chore(ci): cross-compilation of Rust Binary (#3)

* chore: tentative of arm cross-compilation

* chore: master -> main

* chore: rustup option

* chore: install gcc for arm linux

* chore: linker erro

* chore: linker cargo flag

* chore: use cross instead of cargo

* chore: release build

* chore: install libpq in cross docker env

.github/workflows/main.yml

@@ -0,0 +1,32 @@
+name: Build
+on:
+  # Triggers the workflow on push or pull request events but only for the main branch
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+      - name: Setup Rust Toolchain
+        run: |
+          curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- --profile minimal --no-modify-path -y
+          # the target comes from running `rustup target list` on the Olimex board
+          rustup target add armv7-unknown-linux-gnueabihf
+          cargo install cross --git https://github.com/cross-rs/cross
+          sudo apt-get install -y gcc-arm-linux-gnueabihf
+      - name: Build
+        run: cross build --release --target=armv7-unknown-linux-gnueabihf
+      - name: Release
+        uses: softprops/action-gh-release@v2
+        if: startsWith(github.ref, 'refs/tags/')
+        with:
+          files: |
+            target/release/eye
+        

Cargo.toml

@@ -26,3 +26,9 @@ shrinkwraprs = "0.2"
 thiserror = "1.0"
 time = "0.2"
 walkdir = "2"
+
+[workspace.metadata.cross.target.armv7-unknown-linux-gnueabihf]
+pre-build = [
+    "dpkg --add-architecture $CROSS_DEB_ARCH",
+    "apt-get update && apt-get --assume-yes install libpq-dev:$CROSS_DEB_ARCH"
+]