try to infer KOTLIN_HOME from context if missing (fixes #15)

kscript

@@ -187,6 +187,19 @@ fi
 #jar ufm ${jarFile} ${mainJava}.manimain
 #jar tf ${jarFile}
 
+
+# Infer KOTLIN_HOME from kotlinc if not set
+if [ -z "$KOTLIN_HOME" ]; then
+    KOTLIN_HOME="$(dirname $(which kotlinc))/.."
+fi
+
+## fail if KOTLIN_HOME is still unknown or does not exist
+if [ ! -d "$KOTLIN_HOME" ]; then
+    echo "ERROR: KOTLIN_HOME is not set and could not be inferred from context" >&2
+    exit 1;
+fi
+
+
 # http://stackoverflow.com/questions/3706689/java-class-files-in-current-directory
 # also see https://youtrack.jetbrains.com/issue/KT-17100
 exec kotlin ${kotlin_opts} -classpath ${jarFile}:${KOTLIN_HOME}/lib/kotlin-script-runtime.jar:"$classpath" Main_${className} "$@"

test/TestsReadme.md

@@ -18,19 +18,19 @@ To run the tests, just run the [`test_suite.sh`](test_suite.sh)
 export KSCRIPT_HOME="/Users/brandl/projects/kotlin/kscript"
 ## change into this/test directory
 
-cd ${KSCRIPT_HOME}
-
 ## make sure to use devel-version
 export PATH=${KSCRIPT_HOME}:${PATH}
 
+cd ${KSCRIPT_HOME}/test
+
 ## clean up the environment
-sdk use kotlin 1.1-RC
+#sdk use kotlin 1.1-RC
 kscript --clear-cache
 
 ./test_suite.sh
 
 # run again with kotlin 1.0.X
-sdk use kotlin 1.0.6
+#sdk use kotlin 1.0.6
 ./test_suite.sh
 
 

test/test_suite.sh

@@ -35,3 +35,10 @@ assert "kscript -i " "To create a shell with script dependencies run:\nkotlinc
 
 
 assert_end cli_helper_tests
+
+
+
+assert "unset KOTLIN_HOME; echo 'println(99)' | kscript -" "99"
+
+
+assert_end environment_tests