Use rubygems.org API to determine if the version should be bumped

.github/workflows/build-gem.yml

@@ -6,11 +6,14 @@ jobs:
   build-gem:
     runs-on: ubuntu-latest
     continue-on-error: true
+    defaults:
+      run:
+        shell: bash
 
     strategy:
       matrix:
         ruby-version: ['2.5', '2.7']
-    
+
     steps:
       - uses: actions/checkout@v2
       - name: Set up Ruby ${{ matrix.ruby-version }}
@@ -19,8 +22,6 @@ jobs:
           ruby-version: ${{ matrix.ruby-version }}
       - name: Check if gem exists
         run: |
-          GEM_VERSION=$(ruby -e "require 'scc/codestyle'; print Scc::Codestyle::VERSION" -I lib)
-          # if we install the gem, then the $GEM_VERSION already exist on rubygems.org
-          # therefore error
-          gem install -q --silent scc-codestyle -v $GEM_VERSION && (touch failed-install && exit 0) || exit 0
-          test -f failed-install && (echo "bump the gem version!" && exit 1)
+          LOCAL_GEM_VERSION=$(ruby -e "require 'scc/codestyle'; print Scc::Codestyle::VERSION" -I lib)
+          REMOTE_GEM_VERSION=$(curl 'https://rubygems.org/api/v1/versions/scc-codestyle/latest.json' | jq '.version' | tr -d \")
+          if [ "$(printf '%s\n' "$LOCAL_GEM_VERSION" "$REMOTE_GEM_VERSION" | sort -rV | head -n 1)" != "$REMOTE_GEM_VERSION" ]; then echo exit 0; else (echo "bump the gem version!" && exit 1); fi

lib/scc/codestyle/version.rb

@@ -1,5 +1,5 @@
 module Scc
   module Codestyle
-    VERSION = '0.6.2'.freeze
+    VERSION = '0.6.4'.freeze
   end
 end