Use artifact for build environment

.github/workflows/ci.yml

@@ -36,7 +36,6 @@ jobs:
               uses: cachix/install-nix-action@v26
               with:
                   nix_path: nixpkgs=channel:nixos-unstable
-                  # Add `nix-community`, Crane, upstream Conduit, and conduwuit binary caches
                   extra_nix_config: |
                       experimental-features = nix-command flakes
                       extra-substituters = https://nix-community.cachix.org
@@ -56,41 +55,22 @@ jobs:
                   echo "extra-substituters = ${{ env.ATTIC_ENDPOINT }}" >> /etc/nix/nix.conf
                   echo "extra-trusted-public-keys = ${{ env.ATTIC_PUBLIC_KEY }}" >> /etc/nix/nix.conf
 
-            - name: Pop/push Magic Nix Cache
-              uses: DeterminateSystems/magic-nix-cache-action@main
-
-            - name: Configure `nix-direnv`
-              run: |
-                  echo 'source $HOME/.nix-profile/share/nix-direnv/direnvrc' > "$HOME/.direnvrc"
-
             - name: Install `direnv` and `nix-direnv`
               run: nix-env -f "<nixpkgs>" -iA direnv -iA nix-direnv
 
-            - name: Pop/push downloaded crate cache
-              uses: actions/cache@v4
-              with:
-                  key: downloaded-crates
-                  path: ~/.cargo
-
-            - name: Pop/push compiled crate cache
-              uses: actions/cache@v4
-              with:
-                  key: compiled-crates-${{runner.os}}
-                  path: target
-
-            # Do this to shorten the logs for the real CI step
             - name: Populate `/nix/store`
               run: nix develop --command true
 
-            - name: Allow direnv
+            # Store the build environment in an artifact
-              run: direnv allow
+            - name: Cache build environment
-
+              uses: actions/upload-artifact@v4
-            - name: Cache x86_64 inputs for devShell
+              with:
-              run: |
+                  name: build-environment
-                  ./bin/nix-build-and-cache .#devShells.x86_64-linux.default.inputDerivation
+                  path: |
-
+                      /nix/store
-            - name: Perform continuous integration
+                      ~/.cargo
-              run: direnv exec . engage
+                      $HOME/.direnvrc
+                      /etc/nix/nix.conf
 
     build_and_package:
         needs: setup
@@ -108,66 +88,23 @@ jobs:
                     ]
 
         steps:
+            - name: Download Build Environment
+              uses: actions/download-artifact@v4
+              with:
+                  name: build-environment
+
             - name: Sync repository
               uses: actions/checkout@v4
 
-            - name: Install Nix (with flakes and nix-command enabled)
+            - name: Reuse Build Environment
-              uses: cachix/install-nix-action@v26
-              with:
-                  nix_path: nixpkgs=channel:nixos-unstable
-
-                  # Add `nix-community`, Crane, upstream Conduit, and conduwuit binary caches
-                  extra_nix_config: |
-                      experimental-features = nix-command flakes
-                      extra-substituters = https://nix-community.cachix.org
-                      extra-trusted-public-keys = nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs=
-                      extra-substituters = https://crane.cachix.org
-                      extra-trusted-public-keys = crane.cachix.org-1:8Scfpmn9w+hGdXH/Q9tTLiYAE/2dnJYRJP7kl80GuRk=
-                      extra-substituters = https://nix.computer.surgery/conduit
-                      extra-trusted-public-keys = conduit:ZGAf6P6LhNvnoJJ3Me3PRg7tlLSrPxcQ2RiE5LIppjo=
-                      extra-substituters = https://attic.kennel.juneis.dog/conduit
-                      extra-trusted-public-keys = conduit:Isq8FGyEC6FOXH6nD+BOeAA+bKp6X6UIbupSlGEPuOg=
-                      extra-substituters = https://attic.kennel.juneis.dog/conduwuit
-                      extra-trusted-public-keys = conduwuit:lYPVh7o1hLu1idH4Xt2QHaRa49WRGSAqzcfFd94aOTw=
-
-            - name: Add alternative Nix binary caches if specified
-              if: ${{ (env.ATTIC_ENDPOINT != '') && (env.ATTIC_PUBLIC_KEY != '') }}
               run: |
-                  echo "extra-substituters = ${{ env.ATTIC_ENDPOINT }}" >> /etc/nix/nix.conf
+                  # Ensure the nix configuration is correct
-                  echo "extra-trusted-public-keys = ${{ env.ATTIC_PUBLIC_KEY }}" >> /etc/nix/nix.conf
+                  sudo cp -R /etc/nix/nix.conf /etc/nix/nix.conf.bak
+                  sudo cp -R nix.conf /etc/nix/nix.conf
+                  # Source direnv
+                  source $HOME/.direnvrc
+                  direnv allow
  
-            - name: Pop/push Magic Nix Cache
-              uses: DeterminateSystems/magic-nix-cache-action@main
-
-            - name: Configure `nix-direnv`
-              run: |
-                  echo 'source $HOME/.nix-profile/share/nix-direnv/direnvrc' > "$HOME/.direnvrc"
-
-            - name: Install `direnv` and `nix-direnv`
-              run: nix-env -f "<nixpkgs>" -iA direnv -iA nix-direnv
-
-            - name: Pop/push downloaded crate cache
-              uses: actions/cache@v4
-              with:
-                  key: downloaded-crates
-                  path: ~/.cargo
-
-            - name: Pop/push compiled crate cache
-              uses: actions/cache@v4
-              with:
-                  key: compiled-crates-${{runner.os}}
-                  path: target
-
-            # Do this to shorten the logs for the real CI step
-            - name: Populate `/nix/store`
-              run: nix develop --command true
-
-            - name: Allow direnv
-              run: direnv allow
-
-            - name: Cache x86_64 inputs for devShell
-              run: |
-                  ./bin/nix-build-and-cache .#devShells.x86_64-linux.default.inputDerivation
             - name: Build static ${{ matrix.target }}
               run: |
                   ./bin/nix-build-and-cache .#static-${{ matrix.target }}