Use a $PREFIX variable instead of harcoding it in multiple places

Author: eregon

.github/workflows/build.yml

@@ -53,24 +53,33 @@ jobs:
         else
           echo "RUBY_BUILD_RUBY_NAME=$ruby" >> $GITHUB_ENV
         fi
+    - name: Set PREFIX
+      run: |
+        ruby="${{ matrix.ruby }}"
+        if [[ $ruby == ruby-* ]]; then
+          # See https://github.com/ruby/setup-ruby/issues/98
+          echo "PREFIX=$RUNNER_TOOL_CACHE/Ruby/${ruby#ruby-}/x64" >> $GITHUB_ENV
+        else
+          echo "PREFIX=$HOME/.rubies/$ruby" >> $GITHUB_ENV
+        fi
     - name: Build Ruby
-      run: ruby-build --verbose $RUBY_BUILD_RUBY_NAME $HOME/build_prefix/${{ matrix.ruby }}
+      run: ruby-build --verbose $RUBY_BUILD_RUBY_NAME $PREFIX
       env:
         RUBY_CONFIGURE_OPTS: --enable-shared --enable-rpath --enable-load-relative --disable-install-doc
         CPPFLAGS: "-DENABLE_PATH_CHECK=0" # https://github.com/actions/virtual-environments/issues/267
     - name: Fix the RubyGems line when using load-relative
-      run: ~/build_prefix/${{ matrix.ruby }}/bin/ruby --disable-gems fix-rubygems-line.rb
+      run: $PREFIX/bin/ruby --disable-gems fix-rubygems-line.rb
       if: startsWith(matrix.ruby, 'ruby-')
     - name: Create archive
-      run: tar czf ${{ matrix.ruby }}-${{ matrix.os }}.tar.gz -C ~/build_prefix ${{ matrix.ruby }}
+      run: tar czf ${{ matrix.ruby }}-${{ matrix.os }}.tar.gz -C $(dirname $PREFIX) $(basename $PREFIX)
     - name: Install Bundler if needed
       run: |
-        if [ ! -e ~/build_prefix/${{ matrix.ruby }}/bin/bundle ]; then
-          export PATH="$HOME/build_prefix/${{ matrix.ruby }}/bin:$PATH"
+        if [ ! -e $PREFIX/bin/bundle ]; then
+          export PATH="$PREFIX/bin:$PATH"
           gem install bundler -v '~> 1' --no-document
         fi
 
-    - run: echo "$HOME/build_prefix/${{ matrix.ruby }}/bin" >> $GITHUB_PATH
+    - run: echo "$PREFIX/bin" >> $GITHUB_PATH
     - run: ruby --version
     - run: ruby -ropen-uri -e 'puts open("https://rubygems.org/") { |f| f.read(1024) }'
     - run: gem install json:2.2.0 --no-document
@@ -116,30 +125,32 @@ jobs:
       run: '! curl -s --head --fail https://github.com/ruby/ruby-builder/releases/download/${{ steps.info.outputs.tag }}/${{ matrix.ruby }}-${{ matrix.os }}.tar.gz'
       shell: bash
 
+    - name: Set PREFIX
+      run: echo "PREFIX=$HOME/.rubies/${{ matrix.ruby }}" >> $GITHUB_ENV
     - run: curl --fail -L -O 'https://repo1.maven.org/maven2/org/jruby/jruby-dist/${{ matrix.jruby-version }}/jruby-dist-${{ matrix.jruby-version }}-bin.tar.gz'
       shell: bash
     - name: Build JRuby
       shell: bash
       run: |
-        mkdir ~/build_prefix
-        tar xf jruby-dist-${{ matrix.jruby-version }}-bin.tar.gz -C ~/build_prefix
-        cd ~/build_prefix/${{ matrix.ruby }}/bin
+        mkdir $(dirname $PREFIX)
+        tar xf jruby-dist-${{ matrix.jruby-version }}-bin.tar.gz -C $(dirname $PREFIX)
+        cd $PREFIX/bin
         # Copy bash launcher, so 'ruby' works in bash
         cp jruby ruby
         # Create ruby.bat, so 'ruby' works in pwsh
         echo -en "@ECHO OFF\r\n@\"%~dp0jruby.exe\" %*\r\n" > ruby.bat
     - name: Create archive
-      run: tar czf ${{ matrix.ruby }}-${{ matrix.os }}.tar.gz -C ~/build_prefix ${{ matrix.ruby }}
+      run: tar czf ${{ matrix.ruby }}-${{ matrix.os }}.tar.gz -C $(dirname $PREFIX) $(basename $PREFIX)
       shell: bash
     - name: Install Bundler if needed
       shell: bash
       run: |
-        if [ ! -e ~/build_prefix/${{ matrix.ruby }}/bin/bundle ]; then
-          export PATH="$HOME/build_prefix/${{ matrix.ruby }}/bin:$PATH"
+        if [ ! -e $PREFIX/bin/bundle ]; then
+          export PATH="$PREFIX/bin:$PATH"
           gem install bundler -v '~> 1' --no-document
         fi
 
-    - run: echo "$Env:UserProfile\build_prefix\${{ matrix.ruby }}\bin" >> $Env:GITHUB_PATH
+    - run: echo "$Env:UserProfile\.rubies\${{ matrix.ruby }}\bin" >> $Env:GITHUB_PATH
     - run: echo $Env:PATH
 
     - run: ruby --version