diff options
| -rw-r--r-- | builtin/merge.c | 57 | ||||
| -rwxr-xr-x | git-merge-resolve.sh | 10 | ||||
| -rw-r--r-- | merge-ort-wrappers.c | 4 | ||||
| -rwxr-xr-x | t/t6402-merge-rename.sh | 2 | ||||
| -rwxr-xr-x | t/t6424-merge-unrelated-index-changes.sh | 65 | ||||
| -rwxr-xr-x | t/t6439-merge-co-error-msgs.sh | 1 | ||||
| -rwxr-xr-x | t/t7607-merge-state.sh | 32 |
7 files changed, 154 insertions, 17 deletions
diff --git a/builtin/merge.c b/builtin/merge.c index 23170f2d2a..f7c92c0e64 100644 --- a/builtin/merge.c +++ b/builtin/merge.c @@ -313,8 +313,16 @@ static int save_state(struct object_id *stash) int len; struct child_process cp = CHILD_PROCESS_INIT; struct strbuf buffer = STRBUF_INIT; + struct lock_file lock_file = LOCK_INIT; + int fd; int rc = -1; + fd = repo_hold_locked_index(the_repository, &lock_file, 0); + refresh_cache(REFRESH_QUIET); + if (0 <= fd) + repo_update_index_if_able(the_repository, &lock_file); + rollback_lock_file(&lock_file); + strvec_pushl(&cp.args, "stash", "create", NULL); cp.out = -1; cp.git_cmd = 1; @@ -375,22 +383,26 @@ static void reset_hard(const struct object_id *oid, int verbose) static void restore_state(const struct object_id *head, const struct object_id *stash) { - const char *args[] = { "stash", "apply", NULL, NULL }; - - if (is_null_oid(stash)) - return; + struct strvec args = STRVEC_INIT; reset_hard(head, 1); - args[2] = oid_to_hex(stash); + if (is_null_oid(stash)) + goto refresh_cache; + + strvec_pushl(&args, "stash", "apply", "--index", "--quiet", NULL); + strvec_push(&args, oid_to_hex(stash)); /* * It is OK to ignore error here, for example when there was * nothing to restore. */ - run_command_v_opt(args, RUN_GIT_CMD); + run_command_v_opt(args.v, RUN_GIT_CMD); + strvec_clear(&args); - refresh_cache(REFRESH_QUIET); +refresh_cache: + if (discard_cache() < 0 || read_cache() < 0) + die(_("could not read index")); } /* This is called when no merge was necessary. */ @@ -754,8 +766,10 @@ static int try_merge_strategy(const char *strategy, struct commit_list *common, else clean = merge_recursive(&o, head, remoteheads->item, reversed, &result); - if (clean < 0) - exit(128); + if (clean < 0) { + rollback_lock_file(&lock); + return 2; + } if (write_locked_index(&the_index, &lock, COMMIT_LOCK | SKIP_IF_UNCHANGED)) die(_("unable to write %s"), get_index_file()); @@ -1599,6 +1613,21 @@ int cmd_merge(int argc, const char **argv, const char *prefix) */ refresh_cache(REFRESH_QUIET); if (allow_trivial && fast_forward != FF_ONLY) { + /* + * Must first ensure that index matches HEAD before + * attempting a trivial merge. + */ + struct tree *head_tree = get_commit_tree(head_commit); + struct strbuf sb = STRBUF_INIT; + + if (repo_index_has_changes(the_repository, head_tree, + &sb)) { + error(_("Your local changes to the following files would be overwritten by merge:\n %s"), + sb.buf); + strbuf_release(&sb); + return 2; + } + /* See if it is really trivial. */ git_committer_info(IDENT_STRICT); printf(_("Trying really trivial in-index merge...\n")); @@ -1655,12 +1684,12 @@ int cmd_merge(int argc, const char **argv, const char *prefix) * tree in the index -- this means that the index must be in * sync with the head commit. The strategies are responsible * to ensure this. + * + * Stash away the local changes so that we can try more than one + * and/or recover from merge strategies bailing while leaving the + * index and working tree polluted. */ - if (use_strategies_nr == 1 || - /* - * Stash away the local changes so that we can try more than one. - */ - save_state(&stash)) + if (save_state(&stash)) oidclr(&stash); for (i = 0; !merge_was_ok && i < use_strategies_nr; i++) { diff --git a/git-merge-resolve.sh b/git-merge-resolve.sh index 343fe7bccd..77e93121bf 100755 --- a/git-merge-resolve.sh +++ b/git-merge-resolve.sh @@ -5,6 +5,16 @@ # # Resolve two trees, using enhanced multi-base read-tree. +. git-sh-setup + +# Abort if index does not match HEAD +if ! git diff-index --quiet --cached HEAD -- +then + gettextln "Error: Your local changes to the following files would be overwritten by merge" + git diff-index --cached --name-only HEAD -- | sed -e 's/^/ /' + exit 2 +fi + # The first parameters up to -- are merge bases; the rest are heads. bases= head= remotes= sep_seen= for arg diff --git a/merge-ort-wrappers.c b/merge-ort-wrappers.c index ad04106169..748924a69b 100644 --- a/merge-ort-wrappers.c +++ b/merge-ort-wrappers.c @@ -10,8 +10,8 @@ static int unclean(struct merge_options *opt, struct tree *head) struct strbuf sb = STRBUF_INIT; if (head && repo_index_has_changes(opt->repo, head, &sb)) { - fprintf(stderr, _("Your local changes to the following files would be overwritten by merge:\n %s"), - sb.buf); + error(_("Your local changes to the following files would be overwritten by merge:\n %s"), + sb.buf); strbuf_release(&sb); return -1; } diff --git a/t/t6402-merge-rename.sh b/t/t6402-merge-rename.sh index 3a32b1a45c..772238e582 100755 --- a/t/t6402-merge-rename.sh +++ b/t/t6402-merge-rename.sh @@ -210,7 +210,7 @@ test_expect_success 'updated working tree file should prevent the merge' ' echo >>M one line addition && cat M >M.saved && git update-index M && - test_expect_code 128 git pull --no-rebase . yellow && + test_expect_code 2 git pull --no-rebase . yellow && test_cmp M M.saved && rm -f M.saved ' diff --git a/t/t6424-merge-unrelated-index-changes.sh b/t/t6424-merge-unrelated-index-changes.sh index b6e424a427..a61f20c22f 100755 --- a/t/t6424-merge-unrelated-index-changes.sh +++ b/t/t6424-merge-unrelated-index-changes.sh @@ -114,6 +114,39 @@ test_expect_success 'resolve, non-trivial' ' test_path_is_missing .git/MERGE_HEAD ' +test_expect_success 'resolve, trivial, related file removed' ' + git reset --hard && + git checkout B^0 && + + git rm a && + test_path_is_missing a && + + test_must_fail git merge -s resolve C^0 && + + test_path_is_missing a && + test_path_is_missing .git/MERGE_HEAD +' + +test_expect_success 'resolve, non-trivial, related file removed' ' + git reset --hard && + git checkout B^0 && + + git rm a && + test_path_is_missing a && + + # We also ask for recursive in order to turn off the "allow_trivial" + # setting in builtin/merge.c, and ensure that resolve really does + # correctly fail the merge (I guess this also tests that recursive + # correctly fails the merge, but the main thing we are attempting + # to test here is resolve and are just using the side effect of + # adding recursive to ensure that resolve is actually tested rather + # than the trivial merge codepath) + test_must_fail git merge -s resolve -s recursive D^0 && + + test_path_is_missing a && + test_path_is_missing .git/MERGE_HEAD +' + test_expect_success 'recursive' ' git reset --hard && git checkout B^0 && @@ -242,4 +275,36 @@ test_expect_success 'subtree' ' test_path_is_missing .git/MERGE_HEAD ' +test_expect_success 'avoid failure due to stat-dirty files' ' + git reset --hard && + git checkout B^0 && + + # Make "a" be stat-dirty + test-tool chmtime =+1 a && + + # stat-dirty file should not prevent stash creation in builtin/merge.c + git merge -s resolve -s recursive D^0 +' + +test_expect_success 'with multiple strategies, recursive or ort failure do not early abort' ' + git reset --hard && + git checkout B^0 && + + test_seq 0 10 >a && + git add a && + git rev-parse :a >expect && + + sane_unset GIT_TEST_MERGE_ALGORITHM && + test_must_fail git merge -s recursive -s ort -s octopus C^0 >output 2>&1 && + + grep "Trying merge strategy recursive..." output && + grep "Trying merge strategy ort..." output && + grep "Trying merge strategy octopus..." output && + grep "No merge strategy handled the merge." output && + + # Changes to "a" should remain staged + git rev-parse :a >actual && + test_cmp expect actual +' + test_done diff --git a/t/t6439-merge-co-error-msgs.sh b/t/t6439-merge-co-error-msgs.sh index 5bfb027099..52cf0c8769 100755 --- a/t/t6439-merge-co-error-msgs.sh +++ b/t/t6439-merge-co-error-msgs.sh @@ -47,6 +47,7 @@ test_expect_success 'untracked files overwritten by merge (fast and non-fast for export GIT_MERGE_VERBOSITY && test_must_fail git merge branch 2>out2 ) && + echo "Merge with strategy ${GIT_TEST_MERGE_ALGORITHM:-ort} failed." >>expect && test_cmp out2 expect && git reset --hard HEAD^ ' diff --git a/t/t7607-merge-state.sh b/t/t7607-merge-state.sh new file mode 100755 index 0000000000..89a62ac53b --- /dev/null +++ b/t/t7607-merge-state.sh @@ -0,0 +1,32 @@ +#!/bin/sh + +test_description="Test that merge state is as expected after failed merge" + +GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main +export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME +. ./test-lib.sh + +test_expect_success 'Ensure we restore original state if no merge strategy handles it' ' + test_commit --no-tag "Initial" base base && + + for b in branch1 branch2 branch3 + do + git checkout -b $b main && + test_commit --no-tag "Change on $b" base $b || return 1 + done && + + git checkout branch1 && + # This is a merge that octopus cannot handle. Note, that it does not + # just hit conflicts, it completely fails and says that it cannot + # handle this type of merge. + test_expect_code 2 git merge branch2 branch3 >output 2>&1 && + grep "fatal: merge program failed" output && + grep "Should not be doing an octopus" output && + + # Make sure we did not leave stray changes around when no appropriate + # merge strategy was found + git diff --exit-code --name-status && + test_path_is_missing .git/MERGE_HEAD +' + +test_done |