xdiff/xpatience: factor out fall-back-diff function
[gitweb.git] / git-sh-setup.sh
index ae031a1375e9c674d80b9fa3d3d3b76780deaf9f..94e26ed5e8dcf84c4f238c76b6c508dc84d0b7ea 100644 (file)
@@ -140,11 +140,47 @@ cd_to_toplevel () {
        }
 }
 
+require_work_tree_exists () {
+       if test "z$(git rev-parse --is-bare-repository)" != zfalse
+       then
+               die "fatal: $0 cannot be used without a working tree."
+       fi
+}
+
 require_work_tree () {
        test "$(git rev-parse --is-inside-work-tree 2>/dev/null)" = true ||
        die "fatal: $0 cannot be used without a working tree."
 }
 
+require_clean_work_tree () {
+       git rev-parse --verify HEAD >/dev/null || exit 1
+       git update-index -q --ignore-submodules --refresh
+       err=0
+
+       if ! git diff-files --quiet --ignore-submodules
+       then
+               echo >&2 "Cannot $1: You have unstaged changes."
+               err=1
+       fi
+
+       if ! git diff-index --cached --quiet --ignore-submodules HEAD --
+       then
+               if [ $err = 0 ]
+               then
+                   echo >&2 "Cannot $1: Your index contains uncommitted changes."
+               else
+                   echo >&2 "Additionally, your index contains uncommitted changes."
+               fi
+               err=1
+       fi
+
+       if [ $err = 1 ]
+       then
+               test -n "$2" && echo >&2 "$2"
+               exit 1
+       fi
+}
+
 get_author_ident_from_commit () {
        pick_author_script='
        /^author /{