Fix actions cache

.github/workflows/build.yml

@@ -14,23 +14,32 @@ jobs:
       uses: actions/setup-python@v1
       with:
         python-version: '3.8'
-    - uses: actions/cache@v1
+    - name: Setup Linux cache
+      uses: actions/cache@v1
       if: startsWith(runner.os, 'Linux')
       with:
         path: ~/.cache/pip
-        key: ${{ runner.os }}-pip
-    - uses: actions/cache@v1
+        key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+        restore-keys: |
+         ${{ runner.os }}-pip-
+    - name: Setup macOS cache
+      uses: actions/cache@v1
       if: startsWith(runner.os, 'macOS')
       with:
         path: ~/Library/Caches/pip
-        key: ${{ runner.os }}-pip
-    - uses: actions/cache@v1
+        key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+        restore-keys: |
+         ${{ runner.os }}-pip-
+    - name: Setup Windows cache
+      uses: actions/cache@v1
       if: startsWith(runner.os, 'Windows')
       with:
         path: ~\AppData\Local\pip\Cache
-        key: ${{ runner.os }}-pip
+        key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+        restore-keys: |
+         ${{ runner.os }}-pip-
     - name: Setup environment
-      run: python -m pip install --disable-pip-version-check meson==0.53.0 gcovr==4.2 ninja==1.9.0.post1
+      run: python -m pip install --disable-pip-version-check -r requirements.txt
     - name: Setup
       run: meson build
     - name: Build

requirements.txt

@@ -0,0 +1,5 @@
+# This is the pip requirements file used for when we build for CI
+
+meson==0.53.0
+gcovr==4.2
+ninja==1.9.0.post1