packages/babel-helper-module-transforms/src/get-module-name.js
// @flow
export default function getModuleName(
rootOpts: Object,
pluginOpts: Object,
): ?string {
const {
filename,
filenameRelative = filename,
sourceRoot = pluginOpts.moduleRoot ?? rootOpts.moduleRoot,
} = rootOpts;
const {
moduleId = rootOpts.moduleId,
moduleIds = rootOpts.moduleIds ?? !!moduleId,
getModuleId = rootOpts.getModuleId,
moduleRoot = rootOpts.moduleRoot ?? sourceRoot,
} = pluginOpts;
if (!moduleIds) return null;
// moduleId is n/a if a `getModuleId()` is provided
if (moduleId != null && !getModuleId) {
return moduleId;
}
let moduleName = moduleRoot != null ? moduleRoot + "/" : "";
if (filenameRelative) {
const sourceRootReplacer =
sourceRoot != null ? new RegExp("^" + sourceRoot + "/?") : "";
moduleName += filenameRelative
// remove sourceRoot from filename
.replace(sourceRootReplacer, "")
// remove extension
.replace(/\.(\w*?)$/, "");
}
// normalize path separators
moduleName = moduleName.replace(/\\/g, "/");
if (getModuleId) {
// If return is falsy, assume they want us to use our generated default name
return getModuleId(moduleName) || moduleName;
} else {
return moduleName;
}
}