Overview

GPM ("General Package Manager") is a programming tool designed for monorepos (multi-package repositories). GPM automatically discovers packages and infers how to test/build them. You can optionally write .gpm.yaml configuration files.

Links

• Pub package
• Issue tracker

Alternatives

• Custom test/build scripts (Bash, Dart, etc.).
  • GPM saves time and is less error-prone.
• CI tools
  • GPM is just a simple command-line tool that developers can use in their local development machine. It doesn't replace CI tools. GPM can be used to generate configurations for CI tools.
• mono_repo
  • mono_repo appears to be focused on running Travis CI tests locally.

Installing

Then run:

pub global activate gpm

Alternatively, if you have only Flutter SDK installed, you can run: flutter pub global activate gpm

Test installation by running gpm. If you haven't configured your PATH environmental variable properly (see Dart SDK / Flutter SDK instructions), attempting to run GPM will give you a "command not found" error message. In this case, you can still use GPM by running pub global run gpm (or flutter pub global run gpm).

Examples

Show packages in the directory tree

gpm info

The command will show debug information.

Get dependencies

gpm get

The above command will run:

• flutter pub get (for each Flutter SDK package)
• pub get (for each Dart SDK package)

Test

gpm test

The above command will run:

• flutter test (for each Flutter SDK package, when flutter_test dependency is found)
• flutter pub run test (for each Flutter SDK package, when flutter_test dependency is not found)
• pub run test (for each Dart SDK package)

Build

gpm build

The above command will run:

• flutter build apk (for each Flutter SDK package that has android directory)
• flutter build ios (for each Flutter SDK package that has ios directory)
• flutter build web (for each Flutter SDK package that has web directory)
• pub global run webdev build (for each Dart SDK package that has web directory)
  • If webdev is not activated, it activates it.

Initialize CI configuration

Azure Pipelines

gpm ci init azure

This will generate ".ci/.azure-pipelines.yml".

Github Actions

gpm ci init github

This will generate ".github/workflows/dart.yml".

Gitlab CI

gpm ci init gitlab

This will generate ".gitlab-ci.yml".

Travis

gpm ci init travis

This will generate ".travis-ci.yml".

Upgrade GPM to the latest version

gpm upgrade

This is just a shorthand for pub global activate gpm.

Optional configuration file

Filename

The following filenames are supported:

• .gpm.yaml
• gpm.yaml

Defining packages

By default, GPM assumes that every directory that contains pubspec.yaml is a package. Packages are currently handled in alphabetical order.

You can customize this in gpm.yaml:

packages:
  - path: some/package
    # Override default test step(s)
    test:
      run: flutter test
    # Override default build step(s)
    build:
      steps:
        - run: flutter build apk
        - run: flutter build ios
        - run: flutter build web

  - path: some/other/package

Defining scripts

In gpm.yaml:

scripts:
  protos:
    description: Generates Dart files from Protocol Buffers definitions.
    steps:
        # Define working directory
      - directory: some/directory

        # Run 'protoc' command.
        # @(X) causes every "/" in X to be replaced with "\" when running in Windows.
        run: protoc --dart-out @(lib/generated/) definition.proto

        # You could optionally define platform:
        # platform: "posix || windows"


        # Another step
      - directory: some/directory
        run: protoc --dart-out @(lib/generated/) another_definition.proto

Then run:

gpm run protos

Syntax rules for run are:

• "a b c" (a quoted argument)
• "\@\(\)" (escape character "\" works inside a quoted argument)
• $(ENV_VAR) (an environmental variable)
• @(a/b/c) (replaces "/" with "" in Windows)