Init

Author: owjs3901

.gitignore

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+# dependencies (bun install)
+node_modules
+
+# output
+out
+*.tgz
+
+# code coverage
+coverage
+*.lcov
+
+# logs
+logs
+_.log
+report.[0-9]_.[0-9]_.[0-9]_.[0-9]_.json
+
+# dotenv environment variable files
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# caches
+.eslintcache
+.cache
+*.tsbuildinfo
+
+# IntelliJ based IDEs
+.idea
+
+# Finder (MacOS) folder config
+.DS_Store

.husky/pre-commit

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+#!/usr/bin/env sh
+bun run lint
+bun test --coverage

README.md

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+# Action Tools
+
+## Actions
+### Overwrite Env File
+
+This GitHub Action allows you to overwrite the contents of an environment file with the contents of another file. It is useful when you want to promote/stage environment variables from one environment to another (for example, from a `.env.development` file to a `.env.production` file) automatically in your workflows.
+
+#### Usage
+
+```yaml
+- name: Overwrite production env file with development env file
+  uses: ./action-tools/overwrite-env-file
+  with:
+    input-file: .env.development
+    output-file: .env.production
+```
+
+#### Inputs
+
+| Name         | Description                  | Required | Default             |
+|--------------|------------------------------|----------|---------------------|
+| input-file   | The file to read from        | true     | .env.development    |
+| output-file  | The file to overwrite to     | true     | .env.production     |
+
+#### Example Workflow
+
+```yaml
+name: Promote env to production
+
+on:
+  push:
+    branches: [main]
+
+jobs:
+  promote-env:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Overwrite production env file with development env file
+        uses: ./actions/overwrite-env-file
+        with:
+          input-file: .env.development
+          output-file: .env.production
+```
+

actions/collect-env/README.md

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+name: Collect Env
+description: Collect env values and write to a file
+author: JeongMin Oh
+
+branding:
+  icon: key
+  color: purple
+
+# Define your inputs here.
+inputs:
+  prefix:
+    description: The prefix to collect
+    required: false
+  output:
+    description: The file to write to
+    required: true
+  remove-prefix:
+    description: The prefix to remove
+    required: false
+    type: boolean
+    default: true
+
+runs:
+  using: node24
+  main: ./dist/index.js

actions/collect-env/action.yml

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+{
+	"name": "collect-env",
+	"version": "1.0.0",
+	"description": "Collect env values and write to a file",
+	"author": "JeongMin Oh",
+	"license": "Apache-2.0",
+	"scripts": {
+		"build": "bunx @vercel/ncc build ./src/index.ts -m -o dist"
+	},
+	"dependencies": {
+		"@actions/core": "^1.11",
+		"@actions/io": "^1.1"
+	},
+	"devDependencies": {
+		"@types/bun": "^1.3",
+		"@types/node": "^24.7",
+		"typescript": "^5.9"
+	}
+}

actions/collect-env/dist/index.js

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+import { expect, mock, test } from 'bun:test'
+
+test('should call run() when imported', async () => {
+  const originalModule = { ...(await import('../run')) }
+  const mockRun = mock(() => {})
+  mock.module('../run', () => ({
+    run: mockRun,
+  }))
+  await import('../index')
+
+  expect(mockRun).toHaveBeenCalled()
+
+  mock.module('../run', () => originalModule)
+})

actions/collect-env/package.json

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+import { expect, mock, test } from 'bun:test'
+import { writeFile } from 'node:fs/promises'
+import { getBooleanInput, getInput, setFailed } from '@actions/core'
+
+const mockWriteFile = mock(writeFile)
+const mockGetInput = mock(getInput)
+const mockSetFailed = mock(setFailed)
+const mockGetBooleanInput = mock(getBooleanInput)
+
+mock.module('node:fs/promises', () => ({
+  writeFile: mockWriteFile,
+}))
+
+mock.module('@actions/core', () => ({
+  getInput: mockGetInput,
+  setFailed: mockSetFailed,
+  getBooleanInput: mockGetBooleanInput,
+}))
+
+import { run } from '../run'
+
+test('should write filtered environment variables to file', async () => {
+  const testPrefix = 'TEST_'
+  const testOutput = 'test.env'
+
+  process.env.TEST_VAR1 = 'value1'
+  process.env.TEST_VAR2 = 'value2'
+  process.env.OTHER_VAR = 'other'
+
+  mockGetInput.mockImplementation((name: string) => {
+    switch (name as 'prefix' | 'output') {
+      case 'prefix':
+        return testPrefix
+      case 'output':
+        return testOutput
+    }
+  })
+
+  mockWriteFile.mockResolvedValue(undefined)
+  mockGetBooleanInput.mockReturnValue(false)
+
+  await run()
+
+  expect(mockGetInput).toHaveBeenCalledWith('prefix')
+  expect(mockGetInput).toHaveBeenCalledWith('output')
+  expect(mockGetBooleanInput).toHaveBeenCalledWith('remove-prefix')
+  expect(mockWriteFile).toHaveBeenCalledWith(
+    testOutput,
+    'TEST_VAR1=value1\nTEST_VAR2=value2',
+  )
+})
+
+test('should handle writeFile error', async () => {
+  const testPrefix = 'TEST_'
+  const testOutput = 'test.env'
+  const testError = 'Write failed'
+
+  process.env.TEST_VAR = 'value'
+
+  mockGetInput.mockImplementation((name: string) => {
+    switch (name as 'prefix' | 'output') {
+      case 'prefix':
+        return testPrefix
+      case 'output':
+        return testOutput
+    }
+  })
+
+  mockWriteFile.mockRejectedValue(testError)
+  mockGetBooleanInput.mockReturnValue(false)
+
+  await run()
+
+  expect(mockSetFailed).toHaveBeenCalledWith(testError)
+  process.exitCode = 0
+})
+
+test('should handle empty environment variables', async () => {
+  const testPrefix = 'NONEXISTENT_'
+  const testOutput = 'empty.env'
+
+  mockGetInput.mockImplementation((name: string) => {
+    switch (name as 'prefix' | 'output') {
+      case 'prefix':
+        return testPrefix
+      case 'output':
+        return testOutput
+    }
+  })
+
+  mockWriteFile.mockResolvedValue(undefined)
+  mockGetBooleanInput.mockReturnValue(false)
+
+  await run()
+
+  expect(mockWriteFile).toHaveBeenCalledWith(testOutput, '')
+})
+
+test('should filter environment variables by prefix', async () => {
+  const testPrefix = 'API_'
+  const testOutput = 'api.env'
+
+  process.env.API_KEY = 'secret123'
+  process.env.API_URL = 'https://api.example.com'
+  process.env.DATABASE_URL = 'postgres://localhost'
+  process.env.API_TIMEOUT = '5000'
+
+  mockGetInput.mockImplementation((name: string) => {
+    switch (name as 'prefix' | 'output') {
+      case 'prefix':
+        return testPrefix
+      case 'output':
+        return testOutput
+    }
+  })
+
+  mockWriteFile.mockResolvedValue(undefined)
+  mockGetBooleanInput.mockReturnValue(false)
+  await run()
+
+  const expectedContent = [
+    'API_KEY=secret123',
+    'API_URL=https://api.example.com',
+    'API_TIMEOUT=5000',
+  ].join('\n')
+
+  expect(mockWriteFile).toHaveBeenCalledWith(testOutput, expectedContent)
+})
+
+test('should remove prefix from environment variables', async () => {
+  const testPrefix = 'API_'
+  const testOutput = 'api.env'
+  const testRemovePrefix = true
+  process.env.API_KEY = 'secret123'
+  process.env.API_URL = 'https://api.example.com'
+  process.env.API_TIMEOUT = '5000'
+
+  mockGetInput.mockImplementation((name: string) => {
+    switch (name as 'prefix' | 'output') {
+      case 'prefix':
+        return testPrefix
+      case 'output':
+        return testOutput
+    }
+  })
+
+  mockWriteFile.mockResolvedValue(undefined)
+  mockGetBooleanInput.mockReturnValue(testRemovePrefix)
+
+  await run()
+
+  const expectedContent = [
+    'KEY=secret123',
+    'URL=https://api.example.com',
+    'TIMEOUT=5000',
+  ].join('\n')
+
+  expect(mockWriteFile).toHaveBeenCalledWith(testOutput, expectedContent)
+})

actions/collect-env/src/__tests__/index.test.ts

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+import { run } from './run'
+
+run()