Linter & Git Hooks for TypeScript | NestJS

Config files

eslint

• Validate code format
  • npm run lint

commitlint

• Validate commit message
  • Auto trigger when commit
  • type-required(scope-optional): subject-required
    emptyline-required
    body-required

Commitizen

• Generate valid commit message through interactive Q&A
  • npm run commit
    • -S stand for GPG signed commit
  • Note that the generation for body is not good enough (at least to me)
    • The body wrapping is not friendly enough (use | as line break rather than enter)
    • The length limitation is unconfigurable as of no
      • CZ use 100 as default but our commitlint setting requires 72
  • The better solution is to let CZ generate header for you, then post it to Vim, which helps you on auto wrap
    • Use empty body and force quit when confirm

Husky

• Git hooks for commit-msg, pre-commit, and pre-push
  • commit-msg: trigger the commitlint
  • pre-commit: trigger the GPG key check, eslint, and unit test (changed files only)
  • pre-push: trigger the WIP commit check, unit test with coverage, e2e test, and docs generation using compodoc
    • To gen docs: npm run doc:gen

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Environment set up

Linter

ESLint for JavaScript

JS only

• npm install eslint --save-dev

TypeScript ESLint for TypeScript

Add TS support

• npm install @typescript-eslint/eslint-plugin@^2.12.0 --save-dev

commitlint for Git commit

Follow the Conventional Commits

• npm install @commitlint/config-conventional@^8.3.4 --save-dev
• npm install @commitlint/cli@^8.3.5 --save-dev

commitizen

• npm install commitizen@^4.0.3 --save-dev
• npm install cz-customizable@^6.2.0 --save-dev
  • Add config to package.json
    • "config": {"commitizen": {"path": "./node_modules/cz-customizable"}}

Git Hooks

Husky for pre-commit, pre-push, and commit message hooks

• npm install husky@^4.2.3 --save-dev

Compodoc for docs auto generation

• npm install @compodoc/compodoc@^1.1.11 --save-dev
  • NestJS documentation tutorial
    • compodoc src -p tsconfig.json -n 'Title Here' --hideGenerator

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License

• These config files are licensed under the MIT License