ci: add CI build

.github/workflows/build.yml

@@ -0,0 +1,34 @@
+name: CI build
+
+on:
+  push:
+    branches: ["main"]
+    paths-ignore:
+      - "*.md"
+  pull_request:
+    branches: ["main"]
+    paths-ignore:
+      - "*.md"
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Use nightly Rust
+        run: |
+          rustup default nightly
+          rustup target add riscv32imac-unknown-none-elf
+          rustup target add riscv32imafc-unknown-none-elf
+          rustup target add riscv32i-unknown-none-elf
+      - name: Fetch Deps
+        run: |
+          mkdir -p ../ch32-data/build/
+          cd ../ch32-data/build/
+          git clone https://github.com/ch32-rs/ch32-metapac.git
+      - name: Build Only
+        run: |
+          ./ci.sh

ci.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+set -ex
+set -o pipefail
+
+for d in $(find examples -type d -depth 1); do
+    (cd $d && cargo build --release)
+done