ci: Add github actions for CI

.github/FUNDING.yml

@@ -0,0 +1 @@
+github: [Xuanwo]

.github/actions/check/action.yml

@@ -0,0 +1,35 @@
+name: 'Check'
+description: 'Check will do all essential checks'
+inputs:
+  github_token:
+    description: "Github Token"
+    required: true
+runs:
+  using: "composite"
+  steps:
+    - uses: Swatinem/rust-cache@v1
+      with:
+        sharedKey: base-v1
+
+    - name: Format
+      uses: actions-rs/cargo@v1
+      with:
+        command: fmt
+        args: --all -- --check
+
+    - name: Install cargo-audit
+      uses: actions-rs/cargo@v1
+      with:
+        command: install
+        args: cargo-audit
+
+    - name: Audit dependencies
+      uses: actions-rs/cargo@v1
+      with:
+        command: audit
+
+    - name: Clippy
+      uses: actions-rs/cargo@v1
+      with:
+        command: clippy
+        args: --all-targets -- -D warnings

.github/dependabot.yml

@@ -0,0 +1,13 @@
+version: 2
+updates:
+  # Maintain dependencies for GitHub Actions
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"
+
+  # Maintain dependencies for rust
+  - package-ecosystem: "cargo"
+    directory: "/"
+    schedule:
+      interval: "daily"

.github/workflows/ci.yml

@@ -0,0 +1,52 @@
+name: CI
+
+on: [push, pull_request]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}-${{ github.event_name }}
+  cancel-in-progress: true
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: ./.github/actions/check
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os:
+          - ubuntu-latest
+          - macos-11
+          - windows-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: Swatinem/rust-cache@v1
+      - name: Build
+        uses: actions-rs/cargo@v1
+        with:
+          command: build
+
+  unit:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os:
+          - ubuntu-latest
+          - macos-11
+          - windows-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: Swatinem/rust-cache@v1
+      - name: Test
+        uses: actions-rs/cargo@v1
+        with:
+          command: test
+          args: -- --nocapture
+        env:
+          RUST_LOG: DEBUG
+          RUST_BACKTRACE: full

src/constant.rs

@@ -26,6 +26,7 @@ use std::time::Duration;
 ///     Ok(())
 /// }
 /// ```
+#[derive(Debug, Clone)]
 pub struct ConstantBackoff {
     delay: Duration,
     max_times: Option<usize>,

src/retry.rs

@@ -97,10 +97,15 @@ pub struct Retry<
     state: State<T, E, Fut>,
 }
 
+/// State maintains internal state of retry.
+///
+/// # Notes
+///
+/// `tokio::time::Sleep` is a very struct that occupy 640B, so we wrap it
+/// into a `Pin<Box<_>>` to avoid this enum too large.
 #[pin_project(project = StateProject)]
 enum State<T, E, Fut: Future<Output = std::result::Result<T, E>>> {
     Idle,
-
     Polling(#[pin] Fut),
     // TODO: we need to support other sleeper
     Sleeping(#[pin] Pin<Box<tokio::time::Sleep>>),
@@ -130,7 +135,6 @@ where
             match state {
                 StateProject::Idle => {
                     let fut = (this.future_fn)();
-                    // this.state = State::Polling(fut);
                     this.state.set(State::Polling(fut));
                     continue;
                 }
@@ -167,7 +171,7 @@ mod tests {
     }
 
     #[tokio::test]
-    async fn test_retry_x() -> anyhow::Result<()> {
+    async fn test_retry() -> anyhow::Result<()> {
         let result = always_error
             .retry(ExponentialBackoff::default().with_min_delay(Duration::from_millis(1)))
             .await;