feat(cli): remove default cjs format

packages/cli/src/build-stylable.ts

@@ -5,10 +5,11 @@ import { projectsConfig } from './config/projects-config';
 import {
     createBuildIdentifier,
     createDefaultOptions,
+    hasStylableCSSOutput,
     NAMESPACE_RESOLVER_MODULE_REQUEST,
 } from './config/resolve-options';
 import { DiagnosticsManager } from './diagnostics-manager';
-import { createDefaultLogger } from './logger';
+import { createDefaultLogger, levels } from './logger';
 import type { BuildContext, BuildOptions } from './types';
 import { WatchHandler } from './watch-handler';
 
@@ -81,6 +82,13 @@ export async function buildStylable(
 
             log('[Project]', projectRoot, buildOptions);
 
+            if (!hasStylableCSSOutput(buildOptions)) {
+                log(
+                    `No target output declared for "${identifier}", please provide one or more of the following target options: "cjs", "esm", "css", "stcss" or "indexFile"`,
+                    levels.info
+                );
+            }
+
             const stylable = new Stylable({
                 fileSystem,
                 requireModule,

packages/cli/src/config/resolve-options.ts

@@ -201,7 +201,7 @@ export function createDefaultOptions(): BuildOptions {
     return {
         outDir: '.',
         srcDir: '.',
-        cjs: true,
+        cjs: false,
         esm: false,
         dts: false,
         injectCSSRequest: false,
@@ -262,3 +262,13 @@ export function createBuildIdentifier(
         ? projectRoot.replace(rootDir, '')
         : projectRoot;
 }
+
+export function hasStylableCSSOutput(options: BuildOptions): boolean {
+    return (
+        options.cjs ||
+        options.esm ||
+        options.outputCSS ||
+        options.outputSources ||
+        Boolean(options.indexFile)
+    );
+}

packages/cli/test/cli.spec.ts

@@ -29,7 +29,7 @@ describe('Stylable Cli', function () {
             'style.st.css': `.root{color:red}`,
         });
 
-        runCliSync(['--rootDir', tempDir.path, '--nsr', testNsrPath]);
+        runCliSync(['--rootDir', tempDir.path, '--nsr', testNsrPath, '--cjs']);
 
         const dirContent = loadDirSync(tempDir.path);
         expect(
@@ -46,7 +46,15 @@ describe('Stylable Cli', function () {
             'style.st.css': `.root{color:red}`,
         });
 
-        runCliSync(['--rootDir', tempDir.path, '--nsr', testNsrPath, '--outDir', './dist']);
+        runCliSync([
+            '--rootDir',
+            tempDir.path,
+            '--nsr',
+            testNsrPath,
+            '--outDir',
+            './dist',
+            '--cjs',
+        ]);
 
         const dirContent = loadDirSync(tempDir.path);
         expect(Object.keys(dirContent)).to.eql([
@@ -110,7 +118,7 @@ describe('Stylable Cli', function () {
         });
 
         const nsr = require.resolve('@stylable/node');
-        runCliSync(['--rootDir', tempDir.path, '--nsr', nsr]);
+        runCliSync(['--rootDir', tempDir.path, '--nsr', nsr, '--cjs']);
 
         const dirContent = loadDirSync(tempDir.path);
 
@@ -356,6 +364,22 @@ describe('Stylable Cli', function () {
             expect(stdout, 'stdout').to.match(/unknown var "xxx"/);
         });
 
+        it('should report when there are no css output formats', () => {
+            populateDirectorySync(tempDir.path, {
+                'package.json': `{"name": "test", "version": "0.0.0"}`,
+                'style.st.css': `.root{}`,
+            });
+
+            const { stdout, status } = runCliSync(['--rootDir', tempDir.path]);
+
+            expect(status).to.equal(0);
+            expect(stdout, 'stdout').to.match(
+                new RegExp(
+                    `No target output declared for "(.*?)", please provide one or more of the following target options: "cjs", "esm", "css", "stcss" or "indexFile"`
+                )
+            );
+        });
+
         it('(diagnosticsMode) should not exit with error when using strict mode with only info diagnostics', () => {
             populateDirectorySync(tempDir.path, {
                 'package.json': `{"name": "test", "version": "0.0.0"}`,

packages/cli/test/config-options.spec.ts

@@ -83,9 +83,12 @@ describe('Stylable CLI config file options', function () {
             'package.json': `{"name": "test", "version": "0.0.0"}`,
             'style.st.css': `.root{color:red}`,
             'stylable.config.js': `
-                  exports.stcConfig = () => ({ options: { 
-                    outDir: './out',
-                   } })
+                    exports.stcConfig = () => ({ 
+                        options: { 
+                            cjs: true,
+                            outDir: './out',
+                        } 
+                    })
                 `,
         });
 
@@ -109,9 +112,12 @@ describe('Stylable CLI config file options', function () {
                 'package.json': `{"name": "test", "version": "0.0.0"}`,
                 'style.st.css': `.root{color:red}`,
                 'stylable.config.js': `
-                        exports.stcConfig = () => ({ options: { 
-                            outDir: './dist',
-                        } })
+                        exports.stcConfig = () => ({ 
+                            options: { 
+                                cjs: true,
+                                outDir: './dist',
+                            }
+                        })
                 `,
             },
         });