Mjs 18 add skip existing files to code generator (#17)

Mjs 18 add skip existing files to code generator

Author: fmvilas

cli.js

@@ -34,6 +34,8 @@ program
   .option('-t, --templates <templateDir>', 'directory where templates are located (defaults to internal nodejs templates)')
   .option('-b, --basedir <baseDir>', 'directory to use as the base when resolving local file references (defaults to OpenAPI file directory)')
   .option('-c, --curl', 'generate a curl scripts', false)
+  .option('-s, --skipExistingFiles', 'skip existing files')
+  .option('-d, --deleteFolders <folderName>', 'directory names to be deleted, e.g. "auto"')
   .parse(process.argv);
 
 if (!openapiFile) {
@@ -48,6 +50,8 @@ generator.generate({
   templates: program.templates ? path.resolve(process.cwd(), program.templates) : undefined,
   curl: program.curl,
   template,
+  skipExistingFiles: program.skipExistingFiles,
+  deleteFolders: program.deleteFolders
 }).then(() => {
   console.log(green('Done! ✨'));
   console.log(yellow('Check out your shiny new API at ') + magenta(program.output) + yellow('.'));

lib/generator.js

@@ -13,12 +13,32 @@ const xfs = require('fs.extra');
 const randomName = require('project-name-generator');
 const registerPartial = require('./register-partial');
 const bundler = require('./bundler');
+const yellow = text => `\x1b[33m${text}\x1b[0m`;
+const findRemoveSync = require('find-remove');
 
 const codegen = module.exports;
 
 const HELPERS_DIRNAME = '.helpers';
 const PARTIALS_DIRNAME = '.partials';
 
+/**
+ * Deletes all matching subfolders in target directory 
+ *
+ * @param   {Object}  config Configuration options
+ * @returns {Promise}
+ */
+const deleteFolders = config => new Promise((resolve, reject) => {
+  try {
+    if (config.deleteFolders) {
+      console.warn(yellow(`Deleting all subfolders named '${config.deleteFolders}' in ouput directory '${config.target_dir}'`));
+      findRemoveSync(config.target_dir, {dir: config.deleteFolders});
+    }
+    resolve();
+  } catch (e) {
+    reject(e);
+  }
+});
+
 /**
  * Generates a file.
  *
@@ -46,10 +66,19 @@ const generateFile = options => new Promise((resolve, reject) => {
       const parsed_content = template(data);
       const template_path = path.relative(templates_dir, path.resolve(root, file_name));
       const generated_path = path.resolve(target_dir, template_path).replace(/.hbs$/, '');
-      fs.writeFile(generated_path, parsed_content, 'utf8', (err) => {
-        if (err) return reject(err);
+      // WIP check here for existing?
+      const skipFile = data.skipExistingFiles && fs.existsSync(generated_path);
+      if (!skipFile) {
+        fs.writeFile(generated_path, parsed_content, 'utf8', (err) => {
+          if (err) return reject(err);
+          resolve();
+        });
+      }
+      else {
+        console.warn(yellow(`Skipping file: ${generated_path}`));
         resolve();
-      });
+      }
+      
     } catch (e) {
       reject(e);
     }
@@ -306,6 +335,7 @@ codegen.generate = config => new Promise((resolve, reject) => {
       config.templates = `${config.templates}/${config.template}`;
 
       async function start () {
+        await deleteFolders(config);
         await registerHelpers(config);
         await registerPartials(config);
         await generateDirectoryStructure(config);

package.json

@@ -47,6 +47,7 @@
   "homepage": "https://github.com/fmvilas/openapi3-generator",
   "dependencies": {
     "commander": "^2.12.2",
+    "find-remove": "^1.2.2",
     "fs.extra": "1.3.2",
     "handlebars": "^4.1.2",
     "js-yaml": "^3.13.1",