Replace xtask with justfile

Author: ajeetdsouza

.github/workflows/ci.yml

@@ -26,14 +26,22 @@ jobs:
       - uses: actions-rs/toolchain@v1
         if: ${{ matrix.os == 'windows-latest' }}
         with:
+          components: clippy
+          profile: minimal
           toolchain: stable
-          components: rustfmt, clippy
+
+      - uses: actions-rs/toolchain@v1
+        if: ${{ matrix.os == 'windows-latest' }}
+        with:
+          components: rustfmt
           profile: minimal
-          override: true
+          toolchain: nightly
+
       - uses: cachix/install-nix-action@v20
         if: ${{ matrix.os != 'windows-latest' }}
         with:
           nix_path: nixpkgs=channel:nixos-unstable
+
       - uses: cachix/cachix-action@v12
         if: ${{ matrix.os != 'windows-latest' && env.CACHIX_AUTH_TOKEN != '' }}
         with:
@@ -45,7 +53,13 @@ jobs:
         with:
           key: ${{ matrix.os }}
 
-      - run: cargo xtask ci
-        if: ${{ matrix.os == 'windows-latest' }}
-      - run: nix-shell --cores 0 --pure --run 'rm -rf ~/.cargo/bin; cargo xtask ci'
-        if: ${{ matrix.os != 'windows-latest' }}
+      - name: Install just
+        uses: taiki-e/install-action@v2
+        with:
+          tool: just
+
+      - name: Run lints
+        run: just lint
+
+      - name: Run tests
+        run: just test