Add epicbox-scala/3 image

StepicOrg · Jun 22, 2021 · 1512058 · 1512058
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commit 1512058
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diff --git a/epicbox-scala/Dockerfile → epicbox-scala/2/Dockerfile b/epicbox-scala/Dockerfile → epicbox-scala/2/Dockerfile
diff --git a/epicbox-scala/java_lookup_main.sh → epicbox-scala/2/java_lookup_main.sh b/epicbox-scala/java_lookup_main.sh → epicbox-scala/2/java_lookup_main.sh
diff --git a/epicbox-scala/3/Dockerfile b/epicbox-scala/3/Dockerfile
@@ -0,0 +1,16 @@
+FROM openjdk:11.0.11-slim
+MAINTAINER Stepik Team <[email protected]>
+
+ENV SCALA_VERSION 3.0.0
+ENV PATH /opt/scala/bin:$PATH
+
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends wget && \
+    rm -rf /var/lib/apt/lists/* && \
+    wget -O - https://github.com/lampepfl/dotty/releases/download/$SCALA_VERSION/scala3-$SCALA_VERSION.tar.gz | tar xfz - -C /opt && \
+    mv /opt/scala3-$SCALA_VERSION /opt/scala
+
+COPY java_lookup_main.sh /usr/local/bin/java_lookup_main.sh
+RUN chmod +x /usr/local/bin/java_lookup_main.sh
+
+RUN useradd -M -d /sandbox sandbox
diff --git a/epicbox-scala/3/java_lookup_main.sh b/epicbox-scala/3/java_lookup_main.sh
@@ -0,0 +1,15 @@
+#!/bin/bash
+# Grep *.class files in the given directory to find one with psvm method defined
+# Usage: java_lookup_main.sh DIRECTORY_PATH
+
+PSVM_REGEX="public static( final)? void main\(java\.lang\.String(\[\]|\.\.\.)\)"
+
+shopt -s nullglob
+for f in "$1"/*.class; do
+    if javap -p "$f" 2> /dev/null | grep -Pq "$PSVM_REGEX"; then
+        filename=$(basename "$f")
+        echo -n "${filename%.*}"
+        exit 0
+    fi
+done
+exit 1