Initial commit

.envrc

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+use flake

.github/workflows/check.yml

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+name: "Check"
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  update:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@main
+      with:
+        token: '${{ secrets.PAT_FOR_AUTOMATED_UPDATE }}'
+    - name: Install nix
+      uses: cachix/install-nix-action@master
+      with:
+        nix_path: nixpkgs=channel:nixos-unstable
+        extra_nix_config: |
+          experimental-features = nix-command flakes
+          access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
+    - name: Setup cachix
+      uses: cachix/cachix-action@master
+      with:
+        name: linyinfeng
+        signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
+    - name: Nix flake check
+      run: |
+        nix flake check

.gitignore

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+/target
+/result*
+/.direnv
+/.vscode