Measure

Author: ibbem

.github/workflows/maven.yml

@@ -17,47 +17,20 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
-    - name: record files
+    - uses: cachix/install-nix-action@v31
+    - name: Evaluate Nix expressions
       run: |
-        find / -xdev -path /nix/store -prune -o -not -path ~/files-before-nix-installation -not -path ~/files-after-nix-installation -print | sort > ~/files-before-nix-installation
-    - name: Install Nix with cached packages
-      uses: ibbem/cache-install@351a9c03d8d6c28264e348d0df6b6e4b136a07ab
-      with:
-        key: nix-${{ hashFiles('.github/workflows/maven.yml', 'default.nix', 'nix/**', 'pom.xml', 'local-maven-repo') }}
-        nix_file: nix/github-workflow-dependencies.nix
-    - name: record files
-      run: |
-        find / -xdev -path /nix/store -prune -o -not -path ~/files-before-nix-installation -not -path ~/files-after-nix-installation -print | sort > ~/files-after-nix-installation
-        echo
-        echo "--------------------------------------- removed files ---------------------------------------"
-        comm -23 ~/files-before-nix-installation ~/files-after-nix-installation
-        echo
-        echo "--------------------------------------- added files ---------------------------------------"
-        comm -13 ~/files-before-nix-installation ~/files-after-nix-installation
-        echo "------------------------------------------------------------------------------"
-    - name: show new files
-      run: |
-        print() {
-          echo "------------------- start of $1 -------------------"
-          cat "$1" || true
-          echo "--------------------- end of $1 -------------------"
-        }
-
-        print /etc/bash.bashrc.backup-before-nix
-        print /etc/bashrc
-        print /etc/nix/nix.conf
-        print /etc/profile.d/nix.sh
-        print /etc/zshrc
-        print /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh
-
-        echo "NIX_PATH=$NIX_PATH"
-        ls -ld "$NIX_PATH" || true
-        ls -l "$NIX_PATH" || true
-
-        echo nix-info:
-        nix-shell -I nixpkgs=https://github.com/NixOS/nixpkgs/archive/6832d0d99649db3d65a0e15fa51471537b2c56a6.tar.gz -p nix-info --run 'nix-info --markdown'
+        nix-instantiate --expr '[ (import ./nix/github-workflow-dependencies.nix) (import ./default.nix)]' 2>&1 | grep '^/nix/store/' | tee derivations
+        echo 'dry build'
+        nix-store --realize --dry-run $(< derivations) 2>&1 | tee dry-build
+        echo 'to be fetched'
+        sed '1,/^these .* will be fetched/ d; s/^  //' dry-build | tee fetch
+        echo 'to be built'
+        sed -n '2,/^these .* will be fetched/ p' dry-build | grep -v '^these' | sed 's/  //' | tee built
+    - name: Fetch
+      run: nix-store --realize $(< fetch)
     - name: Build
-      run: nix-build
+      run: nix-store --realize $(< built)
     - name: Upload Javadoc artifact
       if: ${{ github.event_name == 'push' && github.event.ref == 'refs/heads/main' }}
       uses: actions/upload-pages-artifact@v3