-
Notifications
You must be signed in to change notification settings - Fork 1
/
mod.ts
159 lines (151 loc) · 4.08 KB
/
mod.ts
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
import { ensureDir } from "https://deno.land/std@0.145.0/fs/ensure_dir.ts";
import { dirname, join } from "https://deno.land/std@0.145.0/path/mod.ts";
import init, {
parcelCSS,
parseDeps as parseDepsWasmFn,
transform as transformWasmFn,
} from "./dist/compiler.js";
import { VERSION } from "./version.ts";
import type {
DependencyDescriptor,
TransformCSSOptions,
TransformCSSResult,
TransformOptions,
TransformResult,
} from "./types.ts";
let modulesCache: string | null = null;
let wasmReady: Promise<void> | boolean = false;
if (typeof Deno.run === "function") {
const p = Deno.run({
cmd: [Deno.execPath(), "info", "--json"],
stdout: "piped",
stderr: "null",
});
const output = (new TextDecoder()).decode(await p.output());
const info = JSON.parse(output);
modulesCache = info?.modulesCache || null;
await p.status();
p.close();
}
/* check whether or not the given path exists as regular file. */
async function existsFile(path: string): Promise<boolean> {
try {
const stat = await Deno.lstat(path);
return stat.isFile;
} catch (err) {
if (err instanceof Deno.errors.NotFound) {
return false;
}
throw err;
}
}
/** initialize the compiler wasm module. */
export async function initWasm() {
const start = performance.now();
if (import.meta.url.startsWith("file://")) {
const wasmData = await Deno.readFile(
new URL("./dist/compiler.wasm", import.meta.url),
);
await init(wasmData);
} else if (modulesCache) {
const cacheDir = join(
modulesCache,
`https/deno.land/x/aleph_compiler@${VERSION}/dist`,
);
const cachePath = `${cacheDir}/compiler.wasm`;
if (await existsFile(cachePath)) {
const wasmData = await Deno.readFile(cachePath);
await init(wasmData);
} else {
const res = await fetch(
new URL("./dist/compiler.wasm", import.meta.url),
);
const wasmData = await res.arrayBuffer();
await init(wasmData);
await ensureDir(dirname(cachePath));
await Deno.writeFile(cachePath, new Uint8Array(wasmData));
}
} else {
await init(fetch(
new URL("./dist/compiler.wasm", import.meta.url),
));
}
wasmReady = true;
console.debug(
`Initialized aleph-compiler wasm in ${
(performance.now() - start).toFixed(2)
}ms.`,
);
}
async function checkWasmReady() {
if (wasmReady === true) return;
if (wasmReady === false) wasmReady = initWasm();
await wasmReady;
}
/** Parse the deps of the modules. */
export async function parseDeps(
specifier: string,
code: string,
options: Pick<TransformOptions, "importMap" | "lang"> = {},
): Promise<DependencyDescriptor[]> {
await checkWasmReady();
return parseDepsWasmFn(specifier, code, options);
}
/**
* Transforms the JSX/TS module into a JS module.
*
* ```tsx
* transform(
* '/app.tsx',
* `
* import React from 'https://esm.sh/react';
*
* export default function App() {
* return <h1>Hello world!</h1>
* }
* `
* )
* ```
*/
export async function transform(
specifier: string,
code: string,
options: TransformOptions = {},
): Promise<TransformResult> {
await checkWasmReady();
try {
return transformWasmFn(specifier, code, options);
} catch (error) {
if (
options.minify &&
(error.stack ?? error.messsage ?? "").includes("ThreadPoolBuildError")
) {
// disable minify if ThreadPoolBuildError
if (options.minify.compress) {
return await transform(specifier, code, {
...options,
minify: { compress: false },
});
} else {
return transformWasmFn(specifier, code, {
...options,
minify: undefined,
});
}
} else {
throw error;
}
}
}
/**
* Compiles a CSS file, including optionally minifying and lowering syntax to the given
* targets. A source map may also be generated, but this is not enabled by default.
*/
export async function transformCSS(
specifier: string,
code: string,
options: TransformCSSOptions = {},
): Promise<TransformCSSResult> {
await checkWasmReady();
return parcelCSS(specifier, code, options);
}