🎉 First commit

.changeset/config.json

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+{
+  "$schema": "https://unpkg.com/@changesets/config@1.3.0/schema.json",
+  "changelog": "@changesets/cli/changelog",
+  "commit": false,
+  "linked": [],
+  "access": "restricted",
+  "baseBranch": "main",
+  "updateInternalDependencies": "patch",
+  "ignore": []
+}

.eslintignore

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+dist/
+lib/
+node_modules/

.eslintrc.json

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+{
+  "plugins": ["jest", "@typescript-eslint"],
+  "extends": ["plugin:github/recommended"],
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": {
+    "ecmaVersion": 9,
+    "sourceType": "module",
+    "project": "./tsconfig.test.json"
+  },
+  "rules": {
+    "eslint-comments/no-use": "off",
+    "import/no-namespace": "off",
+    "no-unused-vars": "off",
+    "@typescript-eslint/no-unused-vars": "error",
+    "@typescript-eslint/explicit-member-accessibility": [
+      "error",
+      {"accessibility": "no-public"}
+    ],
+    "@typescript-eslint/no-require-imports": "error",
+    "@typescript-eslint/array-type": "error",
+    "@typescript-eslint/await-thenable": "error",
+    "@typescript-eslint/ban-ts-comment": "error",
+    "camelcase": "off",
+    "@typescript-eslint/consistent-type-assertions": "error",
+    "@typescript-eslint/explicit-function-return-type": [
+      "error",
+      {"allowExpressions": true}
+    ],
+    "@typescript-eslint/func-call-spacing": ["error", "never"],
+    "@typescript-eslint/no-array-constructor": "error",
+    "@typescript-eslint/no-empty-interface": "error",
+    "@typescript-eslint/no-explicit-any": "error",
+    "@typescript-eslint/no-extraneous-class": "error",
+    "@typescript-eslint/no-for-in-array": "error",
+    "@typescript-eslint/no-inferrable-types": "error",
+    "@typescript-eslint/no-misused-new": "error",
+    "@typescript-eslint/no-namespace": "error",
+    "@typescript-eslint/no-non-null-assertion": "warn",
+    "@typescript-eslint/no-unnecessary-qualifier": "error",
+    "@typescript-eslint/no-unnecessary-type-assertion": "error",
+    "@typescript-eslint/no-useless-constructor": "error",
+    "@typescript-eslint/no-var-requires": "error",
+    "@typescript-eslint/prefer-for-of": "warn",
+    "@typescript-eslint/prefer-function-type": "warn",
+    "@typescript-eslint/prefer-includes": "error",
+    "@typescript-eslint/prefer-string-starts-ends-with": "error",
+    "@typescript-eslint/promise-function-async": "error",
+    "@typescript-eslint/require-array-sort-compare": "error",
+    "@typescript-eslint/restrict-plus-operands": "error",
+    "semi": "off",
+    "@typescript-eslint/semi": ["error", "never"],
+    "@typescript-eslint/type-annotation-spacing": "error",
+    "@typescript-eslint/unbound-method": "error"
+  },
+  "env": {
+    "node": true,
+    "es6": true,
+    "jest/globals": true
+  }
+}

.github/dependabot.yml

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+version: 2
+updates:
+  - package-ecosystem: 'npm'
+    directory: '/'
+    schedule:
+      interval: 'daily'

.github/workflows/test.yml

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+name: 'build-test'
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+
+jobs:
+  build: # make sure build/ci work properly
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - run: |
+          yarn --frozen-lockfile
+      - run: |
+          yarn all
+  test: # make sure the action works on a clean machine without building
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - name: Ensure main exists
+        if: ${{ !endsWith( github.ref, '/main' ) }}
+        run: git fetch origin main:main
+      - uses: ./

.gitignore

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+node_modules
+lib
+.nyc
+coverage

.lintstagedrc.json

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+{
+  "*.(ts|js)": ["eslint"],
+  "*.(ts|json|yml|js|md)": ["prettier --write"]
+}

.prettierignore

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+dist
+lib
+node_modules
+.eslintignore
+.gitignore
+.prettierignore
+yarn.lock

.prettierrc.json

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+{
+  "printWidth": 80,
+  "tabWidth": 2,
+  "useTabs": false,
+  "semi": false,
+  "singleQuote": true,
+  "trailingComma": "none",
+  "bracketSpacing": false,
+  "arrowParens": "avoid"
+}

CHANGELOG.md

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+# @caff/changed-packages-github-action
+
+## 0.0.1
+
+- :tada: First version!

LICENSE

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+MIT License
+
+Copyright (c) 2020 Caff
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+# Yarn Workspace Packages
+
+> Returns the packages defined in a Yarn workspace.
+
+## About
+
+This action works with [Yarn workspaces][yarnworkspacesurl] and offers an easy way to get the list of packages defined in your workspace.
+
+## Usage
+
+```yml
+name: Get packages
+on: [push, pull_request]
+jobs:
+  get-workspace-packages:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Get packages in workspace
+        uses: caffco/yarn-workspace-pacakges-github-action@v1.0.0
+        with:
+          repository_path: .
+
+  run-tests:
+    runs-on: ubuntu-latest
+    steps:
+        - name: Print packages
+        needs: get-workspace-packages
+        run: echo ${{ needs.get-workspace-packages.outputs.package-names }}
+```
+
+[yarnworkspacesurl]: https://classic.yarnpkg.com/en/docs/workspaces/

action.yml

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+name: 'Get Yarn Workspace Packages'
+description: 'Returns packages in a Yarn workspace'
+author: 'Caff'
+branding:
+  icon: package
+  color: blue
+inputs:
+  repository_path:
+    required: true
+    description: 'Relative or absolute path to the repository. Defaults to working directory.'
+    default: '.'
+outputs:
+  package_names:
+    description: 'List of package names in the workspace'
+runs:
+  using: 'node12'
+  main: 'dist/index.js'