Generate a native executable via GraalVM #4

.gitignore

@@ -208,3 +208,5 @@ gradle-app.setting
 
 # End of https://www.gitignore.io/api/gradle,kotlin,eclipse,intellij,visualstudiocode
 /.idea/sonarIssues.xml
+/pullpitoK
+/libsunec.*

README.md

@@ -19,6 +19,16 @@ In order to show the 'usage':
 
     ./gradlew run --args "--help"
 
+## Install
+
+In order to generate a *nix executable, run:
+
+    ./generate-executable.sh
+
+An executable file named `pullpitoK` should be generated in the current directory. It can then be run:
+
+    ./pullpitoK
+
 ## Upgrade dependencies
 
     ./gradlew useLatestVersions

build.gradle.kts

@@ -1,20 +1,19 @@
 plugins {
-    val kotlinVersion = "1.3.20"
+    val kotlinVersion = "1.3.21"
     id("org.jetbrains.kotlin.jvm").version(kotlinVersion)
     id("com.adarshr.test-logger").version("1.6.0")
-    id("se.patrikerdes.use-latest-versions") version "0.2.7"
-    id("com.github.ben-manes.versions") version "0.20.0"
+    id("se.patrikerdes.use-latest-versions") version "0.2.9"
+    id("com.github.ben-manes.versions") version "0.21.0"
+    id("com.github.johnrengelman.shadow") version "5.0.0"
     application
 }
 
 repositories {
     jcenter()
-    maven { url = uri("https://kotlin.bintray.com/ktor") }
-    maven { url = uri("https://kotlin.bintray.com/kotlinx") } // Required since 0.9.4 since ktor-client-gson includes ktor-client-json that depends on kotlinx-serialization
+    maven { url = uri("https://plugins.gradle.org/m2") }
 }
 
 dependencies {
-    val ktorVersion = "1.1.2"
     compile("com.fasterxml.jackson.core:jackson-databind:2.9.8")
     implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
     testImplementation("org.jetbrains.kotlin:kotlin-test")

generate-executable.sh

@@ -0,0 +1,48 @@
+#!/bin/bash
+
+# Fail on error
+set -e
+
+echo "Building JAR file:"
+./gradlew shadowJar
+echo "JAR file has been built! ✅"
+
+echo "Install GraalVM via SDKMAN!:"
+curl --silent "https://get.sdkman.io" | bash || echo 'SDKMAN! already installed'
+source "$HOME/.sdkman/bin/sdkman-init.sh"
+GRAALVM_VERSION=1.0.0-rc-15-grl
+sdkman_auto_answer=true sdk install java $GRAALVM_VERSION > /dev/null
+sdk use java $GRAALVM_VERSION
+
+echo "Copying 'libsunec' shared library (Sun Elliptic Curve crypto):"
+set +e
+cp $JAVA_HOME/jre/lib/*/libsunec* . 2>/dev/null # Linux
+linux_libsunec=$?
+cp $JAVA_HOME/jre/lib/libsunec* . 2>/dev/null #macOS
+macos_libsunec=$?
+set -e
+if [ $linux_libsunec -ne 0 ] && [ $macos_libsunec -ne 0 ]; then
+	echo "Cannot copy 'libsunec' shared library"
+	exit 1
+fi
+echo "'libsunec' shared library has been copied! ✅"
+
+echo "Build executable from JAR via GraalVM:"
+native-image \
+   --no-server \
+   --enable-https \
+   -jar ./build/libs/pullpitoK-all.jar \
+   pullpitoK && \
+   echo ' => Check the executable: ' && ./pullpitoK
+echo "Executable has been built! ✅"
+
+echo "\nExecutable has been generated in local directory, try it copy/pasting this command:
+ $> ./pullpitoK python/peps
+
+Executable can also be run from an other directory via a 'PULLPITOK_LIBSUNEC'
+environment variable in order to load the 'libsunec' shared library (Sun
+Elliptic Curve crypto) bundled in the Java Development Kit.
+For instance, on Linux:
+ $> PULLPITOK_LIBSUNEC=$JAVA_HOME/jre/lib/amd64 ./pullpitoK python/peps
+or on macOS:
+ $> PULLPITOK_LIBSUNEC=$JAVA_HOME/jre/lib ./pullpitoK python/peps"

src/main/kotlin/pullpitok/App.kt

@@ -6,6 +6,7 @@ import pullpitok.github.EventClient
 import pullpitok.github.Type
 
 fun main(args: Array<String>) {
+    loadLibSunec()
 
     if (!checkArgs(args)) System.exit(0)
     val repo = args[0]
@@ -18,17 +19,16 @@ fun main(args: Array<String>) {
         if (events.isNotEmpty()) allEvents.addAll(events)
         else break
     }
-    println("""pull requests for "$repo" ->""")
-    val eventsPerAuthor = perAuthor(allEvents)
-
-    val opened: (Event) -> Boolean = { it.type == Type.PullRequestEvent.name && it.payload.action == Action.opened.name }
-    println("\n" + counters("opened per author", eventsPerAuthor, opened))
-
-    val commented: (Event) -> Boolean = { it.type == Type.PullRequestReviewCommentEvent.name && it.payload.action == Action.created.name }
-    println("\n" + counters("commented per author", eventsPerAuthor, commented))
+    displayEvents(repo, allEvents)
+}
 
-    val closed: (Event) -> Boolean = { it.type == Type.PullRequestEvent.name && it.payload.action == Action.closed.name }
-    println("\n" + counters("closed per author", eventsPerAuthor, closed))
+private fun loadLibSunec() {
+    val libSunec = System.getenv("PULLPITOK_LIBSUNEC")
+    if (libSunec != null && !libSunec.isEmpty()) {
+        System.setProperty("java.library.path", libSunec)
+    } else {
+        System.setProperty("java.library.path", System.getenv("JAVA_HOME"))
+    }
 }
 
 fun checkArgs(args: Array<String>): Boolean =
@@ -44,6 +44,20 @@ A command line tool to display a summary of GitHub pull requests.
             false
         } else true
 
+private fun displayEvents(repo: String, allEvents: MutableList<Event>) {
+    println("""pull requests for "$repo" ->""")
+    val eventsPerAuthor = perAuthor(allEvents)
+
+    val opened: (Event) -> Boolean = { it.type == Type.PullRequestEvent.name && it.payload.action == Action.opened.name }
+    println("\n" + counters("opened per author", eventsPerAuthor, opened))
+
+    val commented: (Event) -> Boolean = { it.type == Type.PullRequestReviewCommentEvent.name && it.payload.action == Action.created.name }
+    println("\n" + counters("commented per author", eventsPerAuthor, commented))
+
+    val closed: (Event) -> Boolean = { it.type == Type.PullRequestEvent.name && it.payload.action == Action.closed.name }
+    println("\n" + counters("closed per author", eventsPerAuthor, closed))
+}
+
 fun perAuthor(events: List<Event>): Map<String, List<Event>> = events
         .filter {
             it.type in Type.values().map(Type::name)