Initial ci config.

Author: boris-spas

.travis.yml

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+os:
+    - linux
+    - osx
+
+language: java
+
+env:
+    - GRAALVM_VERSION="19.0.2"
+    - GRAALVM_VERSION="NONE" SL_BUILD_NATIVE="false"
+
+install:
+    - |
+        cd .. && mv simpletool "simple tool" && cd "simple tool"
+        if [[ "$GRAALVM_VERSION" != "NONE" ]]; then
+          if [[ "$TRAVIS_OS_NAME" == "osx" ]];   then DOWNLOAD_OS_NAME="darwin"; fi
+          if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then DOWNLOAD_OS_NAME="linux"; fi
+          curl -LJ "https://github.com/oracle/graal/releases/download/vm-$GRAALVM_VERSION/graalvm-ce-$DOWNLOAD_OS_NAME-amd64-$GRAALVM_VERSION.tar.gz" --output graalvm.tar.gz
+          tar -xzf graalvm.tar.gz
+          export JAVA_HOME="$(pwd)/graalvm-ce-$GRAALVM_VERSION"
+          if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then export JAVA_HOME="$JAVA_HOME/Contents/Home"; fi
+          "$JAVA_HOME/bin/gu" install native-image
+        else
+          if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then export JAVA_HOME=$(/usr/libexec/java_home); fi
+        fi
+
+script:
+    - mvn package
+	- ./simpletool js example.js

ci.jsonnet

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+{
+  local basicBuild = {
+    targets: ['gate'],
+    timelimit: '00:59:59',
+    run: [
+      ['mvn', 'clean'],
+      ['mvn', 'package'],
+      ['./simpletool', 'js', 'example.js'],
+    ],
+  },
+
+  local graalvm = {
+    downloads+: {
+      JAVA_HOME: { name: 'graalvm', version: '19.0.2', platformspecific: true },
+    },
+  },
+
+  local linux = {
+    capabilities+: ['linux', 'amd64'],
+    packages+: {
+      maven: '==3.3.9',
+    },
+  },
+
+  local darwin = {
+    capabilities+: ['darwin_sierra', 'amd64'],
+    environment+: {
+      MACOSX_DEPLOYMENT_TARGET: '10.11',
+    },
+  },
+
+  builds: [
+    basicBuild + linux + graalvm + { name: 'linux' },
+
+    basicBuild + darwin + graalvm + { name: 'darwin' },
+  ],
+}