[PATCH] New git-apply test cases for scanning forwards and backwards.

[git.git] / git-pull-script

diff --git a/git-pull-script b/git-pull-script
index 7016fbf..c31a65c 100755 (executable)
--- a/git-pull-script
+++ b/git-pull-script
@@ -5,7 +5,25 @@
 # Fetch one or more remote refs and merge it/them into the current HEAD.
 
 . git-sh-setup-script || die "Not a git archive"
-git-fetch-script "$@" || exit 1
+
+orig_head=$(cat "$GIT_DIR/HEAD") || die "Pulling into a black hole?"
+git-fetch-script --update-head-ok "$@" || exit 1
+
+curr_head=$(cat "$GIT_DIR/HEAD")
+if test "$curr_head" != "$orig_head"
+then
+       # The fetch involved updating the current branch.
+
+       # The working tree and the index file is still based on the
+       # $orig_head commit, but we are merging into $curr_head.
+       # First update the working tree to match $curr_head.
+
+       echo >&2 "Warning: fetch updated the current branch head."
+       echo >&2 "Warning: fast forwarding your working tree."
+       git-read-tree -u -m "$orig_head" "$curr_head" ||
+               die "You need to first update your working tree."
+fi
+
 merge_head=$(sed -e 's/        .*//' "$GIT_DIR"/FETCH_HEAD | tr '\012' ' ')
 merge_name=$(sed -e 's/^[0-9a-f]*      //' "$GIT_DIR"/FETCH_HEAD |
         tr '\012' ' ')