Add interlocks for move_to_xyz scripts.

Resolves #1317.

scripts/jenkins-test

@@ -37,18 +37,59 @@ then
     exit 1
 fi
 
+# this next line is supposed to fail
+set +e
+
+echo "Rewriting POM.xml files to Scala 2.10 and Spark 1 should error..."
+./scripts/move_to_spark_1.sh
+if [[ $? == 0 ]];
+then
+    echo "Moving to Spark 1 did not cowardly fail!"
+    exit 1
+fi
+
+./scripts/move_to_scala_2.10.sh
+if [[ $? == 0 ]];
+then
+    echo "Moving to Scala 2.10 did not cowardly fail!"
+    exit 1
+fi
+
+set -e
+
 # are we testing for spark 2.0.0? if so, we need to rewrite our poms first
 if [ ${SPARK_VERSION} == 2.0.0 ];
 then
-        echo "Rewriting POM.xml files for Scala 2.10."
-        ./scripts/move_to_spark_2.sh
+
+    echo "Rewriting POM.xml files for Spark 2."
+    ./scripts/move_to_spark_2.sh
+
+    # shouldn't be able to move to spark 2 twice
+    set +e
+    ./scripts/move_to_spark_2.sh
+    if [[ $? == 0 ]];
+    then
+        echo "Moving to Spark 2 twice did not cowardly fail!"
+        exit 1
+    fi
+    set -e
 fi
 
 # are we testing for scala 2.11? if so, we need to rewrite our poms to 2.11 first
 if [ ${SCALAVER} == 2.11 ];
 then
-        echo "Rewriting POM.xml files for Scala 2.10."
-        ./scripts/move_to_scala_2.11.sh
+    echo "Rewriting POM.xml files for Scala 2.11."
+    ./scripts/move_to_scala_2.11.sh
+
+    # shouldn't be able to move to scala 2.11 twice
+    set +e
+    ./scripts/move_to_scala_2.11.sh
+    if [[ $? == 0 ]];
+    then
+        echo "Moving to Scala 2.11 twice did not cowardly fail!"
+        exit 1
+    fi
+    set -e
 fi
 
 # print versions
@@ -77,6 +118,27 @@ mvn -U \
 find ${ADAM_MVN_TMP_DIR}
 rm -rf ${ADAM_MVN_TMP_DIR}
 
+# and move our poms back to their original values
+# this will allow us to pass our porcelain test at the end
+if [ ${SPARK_VERSION} == 2.0.0 ];
+then
+
+    echo "Rewriting POM.xml files back to Spark 1."
+    ./scripts/move_to_spark_1.sh
+fi
+if [ ${SCALAVER} == 2.11 ];
+then
+    echo "Rewriting POM.xml files back to Scala 2.10."
+    ./scripts/move_to_scala_2.10.sh
+fi
+
+if test -n "$(git status --porcelain)"
+then
+    echo "Applying move_to_xyz script marred a pom.xml file."
+    echo "Exiting..."
+    exit 1
+fi
+
 # run integration tests on scala 2.10; prebuilt spark distributions are not available for 2.11
 if [ ${SCALAVER} == 2.10 ];
 then
@@ -157,7 +219,6 @@ then
     # test that the source is formatted correctly
     # we had modified the poms to add a temp dir, so check those out first
     pushd ${PROJECT_ROOT}
-    find . -name pom.xml -exec git checkout {} \;
     ./scripts/format-source
     if test -n "$(git status --porcelain)"
     then

scripts/move_to_scala_2.10.sh

@@ -2,5 +2,17 @@
 
 set +x
 
-find . -name "pom.xml" -exec sed -e "s/2.11.8/2.10.6/g" -e "s/2.11/2.10/g" -i.2.10.bak '{}' \;
+grep "<scala\.version>" pom.xml | grep -q 2.10
+if [[ $? == 0 ]];
+then
+    echo "Scala version is already set to 2.10."
+    echo "Cowardly refusing to move to Scala 2.10..."
+
+    exit 1
+fi
+
+find . -name "pom.xml" -exec sed -e "s/2.11.8/2.10.6/g" \
+    -e "s/2.11/2.10/g" -i.2.10.bak \
+    -e "/no Scala/ s/Scala 2.10/Scala 2.11/g" -i.2.10.bak \
+    '{}' \;
 find . -name "*.2.10.bak" -exec rm {} \;

scripts/move_to_scala_2.11.sh

@@ -2,7 +2,18 @@
 
 set +x
 
-find . -name "pom.xml" -exec sed -e "s/2.10.6/2.11.8/g" -e "/bdg-utils.version/!s/2.10/2.11/g" -i.2.11.bak '{}' \;
+grep "<scala\.version>" pom.xml | grep -q 2.11
+if [[ $? == 0 ]];
+then
+    echo "Scala version is already set to 2.11."
+    echo "Cowardly refusing to move to Scala 2.11..."
+
+    exit 1
+fi
+
+find . -name "pom.xml" -exec sed -e "s/2.10.6/2.11.8/g" \
+    -e "/bdg-utils.version/! s/2.10/2.11/g" \
+    -i.2.11.bak '{}' \;
 # keep parquet-scala at parquet-scala_2.10
 find . -name "pom.xml" -exec sed -e "s/parquet-scala_2.11/parquet-scala_2.10/g" -i.2.11.2.bak '{}' \;
 # keep maven-javadoc-plugin at version 2.10.3

scripts/move_to_spark_1.sh

@@ -2,6 +2,15 @@
 
 set +x
 
+grep -q "spark2" pom.xml
+if [[ $? == 1 ]];
+then
+    echo "POM is already set up for Spark 1."
+    echo "Cowardly refusing to move to Spark 1..."
+
+    exit 1
+fi
+
 find . -name "pom.xml" -exec sed \
     -e "s/-spark2//g" \
     -e "/spark.version/ s/2.0.0/1.6.3/g" \

scripts/move_to_spark_2.sh

@@ -2,6 +2,15 @@
 
 set +x
 
+grep -q "spark2" pom.xml
+if [[ $? == 0 ]];
+then
+    echo "POM is already set up for Spark 2."
+    echo "Cowardly refusing to move to Spark 2..."
+
+    exit 1
+fi
+
 svp="\${scala.version.prefix}"
 substitution_cmd="s/_$svp/-spark2_$svp/g"