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- Stencil dependency free - Faster compiler startup times - Reduce overall download and install time - Simplify requiring typescript for the various platforms, such as deno, browser and node - Ensure the stencil compiler is always using the typescript version it's built with
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,105 @@ | ||
| import fs from 'fs-extra'; | ||
| import { Plugin } from 'rollup'; | ||
| import { join } from 'path'; | ||
| import { BuildOptions } from '../../utils/options'; | ||
| import terser from 'terser'; | ||
|
|
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| export function typescriptSourcePlugin(opts: BuildOptions): Plugin { | ||
| const tsPath = require.resolve('typescript'); | ||
| return { | ||
| name: 'typescriptSourcePlugin', | ||
| resolveId(id) { | ||
| if (id === 'typescript') { | ||
| return tsPath; | ||
| } | ||
| return null; | ||
| }, | ||
| load(id) { | ||
| if (id === tsPath) { | ||
| return bundleTypeScriptSource(tsPath, opts); | ||
| } | ||
| return null; | ||
| }, | ||
| }; | ||
| } | ||
|
|
||
| async function bundleTypeScriptSource(tsPath: string, opts: BuildOptions) { | ||
| const fileName = `typescript-${opts.typescriptVersion.replace(/\./g, '_')}-bundle-cache${opts.isProd ? '.min' : ''}.js`; | ||
| const cacheFile = join(opts.buildDir, fileName); | ||
|
|
||
| try { | ||
| // check if we've already cached this bundle | ||
| return await fs.readFile(cacheFile, 'utf8'); | ||
| } catch (e) {} | ||
|
|
||
| // get the source typescript.js file to modify | ||
| let code = await fs.readFile(tsPath, 'utf8'); | ||
|
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| // remove the default ts.getDefaultLibFilePath because it uses some | ||
| // node apis and we'll be replacing it withour own anyways and | ||
| code = removeFromSource(code, `ts.getDefaultLibFilePath = getDefaultLibFilePath;`); | ||
|
|
||
| // remove the CPUProfiler since it uses node apis | ||
| code = removeFromSource(code, `enableCPUProfiler: enableCPUProfiler,`); | ||
| code = removeFromSource(code, `disableCPUProfiler: disableCPUProfiler,`); | ||
|
|
||
| // trim off the last part that sets module.exports and polyfills globalThis since | ||
| // we don't want typescript to add itself to module.exports when in a node env | ||
| const tsEnding = `})(ts || (ts = {}));`; | ||
| if (!code.includes(tsEnding)) { | ||
| throw new Error(`"${tsEnding}" not found`); | ||
| } | ||
| const lastEnding = code.lastIndexOf(tsEnding); | ||
| code = code.substr(0, lastEnding + tsEnding.length); | ||
|
|
||
| // there's a billion unnecessary "var ts;" for namespaces | ||
| // but we'll be using the top level "const ts" instead | ||
| code = code.replace(/var ts;/g, ''); | ||
|
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| // minification is crazy better if it doesn't use typescript's | ||
| // namespace closures, like (function(ts) {...})(ts = ts || {}); | ||
| code = code.replace(/ \|\| \(ts \= \{\}\)/g, ''); | ||
|
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||
| // make a nice clean default export | ||
| // "process.browser" is used by typescript to know if it should use the node sys or not | ||
| // this ensures its using our checks. Deno should also use process.browser = true | ||
| // because we don't want deno using the node apis | ||
| const o: string[] = []; | ||
| o.push(`import { IS_NODE_ENV } from '@utils';`); | ||
| o.push(`process.browser = !IS_NODE_ENV;`); | ||
| o.push(`const ts = {};`); | ||
| o.push(code); | ||
| o.push(`export default ts;`); | ||
| code = o.join('\n'); | ||
|
|
||
| if (opts.isProd) { | ||
| const minified = terser.minify(code, { | ||
| ecma: 2018, | ||
| module: true, | ||
| compress: { | ||
| ecma: 2018, | ||
| passes: 2, | ||
| }, | ||
| output: { | ||
| ecma: 2018, | ||
| comments: false, | ||
| }, | ||
| }); | ||
|
|
||
| if (minified.error) { | ||
| throw minified.error; | ||
| } | ||
| code = minified.code; | ||
| } | ||
|
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| await fs.writeFile(cacheFile, code); | ||
|
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| return code; | ||
| } | ||
|
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| function removeFromSource(srcCode: string, removeCode: string) { | ||
| if (!srcCode.includes(removeCode)) { | ||
| throw new Error(`"${removeCode}" not found`); | ||
| } | ||
| return srcCode.replace(removeCode, `/* commented out: ${removeCode} */`); | ||
| } |
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