Merge pull request #91 from rex-rs/ci

 - ci: new nix flake auto-update actions

Signed-off-by: Jinghao Jia <jinghao7@illinois.edu>

Author: jinghao-jia

.github/workflows/memcached_benchmark.yml

@@ -45,7 +45,7 @@ jobs:
         with:
           name: devenv
       - name: Install devenv.sh
-        run: nix profile install nixpkgs#devenv
+        run: nix profile add nixpkgs#devenv
 
       - name: Build the devenv shell and run any pre-commit hooks
         run: devenv test

.github/workflows/update-nix.yml

@@ -0,0 +1,46 @@
+name: Update Nix Dependencies
+on:
+  workflow_dispatch:
+  # push:
+  #   branches: [ ci ] # for testing
+  schedule:
+    - cron: '0 0 * * 1' # Monday morning at 00:00 UTC
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  update-nix:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@main
+
+      - uses: cachix/cachix-action@3ba601ff5bbb07c7220846facfa2cd81eeee15a1 # v16
+        with:
+          name: devenv
+      - name: Install devenv.sh
+        run: nix profile add nixpkgs#devenv
+
+      - name: Update tools/memcached_benchmark/devenv.lock
+        run: |
+          cd tools/memcached_benchmark
+          devenv update
+
+      - name: Update root flake.lock
+        uses: DeterminateSystems/update-flake-lock@main
+        with:
+          pr-title: "nix-flake: update nix dependencies"
+          pr-labels: |
+            dependencies
+            nix
+          pr-body: |
+            Automated update of Nix dependencies:
+            - Root `flake.lock` updated
+            - `tools/memcached_benchmark/devenv.lock` updated