Merge pull request #151 from jonas/prepare-release

Add script to build the executables for linux and macOS

Author: kornilova203

.gitignore

@@ -1,3 +1,4 @@
 target/
 scripts/.coursier
 scripts/.scalafmt-*
+/scala-native-bindgen-*

README.md

@@ -8,13 +8,21 @@ This tool generates Scala Native bindings from C headers. It's built upon clang
 
 ## Releasing
 
-To release version `x.y.z` run:
+First build the `scala-native-bindgen` executable for both macOS and
+Linux:
+
+    > scripts/prepare-release.sh
+
+You should now have `scala-native-bindgen-linux` and
+`scala-native-bindgen-darwin` if you ran the script on a macOS machine.
+
+Then release version `x.y.z` by running:
 
     > sbt -Dproject.version=x.y.z release
 
-Then build the `scala-native-bindgen` executable for both macOS and
-Linux and upload them to the GitHub release page with the suffix
-`-darwin` and `-linux`, respectively.
+Finally, upload the `scala-native-bindgen-linux` and
+`scala-native-bindgen-darwin` executables to the release page at:
+<https://github.com/kornilova-l/scala-native-bindgen/releases/tag/vx.y.z>
 
 ## License
 

docker-compose.yml

@@ -8,7 +8,7 @@ services:
       args:
         - UBUNTU_VERSION=18.04
         - LLVM_VERSION=6.0
-    entrypoint: [scala-native-bindgen]
+    entrypoint: [/scala-native-bindgen]
 
   ubuntu-18.04-llvm-6.0:
     image: scalabindgen/scala-native-bindgen-builder:ubuntu-18.04-llvm-6.0

scripts/prepare-release.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+#
+# Build Linux and if possible macOS executables.
+
+# Bash strict mode
+# http://redsymbol.net/articles/unofficial-bash-strict-mode/
+set -euo pipefail
+IFS=$'\n\t'
+
+ROOT="$(cd "$(dirname "$0")/.." && pwd)"
+
+LINUX_EXEC="$ROOT/scala-native-bindgen-linux"
+if [[ ! -e "$LINUX_EXEC" ]]; then
+  docker-compose build bindgen
+  local container="$(docker container create "scalabindgen/scala-native-bindgen:${VERSION:-latest}")"
+  docker cp "$container:/scala-native-bindgen" "$LINUX_EXEC"
+  docker container rm "$container"
+fi
+
+MACOS_EXEC="$ROOT/scala-native-bindgen-darwin"
+if [[ "$(uname -s)" = "Darwin" ]] && [[ ! -e "$MACOS_EXEC" ]]; then
+  json_dir="$(ls /usr/local/Cellar/nlohmann_json/ | sort | tail -n 1)/include"
+  rm -rf bindgen/target
+  mkdir -p bindgen/target
+  (cd bindgen/target && cmake -DSTATIC_LINKING=ON -DCMAKE_CXX_FLAGS="-isystem $json_dir" ..)
+  make -C bindgen/target
+  cp bindgen/target/scala-native-bindgen "$MACOS_EXEC"
+fi