ci: Split cabal and stack caches into deps and work

More fine-grained caching should give us better cache hits and much
fewer upload size in the regular case, improving CI performance.

Author: wolfgangwalther

.cirrus.yml

@@ -17,10 +17,20 @@ build_task:
       '**.hs'
     )
 
-  stack_cache:
+  stack_deps_cache:
     folders: /.stack
-    fingerprint_script: cat postgrest.cabal stack.yaml.lock
-    reupload_on_changes: false
+    fingerprint_script:
+      - echo $CIRRUS_OS
+      - stack --version
+      - cat stack.yaml.lock
+
+  stack_work_cache:
+    folders: .stack-work
+    fingerprint_script:
+      - echo $CIRRUS_OS
+      - stack --version
+      - cat stack.yaml.lock
+      - find main src -type f -iname '*.hs' -exec md5sum "{}" +
 
   build_script: |
     stack build -j 1 --local-bin-path . --copy-bins

.github/workflows/build.yaml

@@ -91,40 +91,48 @@ jobs:
             runs-on: ubuntu-22.04
             cache: |
               ~/.stack
-              .stack-work
             # no artifact for Linux, because we use the static build
 
           - name: MacOS
             runs-on: macos-12
             cache: |
               ~/.stack
-              .stack-work
             artifact: postgrest-macos-x64
 
           - name: Windows
             runs-on: windows-2022
             cache: |
               ~\AppData\Roaming\stack
               ~\AppData\Local\Programs\stack
-              .stack-work
             deps: Add-Content $env:GITHUB_PATH $env:PGBIN
             artifact: postgrest-windows-x64
 
     name: Stack - ${{ matrix.name }}
     runs-on: ${{ matrix.runs-on }}
     steps:
       - uses: actions/checkout@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b # v4.1.5
-      - name: Restore stack working files cache
+      - name: Install dependencies
+        if: matrix.deps
+        run: ${{ matrix.deps }}
+      - name: Restore ~/.stack cache
         uses: actions/cache/restore@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9 # v4.0.2
-        id: restore-cache
+        id: restore-stack
         with:
           path: ${{ matrix.cache }}
-          key: stack-${{ runner.os }}-${{ hashFiles('stack.yaml.lock') }}
+          key: stack-${{ runner.os }}-deps-${{ hashFiles('stack.yaml.lock') }}-${{ hashFiles('postgrest.cabal') }}
           restore-keys: |
-            stack-${{ runner.os }}-
-      - name: Install dependencies
-        if: matrix.deps
-        run: ${{ matrix.deps }}
+            stack-${{ runner.os }}-deps-${{ hashFiles('stack.yaml.lock') }}-
+            stack-${{ runner.os }}-deps-
+      - name: Restore .stack-work cache
+        uses: actions/cache/restore@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9 # v4.0.2
+        id: restore-stack-work
+        with:
+          path: .stack-work
+          key: stack-${{ runner.os }}-work-${{ hashFiles('stack.yaml.lock') }}-${{ hashFiles('postgrest.cabal') }}-${{ hashFiles('main/*.hs', 'src/**/*.hs') }}
+          restore-keys: |
+            stack-${{ runner.os }}-work-${{ hashFiles('stack.yaml.lock') }}-${{ hashFiles('postgrest.cabal') }}-
+            stack-${{ runner.os }}-work-${{ hashFiles('stack.yaml.lock') }}-
+            stack-${{ runner.os }}-work-
       - name: Build with Stack
         run: stack build --lock-file error-on-write --local-bin-path result --copy-bins
       - name: Strip Executable
@@ -138,12 +146,18 @@ jobs:
             result/postgrest
             result/postgrest.exe
           if-no-files-found: error
-      - name: Save stack working files cache
+      - name: Save .stack-work cache
+        if: startsWith(github.ref, 'refs/heads/')
+        uses: actions/cache/save@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9 # v4.0.2
+        with:
+          path: .stack-work
+          key: ${{ steps.restore-stack-work.outputs.cache-primary-key }}
+      - name: Save ~/.stack cache
         if: startsWith(github.ref, 'refs/heads/')
         uses: actions/cache/save@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9 # v4.0.2
         with:
           path: ${{ matrix.cache }}
-          key: ${{ steps.restore-cache.outputs.cache-primary-key }}
+          key: ${{ steps.restore-stack.outputs.cache-primary-key }}
 
 
   freebsd:
@@ -177,29 +191,44 @@ jobs:
       - name: Fix caching
         run: |
           mkdir ~/.cabal
-      - name: Restore cache
+      - name: Restore .cabal cache
         uses: actions/cache/restore@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9 # v4.0.2
-        id: restore-cache
+        id: restore-cabal
         with:
           path: |
             ~/.cabal/packages
             ~/.cabal/store
-            dist-newstyle
-          key: cabal-${{ runner.os }}-${{ matrix.ghc }}-${{ hashFiles('postgrest.cabal', 'cabal.project', 'cabal.project.freeze') }}
+          key: cabal-${{ runner.os }}-${{ matrix.ghc }}-cabal-${{ hashFiles('cabal.project', 'cabal.project.freeze') }}-${{ hashFiles('postgrest.cabal') }}
           restore-keys: |
-            cabal-${{ runner.os }}-${{ matrix.ghc }}-
+            cabal-${{ runner.os }}-${{ matrix.ghc }}-cabal-${{ hashFiles('cabal.project', 'cabal.project.freeze') }}-
+            cabal-${{ runner.os }}-${{ matrix.ghc }}-cabal-
+      - name: Restore dist-newstyle cache
+        uses: actions/cache/restore@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9 # v4.0.2
+        id: restore-dist-newstyle
+        with:
+          path: dist-newstyle
+          key: cabal-${{ runner.os }}-${{ matrix.ghc }}-dist-newstyle-${{ hashFiles('cabal.project', 'cabal.project.freeze') }}-${{ hashFiles('postgrest.cabal') }}-${{ hashFiles('**/*.hs') }}
+          restore-keys: |
+            cabal-${{ runner.os }}-${{ matrix.ghc }}-dist-newstyle-${{ hashFiles('cabal.project', 'cabal.project.freeze') }}-${{ hashFiles('postgrest.cabal') }}-
+            cabal-${{ runner.os }}-${{ matrix.ghc }}-dist-newstyle-${{ hashFiles('cabal.project', 'cabal.project.freeze') }}-
+            cabal-${{ runner.os }}-${{ matrix.ghc }}-dist-newstyle-
       - name: Install dependencies
         run: |
           cabal update
           cabal build --only-dependencies --enable-tests --enable-benchmarks
       - name: Build
         run: cabal build --enable-tests --enable-benchmarks all
-      - name: Save cache
+      - name: Save dist-newstyle cache
+        if: startsWith(github.ref, 'refs/heads/')
+        uses: actions/cache/save@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9 # v4.0.2
+        with:
+          path: dist-newstyle
+          key: ${{ steps.restore-dist-newstyle.outputs.cache-primary-key }}
+      - name: Save .cabal cache
         if: startsWith(github.ref, 'refs/heads/')
         uses: actions/cache/save@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9 # v4.0.2
         with:
           path: |
             ~/.cabal/packages
             ~/.cabal/store
-            dist-newstyle
-          key: ${{ steps.restore-cache.outputs.cache-primary-key }}
+          key: ${{ steps.restore-cabal.outputs.cache-primary-key }}