affected-files

Affected files

Returns a list of js/ts(x) files, which affected in current branch compared to mergeBase (origin/master by default).

CLI

$ npm run afiles
// or
$ yarn afiles

Affected files: (modified, **affected only**)

  **__tests__/common.spec.ts**
  affected-files.config.js
  bin/cli.js
  src/index.ts
  src/options.ts
  src/types.ts

total: 6

Done in 0.82s.

Explanation

Lets say you have a repo with files

a.js
dependent-from-a.js
dependent-from--dependent-from-a.js
not-dependent-from-a.js

If a.js was modified in your merge request, files dependent-from-a.js and dependent-from--dependent-from-a.js also affected. So, affected-files will return

[ 'a.js', 'dependent-from-a.js', 'dependent-from--dependent-from-a.js' ]

Extensions

.js, .jsx, .ts, .tsx are supported. Other extensions – not yet.

Configuration

import getAffected from 'affected-files'
// import { getAffectedSync } from 'affected-files'

const affected = await getAffected(options)

All options are optional.

Option	default	description
mergeBase	origin/master	Branch or revision which will be used to take a git diff.
cwd	process.cwd()	Absolute path of cwd folder, where to find files.
missing	[]	An array of strings, which should not be resolved. For example, in most cases there is no need to resolve react. Used for perfprmance optimization. Also, it could be used in tuple form filename.js ≥≥≥ ../dependency, which disables ../dependency resolving only in filename.js.
pattern	**/*	Glob pattern of your source files.
modified	git diff ...	An array of modified files paths. By default it is evaluated from git ls-files relative to mergeBase, but you could define custom modified array.
usink	[]	An array of glob patterns of files, which considered as universal sink in dependency graph. That means, every tracked file in your repo is dependent from every usink file. For example, you need to build full storybook every time you have affected something in ./.storybook. Then just use getAffected(pattern, { usink: '.storybook/*' }). Note: every usink must match pattern
tracked	git ls-tree ...	An array of files, which would be used for dependency tree building. E.g. files in node_modules are not participating in dependency traversing. Note: by default untracked but non-ignored files are included.
absolute	false	If true, returns absolute paths of affected files, relative to options.cwd otherwise.
dot	false	If true, includes folders and files, starts with dot.

affected-files.config.js

Place this file in the project root folder (cwd), and export your options.

Get all dependent files from single file

yarn afiles src/options.ts

custom modified: src/options.ts
affected files (modified, **affected only**):

  **__tests__/common.spec.ts**
  src/index.ts
  src/options.ts

total: 3

Using in CI

• affected-files uses git, so, be sure, git is available in docker image
• affected-files uses origin/master revision to compare, so, be sure a) origin/master is exists on runner b) origin/master is up to date.

git fetch && git rev-parse origin/master – that cmd resolves all problems, or fail otherwise. Use it before using affected-files.

If git is not available only on some docker images, you could save affected list to file and use it everywhere in CI via artifacts.