refactor: use clang-format style

You can run this with:

```bash
net-style
```

The style is also checked on CI.

Author: steve-chavez

.clang-format

@@ -1,2 +1,42 @@
-BasedOnStyle: LLVM
-IndentWidth: 4
+AlignAfterOpenBracket: Align
+AlignConsecutiveAssignments: true
+AlignConsecutiveDeclarations: true
+AlignOperands: true
+AllowAllParametersOfDeclarationOnNextLine: false
+AllowShortFunctionsOnASingleLine: Empty
+AllowShortLoopsOnASingleLine: false
+AlwaysBreakAfterDefinitionReturnType: None
+AlwaysBreakAfterReturnType: None
+AlwaysBreakBeforeMultilineStrings: false
+BinPackArguments: true
+BinPackParameters: true
+ColumnLimit: 100
+IndentPPDirectives: AfterHash
+MaxEmptyLinesToKeep: 1
+PointerAlignment: Right
+SpaceBeforeAssignmentOperators: true
+SpaceBeforeParens: ControlStatements
+SpaceInEmptyParentheses: false
+SpacesBeforeTrailingComments: 1
+BracedInitializerIndentWidth: 2
+
+# includes
+IncludeBlocks: Preserve
+SortIncludes: true
+
+# indentation
+IndentWidth: 2
+TabWidth: 2
+UseTab: Never
+
+# if
+AllowShortIfStatementsOnASingleLine: true
+
+# case
+IndentCaseLabels: false
+AllowShortCaseLabelsOnASingleLine: true
+AlignConsecutiveShortCaseStatements:
+  Enabled: true
+  AcrossEmptyLines: true
+  AcrossComments: true
+  AlignCaseColons: true

.github/workflows/main.yml

@@ -105,3 +105,24 @@ jobs:
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           files: ./build-${{ matrix.pg-version }}/coverage.info
+
+  style:
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Nix
+        uses: cachix/[email protected]
+        with:
+          nix_path: nixpkgs=channel:nixos-unstable
+
+      - name: Use Cachix Cache
+        uses: cachix/cachix-action@v16
+        with:
+          name: nxpg
+          authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
+
+      - name: Run style check
+        run: nix-shell --run "net-style-check"

shell.nix

@@ -14,13 +14,24 @@ mkShell {
         psycopg2
         sqlalchemy
       ];
+      style =
+        writeShellScriptBin "net-style" ''
+          ${clang-tools}/bin/clang-format -i src/*
+        '';
+      styleCheck =
+        writeShellScriptBin "net-style-check" ''
+          ${clang-tools}/bin/clang-format -i src/*
+          ${git}/bin/git diff-index --exit-code HEAD -- '*.c'
+        '';
     in
     [
       xpg.xpg
       pythonDeps
       nginxCustom.nginxScript
       curlWithGnuTls
       loadtest
+      style
+      styleCheck
     ];
   shellHook = ''
     export HISTFILE=.history