diff options
| -rw-r--r-- | Documentation/git-merge.txt | 6 | ||||
| -rw-r--r-- | builtin/am.c | 7 | ||||
| -rw-r--r-- | cache.h | 16 | ||||
| -rw-r--r-- | merge-recursive.c | 14 | ||||
| -rw-r--r-- | merge.c | 31 | ||||
| -rw-r--r-- | read-cache.c | 40 | ||||
| -rwxr-xr-x | t/t6044-merge-unrelated-index-changes.sh | 67 | ||||
| -rwxr-xr-x | t/t7504-commit-msg-hook.sh | 4 | ||||
| -rwxr-xr-x | t/t7611-merge-abort.sh | 118 |
9 files changed, 124 insertions, 179 deletions
diff --git a/Documentation/git-merge.txt b/Documentation/git-merge.txt index 537dca7faa..eb36837f86 100644 --- a/Documentation/git-merge.txt +++ b/Documentation/git-merge.txt @@ -130,9 +130,9 @@ merge' may need to update. To avoid recording unrelated changes in the merge commit, 'git pull' and 'git merge' will also abort if there are any changes -registered in the index relative to the `HEAD` commit. (One -exception is when the changed index entries are in the state that -would result from the merge already.) +registered in the index relative to the `HEAD` commit. (Special +narrow exceptions to this rule may exist depending on which merge +strategy is in use, but generally, the index must match HEAD.) If all named commits are already ancestors of `HEAD`, 'git merge' will exit early with the message "Already up to date." diff --git a/builtin/am.c b/builtin/am.c index b6eeb46c4b..2c19e69f58 100644 --- a/builtin/am.c +++ b/builtin/am.c @@ -1766,7 +1766,7 @@ static void am_run(struct am_state *state, int resume) refresh_and_write_cache(); - if (index_has_changes(&sb)) { + if (index_has_changes(&the_index, NULL, &sb)) { write_state_bool(state, "dirtyindex", 1); die(_("Dirty index: cannot apply patches (dirty: %s)"), sb.buf); } @@ -1823,7 +1823,8 @@ static void am_run(struct am_state *state, int resume) * Applying the patch to an earlier tree and merging * the result may have produced the same tree as ours. */ - if (!apply_status && !index_has_changes(NULL)) { + if (!apply_status && + !index_has_changes(&the_index, NULL, NULL)) { say(state, stdout, _("No changes -- Patch already applied.")); goto next; } @@ -1877,7 +1878,7 @@ static void am_resolve(struct am_state *state) say(state, stdout, _("Applying: %.*s"), linelen(state->msg), state->msg); - if (!index_has_changes(NULL)) { + if (!index_has_changes(&the_index, NULL, NULL)) { printf_ln(_("No changes - did you forget to use 'git add'?\n" "If there is nothing left to stage, chances are that something else\n" "already introduced the same changes; you might want to skip this patch.")); @@ -220,6 +220,7 @@ struct cache_entry { /* Forward structure decls */ struct pathspec; struct child_process; +struct tree; /* * Copy the sha1 and stat state of a cache entry from one to @@ -696,12 +697,15 @@ extern void move_index_extensions(struct index_state *dst, struct index_state *s extern int unmerged_index(const struct index_state *); /** - * Returns 1 if the index differs from HEAD, 0 otherwise. When on an unborn - * branch, returns 1 if there are entries in the index, 0 otherwise. If an - * strbuf is provided, the space-separated list of files that differ will be - * appended to it. - */ -extern int index_has_changes(struct strbuf *sb); + * Returns 1 if istate differs from tree, 0 otherwise. If tree is NULL, + * compares istate to HEAD. If tree is NULL and on an unborn branch, + * returns 1 if there are entries in istate, 0 otherwise. If an strbuf is + * provided, the space-separated list of files that differ will be appended + * to it. + */ +extern int index_has_changes(const struct index_state *istate, + struct tree *tree, + struct strbuf *sb); extern int verify_path(const char *path, unsigned mode); extern int strcmp_offset(const char *s1, const char *s2, size_t *first_change); diff --git a/merge-recursive.c b/merge-recursive.c index 07d792fd10..1446e92bea 100644 --- a/merge-recursive.c +++ b/merge-recursive.c @@ -3281,6 +3281,13 @@ int merge_trees(struct merge_options *o, struct tree **result) { int code, clean; + struct strbuf sb = STRBUF_INIT; + + if (!o->call_depth && index_has_changes(&the_index, head, &sb)) { + err(o, _("Your local changes to the following files would be overwritten by merge:\n %s"), + sb.buf); + return -1; + } if (o->subtree_shift) { merge = shift_tree_object(head, merge, o->subtree_shift); @@ -3288,13 +3295,6 @@ int merge_trees(struct merge_options *o, } if (oid_eq(&common->object.oid, &merge->object.oid)) { - struct strbuf sb = STRBUF_INIT; - - if (!o->call_depth && index_has_changes(&sb)) { - err(o, _("Dirty index: cannot merge (dirty: %s)"), - sb.buf); - return 0; - } output(o, 0, _("Already up to date!")); *result = head; return 1; @@ -14,37 +14,6 @@ static const char *merge_argument(struct commit *commit) return oid_to_hex(commit ? &commit->object.oid : the_hash_algo->empty_tree); } -int index_has_changes(struct strbuf *sb) -{ - struct object_id head; - int i; - - if (!get_oid_tree("HEAD", &head)) { - struct diff_options opt; - - diff_setup(&opt); - opt.flags.exit_with_status = 1; - if (!sb) - opt.flags.quick = 1; - do_diff_cache(&head, &opt); - diffcore_std(&opt); - for (i = 0; sb && i < diff_queued_diff.nr; i++) { - if (i) - strbuf_addch(sb, ' '); - strbuf_addstr(sb, diff_queued_diff.queue[i]->two->path); - } - diff_flush(&opt); - return opt.flags.has_changes != 0; - } else { - for (i = 0; sb && i < active_nr; i++) { - if (i) - strbuf_addch(sb, ' '); - strbuf_addstr(sb, active_cache[i]->name); - } - return !!active_nr; - } -} - int try_merge_command(const char *strategy, size_t xopts_nr, const char **xopts, struct commit_list *common, const char *head_arg, struct commit_list *remotes) diff --git a/read-cache.c b/read-cache.c index 56eac50836..880849fc8a 100644 --- a/read-cache.c +++ b/read-cache.c @@ -6,6 +6,8 @@ #define NO_THE_INDEX_COMPATIBILITY_MACROS #include "cache.h" #include "config.h" +#include "diff.h" +#include "diffcore.h" #include "tempfile.h" #include "lockfile.h" #include "cache-tree.h" @@ -2120,6 +2122,44 @@ int unmerged_index(const struct index_state *istate) return 0; } +int index_has_changes(const struct index_state *istate, + struct tree *tree, + struct strbuf *sb) +{ + struct object_id cmp; + int i; + + if (istate != &the_index) { + BUG("index_has_changes cannot yet accept istate != &the_index; do_diff_cache needs updating first."); + } + if (tree) + cmp = tree->object.oid; + if (tree || !get_oid_tree("HEAD", &cmp)) { + struct diff_options opt; + + diff_setup(&opt); + opt.flags.exit_with_status = 1; + if (!sb) + opt.flags.quick = 1; + do_diff_cache(&cmp, &opt); + diffcore_std(&opt); + for (i = 0; sb && i < diff_queued_diff.nr; i++) { + if (i) + strbuf_addch(sb, ' '); + strbuf_addstr(sb, diff_queued_diff.queue[i]->two->path); + } + diff_flush(&opt); + return opt.flags.has_changes != 0; + } else { + for (i = 0; sb && i < istate->cache_nr; i++) { + if (i) + strbuf_addch(sb, ' '); + strbuf_addstr(sb, istate->cache[i]->name); + } + return !!istate->cache_nr; + } +} + #define WRITE_BUFFER_SIZE 8192 static unsigned char write_buffer[WRITE_BUFFER_SIZE]; static unsigned long write_buffer_len; diff --git a/t/t6044-merge-unrelated-index-changes.sh b/t/t6044-merge-unrelated-index-changes.sh index 23b86fb977..5e3779ebc9 100755 --- a/t/t6044-merge-unrelated-index-changes.sh +++ b/t/t6044-merge-unrelated-index-changes.sh @@ -82,7 +82,8 @@ test_expect_success 'ff update, important file modified' ' touch subdir/e && git add subdir/e && - test_must_fail git merge E^0 + test_must_fail git merge E^0 && + test_path_is_missing .git/MERGE_HEAD ' test_expect_success 'resolve, trivial' ' @@ -91,7 +92,8 @@ test_expect_success 'resolve, trivial' ' touch random_file && git add random_file && - test_must_fail git merge -s resolve C^0 + test_must_fail git merge -s resolve C^0 && + test_path_is_missing .git/MERGE_HEAD ' test_expect_success 'resolve, non-trivial' ' @@ -100,7 +102,8 @@ test_expect_success 'resolve, non-trivial' ' touch random_file && git add random_file && - test_must_fail git merge -s resolve D^0 + test_must_fail git merge -s resolve D^0 && + test_path_is_missing .git/MERGE_HEAD ' test_expect_success 'recursive' ' @@ -109,7 +112,8 @@ test_expect_success 'recursive' ' touch random_file && git add random_file && - test_must_fail git merge -s recursive C^0 + test_must_fail git merge -s recursive C^0 && + test_path_is_missing .git/MERGE_HEAD ' test_expect_success 'recursive, when merge branch matches merge base' ' @@ -118,7 +122,45 @@ test_expect_success 'recursive, when merge branch matches merge base' ' touch random_file && git add random_file && - test_must_fail git merge -s recursive F^0 + test_must_fail git merge -s recursive F^0 && + test_path_is_missing .git/MERGE_HEAD +' + +test_expect_success 'merge-recursive, when index==head but head!=HEAD' ' + git reset --hard && + git checkout C^0 && + + # Make index match B + git diff C B -- | git apply --cached && + # Merge B & F, with B as "head" + git merge-recursive A -- B F > out && + test_i18ngrep "Already up to date" out +' + +test_expect_success 'recursive, when file has staged changes not matching HEAD nor what a merge would give' ' + git reset --hard && + git checkout B^0 && + + mkdir subdir && + test_seq 1 10 >subdir/a && + git add subdir/a && + + # We have staged changes; merge should error out + test_must_fail git merge -s recursive E^0 2>err && + test_i18ngrep "changes to the following files would be overwritten" err +' + +test_expect_success 'recursive, when file has staged changes matching what a merge would give' ' + git reset --hard && + git checkout B^0 && + + mkdir subdir && + test_seq 1 11 >subdir/a && + git add subdir/a && + + # We have staged changes; merge should error out + test_must_fail git merge -s recursive E^0 2>err && + test_i18ngrep "changes to the following files would be overwritten" err ' test_expect_success 'octopus, unrelated file touched' ' @@ -127,7 +169,8 @@ test_expect_success 'octopus, unrelated file touched' ' touch random_file && git add random_file && - test_must_fail git merge C^0 D^0 + test_must_fail git merge C^0 D^0 && + test_path_is_missing .git/MERGE_HEAD ' test_expect_success 'octopus, related file removed' ' @@ -136,7 +179,8 @@ test_expect_success 'octopus, related file removed' ' git rm b && - test_must_fail git merge C^0 D^0 + test_must_fail git merge C^0 D^0 && + test_path_is_missing .git/MERGE_HEAD ' test_expect_success 'octopus, related file modified' ' @@ -145,7 +189,8 @@ test_expect_success 'octopus, related file modified' ' echo 12 >>a && git add a && - test_must_fail git merge C^0 D^0 + test_must_fail git merge C^0 D^0 && + test_path_is_missing .git/MERGE_HEAD ' test_expect_success 'ours' ' @@ -154,7 +199,8 @@ test_expect_success 'ours' ' touch random_file && git add random_file && - test_must_fail git merge -s ours C^0 + test_must_fail git merge -s ours C^0 && + test_path_is_missing .git/MERGE_HEAD ' test_expect_success 'subtree' ' @@ -163,7 +209,8 @@ test_expect_success 'subtree' ' touch random_file && git add random_file && - test_must_fail git merge -s subtree E^0 + test_must_fail git merge -s subtree E^0 && + test_path_is_missing .git/MERGE_HEAD ' test_done diff --git a/t/t7504-commit-msg-hook.sh b/t/t7504-commit-msg-hook.sh index 302a3a2082..31b9c6a2c1 100755 --- a/t/t7504-commit-msg-hook.sh +++ b/t/t7504-commit-msg-hook.sh @@ -157,6 +157,7 @@ test_expect_success 'merge bypasses failing hook with --no-verify' ' test_when_finished "git branch -D newbranch" && test_when_finished "git checkout -f master" && git checkout --orphan newbranch && + git rm -f file && : >file2 && git add file2 && git commit --no-verify file2 -m in-side-branch && @@ -168,7 +169,7 @@ test_expect_success 'merge bypasses failing hook with --no-verify' ' chmod -x "$HOOK" test_expect_success POSIXPERM 'with non-executable hook' ' - echo "content" >> file && + echo "content" >file && git add file && git commit -m "content" @@ -249,6 +250,7 @@ test_expect_success 'hook called in git-merge picks up commit message' ' test_when_finished "git branch -D newbranch" && test_when_finished "git checkout -f master" && git checkout --orphan newbranch && + git rm -f file && : >file2 && git add file2 && git commit --no-verify file2 -m in-side-branch && diff --git a/t/t7611-merge-abort.sh b/t/t7611-merge-abort.sh index 7b4798e8e4..7c84a518aa 100755 --- a/t/t7611-merge-abort.sh +++ b/t/t7611-merge-abort.sh @@ -187,31 +187,6 @@ test_expect_success 'Fail clean merge with matching dirty worktree' ' test_cmp expect actual ' -test_expect_success 'Abort clean merge with matching dirty index' ' - git add bar && - git diff --staged > expect && - git merge --no-commit clean_branch && - test -f .git/MERGE_HEAD && - ### When aborting the merge, git will discard all staged changes, - ### including those that were staged pre-merge. In other words, - ### --abort will LOSE any staged changes (the staged changes that - ### are lost must match the merge result, or the merge would not - ### have been allowed to start). Change expectations accordingly: - rm expect && - touch expect && - # Abort merge - git merge --abort && - test ! -f .git/MERGE_HEAD && - test "$pre_merge_head" = "$(git rev-parse HEAD)" && - git diff --staged > actual && - test_cmp expect actual && - test -z "$(git diff)" -' - -test_expect_success 'Reset worktree changes' ' - git reset --hard "$pre_merge_head" -' - test_expect_success 'Fail conflicting merge with matching dirty worktree' ' echo barf > bar && git diff > expect && @@ -223,97 +198,4 @@ test_expect_success 'Fail conflicting merge with matching dirty worktree' ' test_cmp expect actual ' -test_expect_success 'Abort conflicting merge with matching dirty index' ' - git add bar && - git diff --staged > expect && - test_must_fail git merge conflict_branch && - test -f .git/MERGE_HEAD && - ### When aborting the merge, git will discard all staged changes, - ### including those that were staged pre-merge. In other words, - ### --abort will LOSE any staged changes (the staged changes that - ### are lost must match the merge result, or the merge would not - ### have been allowed to start). Change expectations accordingly: - rm expect && - touch expect && - # Abort merge - git merge --abort && - test ! -f .git/MERGE_HEAD && - test "$pre_merge_head" = "$(git rev-parse HEAD)" && - git diff --staged > actual && - test_cmp expect actual && - test -z "$(git diff)" -' - -test_expect_success 'Reset worktree changes' ' - git reset --hard "$pre_merge_head" -' - -test_expect_success 'Abort merge with pre- and post-merge worktree changes' ' - # Pre-merge worktree changes - echo xyzzy > foo && - echo barf > bar && - git add bar && - git diff > expect && - git diff --staged > expect-staged && - # Perform merge - test_must_fail git merge conflict_branch && - test -f .git/MERGE_HEAD && - # Post-merge worktree changes - echo yzxxz > foo && - echo blech > baz && - ### When aborting the merge, git will discard staged changes (bar) - ### and unmerged changes (baz). Other changes that are neither - ### staged nor marked as unmerged (foo), will be preserved. For - ### these changed, git cannot tell pre-merge changes apart from - ### post-merge changes, so the post-merge changes will be - ### preserved. Change expectations accordingly: - git diff -- foo > expect && - rm expect-staged && - touch expect-staged && - # Abort merge - git merge --abort && - test ! -f .git/MERGE_HEAD && - test "$pre_merge_head" = "$(git rev-parse HEAD)" && - git diff > actual && - test_cmp expect actual && - git diff --staged > actual-staged && - test_cmp expect-staged actual-staged -' - -test_expect_success 'Reset worktree changes' ' - git reset --hard "$pre_merge_head" -' - -test_expect_success 'Abort merge with pre- and post-merge index changes' ' - # Pre-merge worktree changes - echo xyzzy > foo && - echo barf > bar && - git add bar && - git diff > expect && - git diff --staged > expect-staged && - # Perform merge - test_must_fail git merge conflict_branch && - test -f .git/MERGE_HEAD && - # Post-merge worktree changes - echo yzxxz > foo && - echo blech > baz && - git add foo bar && - ### When aborting the merge, git will discard all staged changes - ### (foo, bar and baz), and no changes will be preserved. Whether - ### the changes were staged pre- or post-merge does not matter - ### (except for not preventing starting the merge). - ### Change expectations accordingly: - rm expect expect-staged && - touch expect && - touch expect-staged && - # Abort merge - git merge --abort && - test ! -f .git/MERGE_HEAD && - test "$pre_merge_head" = "$(git rev-parse HEAD)" && - git diff > actual && - test_cmp expect actual && - git diff --staged > actual-staged && - test_cmp expect-staged actual-staged -' - test_done |