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target-project-locator.ts
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target-project-locator.ts
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import { getRootTsConfigFileName, resolveModuleByImport } from './typescript';
import { isRelativePath, readJsonFile } from './fileutils';
import { dirname, join, posix } from 'path';
import { workspaceRoot } from './workspace-root';
import {
ProjectGraph,
ProjectGraphExternalNode,
ProjectGraphProjectNode,
} from '../config/project-graph';
export class TargetProjectLocator {
private projectRootMappings = createProjectRootMappings(this.nodes);
private npmProjects = filterRootExternalDependencies(this.externalNodes);
private tsConfig = this.getRootTsConfig();
private paths = this.tsConfig.config?.compilerOptions?.paths;
private typescriptResolutionCache = new Map<string, string | null>();
private npmResolutionCache = new Map<string, string | null>();
constructor(
private readonly nodes: Record<string, ProjectGraphProjectNode>,
private readonly externalNodes: Record<string, ProjectGraphExternalNode>
) {}
/**
* Find a project based on its import
*
* @param importExpr
* @param filePath
*/
findProjectWithImport(importExpr: string, filePath: string): string {
const normalizedImportExpr = importExpr.split('#')[0];
if (isRelativePath(normalizedImportExpr)) {
const resolvedModule = posix.join(
dirname(filePath),
normalizedImportExpr
);
return this.findProjectOfResolvedModule(resolvedModule);
}
const paths = this.findPaths(normalizedImportExpr);
if (paths) {
for (let p of paths) {
const maybeResolvedProject = this.findProjectOfResolvedModule(p);
if (maybeResolvedProject) {
return maybeResolvedProject;
}
}
}
// try to find npm package before using expensive typescript resolution
const npmProject = this.findNpmPackage(normalizedImportExpr);
if (npmProject) {
return npmProject;
}
if (this.tsConfig.config) {
// TODO(meeroslav): this block is probably obsolete
// and existed only because of the incomplete `paths` matching
// if import cannot be matched using tsconfig `paths` the compilation would fail anyway
const resolvedProject = this.resolveImportWithTypescript(
normalizedImportExpr,
filePath
);
if (resolvedProject) {
return resolvedProject;
}
}
// nothing found, cache for later
this.npmResolutionCache.set(normalizedImportExpr, undefined);
return null;
}
/**
* Return file paths matching the import relative to the repo root
* @param normalizedImportExpr
* @returns
*/
findPaths(normalizedImportExpr: string): string[] | undefined {
if (!this.paths) {
return undefined;
}
if (this.paths[normalizedImportExpr]) {
return this.paths[normalizedImportExpr];
}
const wildcardPath = Object.keys(this.paths).find(
(path) =>
path.endsWith('/*') &&
(normalizedImportExpr.startsWith(path.replace(/\*$/, '')) ||
normalizedImportExpr === path.replace(/\/\*$/, ''))
);
if (wildcardPath) {
return this.paths[wildcardPath];
}
return undefined;
}
private resolveImportWithTypescript(
normalizedImportExpr: string,
filePath: string
): string | undefined {
let resolvedModule: string;
if (this.typescriptResolutionCache.has(normalizedImportExpr)) {
resolvedModule = this.typescriptResolutionCache.get(normalizedImportExpr);
} else {
resolvedModule = resolveModuleByImport(
normalizedImportExpr,
filePath,
this.tsConfig.absolutePath
);
this.typescriptResolutionCache.set(
normalizedImportExpr,
resolvedModule ? resolvedModule : null
);
}
// TODO: vsavkin temporary workaround. Remove it once we reworking handling of npm packages.
if (resolvedModule && resolvedModule.indexOf('node_modules/') === -1) {
const resolvedProject = this.findProjectOfResolvedModule(resolvedModule);
if (resolvedProject) {
return resolvedProject;
}
}
return;
}
private findNpmPackage(npmImport: string): string | undefined {
if (this.npmResolutionCache.has(npmImport)) {
return this.npmResolutionCache.get(npmImport);
} else {
const pkg = this.npmProjects.find(
(pkg) =>
npmImport === pkg.data.packageName ||
npmImport.startsWith(`${pkg.data.packageName}/`)
);
if (pkg) {
this.npmResolutionCache.set(npmImport, pkg.name);
return pkg.name;
}
}
}
private findProjectOfResolvedModule(
resolvedModule: string
): string | undefined {
const normalizedResolvedModule = resolvedModule.startsWith('./')
? resolvedModule.substring(2)
: resolvedModule;
const importedProject = this.findMatchingProjectFiles(
normalizedResolvedModule
);
return importedProject ? importedProject.name : void 0;
}
private getAbsolutePath(path: string) {
return join(workspaceRoot, path);
}
private getRootTsConfig() {
const path = getRootTsConfigFileName();
if (!path) {
return {
path: null,
absolutePath: null,
config: null,
};
}
const absolutePath = this.getAbsolutePath(path);
return {
absolutePath,
path,
config: readJsonFile(absolutePath),
};
}
private findMatchingProjectFiles(file: string) {
const project = findMatchingProjectForPath(file, this.projectRootMappings);
return this.nodes[project];
}
}
// matches `npm:@scope/name`, `npm:name` but not `npm:@scope/name@version` and `npm:name@version`
const ROOT_VERSION_PACKAGE_NAME_REGEX = /^npm:(?!.+@.+)/;
function filterRootExternalDependencies(
externalNodes: Record<string, ProjectGraphExternalNode>
): ProjectGraphExternalNode[] {
if (!externalNodes) {
return [];
}
const keys = Object.keys(externalNodes);
const nodes = [];
for (let i = 0; i < keys.length; i++) {
if (keys[i].match(ROOT_VERSION_PACKAGE_NAME_REGEX)) {
nodes.push(externalNodes[keys[i]]);
}
}
return nodes;
}
/**
* Mapps the project root paths to the project name
* @param nodes
* @returns
*/
export function createProjectRootMappings(
nodes: Record<string, ProjectGraphProjectNode>
) {
const projectRootMappings = new Map<string, string>();
for (const projectName of Object.keys(nodes)) {
const root = nodes[projectName].data.root;
projectRootMappings.set(
root && root.endsWith('/') ? root.substring(0, root.length - 1) : root,
projectName
);
}
return projectRootMappings;
}
export type MappedProjectGraph<T = any> = ProjectGraph<T> & {
allFiles: Record<string, string>;
};
/**
* Strips the file extension from the file path
* @param file
* @returns
*/
export function removeExt(file: string): string {
return file.replace(/(?<!(^|\/))\.[^/.]+$/, '');
}
/**
* Maps the project graph to a format that makes it easier to find the project
* based on the file path.
* @param projectGraph
* @returns
*/
export function mapProjectGraphFiles<T>(
projectGraph: ProjectGraph<T>
): MappedProjectGraph | null {
if (!projectGraph) {
return null;
}
const allFiles: Record<string, string> = {};
Object.entries(
projectGraph.nodes as Record<string, ProjectGraphProjectNode>
).forEach(([name, node]) => {
node.data.files.forEach(({ file }) => {
const fileName = removeExt(file);
allFiles[fileName] = name;
});
});
return {
...projectGraph,
allFiles,
};
}
/**
* Locates a project in projectRootMap based on a file within it
* @param filePath path that is inside of projectName
* @param projectRootMap Map<projectRoot, projectName>
*/
export function findMatchingProjectForPath(
filePath: string,
projectRootMap: Map<string, string>
): string | null {
for (
let currentPath = filePath;
currentPath != dirname(currentPath);
currentPath = dirname(currentPath)
) {
const p = projectRootMap.get(currentPath);
if (p) {
return p;
}
}
return null;
}