43 lines
980 B
JavaScript
43 lines
980 B
JavaScript
// @flow
|
|
import type {
|
|
ScopeHoistingPackager,
|
|
OutputFormat,
|
|
} from './ScopeHoistingPackager';
|
|
|
|
export class CJSOutputFormat implements OutputFormat {
|
|
packager: ScopeHoistingPackager;
|
|
|
|
constructor(packager: ScopeHoistingPackager) {
|
|
this.packager = packager;
|
|
}
|
|
|
|
buildBundlePrelude(): [string, number] {
|
|
let res = '';
|
|
let lines = 0;
|
|
|
|
for (let [source, specifiers] of this.packager.externals) {
|
|
// CJS only supports the namespace symbol. This ensures that all accesses
|
|
// are live and the `this` binding is correct.
|
|
let namespace = specifiers.get('*');
|
|
if (namespace) {
|
|
res += `var ${namespace} = require(${JSON.stringify(source)});\n`;
|
|
lines++;
|
|
} else {
|
|
res += `require(${JSON.stringify(source)});\n`;
|
|
lines++;
|
|
}
|
|
}
|
|
|
|
if (res.length > 0) {
|
|
res += '\n';
|
|
lines++;
|
|
}
|
|
|
|
return [res, lines];
|
|
}
|
|
|
|
buildBundlePostlude(): [string, number] {
|
|
return ['', 0];
|
|
}
|
|
}
|