Set PATH at once

Merged: https://github.com/ruby/ruby/pull/2731

.github/workflows/cygwin.yml

@@ -33,28 +33,27 @@ jobs:
         run: |
           C:\tools\cygwin\cygwinsetup.exe -qgnNdO -R C:/tools/cygwin -s http://mirrors.kernel.org/sourceware/cygwin/ -P autoconf,bison,gcc-core,git,libcrypt-devel,libedit-devel,libffi-devel,libgdbm-devel,libgmp-devel,libintl-devel,libncurses-devel,libreadline-devel,libssl-devel,libuuid-devel,make,patch,ruby,tcl-tk-devel,zlib-devel
         shell: cmd
+      - name: Set ENV
+        run: |
+          echo '::set-env name=PATH::C:\tools\cygwin\bin;C:\tools\cygwin\usr\bin'
       # Not using official actions/checkout because it's unstable and sometimes doesn't work for a fork.
       - name: Checkout ruby/ruby
         run: |
-          path C:\tools\cygwin\bin;C:\tools\cygwin\usr\bin
           git clone --single-branch --shallow-since=yesterday https://github.com/ruby/ruby src
           git -C src reset --hard ${{ github.sha }}
         if: github.event_name == 'push'
         shell: cmd
       - name: Checkout a pull request
         run: |
-          path C:\tools\cygwin\bin;C:\tools\cygwin\usr\bin
           git clone --single-branch --shallow-since=yesterday --branch=${{ github.event.pull_request.head.ref }} https://github.com/${{ github.event.pull_request.head.repo.full_name }} src
           git -C src reset --hard ${{ github.event.pull_request.head.sha }}
         if: github.event_name == 'pull_request'
         shell: cmd
       - name: Actions-commit-info.sh
         run: |
-          path C:\tools\cygwin\bin;C:\tools\cygwin\usr\bin
           bash.exe -c "./src/tool/actions-commit-info.sh"
         shell: cmd
       - name: Autoconf && configure & make & make btest
         run: |
-          path C:\tools\cygwin\bin;C:\tools\cygwin\usr\bin
           bash.exe -c "cd src && autoconf && ./configure && make && make btest"
         shell: cmd