26 changed files with 113 additions and 89630 deletions
--- a/.editorconfig
+++ b/.editorconfig
@ -1,10 +1,15 @@
-# https://editorconfig.org
+# EditorConfig helps developers define and maintain consistent
+# coding styles between different editors and IDEs
+# editorconfig.org
+
 root = true

 [*]
-indent_style = space
-indent_size = 2
-end_of_line = lf
 charset = utf-8
-trim_trailing_whitespace = true
+end_of_line = lf
 insert_final_newline = true
+trim_trailing_whitespace = true
+indent_style = space
+
+[*.{yml,yaml}]
+indent_size = 2
--- a/.envrc
+++ b/.envrc
@ -1 +0,0 @@
-use flake
--- a/.eslintrc.json
+++ b/.eslintrc.json
@ -1,74 +0,0 @@
-{
-  "plugins": ["@typescript-eslint"],
-  "extends": ["plugin:github/recommended"],
-  "parser": "@typescript-eslint/parser",
-  "parserOptions": {
-    "ecmaVersion": 9,
-    "sourceType": "module",
-    "project": "./tsconfig.json"
-  },
-  "settings": {
-    "import/resolver": {
-      "typescript": {}
-    }
-  },
-  "rules": {
-    "i18n-text/no-en": "off",
-    "eslint-comments/no-use": "off",
-    "import/no-namespace": "off",
-    "no-unused-vars": "off",
-    "@typescript-eslint/no-unused-vars": [
-      "error",
-      {
-        "argsIgnorePattern": "^_"
-      }
-    ],
-    "@typescript-eslint/explicit-member-accessibility": [
-      "error",
-      {
-        "accessibility": "no-public"
-      }
-    ],
-    "@typescript-eslint/no-base-to-string": "error",
-    "@typescript-eslint/no-require-imports": "error",
-    "@typescript-eslint/array-type": "error",
-    "@typescript-eslint/await-thenable": "error",
-    "@typescript-eslint/ban-ts-comment": "error",
-    "camelcase": "error",
-    "@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-floating-promises": "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",
-    "@typescript-eslint/type-annotation-spacing": "error",
-    "@typescript-eslint/unbound-method": "error"
-  },
-  "env": {
-    "node": true,
-    "es6": true
-  }
-}
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@ -1,6 +0,0 @@
-version: 2
-updates:
-  - package-ecosystem: "github-actions"
-    directory: "/"
-    schedule:
-      interval: "daily"
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@ -1,33 +0,0 @@
-name: CI
-on:
-  pull_request:
-  push:
-    branches: [main]
-
-jobs:
-  typescript-action:
-    runs-on: ubuntu-22.04
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
-      - name: Install Nix
-        uses: DeterminateSystems/nix-installer-action@main
-      - name: Enable magic Nix cache
-        uses: DeterminateSystems/magic-nix-cache-action@main
-      - name: Install pnpm dependencies
-        run: nix develop --command pnpm install
-      - name: Check formatting
-        run: nix develop --command pnpm run check-fmt
-      - name: Lint
-        run: nix develop --command pnpm run lint
-      - name: Build
-        run: nix develop --command pnpm run build
-      - name: Run test suite
-        run: nix develop --command pnpm run test
-      - name: Package
-        run: nix develop --command pnpm run package
-      - name: Check git status
-        run: git status --porcelain=v1
-      - name: Ensure no staged changes
-        run: git diff --exit-code
--- a/.github/workflows/update.yml
+++ b/.github/workflows/update.yml
@ -1,22 +0,0 @@
-name: update-flake-lock
-on:
-  workflow_dispatch:
-  schedule:
-    - cron: "0 0 * * 0"
-
-jobs:
-  lockfile:
-    runs-on: ubuntu-22.04
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Install Nix
-        uses: DeterminateSystems/nix-installer-action@main
-      - name: Enable magic Nix cache
-        uses: DeterminateSystems/magic-nix-cache-action@main
-      - name: Check flake
-        uses: DeterminateSystems/flake-checker-action@main
-      - name: Update flake.lock
-        uses: ./.
-        with:
-          _internal-strict-mode: true
--- a/.github/workflows/validate.yml
+++ b/.github/workflows/validate.yml
@ -6,13 +6,13 @@ on:

 jobs:
  validate:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-latest
    steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v2
        with:
          fetch-depth: 0
      - name: Validate YAML
-        uses: nwisbeta/validate-yaml-schema@v2.0.0
+        uses: nwisbeta/validate-yaml-schema@v1.0.3
        with:
          yamlSchemasJson: |
            {
--- a/.gitignore
+++ b/.gitignore
@ -1,2 +0,0 @@
-# JS dependencies
-node_modules/
--- a/.prettierignore
+++ b/.prettierignore
@ -1,5 +0,0 @@
-dist/
-lib/
-node_modules/
-pnpm-lock.yaml
-README.md
--- a/README.md
+++ b/README.md
@ -20,11 +20,14 @@ jobs:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v2
      - name: Install Nix
-        uses: DeterminateSystems/nix-installer-action@main
+        uses: cachix/install-nix-action@v16
+        with:
+          extra_nix_config: |
+            access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
      - name: Update flake.lock
-        uses: DeterminateSystems/update-flake-lock@main
+        uses: DeterminateSystems/update-flake-lock@vX
        with:
          pr-title: "Update flake.lock" # Title of PR to be created
          pr-labels: |                  # Labels to be set on the PR
@ -50,122 +53,18 @@ jobs:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v2
      - name: Install Nix
-        uses: DeterminateSystems/nix-installer-action@v1
+        uses: cachix/install-nix-action@v16
+        with:
+          extra_nix_config: |
+            access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
      - name: Update flake.lock
        uses: DeterminateSystems/update-flake-lock@vX
        with:
          inputs: input1 input2 input3
 ```

-## Example adding options to nix command
-
-It is also possible to use specific options to the nix command in a space separated list:
-
-```yaml
-name: update-flake-lock
-on:
-  workflow_dispatch: # allows manual triggering
-  schedule:
-    - cron: '0 0 * * 0' # runs weekly on Sunday at 00:00
-
-jobs:
-  lockfile:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-      - name: Install Nix
-        uses: DeterminateSystems/nix-installer-action@v1
-      - name: Update flake.lock
-        uses: DeterminateSystems/update-flake-lock@vX
-        with:
-          nix-options: --debug --log-format raw
-```
-
-## Example that prints the number of the created PR
-
-```yaml
-name: update-flake-lock
-on:
-  workflow_dispatch: # allows manual triggering
-  schedule:
-    - cron: '0 0 * * 0' # runs weekly on Sunday at 00:00
-
-jobs:
-  lockfile:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-      - name: Install Nix
-        uses: DeterminateSystems/nix-installer-action@v1
-      - name: Update flake.lock
-        id: update
-        uses: DeterminateSystems/update-flake-lock@vX
-        with:
-          inputs: input1 input2 input3
-      - name: Print PR number
-        run: echo Pull request number is ${{ steps.update.outputs.pull-request-number }}.
-```
-
-## Example that doesn't run on PRs
-
-If you were to run this action as a part of your CI workflow, you may want to prevent it from running against Pull Requests.
-
-```yaml
-name: update-flake-lock
-on:
-  workflow_dispatch: # allows manual triggering
-  pull_request: # triggers on every Pull Request
-  schedule:
-    - cron: '0 0 * * 0' # runs weekly on Sunday at 00:00
-
-jobs:
-  lockfile:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-      - name: Install Nix
-        uses: DeterminateSystems/nix-installer-action@v1
-      - name: Update flake.lock
-        if: ${{ github.event_name != 'pull_request' }}
-        uses: DeterminateSystems/update-flake-lock@vX
-        with:
-          inputs: input1 input2 input3
-          path-to-flake-dir: 'nix/' # in this example our flake doesn't sit at the root of the repository, it sits under 'nix/flake.nix'
-```
-
-## Example using a different Git user
-
-If you want to change the author and / or committer of the flake.lock update commit, you can tweak the `git-{author,committer}-{name,email}` options:
-
-```yaml
-name: update-flake-lock
-on:
-  workflow_dispatch: # allows manual triggering
-  schedule:
-    - cron: '0 0 * * 0' # runs weekly on Sunday at 00:00
-
-jobs:
-  lockfile:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-      - name: Install Nix
-        uses: DeterminateSystems/nix-installer-action@v1
-      - name: Update flake.lock
-        uses: DeterminateSystems/update-flake-lock@vX
-        with:
-          git-author-name: 'Jane Author'
-          git-author-email: 'github-actions[bot]@users.noreply.github.com'
-          git-committer-name: 'John Committer'
-          git-committer-email: 'github-actions[bot]@users.noreply.github.com'
-```
-
 ## Running GitHub Actions CI

 GitHub Actions will not run workflows when a branch is pushed by or a PR is opened by a GitHub Action. There are two ways to have GitHub Actions CI run on a PR submitted by this action.
@ -185,7 +84,7 @@ git push origin update_flake_lock_action --force
 ### With a Personal Authentication Token

 By providing a Personal Authentication Token, the PR will be submitted in a way that bypasses this limitation (GitHub will essentially think it is the owner of the PAT submitting the PR, and not an Action).
-You can create a token by visiting https://github.com/settings/tokens and select at least the `repo` scope. For the new fine-grained tokens, you need to enable read and write access for "Contents" and "Pull Requests" permissions. Then, store this token in your repository secrets (i.e. `https://github.com/<USER>/<REPO>/settings/secrets/actions`) as `GH_TOKEN_FOR_UPDATES` and set up your workflow file like the following:
+You can create a token by visiting https://github.com/settings/tokens and select at least the `repo` scope. Then, store this token in your repository secrets (i.e. 'https://github.com/<USER>/<REPO>/settings/secrets/actions') as `GH_TOKEN_FOR_UPDATES` and set up your workflow file like the following:

 ```yaml
 name: update-flake-lock
@ -199,113 +98,15 @@ jobs:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v2
      - name: Install Nix
-        uses: DeterminateSystems/nix-installer-action@v1
+        uses: cachix/install-nix-action@v16
      - name: Update flake.lock
        uses: DeterminateSystems/update-flake-lock@vX
        with:
          token: ${{ secrets.GH_TOKEN_FOR_UPDATES }}
 ```

-## With GPG commit signing
-
-It's possible for the bot to produce GPG signed commits. Associating a GPG public key to a github user account is not required but it is necessary if you want the signed commits to appear as verified in Github. This can be a compliance requirement in some cases.
-
-You can follow [Github's guide on creating and/or adding a new GPG key to an user account](https://docs.github.com/en/authentication/managing-commit-signature-verification/adding-a-new-gpg-key-to-your-github-account). Using a specific github user account for the bot can be a good security measure to dissociate this bot's actions and commits from your personal github account.
-
-For the bot to produce signed commits, you will have to provide the GPG private keys to this action's input parameters. You can safely do that with [Github secrets as explained here](https://github.com/crazy-max/ghaction-import-gpg#prerequisites).
-
-When using commit signing, the commit author name and email for the commits produced by this bot would correspond to the ones associated to the GPG Public Key.
-
-If you want to sign using a subkey, you must specify the subkey fingerprint using the `gpg-fingerprint` input parameter.
-
-You can find an example of how to using this action with commit signing below:
-
-```yaml
-name: update-flake-lock
-on:
-  workflow_dispatch: # allows manual triggering
-  schedule:
-    - cron: '0 0 * * 1,4' # Run twice a week
-
-jobs:
-  lockfile:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-      - name: Install Nix
-        uses: DeterminateSystems/nix-installer-action@v1
-      - name: Update flake.lock
-        uses: DeterminateSystems/update-flake-lock@vX
-        with:
-          sign-commits: true
-          gpg-private-key: ${{ secrets.GPG_PRIVATE_KEY }}
-          gpg-fingerprint: ${{ secrets.GPG_FINGERPRINT }} # specify subkey fingerprint (optional)
-          gpg-passphrase: ${{ secrets.GPG_PASSPHRASE }}
-```
-
-## Custom PR Body
-
-By default the generated PR body is set to be the following template:
-
-````handlebars
-Automated changes by the [update-flake-lock](https://github.com/DeterminateSystems/update-flake-lock) GitHub Action.
-
-```
-{{ env.GIT_COMMIT_MESSAGE }}
-```
-
-### Running GitHub Actions on this PR
-
-GitHub Actions will not run workflows on pull requests which are opened by a GitHub Action.
-
-To run GitHub Actions workflows on this PR, run:
-
-```sh
-git branch -D update_flake_lock_action
-git fetch origin
-git checkout update_flake_lock_action
-git commit --amend --no-edit
-git push origin update_flake_lock_action --force
-```
-````
-
-However you can customize it, with variable interpolation performed with [Handlebars](https://handlebarsjs.com/). This allows you to customize the template with the following variables:
- env.GIT_AUTHOR_NAME
- env.GIT_AUTHOR_EMAIL
- env.GIT_COMMITTER_NAME
- env.GIT_COMMITTER_EMAIL
- env.GIT_COMMIT_MESSAGE
-
-## Add assignees or reviewers
-
-You can assign the PR to or request a review from one or more GitHub users with `pr-assignees` and `pr-reviewers`, respectively.
-These properties expect a comma or newline separated list of GitHub usernames:
-
-```yaml
-name: update-flake-lock
-on:
-  workflow_dispatch: # allows manual triggering
-  schedule:
-    - cron: '0 0 * * 1,4' # Run twice a week
-
-jobs:
-  lockfile:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-      - name: Install Nix
-        uses: DeterminateSystems/nix-installer-action@v1
-      - name: Update flake.lock
-        uses: DeterminateSystems/update-flake-lock@vX
-        with:
-          pr-assignees: SomeGitHubUsername
-          pr-reviewers: SomeOtherGitHubUsername,SomeThirdGitHubUsername
-```
-
 ## Contributing

 Feel free to send a PR or open an issue if you find something functions unexpectedly! Please make sure to test your changes and update any related documentation before submitting your PR.
--- a/action.yml
+++ b/action.yml
@ -1,226 +1,78 @@
-name: "Update Nix Flake Lock"
-description: "Update your Nix flake.lock and send a PR"
+name: 'Update flake.lock'
+description: 'Update your flake.lock and send a PR'
 inputs:
  inputs:
-    description: "A space-separated list of inputs to update. Leave empty to update all inputs."
+    description: 'A space-separated list of inputs to update. Leave empty to update all inputs.'
    required: false
-    default: ""
+    default: ''
  token:
-    description: "GITHUB_TOKEN or a `repo` scoped Personal Access Token (PAT)"
+    description: 'GITHUB_TOKEN or a `repo` scoped Personal Access Token (PAT)'
    required: false
    default: ${{ github.token }}
  commit-msg:
-    description: "The message provided with the commit"
+    description: 'The message provided with the commit'
    required: false
    default: "flake.lock: Update"
-  base:
-    description: "Sets the pull request base branch. Defaults to the branch checked out in the workflow."
-    required: false
-  branch:
-    description: "The branch of the PR to be created"
-    required: false
-    default: "update_flake_lock_action"
-  path-to-flake-dir:
-    description: "The path of the directory containing `flake.nix` file within your repository. Useful when `flake.nix` cannot reside at the root of your repository."
-    required: false
  pr-title:
-    description: "The title of the PR to be created"
+    description: 'The title of the PR to be created'
    required: false
    default: "flake.lock: Update"
-  pr-body:
-    description: "The body of the PR to be created"
-    required: false
-    default: |
-      Automated changes by the [update-flake-lock](https://github.com/DeterminateSystems/update-flake-lock) GitHub Action.
-
-      ```
-      {{ env.GIT_COMMIT_MESSAGE }}
-      ```
-
-      ### Running GitHub Actions on this PR
-
-      GitHub Actions will not run workflows on pull requests which are opened by a GitHub Action.
-
-      To run GitHub Actions workflows on this PR, run:
-
-      ```sh
-      git branch -D update_flake_lock_action
-      git fetch origin
-      git checkout update_flake_lock_action
-      git commit --amend --no-edit
-      git push origin update_flake_lock_action --force
-      ```
-
  pr-labels:
-    description: "A comma or newline separated list of labels to set on the Pull Request to be created"
+    description: 'A comma or newline separated list of labels to set on the Pull Request to be created'
    required: false
-    default: ""
-  pr-assignees:
-    description: "A comma or newline separated list of assignees (GitHub usernames)."
-    required: false
-    default: ""
-  pr-reviewers:
-    description: "A comma or newline separated list of reviewers (GitHub usernames) to request a review from."
-    required: false
-    default: ""
-  git-author-name:
-    description: "Author name used for commit. Only used if sign-commits is false."
-    required: false
-    default: "github-actions[bot]"
-  git-author-email:
-    description: "Author email used for commit. Only used if sign-commits is false."
-    required: false
-    default: "github-actions[bot]@users.noreply.github.com"
-  git-committer-name:
-    description: "Committer name used for commit. Only used if sign-commits is false."
-    required: false
-    default: "github-actions[bot]"
-  git-committer-email:
-    description: "Committer email used for commit. Only used if sign-commits is false."
-    required: false
-    default: "github-actions[bot]@users.noreply.github.com"
-  sign-commits:
-    description: "Set to true if the action should sign the commit with GPG"
-    required: false
-    default: "false"
-  gpg-private-key:
-    description: "GPG Private Key with which to sign the commits in the PR to be created"
-    required: false
-    default: ""
-  gpg-fingerprint:
-    description: "Fingerprint of specific GPG subkey to use"
-    required: false
-  gpg-passphrase:
-    description: "GPG Private Key Passphrase for the GPG Private Key with which to sign the commits in the PR to be created"
-    required: false
-    default: ""
-  nix-options:
-    description: "A space-separated list of options to pass to the nix command"
-    required: false
-    default: ""
-  _internal-strict-mode:
-    description: Whether to fail when any errors are thrown. Used only to test the Action; do not set this in your own workflows.
-    required: false
-    default: false
-outputs:
-  pull-request-number:
-    description: "The number of the opened pull request"
-    value: ${{ steps.create-pr.outputs.pull-request-number }}
-  pull-request-url:
-    description: "The The URL of the opened pull request."
-    value: ${{ steps.create-pr.outputs.pull-request-url }}
-  pull-request-operation:
-    description: "The pull request operation performed by the action, `created`, `updated` or `closed`."
-    value: ${{ steps.create-pr.outputs.pull-request-operation }}
+    default: ''
 runs:
  using: "composite"
  steps:
-    - name: Import bot's GPG key for signing commits
-      if: ${{ inputs.sign-commits == 'true' }}
-      id: import-gpg
-      uses: crazy-max/ghaction-import-gpg@01dd5d3ca463c7f10f7f4f7b4f177225ac661ee4 # v6.1.0
-      with:
-        gpg_private_key: ${{ inputs.gpg-private-key }}
-        fingerprint: ${{ inputs.gpg-fingerprint }}
-        passphrase: ${{ inputs.gpg-passphrase }}
-        git_config_global: true
-        git_user_signingkey: true
-        git_commit_gpgsign: true
-    - name: Set environment variables (signed commits)
-      if: ${{ inputs.sign-commits == 'true' }}
+    - run: |
+        if [[ -n '${{ inputs.inputs }}' ]]; then
+          inputs=()
+          for input in ${{ inputs.inputs }}; do
+            inputs+=("--update-input" "$input")
+          done
+          nix flake lock "${inputs[@]}" --commit-lock-file --commit-lockfile-summary "${{ inputs.commit-msg }}"
+        else
+          nix flake update --commit-lock-file --commit-lockfile-summary "${{ inputs.commit-msg }}"
+        fi
      shell: bash
      env:
-        GIT_AUTHOR_NAME: ${{ steps.import-gpg.outputs.name }}
-        GIT_AUTHOR_EMAIL: ${{ steps.import-gpg.outputs.email }}
-        GIT_COMMITTER_NAME: ${{ steps.import-gpg.outputs.name }}
-        GIT_COMMITTER_EMAIL: ${{ steps.import-gpg.outputs.email }}
-        TARGETS: ${{ inputs.inputs }}
-      run: |
-        echo "GIT_AUTHOR_NAME=$GIT_AUTHOR_NAME" >> $GITHUB_ENV
-        echo "GIT_AUTHOR_EMAIL=<$GIT_AUTHOR_EMAIL>" >> $GITHUB_ENV
-        echo "GIT_COMMITTER_NAME=$GIT_COMMITTER_NAME" >> $GITHUB_ENV
-        echo "GIT_COMMITTER_EMAIL=<$GIT_COMMITTER_EMAIL>" >> $GITHUB_ENV
-    - name: Set environment variables (unsigned commits)
-      if: ${{ inputs.sign-commits != 'true' }}
+        GIT_AUTHOR_NAME: github-actions[bot]
+        GIT_AUTHOR_EMAIL: <github-actions[bot]@users.noreply.github.com>
+        GIT_COMMITTER_NAME: github-actions[bot]
+        GIT_COMMITTER_EMAIL: <github-actions[bot]@users.noreply.github.com>
+    - run: |
+        content="$(git log --format=%b -n 1)"
+        content="${content//'%'/'%25'}"
+        content="${content//$'\n'/'%0A'}"
+        content="${content//$'\r'/'%0D'}"
+        echo "::set-output name=msg::$content"
      shell: bash
-      run: |
-        echo "GIT_AUTHOR_NAME=${{ inputs.git-author-name }}" >> $GITHUB_ENV
-        echo "GIT_AUTHOR_EMAIL=<${{ inputs.git-author-email }}>" >> $GITHUB_ENV
-        echo "GIT_COMMITTER_NAME=${{ inputs.git-committer-name }}" >> $GITHUB_ENV
-        echo "GIT_COMMITTER_EMAIL=<${{ inputs.git-committer-email }}>" >> $GITHUB_ENV
-    - name: Run update-flake-lock
-      shell: bash
-      run: node "$GITHUB_ACTION_PATH/dist/index.js"
-      env:
-        # The following manually exposes all of the action inputs into INPUT_ environment variables so actionsCore.getInput works:
-        # https://github.com/actions/toolkit/blob/ae38557bb0dba824cdda26ce787bd6b66cf07a83/packages/core/src/core.ts#L126
-        INPUT_BASE: ${{ inputs.base }}
-        INPUT_BRANCH: ${{ inputs.branch }}
-        INPUT_COMMIT-MSG: ${{ inputs.commit-msg }}
-        INPUT_GIT-AUTHOR-EMAIL: ${{ inputs.git-author-email }}
-        INPUT_GIT-AUTHOR-NAME: ${{ inputs.git-author-name }}
-        INPUT_GIT-COMMITTER-EMAIL: ${{ inputs.git-committer-email }}
-        INPUT_GIT-COMMITTER-NAME: ${{ inputs.git-committer-name }}
-        INPUT_GPG-FINGERPRINT: ${{ inputs.gpg-fingerprint }}
-        INPUT_GPG-PASSPHRASE: ${{ inputs.gpg-passphrase }}
-        INPUT_GPG-PRIVATE-KEY: ${{ inputs.gpg-private-key }}
-        INPUT_INPUTS: ${{ inputs.inputs }}
-        INPUT_NIX-OPTIONS: ${{ inputs.nix-options }}
-        INPUT_PATH-TO-FLAKE-DIR: ${{ inputs.path-to-flake-dir }}
-        INPUT_PR-ASSIGNEES: ${{ inputs.pr-assignees }}
-        INPUT_PR-BODY: ${{ inputs.pr-body }}
-        INPUT_PR-LABELS: ${{ inputs.pr-labels }}
-        INPUT_PR-REVIEWERS: ${{ inputs.pr-reviewers }}
-        INPUT_PR-TITLE: ${{ inputs.pr-title }}
-        INPUT_PULL-REQUEST-NUMBER: ${{ inputs.pull-request-number }}
-        INPUT_PULL-REQUEST-OPERATION: ${{ inputs.pull-request-operation }}
-        INPUT_SIGN-COMMITS: ${{ inputs.sign-commits }}
-        INPUT_TOKEN: ${{ inputs.token }}
-        INPUT__INTERNAL-STRICT-MODE: ${{ inputs._internal-strict-mode }}
-    - name: Save PR Body as file
-      uses: DamianReeves/write-file-action@v1.3
-      with:
-        path: pr_body.template
-        contents: ${{ inputs.pr-body }}
-      env: {}
-    - name: Set additional env variables (GIT_COMMIT_MESSAGE)
-      shell: bash
-      run: |
-        DELIMITER=$(dd if=/dev/urandom bs=15 count=1 status=none | base64)
-        COMMIT_MESSAGE="$(git log --format=%b -n 1)"
-        echo "GIT_COMMIT_MESSAGE<<$DELIMITER" >> $GITHUB_ENV
-        echo "$COMMIT_MESSAGE" >> $GITHUB_ENV
-        echo "$DELIMITER" >> $GITHUB_ENV
-        echo "GIT_COMMIT_MESSAGE is: ${COMMIT_MESSAGE}"
-    - name: Interpolate PR Body
-      uses: pedrolamas/handlebars-action@2995d7eadacbc8f2f6ab8431a01d84a5fa3b8bb4 # v2.4.0
-      with:
-        files: "pr_body.template"
-        output-filename: "pr_body.txt"
-    - name: Read pr_body.txt
-      id: pr_body
-      uses: juliangruber/read-file-action@v1
-      with:
-        path: "pr_body.txt"
-    # We need to remove the pr_body files so that the
-    # peter-evans/create-pull-request action does not commit it (the
-    # action commits all new and modified files).
-    - name: Remove PR body template files
-      shell: bash
-      run: rm -f pr_body.txt pr_body.template
+      id: commit_message
    - name: Create PR
-      id: create-pr
-      # uses: peter-evans/create-pull-request@main
-      uses: peter-evans/create-pull-request@v6.0.1
+      uses: peter-evans/create-pull-request@v3
      with:
-        base: "${{ inputs.base }}"
-        branch: "${{ inputs.branch }}"
+        branch: update_flake_lock_action
        delete-branch: true
-        committer: "${{ env.GIT_COMMITTER_NAME }} ${{ env.GIT_COMMITTER_EMAIL }}"
-        author: "${{ env.GIT_AUTHOR_NAME }} ${{ env.GIT_AUTHOR_EMAIL }}"
-        title: "${{ inputs.pr-title }}"
-        token: "${{ inputs.token }}"
-        assignees: "${{ inputs.pr-assignees }}"
-        labels: "${{ inputs.pr-labels }}"
-        reviewers: "${{ inputs.pr-reviewers }}"
-        body: "${{ steps.pr_body.outputs.content }}"
+        title: ${{ inputs.pr-title }}
+        token: ${{ inputs.token }}
+        labels: ${{ inputs.pr-labels }}
+        body: |
+          Automated changes by the [update-flake-lock](https://github.com/DeterminateSystems/update-flake-lock) GitHub Action.
+
+          ```
+          ${{ steps.commit_message.outputs.msg }}
+          ```
+
+          ### Running GitHub Actions on this PR
+
+          GitHub Actions will not run workflows on pull requests which are opened by a GitHub Action.
+
+          To run GitHub Actions workflows on this PR, run:
+
+          ```sh
+          git branch -D update_flake_lock_action
+          git fetch origin
+          git checkout update_flake_lock_action
+          git commit --amend --no-edit
+          git push origin update_flake_lock_action --force
+          ```
--- a/dist/index.d.ts
+++ b/dist/index.d.ts
@ -1,2 +0,0 @@
-
-export {  }
--- a/dist/index.js
+++ b/dist/index.js
--- a/dist/index.js.map
+++ b/dist/index.js.map
--- a/dist/package.json
+++ b/dist/package.json
@ -1,3 +0,0 @@
-{
-  "type": "module"
-}
--- a/flake.lock
+++ b/flake.lock
@ -2,16 +2,18 @@
  "nodes": {
    "nixpkgs": {
      "locked": {
-        "lastModified": 1713537308,
-        "narHash": "sha256-XtTSSIB2DA6tOv+l0FhvfDMiyCmhoRbNB+0SeInZkbk=",
-        "rev": "5c24cf2f0a12ad855f444c30b2421d044120c66f",
-        "revCount": 614481,
-        "type": "tarball",
-        "url": "https://api.flakehub.com/f/pinned/NixOS/nixpkgs/0.1.614481%2Brev-5c24cf2f0a12ad855f444c30b2421d044120c66f/018efa00-a443-7f41-b371-ce568b5c7e9f/source.tar.gz"
+        "lastModified": 1638263381,
+        "narHash": "sha256-1rZDxTw74ETuJEjwPfpMgY0sfx8Cv1tRNt3gibol574=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "7b031d0d99e8cdaf0b70457c0cb33f16c0c958bb",
+        "type": "github"
      },
      "original": {
-        "type": "tarball",
-        "url": "https://flakehub.com/f/NixOS/nixpkgs/0.1.%2A.tar.gz"
+        "owner": "nixos",
+        "ref": "nixos-unstable-small",
+        "repo": "nixpkgs",
+        "type": "github"
      }
    },
    "root": {
--- a/flake.nix
+++ b/flake.nix
@ -1,23 +1,30 @@
 {
  description = "update-flake-lock";

-  inputs.nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/0.1.*.tar.gz";
+  inputs.nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";

-  outputs = { self, nixpkgs }:
+  outputs =
+    { self
+    , nixpkgs
+    }:
    let
-      supportedSystems = [ "x86_64-linux" "aarch64-darwin" "aarch64-linux" "x86_64-darwin" ];
-      forEachSupportedSystem = f: nixpkgs.lib.genAttrs supportedSystems (system: f {
-        pkgs = import nixpkgs { inherit system; };
-      });
+      nameValuePair = name: value: { inherit name value; };
+      genAttrs = names: f: builtins.listToAttrs (map (n: nameValuePair n (f n)) names);
+
+      allSystems = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
+      forAllSystems = f: genAttrs allSystems
+        (system: f {
+          inherit system;
+          pkgs = import nixpkgs { inherit system; };
+        });
    in
    {
-      devShells = forEachSupportedSystem ({ pkgs }: {
-        default = pkgs.mkShell {
-          packages = with pkgs; [
-            nodejs_latest
-            nodePackages_latest.pnpm
-          ];
-        };
-      });
+      devShell = forAllSystems
+        ({ system, pkgs, ... }:
+          pkgs.stdenv.mkDerivation {
+            name = "update-flake-lock-devshell";
+            buildInputs = [ pkgs.shellcheck ];
+            src = self;
+          });
    };
 }
--- a/package.json
+++ b/package.json
@ -1,47 +0,0 @@
-{
-  "name": "update-flake-lock",
-  "version": "1.0.0",
-  "description": "",
-  "main": "./dist/index.js",
-  "types": "./dist/index.d.ts",
-  "type": "module",
-  "scripts": {
-    "build": "tsup",
-    "format": "prettier --write .",
-    "check-fmt": "prettier --check .",
-    "lint": "eslint src/**/*.ts --ignore-pattern *.test.ts",
-    "package": "ncc build",
-    "test": "vitest --watch false",
-    "all": "pnpm run format && pnpm run lint && pnpm run build && pnpm run package"
-  },
-  "repository": {
-    "type": "git",
-    "url": "git+https://github.com/DeterminateSystems/update-flake-lock.git"
-  },
-  "keywords": [],
-  "author": "",
-  "license": "MIT",
-  "bugs": {
-    "url": "https://github.com/DeterminateSystems/update-flake-lock/issues"
-  },
-  "homepage": "https://github.com/DeterminateSystems/update-flake-lock#readme",
-  "dependencies": {
-    "@actions/core": "^1.11.1",
-    "@actions/exec": "^1.1.1",
-    "detsys-ts": "github:DeterminateSystems/detsys-ts"
-  },
-  "devDependencies": {
-    "@trivago/prettier-plugin-sort-imports": "^4.3.0",
-    "@typescript-eslint/eslint-plugin": "^7.18.0",
-    "@vercel/ncc": "^0.38.3",
-    "eslint": "^8.57.1",
-    "eslint-import-resolver-typescript": "^3.6.3",
-    "eslint-plugin-github": "^4.10.2",
-    "eslint-plugin-import": "^2.31.0",
-    "eslint-plugin-prettier": "^5.2.1",
-    "prettier": "^3.3.3",
-    "tsup": "^8.3.5",
-    "typescript": "^5.6.3",
-    "vitest": "^1.6.0"
-  }
-}
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
--- a/prettier.config.cjs
+++ b/prettier.config.cjs
@ -1,12 +0,0 @@
-/** @type {import('prettier').Config} */
-module.exports = {
-  plugins: [require.resolve("@trivago/prettier-plugin-sort-imports")],
-  semi: true,
-  singleQuote: false,
-  tabWidth: 2,
-  trailingComma: "all",
-  useTabs: false,
-  // Import sorting
-  importOrderSeparation: true,
-  importOrderSortSpecifiers: true,
-};
--- a/src/index.ts
+++ b/src/index.ts
@ -1,76 +0,0 @@
-import { makeNixCommandArgs } from "./nix.js";
-import * as actionsCore from "@actions/core";
-import * as actionsExec from "@actions/exec";
-import { DetSysAction, inputs } from "detsys-ts";
-
-const EVENT_EXECUTION_FAILURE = "execution_failure";
-
-class UpdateFlakeLockAction extends DetSysAction {
-  private commitMessage: string;
-  private nixOptions: string[];
-  private flakeInputs: string[];
-  private pathToFlakeDir: string | null;
-
-  constructor() {
-    super({
-      name: "update-flake-lock",
-      fetchStyle: "universal",
-      requireNix: "fail",
-    });
-
-    this.commitMessage = inputs.getString("commit-msg");
-    this.flakeInputs = inputs.getArrayOfStrings("inputs", "space");
-    this.nixOptions = inputs.getArrayOfStrings("nix-options", "space");
-    this.pathToFlakeDir = inputs.getStringOrNull("path-to-flake-dir");
-  }
-
-  async main(): Promise<void> {
-    await this.update();
-  }
-
-  // No post phase
-  async post(): Promise<void> {}
-
-  async update(): Promise<void> {
-    // Nix command of this form:
-    // nix ${maybe nix options} flake ${"update" or "lock"} ${maybe --update-input flags} --commit-lock-file --commit-lockfile-summary ${commit message}
-    // Example commands:
-    // nix --extra-substituters https://example.com flake lock --update-input nixpkgs --commit-lock-file --commit-lockfile-summary "updated flake.lock"
-    // nix flake update --commit-lock-file --commit-lockfile-summary "updated flake.lock"
-    const nixCommandArgs: string[] = makeNixCommandArgs(
-      this.nixOptions,
-      this.flakeInputs,
-      this.commitMessage,
-    );
-
-    actionsCore.debug(
-      JSON.stringify({
-        options: this.nixOptions,
-        inputs: this.flakeInputs,
-        message: this.commitMessage,
-        args: nixCommandArgs,
-      }),
-    );
-
-    const execOptions: actionsExec.ExecOptions = {
-      cwd: this.pathToFlakeDir !== null ? this.pathToFlakeDir : undefined,
-    };
-
-    const exitCode = await actionsExec.exec("nix", nixCommandArgs, execOptions);
-
-    if (exitCode !== 0) {
-      this.recordEvent(EVENT_EXECUTION_FAILURE, {
-        exitCode,
-      });
-      actionsCore.setFailed(`non-zero exit code of ${exitCode} detected`);
-    } else {
-      actionsCore.info(`flake.lock file was successfully updated`);
-    }
-  }
-}
-
-function main(): void {
-  new UpdateFlakeLockAction().execute();
-}
-
-main();
--- a/src/nix.test.ts
+++ b/src/nix.test.ts
@ -1,77 +0,0 @@
-import { makeNixCommandArgs } from "./nix.js";
-import { expect, test } from "vitest";
-
-type TestCase = {
-  inputs: {
-    nixOptions: string[];
-    flakeInputs: string[];
-    commitMessage: string;
-  };
-  expected: string[];
-};
-
-test("Nix command arguments", () => {
-  const testCases: TestCase[] = [
-    {
-      inputs: {
-        nixOptions: ["--log-format", "raw"],
-        flakeInputs: [],
-        commitMessage: "just testing",
-      },
-      expected: [
-        "--log-format",
-        "raw",
-        "flake",
-        "update",
-        "--commit-lock-file",
-        "--option",
-        "commit-lockfile-summary",
-        "just testing",
-      ],
-    },
-    {
-      inputs: {
-        nixOptions: [],
-        flakeInputs: ["nixpkgs", "rust-overlay"],
-        commitMessage: "just testing",
-      },
-      expected: [
-        "flake",
-        "lock",
-        "--update-input",
-        "nixpkgs",
-        "--update-input",
-        "rust-overlay",
-        "--commit-lock-file",
-        "--option",
-        "commit-lockfile-summary",
-        "just testing",
-      ],
-    },
-    {
-      inputs: {
-        nixOptions: ["--debug"],
-        flakeInputs: [],
-        commitMessage: "just testing",
-      },
-      expected: [
-        "--debug",
-        "flake",
-        "update",
-        "--commit-lock-file",
-        "--option",
-        "commit-lockfile-summary",
-        "just testing",
-      ],
-    },
-  ];
-
-  testCases.forEach(({ inputs, expected }) => {
-    const args = makeNixCommandArgs(
-      inputs.nixOptions,
-      inputs.flakeInputs,
-      inputs.commitMessage,
-    );
-    expect(args).toStrictEqual(expected);
-  });
-});
--- a/src/nix.ts
+++ b/src/nix.ts
@ -1,31 +0,0 @@
-// Build the Nix args out of inputs from the Actions environment
-export function makeNixCommandArgs(
-  nixOptions: string[],
-  flakeInputs: string[],
-  commitMessage: string,
-): string[] {
-  const flakeInputFlags = flakeInputs.flatMap((input) => [
-    "--update-input",
-    input,
-  ]);
-
-  // NOTE(cole-h): In Nix versions 2.23.0 and later, `commit-lockfile-summary` became an alias to
-  // the setting `commit-lock-file-summary` (https://github.com/NixOS/nix/pull/10691), and Nix does
-  // not treat aliases the same as their "real" setting by requiring setting aliases to be
-  // configured via `--option <alias name> <option value>`
-  // (https://github.com/NixOS/nix/issues/10989).
-  // So, we go the long way so that we can support versions both before and after Nix 2.23.0.
-  const lockfileSummaryFlags = [
-    "--option",
-    "commit-lockfile-summary",
-    commitMessage,
-  ];
-
-  const updateLockMechanism = flakeInputFlags.length === 0 ? "update" : "lock";
-
-  return nixOptions
-    .concat(["flake", updateLockMechanism])
-    .concat(flakeInputFlags)
-    .concat(["--commit-lock-file"])
-    .concat(lockfileSummaryFlags);
-}
--- a/0
+++ b/0
--- a/tsconfig.json
+++ b/tsconfig.json
@ -1,15 +0,0 @@
-{
-  "compilerOptions": {
-    "target": "ES2020" /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */,
-    "module": "Node16",
-    "moduleResolution": "NodeNext",
-    "outDir": "./dist",
-    "rootDir": "./src",
-    "strict": true /* Enable all strict type-checking options. */,
-    "noImplicitAny": true /* Raise error on expressions and declarations with an implied 'any' type. */,
-    "esModuleInterop": true /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */,
-    "resolveJsonModule": true,
-    "declaration": true
-  },
-  "exclude": ["node_modules", "**/*.test.ts", "dist"]
-}
--- a/tsup.config.ts
+++ b/tsup.config.ts
@ -1,16 +0,0 @@
-import { name } from "./package.json";
-import { defineConfig } from "tsup";
-
-export default defineConfig({
-  name,
-  entry: ["src/index.ts"],
-  format: ["esm"],
-  target: "node20",
-  bundle: true,
-  splitting: false,
-  sourcemap: true,
-  clean: true,
-  dts: {
-    resolve: true,
-  },
-});