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What is DX Scanner?

DX Scanner is an open source CLI tool that allows you to “measure” Developer Experience directly based on your source code. DX Scanner recommends practices that can help you with improving your product development. You can fix some problems automatically with just one command.

What language is supported?

Language	Supported
JavaScript/TypeScript	✅
Java/Kotlin	✅
Python	✅
PHP	🚧
C++	🚧
C#	🚧
Ruby	🚧

Table of Contents

• Supported version control systems
• Getting Started
  • Installation
  • Usage
    • Commands
    • Options for dx-scanner run
    • Auto-fixer
• Supported Languages
• Configuration
  • Practices
  • GitHub CI Action

Which version control system can you use?

Sure you can use GitHub. You can also use GitLab and Bitbucket no matter if it is public or private repo!

examples:

dx-scanner run https://github.com/DXHeroes/dx-scanner

dx-scanner run https://gitlab.com/ubon-refer/smart-refer-api

dx-scanner run https://bitbucket.org/maras333/node-api-with-ts

Getting Started 🏁

Installation

• with NPM

  npm install -g dx-scanner

• with Yarn

  yarn global add dx-scanner

Usage

  dx-scanner run [path] [options]

Example:

  dx-scanner run https://github.com/DXHeroes/dx-scanner

Commands

Usage: dx-scanner [command] [options] 

Options:
  -V, --version         output the version number
  -h, --help            output usage information

Commands:
  run [options] [path]  Scan your project for possible DX recommendations
  init                  Initialize DX Scanner configuration
  practices [options]   List all practices id with name and impact

Aliases:
  dxs
  dxscanner

Options for dx-scanner run

Usage: dx-scanner run [path] [options]

Scan your project for possible DX recommendations

Options:
  -a --authorization <authorization>  credentials to the repository (in format "token" or "username:token"; can be set as ENV variable DXSCANNER_GIT_SERVICE_TOKEN)
  --ci                                CI mode (default: false)
  -d --details                        print details in reports
  --fail <impact>                     exits process with code 1 for any non-practicing condition of given level (high|medium|small|hint|off|all) (default: "high")
  --fix                               tries to fix problems automatically (default: false)
  --fixPattern <pattern>              fix only rules with IDs matching the regex
  -j --json                           print report in JSON (default: false)
  -r --recursive                      scan all components recursively in all sub folders (default: false)
  -h, --help                          output usage information

Examples:
  dx-scanner run
  dx-scanner run ./ --fail=high
  dx-scanner run github.com/DXHeroes/dx-scanner

Auto-fixer

Fix problems detected by DX Scanner automatically.

dx-scanner run [PATH] --fix

This will try to fix all fixable practices which are not being practices yet. If you want to omit a practice from automatic fixing, you can do it in the configuration file (see below).

You can also specify fixPattern flag to fix only a subset of fixable practices.

dx-scanner run [PATH] --fix --fixPattern=lint

Please note, that fixPattern flag overrides fix settings from configuration file. Therefore practices ommited from fixing by configuration file, but included through fixPattern will be fixed.

Configuration ⚙️

Add dxscannerrc.* config file to change default configuration settings. It can be a .json, .yml, or even a dotfile!

You can also run dx-scanner init to initialize config automatically.

Practices

You can switch off practices that you do not want to scan, change their impact level, and even override their default values. To do so, refer to the id of the practice and specify your configuration.

List of All Practices 🔍

Practice	Impact	Language Independent	JavaScript/TypeScript	Java/Kotlin	Python
Create a Readme File	high	✅	✅	✅	✅
Create a License File	medium	✅	✅	✅	✅
Create a Lockfile	high	✅	✅	✅	✅
Create a .gitignore	high	✅	✅	✅	✅
Write in Typescript	medium	❌	✅	❌	❌
Set .gitignore Correctly	high	❌	✅	✅	❌
Use Continuous Integration	high	✅	✅	✅	✅
Use Docker	small	✅	✅	✅	✅
Use .editorconfig	small	✅	✅	✅	✅
Format your code automatically	small	❌	✅	❌	❌
Use ESLint	medium	❌	✅	❌	❌
ESLint Without Errors	medium	❌	✅	❌	❌
Use a different linter	medium	❌	✅	❌	❌
Use JS Frontend Testing Framework	medium	❌	✅	❌	❌
Use JS Frontend Build Tools	medium	❌	✅	❌	❌
Use JS Backend Testing Frameworks	high	❌	✅	❌	❌
Use a JS Logging Library	small	❌	✅	❌	❌
Use Package Management	high	❌	✅	✅	❌
Configure Scripts in package.json	medium	❌	✅	❌	❌
Update Dependencies of Major Level	small	❌	✅	✅	❌
Update Dependencies of Minor and Patch Level	high	❌	✅	✅	❌
Do PullRequests	medium	✅	✅	✅	✅
Break down large pull requests into smaller ones	medium	✅	✅	✅	✅
Solve Pull Requests Continuously	medium	✅	✅	✅	✅
Solve Issues Continuously	medium	✅	✅	✅	✅
Write Commit Messages by Convention	small	✅	✅	✅	✅
Use Mocking Frameworks for Tests	small	❌	✅	✅	❌
Use Testing Frameworks	high	❌	❌	✅	❌
Use a Java Logging Dependency	small	❌	❌	✅	❌
Use a Java Linter Dependency	small	❌	❌	✅	❌
Use Java Class Naming Convention	small	❌	❌	✅	❌
Security vulnerabilities detected	high	❌	✅	❌	❌

Possible impact:

high

medium

small

hint

off

Example dxscannerrc.json:

{
    "practices": {
        "JavaScript.GitignoreCorrectlySet": "medium",
        "JavaScript.LoggerUsed": "off",
        "LanguageIndependent.DoesPullRequests": {
          "impact": "small"
        },
        "JavaScript.ESLintWithoutErrorsPractice": {
          "fix": true
        },
        "LanguageIndependent.ThinPullRequestsPractice": {
          "impact": "high",
          "override": {
            "measurePullRequestCount": 500
          }
        }
    }
}

In order to override the default values of certain practices, specify override and nest the correct overridable variables.

Example dxscannerrc.yaml:

---
practices:
  JavaScript.GitignoreCorrectlySet: medium
  JavaScript.LoggerUsed: 'off'
  LanguageIndependent.DoesPullRequests:
    impact: small
  JavaScript.ESLintWithoutErrorsPractice:
    fix: true
  LanguageIndependent.ThinPullRequestsPractice:
    impact: high
    override:
      measurePullRequestCount: 500

Github CI Action

Basic example: run DX Scanner on each push to the repo

Create .github/workflows/main.yml.

name: DX Scanner
on: push
jobs:
  dx-scanner:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v1
      - name: Runs DX Scanner on the code
        uses: DXHeroes/dx-scanner@master
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}

Generate your Github personal token and set it as an encrypted secret named GITHUB_TOKEN.

Score Computation 💯

The impact of each practice is represented by a specific value. DX Scanner uses these values to calculate the overall DX Score.

high = 100 points

medium = 75 points

small = 50 points 

hint = 25 points

The practices you have switched off are not included in the calculation (0 points).

Contributing 👩‍💻 👨‍💻

Feel free to contribute to our DX Scanner. Please follow the Contribution Guide.

License 📝

The DX Scanner open source project is licensed under the MIT.

Contributors ✨

Many thanks to these wonderful people (emoji key):

Prokop Simek 💻 🚧

adelkah 💻 🚧

Radek Holý 💻

Vratislav Kalenda 💻 🤔

Petr Vnenk 💻

Cuong Nguyen 💻

vlasy 💻

This project follows the all-contributors specification. Any kind of contributions are welcome!