use cargo cross

The problems I had using podman were resolved by realizing that ubuntu-latest
does not actually mean the latest version of Ubuntu (for now) so explicitly
stating the Ubuntu version, installing podman works fine and can build binaries
for Raspberry Pi properly.

.github/workflows/rust.yml

@@ -25,7 +25,7 @@ jobs:
       upload_url: ${{ steps.create_release.outputs.upload_url }}
 
   build_ubuntu:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     needs: create_release
     steps:
     - uses: actions/checkout@v1
@@ -73,19 +73,21 @@ jobs:
     needs: create_release
     steps:
     - uses: actions/checkout@v1
-    - run: rustc -Vv
     - name: Build
       run: cargo build --verbose --release
+    - name: strip names
+      run: strip target/release/agate.exe
+    - name: compress
+      run: gzip -c target/release/agate.exe > ./agate.exe.gz
     - name: upload release asset win
       uses: actions/upload-release-asset@v1
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       with:
         upload_url: ${{ needs.create_release.outputs.upload_url }}
-        asset_name: agate.x86_64-pc-windows-msvc.exe
-        # TODO: this one is not zipped and not stripped
-        asset_path: target/release/agate.exe
-        asset_content_type: application/vnd.microsoft.portable-executable
+        asset_name: agate.x86_64-pc-windows-msvc.exe.gz
+        asset_path: agate.exe.gz
+        asset_content_type: application/gzip
 
   build_macos:
     runs-on: macos-latest

Cross.toml

@@ -0,0 +1,2 @@
+[target.arm-unknown-linux-gnueabihf]
+image = "zenria/cross:arm-rpi-4.9.3-linux-gnueabihf"

release.sh

@@ -5,13 +5,13 @@ set -e
 
 # Cross-compiling needs a linker for the respective platforms. If you are on a Debian-based x86_64 Linux,
 # you can install them with:
-sudo apt -y install gcc-arm-linux-gnueabihf gcc-aarch64-linux-gnu
+sudo apt -y install podman gcc-arm-linux-gnueabihf gcc-aarch64-linux-gnu
+# Also install cross compilation tool for cargo
+cargo install cross
 
 for i in x86_64-unknown-linux-gnu aarch64-unknown-linux-gnu arm-unknown-linux-gnueabihf armv7-unknown-linux-gnueabihf
 do
-	# Make sure the cross-compiled std crate is available.
-	rustup target add $i
-	cargo build --verbose --release --target $i
+	cross build --verbose --release --target $i
 	cp target/$i/release/agate agate.$i
 done