Use bundler to install danger gem

Author: thomchop

.github/workflows/danger.yml

@@ -1,13 +1,14 @@
-# This workflow runs SwiftLint on all Swift files
-
-name: SwiftLint
+name: Danger + SwiftLint
 
 on:
   pull_request:
     paths:
       - '.github/workflows/danger.yml'
       - '.swiftlint.yml'
       - '**/*.swift'
+      - 'Dangerfile'
+      - 'Gemfile'
+      - 'Gemfile.lock'
 
 jobs:
   lint_danger:
@@ -17,6 +18,9 @@ jobs:
     - name: Checkout PR
       uses: actions/checkout@v2
 
+    - name: Install bundler and danger gems
+      run: sudo gem install bundler && bundle install
+
     - name: Run SwiftLint and output to lintreport.json
       run: swiftlint lint --quiet --reporter json | tee lintreport.json
 

Gemfile

@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+source "https://rubygems.org"
+
+gem "danger"

Gemfile.lock

@@ -0,0 +1,63 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.7.0)
+      public_suffix (>= 2.0.2, < 5.0)
+    claide (1.0.3)
+    claide-plugins (0.9.2)
+      cork
+      nap
+      open4 (~> 1.3)
+    colored2 (3.1.2)
+    cork (0.3.0)
+      colored2 (~> 3.1)
+    danger (8.2.0)
+      claide (~> 1.0)
+      claide-plugins (>= 0.9.2)
+      colored2 (~> 3.1)
+      cork (~> 0.1)
+      faraday (>= 0.9.0, < 2.0)
+      faraday-http-cache (~> 2.0)
+      git (~> 1.7)
+      kramdown (~> 2.3)
+      kramdown-parser-gfm (~> 1.0)
+      no_proxy_fix
+      octokit (~> 4.7)
+      terminal-table (~> 1)
+    faraday (1.1.0)
+      multipart-post (>= 1.2, < 3)
+      ruby2_keywords
+    faraday-http-cache (2.2.0)
+      faraday (>= 0.8)
+    git (1.7.0)
+      rchardet (~> 1.8)
+    kramdown (2.3.0)
+      rexml
+    kramdown-parser-gfm (1.1.0)
+      kramdown (~> 2.0)
+    multipart-post (2.1.1)
+    nap (1.1.0)
+    no_proxy_fix (0.1.2)
+    octokit (4.19.0)
+      faraday (>= 0.9)
+      sawyer (~> 0.8.0, >= 0.5.3)
+    open4 (1.3.4)
+    public_suffix (4.0.6)
+    rchardet (1.8.0)
+    rexml (3.2.4)
+    ruby2_keywords (0.0.2)
+    sawyer (0.8.2)
+      addressable (>= 2.3.5)
+      faraday (> 0.8, < 2.0)
+    terminal-table (1.8.0)
+      unicode-display_width (~> 1.1, >= 1.1.1)
+    unicode-display_width (1.7.0)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  danger
+
+BUNDLED WITH
+   2.1.4