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dancarvajc/swift: ⚠️ Stop saying "you forgot to …" in code review


Formalize your Pull Request etiquette.

Write your Dangerfiles in Swift.

Latest version requires Swift 5.5

If you are using an older Swift, use the supported version according to next table.

Swift version Danger support version 5.4 v3.15.0 5.3 v3.13.0 5.2 v3.11.1 5.1 v3.8.0 4.2 v2.0.7 4.1 v0.4.1 4.0 v0.3.6

You can make a Dangerfile that looks through PR metadata, it's fully typed.

import Danger

let danger = Danger()
let allSourceFiles = danger.git.modifiedFiles + danger.git.createdFiles

let changelogChanged = allSourceFiles.contains("CHANGELOG.md")
let sourceChanges = allSourceFiles.first(where: { $0.hasPrefix("Sources") })

if !changelogChanged && sourceChanges != nil {
  warn("No CHANGELOG entry added.")
}

// You can use these functions to send feedback:
message("Highlight something in the table")
warn("Something pretty bad, but not important enough to fail the build")
fail("Something that must be changed")

markdown("Free-form markdown that goes under the table, so you can do whatever.")

All of the docs are on the user-facing website: https://danger.systems/swift/

Infrastructure exists to support plugins, which can help you avoid repeating the same Danger rules across separate repos.

e.g. A plugin implemented with the following at https://github.com/username/DangerPlugin.git.

// DangerPlugin.swift
import Danger

public struct DangerPlugin {
    let danger = Danger()
    public static func doYourThing() {
        // Code goes here
    }
}
Swift Package Manager (More performant)

You can use Swift PM to install both danger-swift and your plugins:

By suffixing package: [url] to an import, you can directly import Swift PM package as a dependency

For example, a plugin could be used by the following.

// Dangerfile.swift

import DangerPlugin // package: https://github.com/username/DangerPlugin.git

DangerPlugin.doYourThing()

You can see an example danger-swift plugin.

(Recommended) Cache the ~/.danger-swift folder

For a Mac:

# Install danger-swift, and a bundled danger-js locally
brew install danger/tap/danger-swift
 # Run danger
danger-swift ci

For Linux:

# Install danger-swift
git clone https://github.com/danger/danger-swift.git
cd danger-swift
make install

# Install danger-js
npm install -g danger

 # Run danger
danger-swift ci

GitHub Actions

You can add danger/swift to your actions

jobs:
  build:
    runs-on: ubuntu-latest
    name: "Run Danger"
    steps:
      - uses: actions/checkout@v1
      - name: Danger
        uses: danger/swift@3.15.0
        with:
            args: --failOnErrors --no-publish-check
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

Danger has two different pre built images that you can use with your action:

In order to import one of those use the docker:// prefix

jobs:
  build:
    runs-on: ubuntu-latest
    name: "Run Danger"
    steps:
      - uses: actions/checkout@v1
      - name: Danger
        uses: docker://ghcr.io/danger/danger-swift:3.15.0
        with:
            args: --failOnErrors --no-publish-check
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

To use a local compiled copy of danger-js use the danger-js-path argument:

danger-swift command --danger-js-path path/to/danger-js
Current working directory

Many people prefers using the SPM Danger configuration, because is more performing. But having a Package.swift on your root folder can be annoying, especially now that Xcode (from 11) doesn't put on the recents list an xcproj (or xcworkspace) when there is a Package.swift in the same folder. With the --cwd parameter you can specify a working directory. This allows you to have your Package.swift in another directory and still run danger-swift as it was executed from your project root directory.

swift run danger-swift command --cwd path/to/working-directory

You need to be using Xcode >= 13.2.1.

git clone https://github.com/danger/danger-swift.git
cd danger-swift
swift build
swift run komondor install
swift package generate-xcodeproj
open danger-swift.xcodeproj

Then I tend to run danger-swift using swift run:

swift run danger-swift pr https://github.com/danger/swift/pull/95

If you want to emulate how DangerJS's process will work entirely, then use:

swift build && cat Fixtures/eidolon_609.json | ./.build/debug/danger-swift

Run swift run rocket $VERSION on master e.g. swift run rocket 1.0.0

Danger Swift is maintained by @f-meloni, and maybe you?


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