LaunchDarkly Find Code References in Pull Request GitHub action

Adds a comment to a pull request (PR) whenever a feature flag reference is found in a PR diff and creates a flag link in LaunchDarkly.

Permissions

This action requires a LaunchDarkly access token with:

• Read access for the designated project-key
• (Optional) the createFlagLink action, when create-flag-links input is true (default behavior)

Access tokens should be stored as an encrypted secret.

To add a comment to a PR, the repo-token used requires write permission for PRs. You can also specify permissions for the workflow with:

permissions:
  pull-requests: write

Usage

Basic:

on: pull_request

jobs:
  find-flags:
    runs-on: ubuntu-latest
    name: Find LaunchDarkly feature flags in diff
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Find flags
        uses: launchdarkly/find-code-references-in-pull-request@v2
        id: find-flags
        with:
          project-key: default
          environment-key: production
          access-token: ${{ secrets.LD_ACCESS_TOKEN }}
          repo-token: ${{ secrets.GITHUB_TOKEN }}

Use outputs in workflow:

on: pull_request

jobs:
  find-feature-flags:
    runs-on: ubuntu-latest
    name: Find LaunchDarkly feature flags in diff
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Find flags
        uses: launchdarkly/find-code-references-in-pull-request@v2
        id: find-flags
        with:
          project-key: default
          environment-key: production
          access-token: ${{ secrets.LD_ACCESS_TOKEN }}
          repo-token: ${{ secrets.GITHUB_TOKEN }}

      # Add or remove labels on PRs if any flags have changed
      - name: Add label
        if: steps.find-flags.outputs.any-changed == 'true'
        run: gh pr edit $PR_NUMBER --add-label ld-flags
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          PR_NUMBER: ${{ github.event.pull_request.number }}
      - name: Remove label
        if: steps.find-flags.outputs.any-changed == 'false'
        run: gh pr edit $PR_NUMBER --remove-label ld-flags
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          PR_NUMBER: ${{ github.event.pull_request.number }}

Flag aliases

This action has full support for code reference aliases. If the project has an existing .launchdarkly/coderefs.yaml file, it will use the aliases defined there.

You can find more information on aliases at launchdarkly/ld-find-code-refs.

Monorepos

This action does not support monorepos or searching for flags across LaunchDarkly projects.

Inputs

name	description	required	default
repo-token	Token to use to authorize comments on PR. Typically the GITHUB_TOKEN secret or equivalent github.token.	true	""
access-token	LaunchDarkly access token	true	""
project-key	LaunchDarkly project key	false	default
environment-key	LaunchDarkly environment key for creating flag links	false	production
placeholder-comment	Comment on PR when no flags are found. If flags are found in later commits, this comment will be updated.	false	false
include-archived-flags	Scan for archived flags	false	true
max-flags	Maximum number of flags to find per PR	false	5
base-uri	The base URI for the LaunchDarkly server. Most members should use the default value.	false	https://app.launchdarkly.com
check-extinctions	Check if removed flags still exist in codebase	false	true
create-flag-links	Create links to flags in LaunchDarkly. To use this feature you must use an access token with the createFlagLink role. To learn more, read Flag links.	false	true

Outputs

name	description
any-modified	Returns true if any flags have been added or modified in PR
modified-flags	Space-separated list of flags added or modified in PR
modified-flags-count	Number of flags added or modified in PR
any-removed	Returns true if any flags have been removed in PR
removed-flags	Space-separated list of flags removed in PR
removed-flags-count	Number of flags removed in PR
any-changed	Returns true if any flags have been changed in PR
changed-flags	Space-separated list of flags changed in PR
changed-flags-count	Number of flags changed in PR
any-extinct	Returns true if any flags have been removed in PR and no longer exist in codebase. Only returned if check-extinctions is true.
extinct-flags	Space-separated list of flags removed in PR and no longer exist in codebase. Only returned if check-extinctions is true.
extinct-flags-count	Number of flags removed in PR and no longer exist in codebase. Only returned if check-extinctions is true.