rust: Initial implementation

.github/workflows/rust.yaml

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+name: CI for Rust backend
+
+on:
+  push:
+    branches: [main]
+    paths:
+      - benchmarker/**/*
+      - webapp/rust/**/*
+      - .github/workflows/rust.yaml
+  pull_request:
+    paths:
+      - benchmarker/**/*
+      - webapp/rust/**/*
+      - .github/workflows/rust.yaml
+
+jobs:
+  lint:
+    name: Lint
+    runs-on: self-hosted
+    timeout-minutes: 15
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          components: rustfmt, clippy
+      - name: Run cargo fmt
+        uses: actions-rs/cargo@v1
+        with:
+          command: fmt
+          args: --manifest-path webapp/rust/Cargo.toml -- --check
+      - name: Run cargo clippy
+        uses: actions-rs/cargo@v1
+        with:
+          command: clippy
+          args: --manifest-path webapp/rust/Cargo.toml
+
+  test:
+    name: Test
+    runs-on: self-hosted
+    timeout-minutes: 15
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup environment
+        run: make -C dev up TARGET=rust
+      - uses: actions/setup-go@v2
+        with:
+          go-version: 1.16
+      - name: Run benchmarker with -no-load
+        run: |
+          make -C benchmarker
+          benchmarker/bin/benchmarker -no-load -exit-status
+      - name: Teardown environment
+        if: ${{ always() }}
+        run: make -C dev down TARGET=rust

dev/docker-compose-rust.yaml

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+version: '3'
+
+services:
+  frontend:
+    build:
+      context: ../webapp/frontend
+      dockerfile: ../../dev/frontend/Dockerfile
+    volumes:
+      - ./nginx:/etc/nginx/conf.d
+    ports:
+      - "8080:80"
+    depends_on:
+      - backend
+  backend:
+    build:
+      context: ../webapp/rust
+      dockerfile: ../../dev/rust/Dockerfile
+    restart: always
+    environment:
+      MYSQL_HOSTNAME: mysql
+      DEBUG: "true"
+    entrypoint: dockerize -timeout 60s -wait tcp://mysql:3306
+    command: /webapp/rust/target/debug/isucholar
+    ports:
+      - "7000:7000"
+    depends_on:
+      - mysql
+    volumes:
+      - ../webapp/data:/webapp/data:ro
+      - ../webapp/sql:/webapp/sql:ro
+  mysql:
+    image: mysql
+    restart: always
+    # setup.sqlの代替
+    environment:
+      MYSQL_ROOT_PASSWORD: password
+      MYSQL_USER: isucon
+      MYSQL_PASSWORD: isucon
+      MYSQL_DATABASE: isucholar
+    command: mysqld --character-set-server=utf8mb4 --collation-server=utf8mb4_bin
+    expose:
+      - "3306"
+    ports:
+      - "3306:3306"
+    volumes:
+      - mysql:/var/lib/mysql
+
+volumes:
+  mysql:

dev/rust/Dockerfile

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+FROM rust:1.55.0-buster
+
+WORKDIR /webapp/rust
+
+RUN apt-get update && apt-get install -y zip
+
+ARG DOCKERIZE_VERSION=v0.6.1
+RUN curl -sSfLO https://github.com/jwilder/dockerize/releases/download/$DOCKERIZE_VERSION/dockerize-linux-amd64-$DOCKERIZE_VERSION.tar.gz \
+    && tar -C /usr/local/bin -xzvf dockerize-linux-amd64-$DOCKERIZE_VERSION.tar.gz \
+    && rm dockerize-linux-amd64-$DOCKERIZE_VERSION.tar.gz
+
+COPY Cargo.lock /Cargo.toml ./
+RUN mkdir src &&  echo 'fn main() {}' > src/main.rs && cargo build --locked && rm src/main.rs target/debug/deps/isucholar-*
+
+COPY . ./
+RUN cargo build --locked --frozen
+
+CMD ["/webapp/rust/target/debug/isucholar"]

webapp/rust/.dockerignore

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+/target

webapp/rust/.gitignore

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+/target