Docker image to support Gradle builds for Kotlin Native and Multiplatform projects.

Motivation

The goal of this Docker image is to provide an easy way to build Kotlin Native and Multiplatform apps in a Continous Integration environment.

The functionality provided in this image is based uppon the work of:

• andyneff
• soywiz

Currently supported build targets:

• mingwX64
• linuxX64

How to use

Example Bash script to build a Windows executable which needs the libcurl MSYS2 package during linking

#!/bin/bash
docker run -it --rm --cap-add SYS_PTRACE \
           -v "$PWD:/work:delegated" \
           -v docker-kotlin-native-mp_wine-home:/home/.user_wine \
           -e TARGETS='mingwX64' \
      	   -e MSYS2_PACKAGES='mingw-w64-x86_64-curl' \
           thowimmer/kotlin-native-mp:latest \
           root -c "gosu user wineconsole gradlew.bat --no-daemon $*"

Example Bash script to build a Linux executable which needs the libcurl APT package during linking

#!/bin/bash
docker run -it --rm --cap-add SYS_PTRACE \
           -v "$PWD:/work:delegated" \
           -v docker-kotlin-native-mp_linux-home:/root \
           -v docker-kotlin-native-mp_linux-usr:/usr \
           -e TARGETS='linuxX64' \
           -e APT_PACKAGES='libcurl4-openssl-dev' \
           thowimmer/kotlin-native-mp:latest \
           root -c "gosu user ./gradlew --no-daemon $*"

Environment variables

TARGETS environment variable

Semicolon separated list of supported build targets.

MSYS2_PACKAGES environment variable

Semicolon separated list of MSYS2 packages to install during initial setup. Only relevant for build target mingwX64.

APT_PACKAGES environment variable

Semicolon separated list of APT packages to install during initial setup. Only relevant for build target linuxX64.

Additional notes

• All relevant dependencies will be downloaded and persisted in the Docker volumes during the first build execution for a specific targets. Therefore subsequent builds will be significantly faster.

• A build is not limited to single target. This means that you can adapt the docker run command with the required environment variables and command line arguments accordingly to execute a build for multiple targets.