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build.ts
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build.ts
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import { dim } from 'https://deno.land/std@0.106.0/fmt/colors.ts'
import { encode } from 'https://deno.land/std@0.106.0/encoding/base64.ts'
import { exists } from 'https://deno.land/std@0.106.0/fs/exists.ts'
import { ensureDir } from 'https://deno.land/std@0.106.0/fs/ensure_dir.ts'
import { createHash } from 'https://deno.land/std@0.106.0/hash/mod.ts'
import { compress } from 'https://deno.land/x/brotli@v0.1.4/mod.ts'
async function run(cmd: string[]) {
const p = Deno.run({
cmd,
stdout: 'inherit',
stderr: 'inherit'
})
const status = await p.status()
p.close()
return status.success
}
if (import.meta.main) {
const ok = await run(['wasm-pack', 'build', '--target', 'web'])
if (ok) {
const wasmData = await Deno.readFile('./pkg/aleph_compiler_bg.wasm')
const jsCode = await Deno.readTextFile('./pkg/aleph_compiler.js')
const hash = createHash('sha1').update(wasmData).toString()
let prevWasmSize = 0
if (await exists('./dist/checksum.js')) {
prevWasmSize = (await Deno.stat('./dist/wasm.js')).size
}
await ensureDir('./dist')
await Deno.writeTextFile(
'./dist/wasm.js',
[
`import { decode } from "https://deno.land/std@0.106.0/encoding/base64.ts";`,
`import { decompress } from "https://deno.land/x/brotli@v0.1.4/mod.ts";`,
`const dataRaw = "${encode(compress(wasmData))}";`,
`export default () => decompress(decode(dataRaw));`
].join('\n')
)
await Deno.writeTextFile(
'./dist/checksum.js',
`export const checksum = ${JSON.stringify(hash)};`
)
await Deno.writeTextFile(
'./dist/compiler.js',
`import { red } from 'https://deno.land/std@0.106.0/fmt/colors.ts';` + jsCode.replace('console.error(getStringFromWasm0(arg0, arg1));', `
const msg = getStringFromWasm0(arg0, arg1);
if (msg.includes('DiagnosticBuffer(["')) {
const diagnostic = msg.split('DiagnosticBuffer(["')[1].split('"])')[0]
console.error(red("ERROR"), "swc:", diagnostic)
} else {
console.error(red("ERROR"), msg)
}
`)
)
await run(['deno', 'fmt', '-q', './dist/compiler.js'])
const wasmSize = (await Deno.stat('./dist/wasm.js')).size
const increased = ((wasmSize - prevWasmSize) / prevWasmSize) * 100
if (increased) {
console.log(`${dim('[INFO]')}: wasm.js ${increased.toFixed(2)}% (${[prevWasmSize, wasmSize].filter(Boolean).map(n => (n / (1024 * 1024)).toFixed(2) + 'MB').join(' -> ')})`)
}
}
}