pkg(scala-3.0.0): use compile (#257)

packages/scala/3.0.0/build.sh

@@ -1,16 +1,11 @@
 #!/usr/bin/env bash
 
-# Scala depends on Java
-mkdir -p java
-cd java
-curl "https://download.java.net/java/GA/jdk15.0.2/0d1cfde4252546c6931946de8db48ee2/7/GPL/openjdk-15.0.2_linux-x64_bin.tar.gz" -o java.tar.gz
-tar xzf java.tar.gz --strip-components=1
-rm java.tar.gz
-cd ..
+# Download and extract JDK8
+curl -L "https://github.com/AdoptOpenJDK/openjdk8-binaries/releases/download/jdk8u292-b10/OpenJDK8U-jdk_x64_linux_hotspot_8u292b10.tar.gz" -o jdk.tar.gz
+tar xzf jdk.tar.gz --strip-components=1
+rm jdk.tar.gz
 
-mkdir -p scala
-cd scala
-curl -L "https://github.com/lampepfl/dotty/releases/download/3.0.0-RC1/scala3-3.0.0-RC1.tar.gz" -o scala.tar.gz
+# Download and extract Scala 3
+curl -L "https://github.com/lampepfl/dotty/releases/download/3.0.0/scala3-3.0.0.tar.gz" -o scala.tar.gz
 tar -xzf scala.tar.gz --strip-components=1
 rm scala.tar.gz
-cd ..

packages/scala/3.0.0/compile

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+
+# Compile scala classes into a jar file
+scalac "$@" -d out.jar
+
+# Create the Manifest and include scala lib jars:
+# NOTE: - entry point will only consider @main and App traits from the main file
+#       - scala lib jars will be added to the class path in order to run the jar properly
+echo "Main-Class: $(grep -oP '\@main\s+def\s+\K[a-zA-Z][a-zA-Z0-9]*|object\s+\K[a-zA-Z][a-zA-Z0-9]*(?=\s+extends\s+App)' $1)
+Class-Path:  $(echo $JAVA_HOME/lib/*.jar | sed 's/\s/\n  /g')
+
+" > manifest.txt
+
+# Update the jar with the manifest
+jar ufm out.jar manifest.txt

packages/scala/3.0.0/environment

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
 
 # Scala requires JAVA_HOME to be set
-export JAVA_HOME=$PWD/java
-export PATH=$PWD/scala/bin:$PATH
+export JAVA_HOME=$PWD
+export PATH=$PWD/bin:$PATH

packages/scala/3.0.0/metadata.json

@@ -1,5 +1,5 @@
 {
     "language": "scala",
     "version": "3.0.0",
-    "aliases": ["scala", "sc"]
+    "aliases": ["sc"]
 }

packages/scala/3.0.0/run

@@ -1,7 +1,5 @@
 #!/usr/bin/env bash
 
-# Put instructions to run the runtime
-mv $1 $1.scala
-filename=$1.scala
+# Run jar file
 shift
-scala $filename "$@"
+java -jar out.jar "$@"