merge revision(s) b0a4e2399b:

CI: mingw: Use the official actions for msys2

	Because ruby/setup-ruby is affected to test result.

Also includes the prerequisite changes from e4b386e090, 90f8199412,
a443cd012a and 4adb6f6969 (Remove Strawberry Perl pkg-config, misc
system & package info, `cmd` as the default shell, set up msys2
environment variables).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

.github/workflows/mingw.yml

@@ -37,6 +37,7 @@ jobs:
     env:
       MSYSTEM: ${{ matrix.msystem }}
       MSYS2_ARCH: x86_64
+      MINGW_PACKAGE_PREFIX: mingw-w64-ucrt-x86_64
       CHOST: 'x86_64-w64-mingw32'
       CFLAGS: '-march=x86-64 -mtune=generic -O3 -pipe'
       CXXFLAGS: '-march=x86-64 -mtune=generic -O3 -pipe'
@@ -48,9 +49,7 @@ jobs:
       matrix:
         include:
           # To mitigate flakiness of MinGW CI, we test only one runtime that newer MSYS2 uses.
-          # Ruby 3.2 is the first Windows Ruby to use OpenSSL 3.x
           - msystem: 'UCRT64'
-            baseruby: '3.2'
             test_task: 'check'
             test-all-opts: '--name=!/TestObjSpace#test_reachable_objects_during_iteration/'
       fail-fast: false
@@ -66,40 +65,90 @@ jobs:
       )}}
 
     steps:
-      - name: Set up Ruby & MSYS2
-        uses: ruby/setup-ruby@651ff0d62c5c79bed6d53ec518387aae20e72c1a # v1.329.0
+      - uses: msys2/setup-msys2@ec48f7c5447b3140e2b088413ae3a55687bccb6e # v2.33.0
+        id: msys2
         with:
-          ruby-version: ${{ matrix.baseruby }}
+          msystem: ${{ matrix.msystem }}
+          update: true
+          install: >-
+            git
+            make
+            ruby
+            autoconf
+            ${{ env.MINGW_PACKAGE_PREFIX }}-gcc
+            ${{ env.MINGW_PACKAGE_PREFIX }}-ragel
+            ${{ env.MINGW_PACKAGE_PREFIX }}-openssl
+            ${{ env.MINGW_PACKAGE_PREFIX }}-libyaml
+            ${{ env.MINGW_PACKAGE_PREFIX }}-libffi
 
-      - name: Install MSYS2 perl
+      - name: Set up env
+        id: setup-env
         working-directory:
-        # MSYS2 dropped perl from its base install, and the runner image
-        # picked that up, so `autoreconf` no longer finds its interpreter.
-        # https://github.com/actions/runner-images/issues/14562
-        run: pacman --sync --refresh --needed --noconfirm perl
+        run: |
+          $msys2 = ${env:MSYS2_LOCATION}
+          $msystem = ${env:MSYSTEM}.ToLower()
+          echo $msys2\usr\bin $msys2\$msystem\bin |
+            Tee-Object ${env:GITHUB_PATH} -Append -Encoding utf-8
+
+          # Use the fast device for the temporary directory.
+          # %TEMP% is inconsistent with %TMP% and test-all expects they are consistent.
+          # https://github.com/actions/virtual-environments/issues/712#issuecomment-613004302
+          $tmp = ${env:RUNNER_TEMP}
+          echo HOME=$home TMP=$tmp TEMP=$tmp TMPDIR=$tmp |
+            Tee-Object ${env:GITHUB_ENV} -Append -Encoding utf-8
+        shell: pwsh             # cmd.exe does not strip spaces before `|`.
+        env:
+          MSYS2_LOCATION: ${{ steps.msys2.outputs.msys2-location }}
+          MSYSTEM: ${{ matrix.msystem }}
+
+      - name: Remove Strawberry Perl pkg-config
+        working-directory:
+        # `pkg-config.bat` included in Strawberry Perl is written in
+        # Perl and doesn't work when another msys2 `perl` precede its
+        # own `perl`.
+        #
+        # ```
+        # Can't find C:\Strawberry\perl\bin\pkg-config.bat on PATH, '.' not in PATH.
+        # ```
+        run: |
+          Get-Command pkg-config.bat | % { ren $_.path ($_.path + "~") }
+        shell: pwsh
 
       - name: Misc system & package info
         working-directory:
         run: |
-          # show where
-          result=true
-          for e in gcc.exe ragel.exe make.exe libcrypto-3-x64.dll libssl-3-x64.dll; do
-            echo ::group::$'\033[93m'$e$'\033[m'
-            where $e || result=false
-            echo ::endgroup::
-          done
-          # show version
-          for e in gcc ragel make "openssl version"; do
-            case "$e" in *" "*) ;; *) e="$e --version";; esac
-            echo ::group::$'\033[93m'$e$'\033[m'
-            $e || result=false
-            echo ::endgroup::
-          done
-          # show packages
-          echo ::group::$'\033[93m'Packages$'\033[m'
-          pacman -Qs mingw-w64-ucrt-x86_64-* | sed -n "s,local/mingw-w64-ucrt-x86_64-,,p"
-          echo ::endgroup::
-          $result
+          group() { echo ::group::$'\e[94;1m'"$*"$'\e[m'; }
+          endgroup() { echo ::endgroup::; }
+
+          group Path
+          cygpath -wa / . $(type -p cygpath bash sh)
+          endgroup
+
+          I() {
+              group $1
+              run Where type -pa $1 && { [ $# -eq 1 ] || run Version "$@"; } ||
+                  failed+=($1)
+              endgroup
+          }
+          run() { local w m=$1; shift; w="$("$@")" && show "$m" && indent "$w"; }
+          indent() { [ -z "$1" ] || echo "$1" | /bin/sed '/^$/!s/^/  /'; }
+          show() { echo $'\e[96m'"$*"$'\e[m'; }
+
+          failed=()
+
+          I gcc.exe --version
+          I ragel.exe --version
+          I make.exe --version
+          I openssl.exe version
+          I libcrypto-3-x64.dll
+          I libssl-3-x64.dll
+
+          group Packages
+          pacman -Qs $MINGW_PACKAGE_PREFIX-* | /bin/sed -n "s,local/$MINGW_PACKAGE_PREFIX-,,p"
+          endgroup
+
+          [ ${#failed[@]} -eq 0 ]
+        shell: sh
 
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
@@ -118,6 +167,7 @@ jobs:
         run: >
           ../src/configure --disable-install-doc --prefix=/.
           --build=$CHOST --host=$CHOST --target=$CHOST
+        shell: sh
 
       - name: make all
         timeout-minutes: 30
@@ -139,7 +189,6 @@ jobs:
       - name: test
         timeout-minutes: 30
         run: make test
-        shell: cmd
         env:
           GNUMAKEFLAGS: ''
           RUBY_TESTOPTS: '-v --tty=no'
@@ -147,7 +196,6 @@ jobs:
 
       - name: test-all
         timeout-minutes: 45
-        shell: cmd
         run: |
           make ${{ StartsWith(matrix.test_task, 'test/') && matrix.test_task || 'test-all' }}
         env:
@@ -162,7 +210,6 @@ jobs:
         timeout-minutes: 10
         run: |
           make ${{ StartsWith(matrix.test_task, 'spec/') && matrix.test_task || 'test-spec' }}
-        shell: cmd
         if: ${{ matrix.test_task == 'check' || matrix.test_task == 'test-spec' || StartsWith(matrix.test_task, 'spec/') }}
 
       - uses: ./src/.github/actions/slack
@@ -174,4 +221,4 @@ jobs:
 defaults:
   run:
     working-directory: build
-    shell: sh
+    shell: cmd