feat(recommended-bump): added recommended-bump schematics

src/recommended-bump/index.ts

@@ -1,10 +1,40 @@
-import { Rule, SchematicContext, Tree } from '@angular-devkit/schematics';
+import { Rule, SchematicContext, SchematicsException, Tree } from '@angular-devkit/schematics';
+import { NodePackageInstallTask } from '@angular-devkit/schematics/tasks';
 
-
-// You don't have to export the function as default. You can also have more than one rule factory
-// per file.
 export function recommendedBump(_options: any): Rule {
   return (tree: Tree, _context: SchematicContext) => {
+
+    const packageJsonBuffer = tree.read("package.json");
+    if (!packageJsonBuffer) {
+      throw new SchematicsException("Not an npm project. Couldn't find package.json");
+    }
+
+    const packageJson = JSON.parse(packageJsonBuffer.toString());
+
+    const scripts = "scripts";
+    const recommendedVersionBumpScript = "recommended:bump";
+    const recommendedVersionBumpScriptCmd = "conventional-recommended-bump --preset=angular";
+    if (!packageJson[scripts]) {
+      packageJson[scripts] = {};
+    }
+    packageJson[scripts][recommendedVersionBumpScript] = recommendedVersionBumpScriptCmd;
+
+    const devDeps = "devDependencies";
+    const recommendedVersionBump = "conventional-recommended-bump";
+    const version = "latest";
+    if (!packageJson[devDeps]) {
+      packageJson[devDeps] = {};
+    }
+
+    if (!packageJson[devDeps][recommendedVersionBump]) {
+      packageJson[devDeps][recommendedVersionBump] = version;
+    }
+
+    tree.overwrite('package.json', JSON.stringify(packageJson, null, 2));
+    _context.logger.log('info', `Added "${recommendedVersionBumpScript}" to "${scripts}" in package.json`);
+    _context.logger.log('info', `Added "${recommendedVersionBump}@${version}" to ${devDeps}`);
+    _context.addTask(new NodePackageInstallTask());
+
     return tree;
   };
 }