make docs.sh able to use svn or git to restore files

git-svn-id: https://pmd.svn.sourceforge.net/svnroot/pmd/branches/pmd/4.2.x@7244 51baf565-9d33-0410-a72c-fc3788e3496d

pmd/docs.sh

@@ -1,5 +1,18 @@
 #!/bin/bash
 
+restore_from_repository() {
+    local dir="${1}"
+
+    git status "${dir}"
+    local status="${?}"
+    if [ ${status} -eq 0 ]; then
+        git reset HEAD "${dir}"
+        git checkout "${dir}"
+    else
+        svn up "${dir}"
+    fi
+}
+
 option="${1}"
 
 if [ -z $option ]; then
@@ -8,7 +21,7 @@ if [ -z $option ]; then
   maven -qb pmd:rulesets-index xdoc:generate-from-pom
   maven -qb pmd:ruleset-docs
   rm -f rulesets/*.xml
-  svn up rulesets
+  restore_from_repository rulesets
   maven -qb xdoc:transform
 elif [ $option = "all" ]; then
   echo "Running maven site"
@@ -16,7 +29,8 @@ elif [ $option = "all" ]; then
   ruby munge_rulesets.rb
   maven -qb site
   rm -f rulesets/*.xml
-  svn up rulesets
+  restore_from_repository rulesets
+  maven -qb xdoc:transform
 elif [ $option = "uploadcurrent" ]; then
   echo "Generating and uploading maven artifacts"
   mvn -q source:jar javadoc:jar deploy
@@ -26,7 +40,7 @@ elif [ $option = "uploadcurrent" ]; then
   maven -qb pmd:rulesets-index xdoc:generate-from-pom
   maven -qb pmd:ruleset-docs
   rm -f rulesets/*.xml
-  svn up rulesets
+  restore_from_repository rulesets
   maven -qb xdoc:transform
   DOCS_FILE=docs.tar.gz
   cp xdocs/cpdresults.txt xdocs/cpp_cpdresults.txt target/docs/