ci: Use bash by default for all platforms

This change enforces fail-fast behavior for all platforms.
See: https://docs.github.com/en/actions/writing-workflows/workflow-syntax-for-github-actions#exit-codes-and-error-action-preference

Author: hebasto

.github/workflows/ci.yml

@@ -21,6 +21,12 @@ env:
   CI_FAILFAST_TEST_LEAVE_DANGLING: 1  # GHA does not care about dangling processes and setting this variable avoids killing the CI script itself on error
   MAKEJOBS: '-j10'
 
+defaults:
+  run:
+    # Enforce fail-fast behavior for all platforms.
+    # See: https://docs.github.com/en/actions/writing-workflows/workflow-syntax-for-github-actions#exit-codes-and-error-action-preference
+    shell: bash
+
 jobs:
   test-each-commit:
     name: 'test each commit'
@@ -185,6 +191,7 @@ jobs:
           arch: x64
 
       - name: Get tool information
+        shell: pwsh
         run: |
           cmake -version | Tee-Object -FilePath "cmake_version"
           Write-Output "---"
@@ -194,6 +201,7 @@ jobs:
           Write-Host "PowerShell version $($PSVersionTable.PSVersion.ToString())"
 
       - name: Using vcpkg with MSBuild
+        shell: pwsh
         run: |
           Set-Location "$env:VCPKG_INSTALLATION_ROOT"
           Add-Content -Path "triplets\x64-windows.cmake" -Value "set(VCPKG_BUILD_TYPE release)"
@@ -213,8 +221,8 @@ jobs:
           key: ${{ github.job }}-vcpkg-binary-${{ hashFiles('cmake_version', 'msbuild_version', 'toolset_version', 'vcpkg.json') }}
 
       - name: Generate build system
-        run: |
-          cmake -B build --preset vs2022-static -DCMAKE_TOOLCHAIN_FILE="$env:VCPKG_INSTALLATION_ROOT\scripts\buildsystems\vcpkg.cmake" ${{ matrix.generate-options }}
+        shell: pwsh
+        run: cmake -B build --preset vs2022-static -DCMAKE_TOOLCHAIN_FILE="$env:VCPKG_INSTALLATION_ROOT\scripts\buildsystems\vcpkg.cmake" ${{ matrix.generate-options }}
 
       - name: Save vcpkg binary cache
         uses: actions/cache/save@v4
@@ -224,15 +232,15 @@ jobs:
           key: ${{ github.job }}-vcpkg-binary-${{ hashFiles('cmake_version', 'msbuild_version', 'toolset_version', 'vcpkg.json') }}
 
       - name: Build
+        shell: pwsh
         working-directory: build
-        run: |
-          cmake --build . -j $env:NUMBER_OF_PROCESSORS --config Release
+        run: cmake --build . -j $env:NUMBER_OF_PROCESSORS --config Release
 
       - name: Run test suite
         if: matrix.job-type == 'standard'
+        shell: pwsh
         working-directory: build
-        run: |
-          ctest --output-on-failure --stop-on-failure -j $env:NUMBER_OF_PROCESSORS -C Release
+        run: ctest --output-on-failure --stop-on-failure -j $env:NUMBER_OF_PROCESSORS -C Release
 
       - name: Run functional tests
         if: matrix.job-type == 'standard'
@@ -249,9 +257,9 @@ jobs:
       - name: Clone corpora
         if: matrix.job-type == 'fuzz'
         run: |
-          git clone --depth=1 https://github.com/bitcoin-core/qa-assets "$env:RUNNER_TEMP\qa-assets"
-          Set-Location "$env:RUNNER_TEMP\qa-assets"
-          Write-Host "Using qa-assets repo from commit ..."
+          git clone --depth=1 https://github.com/bitcoin-core/qa-assets "${RUNNER_TEMP}\qa-assets"
+          cd "${RUNNER_TEMP}\qa-assets"
+          echo "Using qa-assets repo from commit ..."
           git log -1
 
       - name: Run fuzz tests
@@ -260,8 +268,7 @@ jobs:
         env:
           BITCOINFUZZ: '${{ github.workspace }}\build\bin\Release\fuzz.exe'
         shell: cmd
-        run: |
-          py -3 test\fuzz\test_runner.py --par %NUMBER_OF_PROCESSORS% --loglevel DEBUG %RUNNER_TEMP%\qa-assets\fuzz_corpora
+        run: py -3 test\fuzz\test_runner.py --par %NUMBER_OF_PROCESSORS% --loglevel DEBUG %RUNNER_TEMP%\qa-assets\fuzz_corpora
 
   asan-lsan-ubsan-integer-no-depends-usdt:
     name: 'ASan + LSan + UBSan + integer, no depends, USDT'