[PATCH 3/5] unpack-trees: let read-tree -u remove index entries outside sparse area
- From
Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
- Date
- Jul 31, 2010, 06:14 UTC
- Message-ID
- <1280556869-707-4-git-send-email-pclouds@gmail.com>
- In-Reply-To
- <1280556869-707-1-git-send-email-pclouds@gmail.com>
To avoid touching the worktree outside a sparse checkout, when the update flag is enabled unpack_trees() clears the CE_UPDATE and CE_REMOVE flags on entries that do not match the sparse pattern before actually committing any updates to the index file or worktree.
The effect on the index was unintentional; sparse checkout was never meant to prevent index updates outside the area checked out. And the result is very confusing: for example, after a failed merge, currently "git reset --hard" does not reset the state completely but an additional "git reset --mixed" will.
So stop clearing the CE_REMOVE flag. Instead, maintain a CE_WT_REMOVE flag to separately track whether a particular file removal should apply to the worktree in addition to the index or not.
The CE_WT_REMOVE flag is used already to mark files that should be removed because of a narrowing checkout area. That usage will still apply; do not clear the CE_WT_REMOVE flag in that case (detectable because the CE_REMOVE flag is not set).
This bug masked some other bugs illustrated by the test suite, which will be addressed by later patches.
Reported-by: Frédéric Brière <fbriere@fbriere.net> Fixes: http://bugs.debian.org/583699
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> --- cache.h | 3 +-- t/t1011-read-tree-sparse-checkout.sh | 11 ++++++++++- unpack-trees.c | 29 +++++++++++++++++++---------- 3 files changed, 30 insertions(+), 13 deletions(-)
diff --git a/cache.h b/cache.h index 0d101e4..4e7bb62 100644 --- a/cache.h +++ b/cache.h @@ -179,8 +179,7 @@ struct cache_entry { #define CE_UNHASHED (0x200000) #define CE_CONFLICTED (0x800000) -/* Only remove in work directory, not index */ -#define CE_WT_REMOVE (0x400000) +#define CE_WT_REMOVE (0x400000) /* remove in work directory */ #define CE_UNPACKED (0x1000000) diff --git a/t/t1011-read-tree-sparse-checkout.sh b/t/t1011-read-tree-sparse-checkout.sh index 2876daf..3e01c6e 100755 --- a/t/t1011-read-tree-sparse-checkout.sh +++ b/t/t1011-read-tree-sparse-checkout.sh @@ -146,7 +146,7 @@ test_expect_success 'read-tree adds to worktree, absent case' ' test ! -f sub/added ' -test_expect_success 'read-tree adds to worktree, dirty case' ' +test_expect_failure 'read-tree adds to worktree, dirty case' ' echo init.t >.git/info/sparse-checkout && git checkout -f removed && mkdir sub && @@ -167,4 +167,13 @@ test_expect_success 'index removal and worktree narrowing at the same time' ' test_cmp empty result ' +test_expect_success 'read-tree --reset removes outside worktree' ' + >empty && + echo init.t >.git/info/sparse-checkout && + git checkout -f top && + git reset --hard removed && + git ls-files sub/added >result && + test_cmp empty result +' + test_done diff --git a/unpack-trees.c b/unpack-trees.c index 6d0df99..1413872 100644 --- a/unpack-trees.c +++ b/unpack-trees.c @@ -53,6 +53,9 @@ static void add_entry(struct unpack_trees_options *o, struct cache_entry *ce, clear |= CE_HASHED | CE_UNHASHED; + if (set & CE_REMOVE) + set |= CE_WT_REMOVE; + memcpy(new, ce, size); new->next = NULL; new->ce_flags = (new->ce_flags & ~clear) | set; @@ -84,7 +87,7 @@ static int check_updates(struct unpack_trees_options *o) if (o->update && o->verbose_update) { for (total = cnt = 0; cnt < index->cache_nr; cnt++) { struct cache_entry *ce = index->cache[cnt]; - if (ce->ce_flags & (CE_UPDATE | CE_REMOVE | CE_WT_REMOVE)) + if (ce->ce_flags & (CE_UPDATE | CE_WT_REMOVE)) total++; } @@ -104,12 +107,6 @@ static int check_updates(struct unpack_trees_options *o) unlink_entry(ce); continue; } - - if (ce->ce_flags & CE_REMOVE) { - display_progress(progress, ++cnt); - if (o->update) - unlink_entry(ce); - } } remove_marked_cache_entries(&o->result); remove_scheduled_dirs(); @@ -164,10 +161,22 @@ static int apply_sparse_checkout(struct cache_entry *ce, struct unpack_trees_opt /* * Merge strategies may set CE_UPDATE|CE_REMOVE outside checkout * area as a result of ce_skip_worktree() shortcuts in - * verify_absent() and verify_uptodate(). Clear them. + * verify_absent() and verify_uptodate(). + * Make sure they don't modify worktree if they are already + * outside checkout area */ - if (was_skip_worktree && ce_skip_worktree(ce)) - ce->ce_flags &= ~(CE_UPDATE | CE_REMOVE); + if (was_skip_worktree && ce_skip_worktree(ce)) { + ce->ce_flags &= ~CE_UPDATE; + + /* + * By default, when CE_REMOVE is on, CE_WT_REMOVE is also + * on to get that file removed from both index and worktree. + * If that file is already outside worktree area, don't + * bother remove it. + */ + if (ce->ce_flags & CE_REMOVE) + ce->ce_flags &= ~CE_WT_REMOVE; + } if (!was_skip_worktree && ce_skip_worktree(ce)) { /*
-- 1.7.1.rc1.69.g24c2f7