Merge branch 'en/rebase-against-rebase-fix' into maint

* en/rebase-against-rebase-fix:
  pull --rebase: Avoid spurious conflicts and reapplying unnecessary patches
  t5520-pull: Add testcases showing spurious conflicts from git pull --rebase

diff --git a/git-pull.sh b/git-pull.sh
index a09a44ec4ce3d82cebc5f972f09e94c7c35dc948..8eb74d45debe7ab2bd2cc9b5ed57b1ba49d94bdb 100755 (executable)
--- a/git-pull.sh
+++ b/git-pull.sh
@@ -273,6 +273,15 @@ then
        exit
 fi
 
+if test true = "$rebase"
+then
+       o=$(git show-branch --merge-base $curr_branch $merge_head $oldremoteref)
+       if test "$oldremoteref" = "$o"
+       then
+               unset oldremoteref
+       fi
+fi
+
 merge_name=$(git fmt-merge-msg $log_arg <"$GIT_DIR/FETCH_HEAD") || exit
 case "$rebase" in
 true)

diff --git a/t/t5520-pull.sh b/t/t5520-pull.sh
index 319e389ed0dbb9c920d8d619cdf94ab52145e9f4..0b489f5b1227268c050c1256d105d57d871f5698 100755 (executable)
--- a/t/t5520-pull.sh
+++ b/t/t5520-pull.sh
@@ -4,6 +4,11 @@ test_description='pulling into void'
 
 . ./test-lib.sh
 
+modify () {
+       sed -e "$1" <"$2" >"$2.x" &&
+       mv "$2.x" "$2"
+}
+
 D=`pwd`
 
 test_expect_success setup '
@@ -160,4 +165,61 @@ test_expect_success 'pull --rebase works on branch yet to be born' '
        test_cmp expect actual
 '
 
+test_expect_success 'setup for detecting upstreamed changes' '
+       mkdir src &&
+       (cd src &&
+        git init &&
+        printf "1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n" > stuff &&
+        git add stuff &&
+        git commit -m "Initial revision"
+       ) &&
+       git clone src dst &&
+       (cd src &&
+        modify s/5/43/ stuff &&
+        git commit -a -m "5->43" &&
+        modify s/6/42/ stuff &&
+        git commit -a -m "Make it bigger"
+       ) &&
+       (cd dst &&
+        modify s/5/43/ stuff &&
+        git commit -a -m "Independent discovery of 5->43"
+       )
+'
+
+test_expect_success 'git pull --rebase detects upstreamed changes' '
+       (cd dst &&
+        git pull --rebase &&
+        test -z "$(git ls-files -u)"
+       )
+'
+
+test_expect_success 'setup for avoiding reapplying old patches' '
+       (cd dst &&
+        test_might_fail git rebase --abort &&
+        git reset --hard origin/master
+       ) &&
+       git clone --bare src src-replace.git &&
+       rm -rf src &&
+       mv src-replace.git src &&
+       (cd dst &&
+        modify s/2/22/ stuff &&
+        git commit -a -m "Change 2" &&
+        modify s/3/33/ stuff &&
+        git commit -a -m "Change 3" &&
+        modify s/4/44/ stuff &&
+        git commit -a -m "Change 4" &&
+        git push &&
+
+        modify s/44/55/ stuff &&
+        git commit --amend -a -m "Modified Change 4"
+       )
+'
+
+test_expect_success 'git pull --rebase does not reapply old patches' '
+       (cd dst &&
+        test_must_fail git pull --rebase &&
+        test 1 = $(find .git/rebase-apply -name "000*" | wc -l)
+       )
+'
+
 test_done