Migration to flake

.github/workflows/book.yml

@@ -41,9 +41,7 @@ jobs:
       - uses:  DeterminateSystems/magic-nix-cache-action@v6
 
       - name: Build book
-        shell: bash
-        run: |
-          nix build
+        run: nix build .#book
 
       - name: Setup Pages
         uses: actions/configure-pages@v5

.github/workflows/ci.yml

@@ -15,39 +15,13 @@ permissions:
   contents: read
 
 jobs:
-  build:
+  check:
     runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        rust:
-          - "1.74"
-          - stable
-          - beta
-          - nightly
-        cargo-update:
-          - true
-        include:
-          - rust: stable
-            cargo-update: false
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@master
+      - uses: cachix/install-nix-action@v27
         with:
-          toolchain: ${{ matrix.rust }}
-      - name: Update
-        if: matrix.cargo-update
-        run: cargo update
-      - name: Run tests
-        run: cargo test
-  lint:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@master
-        with:
-          toolchain: stable
-          components: rustfmt clippy
-      - name: Run rustfmt check
-        run: cargo fmt --all -- --check
-      - name: Run clippy
-        run: cargo clippy --all --all-targets -- -D warnings
+          nix_path: nixpkgs=channel:nixos-unstable
+      - uses:  DeterminateSystems/magic-nix-cache-action@v6
+      - name: Run checks
+        run: nix flake check

.github/workflows/update-rust-overlay.yml

@@ -0,0 +1,30 @@
+name: Update rust-overlay
+on:
+  schedule:
+    - cron: "0 3 * * *" # Every day 03:00 UTC
+jobs:
+  update:
+    permissions:
+      contents: write
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: cachix/install-nix-action@v27
+        with:
+          nix_path: nixpkgs=channel:nixos-unstable
+      - run: nix flake lock --update-input rust-overlay
+      - name: Commit changes
+        id: commit
+        continue-on-error: true
+        run: |
+          git config user.name "Github Action"
+          git config user.email "[email protected]"
+          git add flake.lock
+          git commit -m "build: update rust-overlay"
+      - name: Push changes
+        if: steps.commit.outcome == 'success'
+        uses: ad-m/github-push-action@master
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          branch: main
+

.gitignore

@@ -2,10 +2,6 @@
 # will have compiled files and executables
 /target/
 
-# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
-# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
-Cargo.lock
-
 # These are backup files generated by rustfmt
 **/*.rs.bk