ci: Use YAML anchor and aliases for repeated "Checkout" steps

Author: hebasto

.github/workflows/ci.yml

@@ -108,7 +108,8 @@ jobs:
       CC: ${{ matrix.cc }}
 
     steps:
-      - name: Checkout
+      - &checkout
+        name: Checkout
         uses: actions/checkout@v4
 
       - name: CI script
@@ -145,8 +146,7 @@ jobs:
       CC: ${{ matrix.cc }}
 
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
+      - *checkout
 
       - name: CI script
         uses: ./.github/actions/run-in-docker-action
@@ -177,8 +177,7 @@ jobs:
       CTIMETESTS: 'no'
 
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
+      - *checkout
 
       - name: CI script
         uses: ./.github/actions/run-in-docker-action
@@ -217,8 +216,7 @@ jobs:
       CTIMETESTS: 'no'
 
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
+      - *checkout
 
       - name: CI script
         env: ${{ matrix.configuration.env_vars }}
@@ -258,8 +256,7 @@ jobs:
           - 'clang-snapshot'
 
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
+      - *checkout
 
       - name: CI script
         uses: ./.github/actions/run-in-docker-action
@@ -290,8 +287,7 @@ jobs:
       CTIMETESTS: 'no'
 
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
+      - *checkout
 
       - name: CI script
         uses: ./.github/actions/run-in-docker-action
@@ -352,8 +348,7 @@ jobs:
       SECP256K1_TEST_ITERS: 2
 
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
+      - *checkout
 
       - name: CI script
         env: ${{ matrix.env_vars }}
@@ -396,8 +391,7 @@ jobs:
       SYMBOL_CHECK: 'no'
 
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
+      - *checkout
 
       - name: CI script
         env: ${{ matrix.configuration.env_vars }}
@@ -447,8 +441,7 @@ jobs:
       SYMBOL_CHECK: 'no'
 
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
+      - *checkout
 
       - name: CI script
         env: ${{ matrix.configuration.env_vars }}
@@ -490,8 +483,7 @@ jobs:
               HOST: 'i686-w64-mingw32'
 
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
+      - *checkout
 
       - name: CI script
         env: ${{ matrix.configuration.env_vars }}
@@ -531,8 +523,7 @@ jobs:
           - BUILD: 'distcheck'
 
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
+      - *checkout
 
       - name: Install Homebrew packages
         run: |
@@ -583,8 +574,7 @@ jobs:
           - BUILD: 'distcheck'
 
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
+      - *checkout
 
       - name: Install Homebrew packages
         run: |
@@ -635,8 +625,7 @@ jobs:
             cmake_options: '-T ClangCL'
 
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
+      - *checkout
 
       - name: Generate buildsystem
         run: cmake -E env CFLAGS="/WX ${{ matrix.configuration.cpp_flags }}" cmake -B build -DSECP256K1_ENABLE_MODULE_RECOVERY=ON -DSECP256K1_BUILD_EXAMPLES=ON ${{ matrix.configuration.cmake_options }}
@@ -671,8 +660,7 @@ jobs:
     runs-on: windows-2022
 
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
+      - *checkout
 
       - name: Add cl.exe to PATH
         uses: ilammy/msvc-dev-cmd@v1
@@ -699,8 +687,7 @@ jobs:
       ELLSWIFT: 'yes'
 
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
+      - *checkout
 
       - name: CI script
         uses: ./.github/actions/run-in-docker-action
@@ -718,8 +705,7 @@ jobs:
     needs: docker_cache
 
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
+      - *checkout
 
       - name: CI script
         uses: ./.github/actions/run-in-docker-action
@@ -738,8 +724,7 @@ jobs:
       options: --user root
 
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
+      - *checkout
 
       - name: CI script
         run: |
@@ -750,8 +735,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
+      - *checkout
 
       - run: ./autogen.sh && ./configure --enable-dev-mode && make distcheck