bump version number

.github/workflows/alpha.yml

@@ -13,6 +13,7 @@ jobs:
         with:
           node-version: "12.x"
       - run: yarn install --frozen-lockfile
+      - run: yarn test
       - run: yarn build
       - run: cd ./dist && yarn pack --filename=../package.tgz
         if: "!contains(github.event.head_commit.message, '[skip publish]')"
@@ -35,6 +36,7 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
+          prerelease: true
           tag_name: ${{ steps.update_tag.outputs.tagname }}
           release_name: Release ${{ steps.update_tag.outputs.tagname }}
       - name: Upload Release Asset
@@ -46,5 +48,5 @@ jobs:
         with:
           upload_url: ${{ steps.create_release.outputs.upload_url }}
           asset_path: ./package.tgz
-          asset_name: package.tgz
+          asset_name: simple-scaffold ${{ steps.update_tag.outputs.tagname }}.tgz
           asset_content_type: application/tgz

.github/workflows/main.yml

@@ -13,6 +13,7 @@ jobs:
         with:
           node-version: "12.x"
       - run: yarn install --frozen-lockfile
+      - run: yarn test
       - run: yarn build
       - run: cd ./dist && yarn pack --filename=../package.tgz
         if: "!contains(github.event.head_commit.message, '[skip publish]')"
@@ -45,5 +46,5 @@ jobs:
         with:
           upload_url: ${{ steps.create_release.outputs.upload_url }}
           asset_path: ./package.tgz
-          asset_name: package.tgz
+          asset_name: simple-scaffold ${{ steps.update_tag.outputs.tagname }}.tgz
           asset_content_type: application/tgz

.vscode/settings.json

@@ -2,6 +2,11 @@
   "typescript.tsdk": "./node_modules/typescript/lib",
   "npm.packageManager": "yarn",
   "cSpell.words": [
-    "massarg"
+    "massarg",
+    "nodir",
+    "nobrace",
+    "noext",
+    "nocomment",
+    "nonegate"
   ]
 }

MIGRATION.md

@@ -0,0 +1,20 @@
+# Migrating from 0.x to 1.0
+
+In Simple Scaffold v1.0, the entire codebase was overhauled, yet usage remains mostly the same
+between versions. With these notable exceptions:
+
+- Some of the argument names have changed
+- Template syntax has been improved
+
+## Argument changes
+
+- `locals` has been renamed to `data`. The appropriate command line args have been updated as
+  well to `--data` | `-d`.
+
+## Template syntax changes
+
+Simple Scaffold still uses Handlebars.js to handle template content and file names. However, helpers
+have been added to remove the need for you to pre-process the template data on simple use-cases such
+as case type manipulation (converting to camel case, snake case, etc)
+
+See the readme for the full information on how to use these helpers and which are available.

README.md

@@ -2,6 +2,16 @@
 
 Simple Scaffold allows you to create your structured files based on templates.
 
+Simply organize your commonly-created files in their original structure, and replace any variable
+values (such as component or app name) inside the paths or contents of the files with tokens to be
+populated upon scaffolding.
+
+Then, run Simple Scaffold and it will generate your files for you in the desired structure,
+with file names and contents that contain your dynamic information.
+
+It's a simple way to easily create reusable components, common class files to start writing from,
+or even entire app structures.
+
 ## Install
 
 You can either use it as a command line tool or import into your own code and run from there.
@@ -37,8 +47,7 @@ Options:
 
   --templates|-t            Template files to use as input. You may provide multiple
                             files, each of which can be a relative or absolute path, or a glob
-                            pattern for multiple file matching easily. (default:
-                            )
+                            pattern for multiple file matching easily. (default: current dir)
 
   --overwrite|-w            Enable to override output files, even if they already exist.
                             (default: false)
@@ -78,13 +87,13 @@ You can also add this as a script in your `package.json`:
 ## Use in Node.js
 
 You can also build the scaffold yourself, if you want to create more complex arguments or scaffold groups.
-Simply pass a config object to the constructor, and invoke `run()` when you are ready to start.
+Simply pass a config object to the Scaffold function when you are ready to start.
 The config takes similar arguments to the command line:
 
-```javascript
-const SimpleScaffold = require("simple-scaffold").default
+```typescript
+import Scaffold from "simple-scaffold"
 
-const scaffold = SimpleScaffold({
+const config = {
   name: "component",
   templates: [path.join(__dirname, "scaffolds", "component")],
   output: path.join(__dirname, "src", "components"),
@@ -92,19 +101,33 @@ const scaffold = SimpleScaffold({
   locals: {
     property: "value",
   },
-})
-```
-
-The exception in the config is that `output`, when used in Node directly, may also be passed a
-function for each input file to output into a dynamic path:
-
-```javascript
-config.output = (fullPath, baseDir, baseName) => {
-  console.log({ fullPath, baseDir, baseName })
-  return path.resolve(baseDir, baseName)
+  helpers: {
+    twice: (text) => [text, text].join(" ")
+  }
 }
+
+const scaffold = Scaffold(config)
 ```
 
+### Additional Node.js options
+
+In addition to all the options available in the command line, there are some JS-specific options
+available:
+
+1. When `output` is used in Node directly, it may also be passed a function for each input file to
+   output into a dynamic path:
+
+    ```typescript
+    config.output = (fullPath, baseDir, baseName) => {
+      console.log({ fullPath, baseDir, baseName })
+      return path.resolve(baseDir, baseName)
+    }
+    ```
+
+2. You may add custom `helpers` to your scaffolds. Helpers are simple `(string) => string` functions
+   that transform your `data` variables into other values. See [Helpers](#helpers) for the list of
+   default helpers, or add your own to be loaded into the template parser.
+
 ## Preparing files
 
 ### Template files
@@ -146,8 +169,20 @@ Here are the built-in helpers available for use:
 | kebabCase   | `{{ kebabCase name }}`  | my-name        |
 | hyphenCase  | `{{ hyphenCase name }}` | my-name        |
 | pascalCase  | `{{ pascalCase name }}` | MyName         |
+| upperCase   | `{{ upperCase name }}`  | MYNAME         |
+| lowerCase   | `{{ lowerCase name }}`  | myname         |
 
-**Note:** These helpers are available for any data property, not exclusive to `name`.
+> These helpers are available for any data property, not exclusive to `name`.
+
+You may also add your own custom helpers using the `helpers` options when using the JS API (rather
+than the CLI). The `helpers` option takes an object whose keys are helper names, and values are
+the transformation functions. For example, `upperCase` is implemented like so:
+
+```typescript
+config.helpers = {
+  upperCase: (text) => text.toUpperCase(),
+}
+```
 
 ## Examples
 
@@ -174,15 +209,15 @@ simple-scaffold MyComponent \
     - ...
 ```
 
-#### Contents of `project/scaffold/{{Name}}.js`
+#### Contents of `project/scaffold/{{Name}}.jsx`
 
 ```js
 const React = require('react')
 
-module.exports = class {{Name}} extends React.Component {
-  render() {
+module.exports = function {{Name}}(props) {
+  return (
     <div className="{{className}}">{{Name}} Component</div>
-  }
+  )
 }
 ```
 
@@ -209,14 +244,42 @@ With `createSubFolder = false`:
     - ...
 ```
 
-#### Contents of `project/scaffold/MyComponent/MyComponent.js`
+#### Contents of `project/scaffold/MyComponent/MyComponent.jsx`
 
 ```js
 const React = require("react")
 
-module.exports = class MyComponent extends React.Component {
-  render() {
+module.exports = function MyComponent(props) {
+  return (
     <div className="myClassName">MyComponent Component</div>
-  }
+  )
 }
 ```
+
+## Contributing
+
+I welcome any issues or pull requests on GitHub. If you find a bug, or would like a new feature,
+don't hesitate to open an appropriate issue and I will do my best to reply promptly.
+
+If you are a developer and want to contribute code, here are some starting tips:
+
+1. Fork this repository
+2. Run `yarn install`
+3. Run `yarn dev` to start file watch mode
+4. Make any changes you would like
+5. Create tests for your changes
+6. Update the relevant documentation (readme, code comments, type comments)
+7. Create a PR on upstream
+
+Some tips on getting around the code:
+
+- Use `yarn dev` for development - it runs TypeScript compile in watch mode, allowing you to make
+  changes and immediately be able to try them using `yarn cmd`.
+- Use `yarn build` to build the output
+- Use `yarn test` to run tests
+- Use `yarn cmd` to use the CLI feature of Simple Scaffold from within the root directory,
+  enabling you to test different behaviors. See `yarn cmd -h` for more information.
+
+  > This requires an updated build, and does not trigger one itself. Either use `yarn dev` or
+  > `yarn build` before running this, or use `yarn build-cmd` instead, which triggers a build right
+  > before running the command with the rest of the given arguments.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "simple-scaffold",
-  "version": "1.0.0-alpha.9",
+  "version": "1.0.0-alpha.18",
   "description": "Create files based on templates",
   "repository": "https://github.com/chenasraf/simple-scaffold.git",
   "author": "Chen Asraf <inbox@casraf.com>",
@@ -9,7 +9,7 @@
   "bin": "cmd.js",
   "scripts": {
     "clean": "rm -rf dist/",
-    "build": "yarn clean && tsc && chmod -R +x ./dist && cp ./package.json ./dist/ && cp ./README.md ./dist/",
+    "build": "yarn clean && tsc && chmod -R +x ./dist && cp ./package.json ./README.md ./dist/",
     "dev": "tsc --watch",
     "start": "node dist/scaffold.js",
     "test": "jest --verbose",
@@ -23,7 +23,7 @@
     "glob": "^7.1.3",
     "handlebars": "^4.7.7",
     "lodash": "^4.17.21",
-    "massarg": "^1.0.3",
+    "massarg": "^1.0.5",
     "util.promisify": "^1.1.1"
   },
   "devDependencies": {

src/cmd.ts

@@ -1,2 +1,97 @@
-import { parseCliArgs } from "./cmd_util"
+#!/usr/bin/env node
+import massarg from "massarg"
+import chalk from "chalk"
+import { LogLevel, ScaffoldCmdConfig } from "./types"
+import { Scaffold } from "./scaffold"
+
+export function parseCliArgs(args = process.argv.slice(2)) {
+  return (
+    massarg<ScaffoldCmdConfig & { help: boolean; extras: string[] }>()
+      .main(Scaffold)
+      .option({
+        name: "name",
+        aliases: ["n"],
+        description:
+          "Name to be passed to the generated files. {{name}} and {{Name}} inside contents and file names will be replaced accordingly.",
+        isDefault: true,
+        required: true,
+      })
+      .option({
+        name: "output",
+        aliases: ["o"],
+        description: `Path to output to. If --create-sub-folder is enabled, the subfolder will be created inside this path. ${chalk.reset`${chalk.white`(default: current dir)`}`}`,
+        required: true,
+      })
+      .option({
+        name: "templates",
+        aliases: ["t"],
+        array: true,
+        description:
+          "Template files to use as input. You may provide multiple files, each of which can be a relative or absolute path, " +
+          "or a glob pattern for multiple file matching easily.",
+        required: true,
+      })
+      .option({
+        name: "overwrite",
+        aliases: ["w"],
+        boolean: true,
+        defaultValue: false,
+        description: "Enable to override output files, even if they already exist.",
+      })
+      .option({
+        name: "data",
+        aliases: ["d"],
+        description: "Add custom data to the templates. By default, only your app name is included.",
+        parse: (v) => JSON.parse(v),
+      })
+      .option({
+        name: "create-sub-folder",
+        aliases: ["s"],
+        boolean: true,
+        defaultValue: false,
+        description: "Create subfolder with the input name",
+      })
+      .option({
+        name: "quiet",
+        aliases: ["q"],
+        boolean: true,
+        defaultValue: false,
+        description: "Suppress output logs (Same as --verbose 0)",
+      })
+      .option({
+        name: "verbose",
+        aliases: ["v"],
+        defaultValue: LogLevel.Info,
+        description: `Determine amount of logs to display. The values are: ${chalk.bold`0 (none) | 1 (debug) | 2 (info) | 3 (warn) | 4 (error)`}. The provided level will display messages of the same level or higher.`,
+        parse: Number,
+      })
+      .option({
+        name: "dry-run",
+        aliases: ["dr"],
+        boolean: true,
+        defaultValue: false,
+        description:
+          "Don't emit files. This is good for testing your scaffolds and making sure they " +
+          "don't fail, without having to write actual file contents or create directories.",
+      })
+      // .example({
+      //   input: `yarn cmd -t examples/test-input/Component -o examples/test-output -d '{"property":"myProp","value":"10"}'`,
+      //   description: "Usage",
+      //   output: "",
+      // })
+      .help({
+        binName: "simple-scaffold",
+        useGlobalColumns: true,
+        usageExample: "[options]",
+        header: "Create structured files based on templates.",
+        footer: [
+          `Copyright © Chen Asraf 2021`,
+          `NPM: ${chalk.underline`https://npmjs.com/package/simple-scaffold`}`,
+          `GitHub: ${chalk.underline`https://github.com/chenasraf/simple-scaffold`}`,
+        ].join("\n"),
+      })
+      .parse(args)
+  )
+}
+
 parseCliArgs()

src/cmd_util.ts

@@ -1,89 +0,0 @@
-import massarg from "massarg"
-import chalk from "chalk"
-import { LogLevel, ScaffoldCmdConfig } from "./types"
-import { Scaffold } from "./scaffold"
-
-export function parseCliArgs(args = process.argv.slice(2)) {
-  return (
-    massarg<ScaffoldCmdConfig & { help: boolean; extras: string[] }>()
-      .main(Scaffold)
-      .option({
-        name: "name",
-        aliases: ["n"],
-        isDefault: true,
-        description:
-          "Name to be passed to the generated files. {{name}} and {{Name}} inside contents and file names will be replaced accordingly.",
-      })
-      .option({
-        name: "output",
-        aliases: ["o"],
-        description:
-          "Path to output to. If --create-sub-folder is enabled, the subfolder will be created inside this path.",
-      })
-      .option({
-        name: "templates",
-        aliases: ["t"],
-        description:
-          "Template files to use as input. You may provide multiple files, each of which can be a relative or absolute path, " +
-          "or a glob pattern for multiple file matching easily.",
-        defaultValue: [],
-        array: true,
-      })
-      .option({
-        aliases: ["w"],
-        name: "overwrite",
-        description: "Enable to override output files, even if they already exist.",
-        defaultValue: false,
-        boolean: true,
-      })
-      .option({
-        aliases: ["d"],
-        name: "data",
-        description: "Add custom data to the templates. By default, only your app name is included.",
-        parse: (v) => JSON.parse(v),
-      })
-      .option({
-        aliases: ["s"],
-        name: "create-sub-folder",
-        description: "Create subfolder with the input name",
-        defaultValue: false,
-        boolean: true,
-      })
-      .option({
-        aliases: ["q"],
-        name: "quiet",
-        description: "Suppress output logs (Same as --verbose 0)",
-        defaultValue: false,
-        boolean: true,
-      })
-      .option({
-        aliases: ["v"],
-        name: "verbose",
-        description: `Determine amount of logs to display. The values are: ${chalk.bold`0 (none) | 1 (debug) | 2 (info) | 3 (warn) | 4 (error)`}. The provided level will display messages of the same level or higher.`,
-        defaultValue: LogLevel.Info,
-        parse: Number,
-      })
-      .option({
-        aliases: ["dr"],
-        name: "dry-run",
-        description:
-          "Don't emit files. This is good for testing your scaffolds and making sure they " +
-          "don't fail, without having to write actual file contents or create directories.",
-        defaultValue: false,
-        boolean: true,
-      })
-      // .example({
-      //   input: `yarn cmd -t examples/test-input/Component -o examples/test-output -d '{"property":"myProp","value":"10"}'`,
-      //   description: "Usage",
-      //   output: "",
-      // })
-      .help({
-        binName: "simple-scaffold",
-        useGlobalColumns: true,
-        usageExample: "[options]",
-        header: "Create structured files based on templates.",
-        footer: `Copyright © Chen Asraf 2021\nNPM: ${chalk.underline`https://npmjs.com/package/massarg`}\nGitHub: ${chalk.underline`https://github.com/chenasraf/massarg`}`,
-      })
-      .parse(args)
-  )
-}

src/scaffold.ts

@@ -14,13 +14,17 @@ import {
   pascalCase,
   isDir,
   removeGlob,
+  makeRelativePath,
+  registerHelpers,
 } from "./utils"
 import { LogLevel, ScaffoldConfig } from "./types"
 
-export async function Scaffold(config: ScaffoldConfig) {
+export async function Scaffold({ ...options }: ScaffoldConfig) {
+  options.output ??= process.cwd()
+
+  registerHelpers(options)
   try {
-    const options = { ...config }
-    const data = { name: options.name, Name: pascalCase(options.name), ...options.data }
+    options.data = { name: options.name, Name: pascalCase(options.name), ...options.data }
     log(options, LogLevel.Debug, "Full config:", {
       name: options.name,
       templates: options.templates,
@@ -29,43 +33,69 @@ export async function Scaffold(config: ScaffoldConfig) {
       data: options.data,
       overwrite: options.overwrite,
       quiet: options.quiet,
+      helpers: Object.keys(options.helpers ?? {}),
+      verbose: `${options.verbose} (${Object.keys(LogLevel).find(
+        (k) => (LogLevel[k as any] as unknown as number) === options.verbose!
+      )})`,
     })
-    log(options, LogLevel.Info, "Data:", data)
-    for (let template of config.templates) {
+    log(options, LogLevel.Info, "Data:", options.data)
+    for (let template of options.templates) {
       try {
-        const _isGlob = template.includes("*")
+        const _isGlob = glob.hasMagic(template)
+        if (!_isGlob && !(await pathExists(template))) {
+          const err: NodeJS.ErrnoException = new Error(`ENOENT, no such file or directory ${template}`)
+          err.code = "ENOENT"
+          err.path = "non-existing-input"
+          err.errno = -2
+          throw err
+        }
         const _nonGlobTemplate = _isGlob ? removeGlob(template) : template
-        const _isDir = _isGlob ? false : await isDir(template)
-        const _shouldAddGlob = !_isGlob && !_isDir
+        log(options, LogLevel.Debug, "before isDir", "isGlob:", _isGlob, template)
+        const _isDir = _isGlob ? true : await isDir(template)
+        log(options, LogLevel.Debug, "after isDir", _isDir)
+        const _shouldAddGlob = !_isGlob && _isDir
+        const origTemplate = template
         if (_shouldAddGlob) {
           template = template + "/**/*"
         }
-        const files = await promisify(glob)(template, { dot: true, debug: false })
-        for (const templatePath of files) {
-          if (!(await isDir(templatePath))) {
-            const basePath = path
-              .resolve(
-                process.cwd(),
-                _isDir
-                  ? templatePath.replace(template, "")
-                  : path.dirname(removeGlob(templatePath).replace(_nonGlobTemplate, ""))
-              )
-              .replace(process.cwd() + "/", "")
-              .replace(process.cwd(), "")
-            log(
-              options,
-              LogLevel.Debug,
-              `\ntemplate: ${template}\ntemplatePath: ${templatePath}, \nbase path: ${basePath}\n`
-            )
-            await handleTemplateFile(templatePath, basePath, options, data)
+        log(options, LogLevel.Debug, "before glob")
+        const files = await promisify(glob)(template, {
+          dot: true,
+          debug: options.verbose === LogLevel.Debug,
+          nodir: true,
+        })
+        log(options, LogLevel.Debug, "after glob")
+        for (const inputFilePath of files) {
+          if (await isDir(inputFilePath)) {
+            continue
           }
+          const relPath = makeRelativePath(path.dirname(removeGlob(inputFilePath).replace(_nonGlobTemplate, "")))
+          const basePath = path
+            .resolve(process.cwd(), relPath)
+            .replace(process.cwd() + "/", "")
+            .replace(process.cwd(), "")
+          log(
+            options,
+            LogLevel.Debug,
+            `\nprocess.cwd(): ${process.cwd()}`,
+            `\norigTemplate: ${origTemplate}`,
+            `\nrelPath: ${relPath}`,
+            `\ntemplate: ${template}`,
+            `\ninputFilePath: ${inputFilePath}`,
+            `\nnonGlobTemplate: ${_nonGlobTemplate}`,
+            `\nbasePath: ${basePath}`,
+            `\nisDir: ${_isDir}`,
+            `\nisGlob: ${_isGlob}`,
+            `\n`
+          )
+          await handleTemplateFile(inputFilePath, basePath, options, options.data)
         }
       } catch (e: any) {
         handleErr(e)
       }
     }
   } catch (e: any) {
-    console.error(e)
+    log(options, LogLevel.Error, e)
     throw e
   }
 }
@@ -79,35 +109,27 @@ async function handleTemplateFile(
   return new Promise(async (resolve, reject) => {
     try {
       const inputPath = path.resolve(process.cwd(), templatePath)
-      const outputPathOpt = getOptionValueForFile(inputPath, data, options.output)
+      const outputPathOpt = getOptionValueForFile(options, inputPath, data, options.output)
       const outputDir = path.resolve(
         process.cwd(),
         ...([outputPathOpt, basePath, options.createSubFolder ? options.name : undefined].filter(Boolean) as string[])
       )
+      const outputPath = handlebarsParse(options, path.join(outputDir, path.basename(inputPath)), data).toString()
       log(
         options,
         LogLevel.Debug,
         `\nParsing ${templatePath}`,
         `\nBase path: ${basePath}`,
         `\nFull input path: ${inputPath}`,
-        `\nFull output path: ${outputDir}\n`
+        `\nOutput Path Opt: ${outputPathOpt}`,
+        `\nFull output dir: ${outputDir}`,
+        `\nFull output path: ${outputPath}`,
+        `\n`
       )
-      const outputPath = path.join(outputDir, handlebarsParse(path.basename(inputPath), data))
-      const overwrite = getOptionValueForFile(inputPath, data, options.overwrite ?? false)
+      const overwrite = getOptionValueForFile(options, inputPath, data, options.overwrite ?? false)
       const exists = await pathExists(outputPath)
 
-      log(
-        options,
-        LogLevel.Debug,
-        "Filename parsed:",
-        handlebarsParse(path.basename(inputPath), data),
-        "Orig:",
-        path.basename(inputPath)
-        // "Test:",
-        // handlebarsParse("{{name}} {{name pascalCase}}", data)
-      )
-
-      await createDirIfNotExists(outputDir, options)
+      await createDirIfNotExists(path.dirname(outputPath), options)
 
       log(options, LogLevel.Info, `Writing to ${outputPath}`)
       if (!exists || overwrite) {
@@ -115,10 +137,11 @@ async function handleTemplateFile(
           log(options, LogLevel.Info, `File ${outputPath} exists, overwriting`)
         }
         const templateBuffer = await readFile(inputPath)
-        const outputContents = handlebarsParse(templateBuffer, data)
+        const outputContents = handlebarsParse(options, templateBuffer, data)
 
         if (!options.dryRun) {
           await writeFile(outputPath, outputContents)
+          log(options, LogLevel.Info, "Done.")
         } else {
           log(options, LogLevel.Info, "Content output:")
           log(options, LogLevel.Info, outputContents)

src/types.ts

@@ -11,18 +11,76 @@ export type FileResponseFn<T> = (fullPath: string, basedir: string, basename: st
 export type FileResponse<T> = T | FileResponseFn<T>
 
 export interface ScaffoldConfig {
-  /** The name supplied for the output templates */
+  /**
+   * Name to be passed to the generated files. `{{name}}` and `{{Name}}` inside contents and file names will be replaced
+   * accordingly.
+   */
   name: string
-  /** Template input files/dirs/glob patterns to use as template input. These will be copied to the output directory. */
+
+  /**
+   * Template files to use as input. You may provide multiple files, each of which can be a relative or absolute path,
+   * or a glob pattern for multiple file matching easily. (default: current working directory)
+   */
   templates: string[]
-  /** Output directory to put scaffolded files in. */
+
+  /** Path to output to. If `createSubFolder` is `true`, the subfolder will be created inside this path. */
   output: FileResponse<string>
+
+  /**
+   * Create subfolder with the input name (default: `false`)
+   */
   createSubFolder?: boolean
+
+  /**
+   * Add custom data to the templates. By default, only your app name is included as `{{name}}` and `{{Name}}`.
+   */
   data?: Record<string, string>
+
+  /**
+   * Enable to override output files, even if they already exist. (default: `false`)
+   *
+   * You may supply a function to this option, which can take the arguments `(fullPath, baseDir, baseName)` and returns
+   * a string, to return a dynamic path for each file.
+   */
   overwrite?: FileResponse<boolean>
+
+  /** Suppress output logs (Same as `verbose: 0` or `verbose: LogLevel.None`) */
   quiet?: boolean
+
+  /**
+   * Determine amount of logs to display.
+   *
+   * The values are: `0 (none) | 1 (debug) | 2 (info) | 3 (warn) | 4 (error)`. The provided level will display messages
+   * of the same level or higher. (default: `2 (info)`)
+   * @see LogLevel
+   */
   verbose?: LogLevel
+
+  /**
+   * Don't emit files. This is good for testing your scaffolds and making sure they don't fail, without having to write
+   * actual file contents or create directories. (default: `false`)
+   */
   dryRun?: boolean
+
+  /**
+   * Additional helpers to add to the template parser. Provide an object whose keys are the name of the function to add,
+   * and the value is the helper function itself. The signature of helpers is as follows:
+   * ```typescript
+   * (text: string) => string
+   * ```
+   *
+   * A full example might be:
+   *
+   * ```typescript
+   * Scaffold({
+   *   //...
+   *   helpers: {
+   *     upperCamelCase: (text) => camelCase(text).toUpperCase()
+   *   }
+   * })
+   * ```
+   */
+  helpers?: Record<string, (text: string) => string>
 }
 export interface ScaffoldCmdConfig {
   name: string
@@ -32,5 +90,6 @@ export interface ScaffoldCmdConfig {
   data?: Record<string, string>
   overwrite: boolean
   quiet: boolean
+  verbose: LogLevel
   dryRun: boolean
 }

src/utils.ts

@@ -10,17 +10,23 @@ import { promises as fsPromises } from "fs"
 import chalk from "chalk"
 const { stat, access, mkdir } = fsPromises
 
-const helpers = {
+export const defaultHelpers: Exclude<ScaffoldConfig["helpers"], undefined> = {
   camelCase,
   snakeCase,
   startCase,
   kebabCase,
   hyphenCase: kebabCase,
   pascalCase,
+  lowerCase: (text) => text.toLowerCase(),
+  upperCase: (text) => text.toUpperCase(),
 }
 
-for (const helperName in helpers) {
-  Handlebars.registerHelper(helperName, helpers[helperName as keyof typeof helpers])
+export function registerHelpers(options: ScaffoldConfig) {
+  const _helpers = { ...defaultHelpers, ...options.helpers }
+  for (const helperName in _helpers) {
+    log(options, LogLevel.Debug, `Registering helper: ${helperName}`)
+    Handlebars.registerHelper(helperName, _helpers[helperName as keyof typeof _helpers])
+  }
 }
 
 export function handleErr(err: NodeJS.ErrnoException | null) {
@@ -28,7 +34,7 @@ export function handleErr(err: NodeJS.ErrnoException | null) {
 }
 
 export function log(options: ScaffoldConfig, level: LogLevel, ...obj: any[]) {
-  if (options.quiet || options.verbose === LogLevel.None || (options.verbose ?? LogLevel.Info) > level) {
+  if (options.quiet || options.verbose === LogLevel.None || level <= (options.verbose ?? LogLevel.Info)) {
     return
   }
   const levelColor: Record<LogLevel, keyof typeof chalk> = {
@@ -39,8 +45,17 @@ export function log(options: ScaffoldConfig, level: LogLevel, ...obj: any[]) {
     [LogLevel.Error]: "red",
   }
   const chalkFn: any = chalk[levelColor[level]]
-  console["log"](...obj.map((i) => (typeof i === "object" ? chalkFn(JSON.stringify(i, undefined, 1)) : chalkFn(i))))
-  // console["log"](...obj)
+  const key: "log" | "warn" | "error" = level === LogLevel.Error ? "error" : level === LogLevel.Warning ? "warn" : "log"
+  const logFn: any = console[key]
+  logFn(
+    ...obj.map((i) =>
+      i instanceof Error
+        ? chalkFn(i, JSON.stringify(i, undefined, 1), i.stack)
+        : typeof i === "object"
+        ? chalkFn(JSON.stringify(i, undefined, 1))
+        : chalkFn(i)
+    )
+  )
 }
 
 export async function createDirIfNotExists(dir: string, options: ScaffoldConfig): Promise<void> {
@@ -52,6 +67,7 @@ export async function createDirIfNotExists(dir: string, options: ScaffoldConfig)
 
   if (!(await pathExists(dir))) {
     try {
+      log(options, LogLevel.Debug, `Creating dir ${dir}`)
       await mkdir(dir)
       return
     } catch (e: any) {
@@ -64,6 +80,7 @@ export async function createDirIfNotExists(dir: string, options: ScaffoldConfig)
 }
 
 export function getOptionValueForFile<T>(
+  options: ScaffoldConfig,
   filePath: string,
   data: Record<string, string>,
   fn: FileResponse<T>,
@@ -74,15 +91,24 @@ export function getOptionValueForFile<T>(
   }
   return (fn as FileResponseFn<T>)(
     filePath,
-    path.dirname(handlebarsParse(filePath, data)),
-    path.basename(handlebarsParse(filePath, data))
+    path.dirname(handlebarsParse(options, filePath, data).toString()),
+    path.basename(handlebarsParse(options, filePath, data).toString())
   )
 }
 
-export function handlebarsParse(templateBuffer: Buffer | string, data: Record<string, string>) {
-  const parser = Handlebars.compile(templateBuffer.toString(), { noEscape: true })
-  const outputContents = parser(data)
-  return outputContents
+export function handlebarsParse(
+  options: ScaffoldConfig,
+  templateBuffer: Buffer | string,
+  data: Record<string, string>
+) {
+  try {
+    const parser = Handlebars.compile(templateBuffer.toString(), { noEscape: true })
+    const outputContents = parser(data)
+    return outputContents
+  } catch {
+    log(options, LogLevel.Warning, "Couldn't parse file with handlebars, returning original content")
+    return templateBuffer
+  }
 }
 
 export async function pathExists(filePath: string): Promise<boolean> {
@@ -109,3 +135,7 @@ export async function isDir(path: string): Promise<boolean> {
 export function removeGlob(template: string) {
   return template.replace(/\*/g, "").replace(/\/\//g, "/")
 }
+
+export function makeRelativePath(str: string): string {
+  return str.startsWith("/") ? str.slice(1) : str
+}

tests/scaffold.test.ts

@@ -2,6 +2,8 @@ import mockFs from "mock-fs"
 import FileSystem from "mock-fs/lib/filesystem"
 import Scaffold from "../src/scaffold"
 import { readdirSync, readFileSync } from "fs"
+import { Console } from "console"
+import { defaultHelpers } from "../src/utils"
 
 const fileStructNormal = {
   input: {
@@ -19,21 +21,46 @@ const fileStructWithData = {
 
 const fileStructNested = {
   input: {
-    "{{name}}-1.text": "This should be in root",
+    "{{name}}-1.txt": "This should be in root",
     "{{Name}}": {
       "{{name}}-2.txt": "Hello, my value is {{value}}",
+      moreNesting: {
+        "{{name}}-3.txt": "Hi! My value is actually NOT {{value}}!",
+      },
     },
   },
   output: {},
 }
 
+const defaultHelperNames = Object.keys(defaultHelpers)
+const fileStructHelpers = {
+  input: {
+    defaults: defaultHelperNames.reduce<Record<string, string>>(
+      (all, cur) => ({ ...all, [cur + ".txt"]: `{{ ${cur} name }}` }),
+      {}
+    ),
+    custom: {
+      "add1.txt": "{{ add1 name }}",
+    },
+  },
+  output: {},
+}
+// let logsTemp: any = []
+// let logMock: any
 function withMock(fileStruct: FileSystem.DirectoryItems, testFn: jest.EmptyFunction): jest.EmptyFunction {
   return () => {
     beforeEach(() => {
+      // console.log("Mocking:", fileStruct)
+      console = new Console(process.stdout, process.stderr)
+
       mockFs(fileStruct)
+      // logMock = jest.spyOn(console, 'log').mockImplementation((...args) => {
+      //   logsTemp.push(args)
+      // })
     })
     testFn()
     afterEach(() => {
+      // console.log("Restoring mock")
       mockFs.restore()
     })
   }
@@ -48,9 +75,8 @@ describe("Scaffold", () => {
           name: "app_name",
           output: "output",
           templates: ["input"],
-          quiet: true,
+          verbose: 0,
         })
-
         const data = readFileSync(process.cwd() + "/output/app_name.txt")
         expect(data.toString()).toBe("Hello, my app is app_name")
       })
@@ -61,7 +87,7 @@ describe("Scaffold", () => {
           output: "output",
           templates: ["input"],
           createSubFolder: true,
-          quiet: true,
+          verbose: 0,
         })
 
         const data = readFileSync(process.cwd() + "/output/app_name/app_name.txt")
@@ -79,7 +105,7 @@ describe("Scaffold", () => {
           output: "output",
           templates: ["input"],
           data: { value: "1" },
-          quiet: true,
+          verbose: 0,
         })
 
         await Scaffold({
@@ -87,7 +113,7 @@ describe("Scaffold", () => {
           output: "output",
           templates: ["input"],
           data: { value: "2" },
-          quiet: true,
+          verbose: 0,
         })
 
         const data = readFileSync(process.cwd() + "/output/app_name.txt")
@@ -100,7 +126,7 @@ describe("Scaffold", () => {
           output: "output",
           templates: ["input"],
           data: { value: "1" },
-          quiet: true,
+          verbose: 0,
         })
 
         await Scaffold({
@@ -109,7 +135,7 @@ describe("Scaffold", () => {
           templates: ["input"],
           data: { value: "2" },
           overwrite: true,
-          quiet: true,
+          verbose: 0,
         })
 
         const data = readFileSync(process.cwd() + "/output/app_name.txt")
@@ -121,9 +147,13 @@ describe("Scaffold", () => {
   describe(
     "errors",
     withMock(fileStructNormal, () => {
-      let consoleMock: jest.SpyInstance
+      let consoleMock1: jest.SpyInstance
       beforeAll(() => {
-        consoleMock = jest.spyOn(console, "error").mockImplementation(() => void 0)
+        consoleMock1 = jest.spyOn(console, "error").mockImplementation(() => void 0)
+      })
+
+      afterAll(() => {
+        consoleMock1.mockRestore()
       })
 
       test("should throw for bad input", async () => {
@@ -133,16 +163,12 @@ describe("Scaffold", () => {
             output: "output",
             templates: ["non-existing-input"],
             data: { value: "1" },
-            quiet: true,
+            verbose: 0,
           })
         ).rejects.toThrow()
 
         expect(() => readFileSync(process.cwd() + "/output/app_name.txt")).toThrow()
       })
-
-      afterAll(() => {
-        consoleMock.mockRestore()
-      })
     })
   )
 
@@ -155,7 +181,7 @@ describe("Scaffold", () => {
           output: (fullPath, basedir, basename) => `custom-output/${basename.split(".")[0]}`,
           templates: ["input"],
           data: { value: "1" },
-          quiet: true,
+          verbose: 0,
         })
         const data = readFileSync(process.cwd() + "/custom-output/app_name/app_name.txt")
         expect(data.toString()).toBe("Hello, my app is app_name")
@@ -169,14 +195,80 @@ describe("Scaffold", () => {
       test("should maintain input structure on output", async () => {
         await Scaffold({
           name: "app_name",
-          output: "./",
+          output: "output",
           templates: ["input"],
           data: { value: "1" },
-          quiet: true,
+          verbose: 0,
         })
 
-        const dir = readdirSync(process.cwd())
+        const rootDir = readdirSync(process.cwd() + "/output")
+        const dir = readdirSync(process.cwd() + "/output/AppName")
+        const nestedDir = readdirSync(process.cwd() + "/output/AppName/moreNesting")
+        expect(rootDir).toHaveProperty("length")
         expect(dir).toHaveProperty("length")
+        expect(nestedDir).toHaveProperty("length")
+
+        const rootFile = readFileSync(process.cwd() + "/output/app_name-1.txt")
+        const oneDeepFile = readFileSync(process.cwd() + "/output/AppName/app_name-2.txt")
+        const twoDeepFile = readFileSync(process.cwd() + "/output/AppName/moreNesting/app_name-3.txt")
+        expect(rootFile.toString()).toEqual("This should be in root")
+        expect(oneDeepFile.toString()).toEqual("Hello, my value is 1")
+        expect(twoDeepFile.toString()).toEqual("Hi! My value is actually NOT 1!")
+      })
+    })
+  )
+
+  describe(
+    "helpers",
+    withMock(fileStructHelpers, () => {
+      const _helpers: Record<string, (text: string) => string> = {
+        add1: (text) => text + " 1",
+      }
+
+      describe("default helpers", () => {
+        test("should work", async () => {
+          await Scaffold({
+            name: "app_name",
+            output: "output",
+            templates: ["input"],
+            verbose: 0,
+            helpers: _helpers,
+          })
+
+          const results = {
+            camelCase: "appName",
+            snakeCase: "app_name",
+            startCase: "App Name",
+            kebabCase: "app-name",
+            hyphenCase: "app-name",
+            pascalCase: "AppName",
+            lowerCase: "app_name",
+            upperCase: "APP_NAME",
+          }
+          for (const key in results) {
+            const file = readFileSync(process.cwd() + `/output/defaults/${key}.txt`)
+            expect(file.toString()).toEqual(results[key as keyof typeof results])
+          }
+        })
+      })
+      describe("custom helpers", () => {
+        test("should work", async () => {
+          await Scaffold({
+            name: "app_name",
+            output: "output",
+            templates: ["input"],
+            verbose: 0,
+            helpers: _helpers,
+          })
+
+          const results = {
+            add1: "app_name 1",
+          }
+          for (const key in results) {
+            const file = readFileSync(process.cwd() + `/output/custom/${key}.txt`)
+            expect(file.toString()).toEqual(results[key as keyof typeof results])
+          }
+        })
       })
     })
   )

yarn.lock

@@ -932,7 +932,7 @@ chalk@2.4.2, chalk@^2.0.0:
     escape-string-regexp "^1.0.5"
     supports-color "^5.3.0"
 
-chalk@^4.0.0, chalk@^4.1.1:
+chalk@^4.0.0:
   version "4.1.1"
   resolved "https://registry.yarnpkg.com/chalk/-/chalk-4.1.1.tgz#c80b3fab28bf6371e6863325eee67e618b77e6ad"
   integrity sha512-diHzdDKxcU+bAsUboHLPEDQiw0qEe0qd7SYUn3HgcFlWgbDcfLGswOHYeGrHKzG9z6UYf01d9VFMfZxPM1xZSg==
@@ -2161,12 +2161,12 @@ makeerror@1.0.x:
   dependencies:
     tmpl "1.0.x"
 
-massarg@^1.0.3:
-  version "1.0.3"
-  resolved "https://registry.yarnpkg.com/massarg/-/massarg-1.0.3.tgz#228cf2d84896924b6b12021ea23ed9a9077e15b7"
-  integrity sha512-LYb4XvAQ+PbBClyfkn9B4JtfwycfpnOnGIznALt9YLnrmQaCcXXJBQsG5SA/2w+bmLOeYRoR9GqqFLyaniCn9g==
+massarg@^1.0.5:
+  version "1.0.5"
+  resolved "https://registry.yarnpkg.com/massarg/-/massarg-1.0.5.tgz#3dfd49bb63bfca4b0371a2f0ffc7580a9a6cc7a0"
+  integrity sha512-gkJHZsNfeMurpVPKojCiT2lnG2cSxHPAXZSg+gCLIgCf5bGn7pKOsoeu4qVAc5mlBxV2l/hA1yojt+ZsJd8SDg==
   dependencies:
-    chalk "^4.1.1"
+    chalk "^4.1.2"
     lodash "^4.17.21"
 
 merge-stream@^2.0.0: