);
},
// func copyBytesToGo(dst []byte, src ref) (int, bool)
"syscall/js.copyBytesToGo": (sp) => {
sp >>>= 0;
const dst = loadSlice(sp + 8);
const src = loadValue(sp + 32);
"syscall/js.copyBytesToGo": (ret_addr, dest_addr, dest_len, dest_cap, src_ref) => {
let num_bytes_copied_addr = ret_addr;
let returned_status_addr = ret_addr + 4; // Address of returned boolean status variable
const dst = loadSlice(dest_addr, dest_len);
const src = unboxValue(src_ref);
if (!(src instanceof Uint8Array || src instanceof Uint8ClampedArray)) {
this.mem.setUint8(sp + 48, 0);
mem().setUint8(returned_status_addr, 0); // Return "not ok" status
return;
}
const toCopy = src.subarray(0, dst.length);
dst.set(toCopy);
setInt64(sp + 40, toCopy.length);
this.mem.setUint8(sp + 48, 1);
mem().setUint32(num_bytes_copied_addr, toCopy.length, true);
mem().setUint8(returned_status_addr, 1); // Return "ok" status
},
// func copyBytesToJS(dst ref, src []byte) (int, bool)
"syscall/js.copyBytesToJS": (sp) => {
sp >>>= 0;
const dst = loadValue(sp + 8);
const src = loadSlice(sp + 16);
// copyBytesToJS(dst ref, src []byte) (int, bool)
// Originally copied from upstream Go project, then modified:
// https://github.com/golang/go/blob/3f995c3f3b43033013013e6c7ccc93a9b1411ca9/misc/wasm/wasm_exec.js#L404-L416
"syscall/js.copyBytesToJS": (ret_addr, dst_ref, src_addr, src_len, src_cap) => {
let num_bytes_copied_addr = ret_addr;
let returned_status_addr = ret_addr + 4; // Address of returned boolean status variable
const dst = unboxValue(dst_ref);
const src = loadSlice(src_addr, src_len);
if (!(dst instanceof Uint8Array || dst instanceof Uint8ClampedArray)) {
this.mem.setUint8(sp + 48, 0);
mem().setUint8(returned_status_addr, 0); // Return "not ok" status
return;
}
const toCopy = src.subarray(0, dst.length);
dst.set(toCopy);
setInt64(sp + 40, toCopy.length);
this.mem.setUint8(sp + 48, 1);
},
"debug": (value) => {
console.log(value);
mem().setUint32(num_bytes_copied_addr, toCopy.length, true);
mem().setUint8(returned_status_addr, 1); // Return "ok" status
},
}
};
// Go 1.20 uses 'env'. Go 1.21 uses 'gojs'.
// For compatibility, we use both as long as Go 1.20 is supported.
this.importObject.env = this.importObject.gojs;
}
async run(instance) {
if (!(instance instanceof WebAssembly.Instance)) {
throw new Error("Go.run: WebAssembly.Instance expected");
}
this._inst = instance;
this.mem = new DataView(this._inst.exports.mem.buffer);
this._values = [ // JS values that Go currently has references to, indexed by reference id
NaN,
0,
null,
true,
false,
globalThis,
global,
this,
];
this._goRefCounts = new Array(this._values.length).fill(Infinity); // number of references that Go has to a JS value, indexed by reference id
this._ids = new Map([ // mapping from JS values to reference ids
[0, 1],
[null, 2],
[true, 3],
[false, 4],
[globalThis, 5],
[this, 6],
]);
this._idPool = []; // unused ids that have been garbage collected
this.exited = false; // whether the Go program has exited
this._goRefCounts = []; // number of references that Go has to a JS value, indexed by reference id
this._ids = new Map(); // mapping from JS values to reference ids
this._idPool = []; // unused ids that have been garbage collected
this.exited = false; // whether the Go program has exited
this.exitCode = 0;
// Pass command line arguments and environment variables to WebAssembly by writing them to the linear memory.
let offset = 4096;
if (this._inst.exports._start) {
let exitPromise = new Promise((resolve, reject) => {
this._resolveExitPromise = resolve;
});
const strPtr = (str) => {
const ptr = offset;
const bytes = encoder.encode(str + "\0");
new Uint8Array(this.mem.buffer, offset, bytes.length).set(bytes);
offset += bytes.length;
if (offset % 8 !== 0) {
offset += 8 - (offset % 8);
// Run program, but catch the wasmExit exception that's thrown
// to return back here.
try {
this._inst.exports._start();
} catch (e) {
if (e !== wasmExit) throw e;
}
return ptr;
};
const argc = this.argv.length;
const argvPtrs = [];
this.argv.forEach((arg) => {
argvPtrs.push(strPtr(arg));
});
argvPtrs.push(0);
const keys = Object.keys(this.env).sort();
keys.forEach((key) => {
argvPtrs.push(strPtr(`${key}=${this.env[key]}`));
});
argvPtrs.push(0);
const argv = offset;
argvPtrs.forEach((ptr) => {
this.mem.setUint32(offset, ptr, true);
this.mem.setUint32(offset + 4, 0, true);
offset += 8;
});
// The linker guarantees global data starts from at least wasmMinDataAddr.
// Keep in sync with cmd/link/internal/ld/data.go:wasmMinDataAddr.
const wasmMinDataAddr = 4096 + 8192;
if (offset >= wasmMinDataAddr) {
throw new Error("total length of command line and environment variables exceeds limit");
await exitPromise;
return this.exitCode;
} else {
this._inst.exports._initialize();
}
this._inst.exports.run(argc, argv);
if (this.exited) {
this._resolveExitPromise();
}
await this._exitPromise;
}
_resume() {
if (this.exited) {
throw new Error("Go program has already exited");
}
this._inst.exports.resume();
try {
this._inst.exports.resume();
} catch (e) {
if (e !== wasmExit) throw e;
}
if (this.exited) {
this._resolveExitPromise();
}
@@ -558,4 +528,26 @@
};
}
}
if (
global.require &&
global.require.main === module &&
global.process &&
global.process.versions &&
!global.process.versions.electron
) {
if (process.argv.length != 3) {
console.error("usage: go_js_wasm_exec [wasm binary] [arguments]");
process.exit(1);
}
const go = new Go();
WebAssembly.instantiate(fs.readFileSync(process.argv[2]), go.importObject).then(async (result) => {
let exitCode = await go.run(result.instance);
process.exit(exitCode);
}).catch((err) => {
console.error(err);
process.exit(1);
});
}
})();