From 75973b2cb58bf2b3038c5c214fc0a1b96d6868fe Mon Sep 17 00:00:00 2001 From: Junio C Hamano Date: Wed, 20 Apr 2011 18:11:19 -0700 Subject: [PATCH] Fix "add -u" that sometimes fails to resolve unmerged paths "git add -u" updates the index with the updated contents from the working tree by internally running "diff-files" to grab the set of paths that are different from the index. Then it updates the index entries for the paths that are modified in the working tree, and deletes the index entries for the paths that are deleted in the working tree. It ignored the output from the diff-files that indicated that a path is unmerged. For these paths, it instead relied on the fact that an unmerged path is followed by the result of comparison between stage #2 (ours) and the working tree, and used that to update or delete such a path when it is used to record the resolution of a conflict. As the result, when a path did not have stage #2 (e.g. "we deleted while the other side added"), these unmerged stages were left behind, instead of recording what the user resolved in the working tree. Since we recently fixed "diff-files" to indicate if the corresponding path exists on the working tree for an unmerged path, we do not have to rely on the comparison with stage #2 anymore. We can instead tell the diff-files not to compare with higher stages, and use the unmerged output to update the index to reflect the state of the working tree. The changes to the test vector in t2200 illustrates the nature of the bug and the fix. The test expected stage #1 and #3 entries be left behind, but it was codifying the buggy behaviour. Signed-off-by: Junio C Hamano --- builtin/add.c | 45 ++++++++++++++++++++++--------------------- t/t2200-add-update.sh | 28 +++++++++------------------ 2 files changed, 32 insertions(+), 41 deletions(-) diff --git a/builtin/add.c b/builtin/add.c index 56a4e0af6b..027ca3b6d1 100644 --- a/builtin/add.c +++ b/builtin/add.c @@ -27,6 +27,27 @@ struct update_callback_data int add_errors; }; +static int fix_unmerged_status(struct diff_filepair *p, + struct update_callback_data *data) +{ + if (p->status != DIFF_STATUS_UNMERGED) + return p->status; + if (!(data->flags & ADD_CACHE_IGNORE_REMOVAL) && !p->two->mode) + /* + * This is not an explicit add request, and the + * path is missing from the working tree (deleted) + */ + return DIFF_STATUS_DELETED; + else + /* + * Either an explicit add request, or path exists + * in the working tree. An attempt to explicitly + * add a path that does not exist in the working tree + * will be caught as an error by the caller immediately. + */ + return DIFF_STATUS_MODIFIED; +} + static void update_callback(struct diff_queue_struct *q, struct diff_options *opt, void *cbdata) { @@ -36,30 +57,9 @@ static void update_callback(struct diff_queue_struct *q, for (i = 0; i < q->nr; i++) { struct diff_filepair *p = q->queue[i]; const char *path = p->one->path; - switch (p->status) { + switch (fix_unmerged_status(p, data)) { default: die("unexpected diff status %c", p->status); - case DIFF_STATUS_UNMERGED: - /* - * ADD_CACHE_IGNORE_REMOVAL is unset if "git - * add -u" is calling us, In such a case, a - * missing work tree file needs to be removed - * if there is an unmerged entry at stage #2, - * but such a diff record is followed by - * another with DIFF_STATUS_DELETED (and if - * there is no stage #2, we won't see DELETED - * nor MODIFIED). We can simply continue - * either way. - */ - if (!(data->flags & ADD_CACHE_IGNORE_REMOVAL)) - continue; - /* - * Otherwise, it is "git add path" is asking - * to explicitly add it; we fall through. A - * missing work tree file is an error and is - * caught by add_file_to_index() in such a - * case. - */ case DIFF_STATUS_MODIFIED: case DIFF_STATUS_TYPE_CHANGED: if (add_file_to_index(&the_index, path, data->flags)) { @@ -92,6 +92,7 @@ int add_files_to_cache(const char *prefix, const char **pathspec, int flags) data.flags = flags; data.add_errors = 0; rev.diffopt.format_callback_data = &data; + rev.max_count = 0; /* do not compare unmerged paths with stage #2 */ run_diff_files(&rev, DIFF_RACY_IS_MODIFIED); return !!data.add_errors; } diff --git a/t/t2200-add-update.sh b/t/t2200-add-update.sh index 2ad2819a34..d3bb9fab4f 100755 --- a/t/t2200-add-update.sh +++ b/t/t2200-add-update.sh @@ -149,31 +149,21 @@ test_expect_success 'add -u resolves unmerged paths' ' echo 3 >path1 && echo 2 >path3 && echo 2 >path5 && + + # Explicit resolving by adding removed paths should fail + test_must_fail git add path4 && + test_must_fail git add path6 && + + # "add -u" should notice removals no matter what stages + # the index entries are in. git add -u && git ls-files -s path1 path2 path3 path4 path5 path6 >actual && - { - echo "100644 $three 0 path1" - echo "100644 $one 1 path3" - echo "100644 $one 1 path4" - echo "100644 $one 3 path5" - echo "100644 $one 3 path6" - } >expect && - test_cmp expect actual && - - # Bonus tests. Explicit resolving - git add path3 path5 && - test_must_fail git add path4 && - test_must_fail git add path6 && - git rm path4 && - git rm path6 && - - git ls-files -s "path?" >actual && { echo "100644 $three 0 path1" echo "100644 $two 0 path3" echo "100644 $two 0 path5" - } >expect - + } >expect && + test_cmp expect actual ' test_expect_success '"add -u non-existent" should fail' '