@farmfe/core
Version:
Farm is a extremely fast web build tool written in Rust. Farm can start a project in milliseconds and perform HMR within 10ms, making it much faster than similar tools like webpack and vite.
73 lines • 3.04 kB
JavaScript
/**
* Lazy compilation middleware. Using the same logic as HMR middleware
*/
import { relative } from 'node:path';
import { VIRTUAL_FARM_DYNAMIC_IMPORT_SUFFIX, bold, checkClearScreen, cyan, getDynamicResources, green } from '../../index.js';
import { existsSync } from 'node:fs';
import { logError } from '../error.js';
export function lazyCompilation(devSeverContext) {
const compiler = devSeverContext.getCompiler();
if (!compiler.config.config?.lazyCompilation) {
return;
}
return async (ctx, next) => {
if (ctx.path === '/__lazy_compile') {
const paths = ctx.query.paths.split(',');
const pathsStr = paths
.map((p) => {
if (p.startsWith('/') &&
!p.endsWith(VIRTUAL_FARM_DYNAMIC_IMPORT_SUFFIX) &&
!existsSync(p)) {
return p;
}
const resolvedPath = compiler.transformModulePath(compiler.config.config.root, p);
return relative(compiler.config.config.root, resolvedPath);
})
.join(', ');
checkClearScreen(compiler.config.config);
devSeverContext.logger.info(`Lazy compiling ${bold(cyan(pathsStr))}`);
const start = Date.now();
// sync update when node is true
let result;
try {
// sync regenerate resources
result = await compiler.update(paths, true, false, false);
}
catch (e) {
logError(e);
}
if (!result) {
return;
}
if (ctx.query.node || devSeverContext.config.writeToDisk) {
compiler.writeResourcesToDisk();
}
devSeverContext.logger.info(`${bold(green(`✓`))} Lazy compilation done(${bold(cyan(pathsStr))}) in ${bold(green(`${Date.now() - start}ms`))}.`);
if (result) {
const { dynamicResources, dynamicModuleResourcesMap } = getDynamicResources(result.dynamicResourcesMap);
const returnObj = `{
"dynamicResources": ${JSON.stringify(dynamicResources)},
"dynamicModuleResourcesMap": ${JSON.stringify(dynamicModuleResourcesMap)}
}`;
const code = !ctx.query.node
? `export default ${returnObj}`
: returnObj;
ctx.type = !ctx.query.node
? 'application/javascript'
: 'application/json';
ctx.body = code;
// enable cors
ctx.set('Access-Control-Allow-Origin', '*');
ctx.set('Access-Control-Allow-Methods', '*');
ctx.set('Access-Control-Allow-Headers', '*');
}
else {
throw new Error(`Lazy compilation result not found for paths ${paths}`);
}
}
else {
await next();
}
};
}
//# sourceMappingURL=lazy-compilation.js.map