Initial commit

.clang-format

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+# Run manually to reformat a file:
+# clang-format -i --style=file <file>
+# find . -iname '*.cc' -o -iname '*.h' -o -iname '*.h.in' | xargs clang-format -i --style=file
+BasedOnStyle: Google
+DerivePointerAlignment: false
+
+# Public headers are in a different location in the internal Google repository.
+# Order them so that when imported to the authoritative repository they will be
+# in correct alphabetical order.
+IncludeCategories:
+  - Regex:           '^(<|"(benchmarks|db|helpers)/)'
+    Priority:        1
+  - Regex:           '^"(leveldb)/'
+    Priority:        2
+  - Regex:           '^(<|"(issues|port|table|third_party|util)/)'
+    Priority:        3
+  - Regex:           '.*'
+    Priority:        4

.github/workflows/build.yml

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+# Copyright 2021 The LevelDB Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file. See the AUTHORS file for names of contributors.
+
+name: ci
+on: [push, pull_request]
+
+permissions:
+  contents: read
+
+jobs:
+  build-and-test:
+    name:  >-
+      CI
+      ${{ matrix.os }}
+      ${{ matrix.compiler }}
+      ${{ matrix.optimized && 'release' || 'debug' }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        compiler: [clang, gcc, msvc]
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        optimized: [true, false]
+        exclude:
+        # MSVC only works on Windows.
+        - os: ubuntu-latest
+          compiler: msvc
+        - os: macos-latest
+          compiler: msvc
+        # Not testing with GCC on macOS.
+        - os: macos-latest
+          compiler: gcc
+        # Only testing with MSVC on Windows.
+        - os: windows-latest
+          compiler: clang
+        - os: windows-latest
+          compiler: gcc
+        include:
+        - compiler: clang
+          CC: clang
+          CXX: clang++
+        - compiler: gcc
+          CC: gcc
+          CXX: g++
+        - compiler: msvc
+          CC:
+          CXX:
+
+    env:
+      CMAKE_BUILD_DIR: ${{ github.workspace }}/build
+      CMAKE_BUILD_TYPE: ${{ matrix.optimized && 'RelWithDebInfo' || 'Debug' }}
+      CC: ${{ matrix.CC }}
+      CXX: ${{ matrix.CXX }}
+      BINARY_SUFFIX: ${{ startsWith(matrix.os, 'windows') && '.exe' || '' }}
+      BINARY_PATH: >-
+        ${{ format(
+        startsWith(matrix.os, 'windows') && '{0}\build\{1}\' || '{0}/build/',
+        github.workspace,
+        matrix.optimized && 'RelWithDebInfo' || 'Debug') }}
+
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        submodules: true
+
+- name: Install dependencies on Linux
+  if: ${{ runner.os == 'Linux' }}
+  run: |
+    sudo apt-get update
+    sudo apt-get install libkyotocabinet-dev libsnappy-dev libsqlite3-dev libnuma-dev
+
+    - name: Generate build config
+      run: >-
+        cmake -S "${{ github.workspace }}" -B "${{ env.CMAKE_BUILD_DIR }}"
+        -DCMAKE_BUILD_TYPE=${{ env.CMAKE_BUILD_TYPE }}
+        -DCMAKE_INSTALL_PREFIX=${{ runner.temp }}/install_test/
+
+    - name: Build
+      run: >-
+        cmake --build "${{ env.CMAKE_BUILD_DIR }}"
+        --config "${{ env.CMAKE_BUILD_TYPE }}"
+
+    - name: Run Tests
+      working-directory: ${{ github.workspace }}/build
+      run: ctest -C "${{ env.CMAKE_BUILD_TYPE }}" --verbose
+
+    - name: Run LevelDB Benchmarks
+      run: ${{ env.BINARY_PATH }}db_bench${{ env.BINARY_SUFFIX }}
+
+    - name: Run SQLite Benchmarks
+      if: ${{ runner.os != 'Windows' }}
+      run: ${{ env.BINARY_PATH }}db_bench_sqlite3${{ env.BINARY_SUFFIX }}
+
+    - name: Run Kyoto Cabinet Benchmarks
+      if: ${{ runner.os == 'Linux' && matrix.compiler == 'clang' }}
+      run: ${{ env.BINARY_PATH }}db_bench_tree_db${{ env.BINARY_SUFFIX }}
+
+    - name: Test CMake installation
+      run: cmake --build "${{ env.CMAKE_BUILD_DIR }}" --target install

.gitignore

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+# Editors.
+*.sw*
+.vscode
+.DS_Store
+
+# Build directory.
+build/
+out/

.gitmodules

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+[submodule "third_party/googletest"]
+	path = third_party/googletest
+	url = https://github.com/google/googletest.git
+[submodule "third_party/benchmark"]
+	path = third_party/benchmark
+	url = https://github.com/google/benchmark

AUTHORS

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+# Names should be added to this file like so:
+# Name or Organization <email address>
+
+Google Inc.
+
+# Initial version authors:
+Jeffrey Dean <[email protected]>
+Sanjay Ghemawat <[email protected]>
+
+# Partial list of contributors:
+Kevin Regan <[email protected]>
+Johan Bilien <[email protected]>