feat(cli): store original cli version in .yo.rc.json

See #3337

Author: raymondfeng

packages/cli/generators/project/templates/.yo-rc.json

@@ -362,9 +362,17 @@ module.exports = class BaseGenerator extends Generator {
       // No incompatible dependencies
       return;
     }
+
+    const originalCliVersion = this.config.get('version') || '<unknown>';
+    this.log(
+      chalk.red(
+        `The project was originally generated by @loopback/cli@${originalCliVersion}.`,
+      ),
+    );
+
     this.log(
       chalk.red(
-        'The project has dependencies with incompatible versions required by the CLI:',
+        `The following dependencies are incompatible with @loopback/cli@${cliPkg.version}:`,
       ),
     );
     for (const d in incompatibleDeps) {

packages/cli/lib/base-generator.js

@@ -7,6 +7,7 @@
 const BaseGenerator = require('./base-generator');
 const utils = require('./utils');
 const chalk = require('chalk');
+const cliVersion = require('../package.json').version;
 
 module.exports = class ProjectGenerator extends BaseGenerator {
   // Note: arguments and options should be defined in the constructor.
@@ -211,6 +212,10 @@ module.exports = class ProjectGenerator extends BaseGenerator {
     if (this.shouldExit()) return false;
 
     this.destinationRoot(this.projectInfo.outdir);
+
+    // Store original cli version in .yo.rc.json
+    this.config.set('version', cliVersion);
+
     // First copy common files from ../../project/templates
     this.copyTemplatedFiles(
       this.templatePath('../../project/templates/**/*'),

packages/cli/lib/project-generator.js

@@ -11,6 +11,7 @@ const path = require('path');
 const assert = require('yeoman-assert');
 const helpers = require('yeoman-test');
 const generator = path.join(__dirname, '../../../generators/app');
+const cliVersion = require('../../../package.json').version;
 const props = {
   name: 'my-app',
   description: 'My app for LoopBack 4',
@@ -88,6 +89,11 @@ describe('app-generator specific files', () => {
       'src/__tests__/acceptance/test-helper.ts',
       '+process.env.PORT',
     );
+    assert.jsonFileContent('.yo-rc.json', {
+      '@loopback/cli': {
+        version: cliVersion,
+      },
+    });
   });
 
   it('generates database migration script', () => {