scripts/manage in rvm-1.0.15 vs scripts/manage in rvm-1.0.17

@@ -544,11 +544,11 @@
 
       __rvm_conditionally_add_bin_path ; export PATH
 
       builtin hash -r
 
-      if [[ -n "$(printf $rvm_ruby_version | awk '/^1\./')" \
+      if [[ -n "$(printf "${rvm_ruby_version:-""}" | awk '/^1\./')" \
         && ${rvm_head_flag:-0} -eq 0 ]] ; then
 
         "$rvm_path/scripts/log" "info" \
           "$rvm_ruby_string #downloading ($rvm_ruby_package_file), this may take a while depending on your connection..."
 
@@ -991,12 +991,12 @@
 
         mkdir -p "${rvm_src_path:-"$rvm_path/src"}/$rvm_ruby_string" "$rvm_ruby_home"
 
         unzip -o  -d "${rvm_src_path:-"$rvm_path/src"}/$rvm_ruby_string" \
           "${rvm_archives_path:-"$rvm_path/archives"}/${rvm_ruby_package_file}" >> \
-          "${rvm_log_path:-"$rvm_path/log"}$rvm_ruby_string/extract.log" 2>> \
-          "${rvm_log_path:-"$rvm_path/log"}$rvm_ruby_string/extract.error.log"
+          "${rvm_log_path:-"$rvm_path/log"}/$rvm_ruby_string/extract.log" 2>> \
+          "${rvm_log_path:-"$rvm_path/log"}/$rvm_ruby_string/extract.error.log"
         result=$?
 
         if [[ "$result" -gt 1 ]] ; then
 
           "$rvm_path/scripts/log" "error" \
@@ -1350,11 +1350,11 @@
     return 0
   else
 
     mkdir -p "${rvm_repo_path:-"$rvm_path/repos"}"
 
-    if [[ -n "$(echo "$rvm_ruby_url" | awk '/^git/')" ]] ; then
+    if [[ -n "$(echo "$rvm_ruby_url" | awk '/git/')" ]] ; then
 
       if [[ -d "${rvm_repos_path:-"$rvm_path/repos"}/$rvm_ruby_string/.git" ]] ; then
 
         builtin cd "${rvm_repos_path:-"$rvm_path/repos"}/$rvm_ruby_string"
 
@@ -1416,9 +1416,34 @@
               \nHalting the installation."
             return $result
           fi
         fi
       fi
+
+      if [[ -z "$rvm_ruby_repo_branch" ]]; then
+        rvm_ruby_repo_branch="master"
+      fi
+
+      (
+        remote="origin"
+
+        cd "${rvm_repos_path:-"$rvm_path/repos"}/$rvm_ruby_string"
+
+        if [[ -z "$(git branch | awk "/$rvm_ruby_repo_branch$/")" ]] ; then
+
+          git checkout -b "$rvm_ruby_repo_branch" --track "$remote/$rvm_ruby_repo_branch" 2>/dev/null
+
+        elif [[ -z "$(git branch | awk "/\* $rvm_ruby_repo_branch$/")" ]] ; then
+
+          if ! git checkout $rvm_ruby_repo_branch 2>/dev/null ; then
+
+            "$rvm_path/scripts/log" "error" \
+              "Branch $remote/$rvm_ruby_repo_branch not found."
+
+          fi
+
+        fi
+      )
 
     else
       if [[ -n "${rvm_ruby_tag:-""}" ]] ; then
         # TODO: Check if tag v is valid
         rvm_ruby_url="${rvm_ruby_url:-"$rvm_ruby_repo_url/tags/$(echo "$rvm_ruby_tag" | sed 's/^t//')"}"