Add support for declaring specific endpoints to be built

__tests__/cli.test.js

@@ -175,6 +175,48 @@ describe('CLI Build Command', () => {
     expect(process.stdout.write).toHaveBeenCalledWith(` * my-theme `);
   });
 
+  it('runs specific projects and entrypoints mode when requested', () => {
+    mockFs({
+      ...requiredRealDirs,
+      plugins: {
+        'my-plugin': {
+          'package.json': JSON.stringify({
+            name: 'my-plugin',
+          }),
+          src: {
+            entrypoints: {
+              'some-file.js': 'console.log("file content here");',
+              'frontend.js': 'console.log("file content here");',
+            },
+          },
+        },
+      },
+      themes: {
+        'my-theme': {
+          'package.json': JSON.stringify({
+            name: 'my-theme',
+          }),
+          src: {
+            entrypoints: {
+              'some-file.js': 'console.log("file content here");',
+            },
+          },
+        },
+      },
+      'client-mu-plugins': {},
+    });
+
+    runCommand('build', '--once', 'my-plugin@frontend,my-theme');
+
+    expect(mockWebpack).toHaveBeenCalled();
+    expect(process.stdout.write).toHaveBeenCalledWith(
+      `\x1b[1mCompiling \x1b[4mlist\x1b[0m\x1b[1m of projects in development mode.\x1b[0m\n`,
+    );
+    expect(process.stdout.write).toHaveBeenCalledWith('Processing the following projects:\n');
+    expect(process.stdout.write).toHaveBeenCalledWith(` * my-plugin `);
+    expect(process.stdout.write).toHaveBeenCalledWith(` * my-theme `);
+  });
+
   it('runs specific projects mode if some requested projects are not found', () => {
     mockFs({
       ...requiredRealDirs,

docs/CLI-Command-Usage.md

@@ -33,6 +33,20 @@ build-tools build my-plugin,my-theme
 
 Notice that each defined project is not a full path, nor an entry point. We use the directory name as the project and the build tools then look for those as defined in the [Structuring Your Project guide](https://github.com/bigbite/build-tools/wiki/Project-Structuring), seeking through `client-mu-plugins`,`plugins` and `themes`.
 
+## Individual entrypoints
+You can define specific entrypoints to build by specifying them after `@` symbol and seperating entrypoints by `+` symbol.
+
+Build all frontend entrypoints
+```bash
+build-tools build @frontend+editor
+```
+
+Build single project entrypoitns
+```bash
+build-tools build my-plugin@frontend
+```
+
+
 ## Site-wide
 If you need to build an entire sites worth of projects, which will often be the case come deployment, you can build all applicable projects by running the command from within your `wp-content` directory.
 

src/commands/build.js

@@ -9,6 +9,7 @@ const spinner = ora();
 
 const { findAllProjectPaths, validateProject } = require('./../utils/projectpaths');
 const { getPackage } = require('./../utils/get-package');
+const { getFilteredEntryPoints } = require('./../utils/get-filtered-entrypoints');
 const dirsExist = require('../utils/dirs-exist');
 const getProjectConfig = require('../utils/get-project-config');
 
@@ -59,7 +60,7 @@ exports.handler = async ({
 
   const mode = production ? 'production' : 'development';
   // Use env variables if working on Webpack >=5.
-  const projectsList = projects.split(',').filter((item) => item.length > 0);
+  const projectsList = projects.split(',').filter((item) => item.length > 0).map((item) => item.split('@')[0]);
   const hasTargetDirs = dirsExist(targetDirs);
   const isAllProjects = (site || hasTargetDirs) && !projects;
 
@@ -115,7 +116,18 @@ exports.handler = async ({
   spinner.start('Building webpack configs.\n');
 
   const configMap = validProjects.map((packageObject) => {
-    const projectConfig = getProjectConfig(packageObject, mode);
+    // Empty array means all entrypoints.
+    let filteredEntrypoints = [];
+
+    if (projects.startsWith('@')) {
+      // Handle entrypoints when for standalone builds and all project builds.
+      filteredEntrypoints = projects.split('@')[1].split('+');
+    } else {
+      // Handle entrypoints for each specified project build.
+      filteredEntrypoints = getFilteredEntryPoints(projects)[packageObject.name];
+    }
+
+    const projectConfig = getProjectConfig(packageObject, mode, filteredEntrypoints);
 
     return webpackConfig(projectConfig, mode);
   });

src/commands/build/webpack.js

@@ -25,7 +25,7 @@ module.exports = (__PROJECT_CONFIG__, mode) => {
 
   let webpackConfig = {
     mode,
-    entry: entrypoints(__PROJECT_CONFIG__.paths.src),
+    entry: entrypoints(__PROJECT_CONFIG__.paths.src, __PROJECT_CONFIG__.filteredEntrypoints),
 
     resolve: {
       modules: [__PROJECT_CONFIG__.paths.node_modules, 'node_modules'],

src/utils/__tests__/entrypoints.test.js

@@ -21,7 +21,7 @@ describe('Entrypoints', () => {
       },
     });
     const src = './';
-    const result = entrypoints(src);
+    const result = entrypoints(src, []);
     const cwd = process.cwd();
     expect(result).toEqual({
       'empty-dir': `${cwd}/entrypoints/empty-dir`,

src/utils/__tests__/get-filtered-entrypoints.js

@@ -0,0 +1,21 @@
+const { getFilteredEntryPoints } = require('../get-filtered-entrypoints');
+
+describe('Get filtered entrypoints', () => {
+  it('Return object with empty array if no filtered entry points', () => {
+    const projects = 'test-project';
+    const result = getFilteredEntryPoints(projects);
+    expect(result).toEqual({ 'test-project': [] });
+  });
+
+  it('Returns object with array of entrypoints', () => {
+    const projects = 'test-project@frontend+editor';
+    const result = getFilteredEntryPoints(projects);
+    expect(result).toEqual({ 'test-project': ['frontend', 'editor'] });
+  });
+
+  it('Return object with entrypoints where @ is present and empty array if non defined', () => {
+    const projects = 'test-project@editor,test-project-2';
+    const result = getFilteredEntryPoints(projects);
+    expect(result).toEqual({ 'test-project': ['editor'], 'test-project-2': []});
+  });
+});

src/utils/entrypoints.js

@@ -5,9 +5,10 @@ const path = require('path');
  * Create entry points object from src folder.
  *
  * @param {string} src Project src path
+ * @param {array} filteredEntrypoints entry point to build (ie frontend, editor, etc).
  * @returns {object} webpack entrypoints
  */
-module.exports = (src) => {
+module.exports = (src, filteredEntrypoints) => {
   const entrypoints = `${src}/entrypoints`;
   const pathToEntryPoints = path.resolve(process.cwd(), entrypoints);
 
@@ -16,10 +17,19 @@ module.exports = (src) => {
   }
 
   return fs.readdirSync(pathToEntryPoints).reduce(
-    (accumulator, file) => ({
-      ...accumulator,
-      [file.split('.')[0]]: path.resolve(pathToEntryPoints, file),
-    }),
-    {},
-  );
+    (accumulator, file) => {
+      const type = file.split('.')[0];
+
+      // If types are provided, only watch/build those.
+      if (filteredEntrypoints.length > 0) {
+        if (!filteredEntrypoints.includes(type)) {
+          return accumulator;
+        }
+      }
+
+      return {
+        ...accumulator,
+        [type]: path.resolve(pathToEntryPoints, file),
+      };
+  }, {});
 };

src/utils/get-filtered-entrypoints.js

@@ -0,0 +1,37 @@
+/**
+ * Get filtered entrypoints for projects.
+ * 
+ * Example command: build project1@entry1+entry2,project2@entry3
+ * Example input: 'project1@entry1+entry2,project2@entry3'
+ * Example return: { project1: ['entry1', 'entry2'], project2: ['entry3'] }
+ * 
+ * @param {Array} projects Projects of which to filter entrypoints for.
+ * @returns {object} An object with project keys of which value for each is the entrypoints to build.
+ */
+const getFilteredEntryPoints = (projects) => {
+    const filteredProjectEntryPoints = {};
+    const projectNames = projects.split(',');
+
+    projectNames.forEach((project) => {
+        const projectParts = project.split('@');
+        const projectName = projectParts[0];
+        const entryPoints = projectParts[1] ? projectParts[1].split('+') : [];
+
+        if (!projectName) {
+            return filteredProjectEntryPoints;
+        }
+
+        if (entryPoints.length === 0) {
+            filteredProjectEntryPoints[projectName] = [];
+            return;
+        }
+
+        return filteredProjectEntryPoints[projectName] = entryPoints;
+    });
+
+    return filteredProjectEntryPoints;
+};
+
+module.exports = {
+    getFilteredEntryPoints,
+};

src/utils/get-project-config.js

@@ -13,7 +13,8 @@ module.exports = (
         },
         path: './'
     },
-    mode = 'development'
+    mode = 'development',
+    filteredEntrypoints = []
 ) => {
     return {
         name: packageObject?.name ?? '',
@@ -33,5 +34,6 @@ module.exports = (
         clean: true,
         copy: true,
         mode,
+        filteredEntrypoints,
     };
 }