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wt-status.c: handle worktree renames 

Before 425a28e0a4 (diff-lib: allow ita entries treated as "not yet exist
in index" - 2016-10-24) there are never "new files" in the index, which
essentially disables rename detection because we only detect renames
when a new file appears in a diff pair.

After that commit, an i-t-a entry can appear as a new file in "git
diff-files". But the diff callback function in wt-status.c does not
handle this case and produces incorrect status output.

PS. The reader may notice that this patch adds a new xstrdup() but not
a free(). Yes we leak memory (the same for head_path). But wt_status
so far has been short lived, this leak should not matter in
practice.

Noticed-by: Alex Vandiver <alexmv@dropbox.com>
Helped-by: Igor Djordjevic <igor.d.djordjevic@gmail.com>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Nguyễn Thái Ngọc Duy 2017-12-27 17:18:39 +07:00 коммит произвёл Junio C Hamano
Родитель 5134ccde64
Коммит 176ea74793
3 изменённых файлов: 92 добавлений и 13 удалений
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23
Documentation/git-status.txt
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@ -125,14 +125,15 @@ the status.relativePaths config option below.
Short Format
~~~~~~~~~~~~
In the short-format, the status of each path is shown as
In the short-format, the status of each path is shown as one of these
forms
XY PATH1 -> PATH2
XY PATH
XY ORIG_PATH -> PATH
where `PATH1` is the path in the `HEAD`, and the " `-> PATH2`" part is
shown only when `PATH1` corresponds to a different path in the
index/worktree (i.e. the file is renamed). The `XY` is a two-letter
status code.
where `ORIG_PATH` is where the renamed/copied contents came
from. `ORIG_PATH` is only shown when the entry is renamed or
copied. The `XY` is a two-letter status code.
The fields (including the `->`) are separated from each other by a
single space. If a filename contains whitespace or other nonprintable
@ -168,6 +169,8 @@ in which case `XY` are `!!`.
[MARC] index and work tree matches
[ MARC] M work tree changed since index
[ MARC] D deleted in work tree
[ D] R renamed in work tree
[ D] C copied in work tree
-------------------------------------------------
D D unmerged, both deleted
A U unmerged, added by us
@ -285,13 +288,13 @@ Renamed or copied entries have the following format:
of similarity between the source and target of the
move or copy). For example "R100" or "C75".
<path> The pathname. In a renamed/copied entry, this
is the path in the index and in the working tree.
is the target path.
<sep> When the `-z` option is used, the 2 pathnames are separated
with a NUL (ASCII 0x00) byte; otherwise, a tab (ASCII 0x09)
byte separates them.
<origPath> The pathname in the commit at HEAD. This is only
present in a renamed/copied entry, and tells
where the renamed/copied contents came from.
<origPath> The pathname in the commit at HEAD or in the index.
This is only present in a renamed/copied entry, and
tells where the renamed/copied contents came from.
--------------------------------------------------------
Unmerged entries have the following format; the first character is

60
t/t2203-add-intent.sh
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@ -162,5 +162,65 @@ test_expect_success 'commit: ita entries ignored in empty commit check' '
)
'
test_expect_success 'rename detection finds the right names' '
git init rename-detection &&
(
cd rename-detection &&
echo contents >first &&
git add first &&
git commit -m first &&
mv first third &&
git add -N third &&
git status | grep -v "^?" >actual.1 &&
test_i18ngrep "renamed: *first -> third" actual.1 &&
git status --porcelain | grep -v "^?" >actual.2 &&
cat >expected.2 <<-\EOF &&
R first -> third
EOF
test_cmp expected.2 actual.2 &&
hash=12f00e90b6ef79117ce6e650416b8cf517099b78 &&
git status --porcelain=v2 | grep -v "^?" >actual.3 &&
cat >expected.3 <<-EOF &&
2 .R N... 100644 100644 100644 $hash $hash R100 third first
EOF
test_cmp expected.3 actual.3
)
'
test_expect_success 'double rename detection in status' '
git init rename-detection-2 &&
(
cd rename-detection-2 &&
echo contents >first &&
git add first &&
git commit -m first &&
git mv first second &&
mv second third &&
git add -N third &&
git status | grep -v "^?" >actual.1 &&
test_i18ngrep "renamed: *first -> second" actual.1 &&
test_i18ngrep "renamed: *second -> third" actual.1 &&
git status --porcelain | grep -v "^?" >actual.2 &&
cat >expected.2 <<-\EOF &&
R first -> second
R second -> third
EOF
test_cmp expected.2 actual.2 &&
hash=12f00e90b6ef79117ce6e650416b8cf517099b78 &&
git status --porcelain=v2 | grep -v "^?" >actual.3 &&
cat >expected.3 <<-EOF &&
2 R. N... 100644 100644 100644 $hash $hash R100 second first
2 .R N... 100644 100644 100644 $hash $hash R100 third second
EOF
test_cmp expected.3 actual.3
)
'
test_done

22
wt-status.c
Просмотреть файл

@ -361,8 +361,6 @@ static void wt_longstatus_print_change_data(struct wt_status *s,
switch (change_type) {
case WT_STATUS_UPDATED:
status = d->index_status;
if (d->rename_source)
one_name = d->rename_source;
break;
case WT_STATUS_CHANGED:
if (d->new_submodule_commits || d->dirty_submodule) {
@ -383,6 +381,14 @@ static void wt_longstatus_print_change_data(struct wt_status *s,
change_type);
}
/*
* Only pick up the rename it's relevant. If the rename is for
* the changed section and we're printing the updated section,
* ignore it.
*/
if (d->rename_status == status)
one_name = d->rename_source;
one = quote_path(one_name, s->prefix, &onebuf);
two = quote_path(two_name, s->prefix, &twobuf);
@ -434,7 +440,7 @@ static void wt_status_collect_changed_cb(struct diff_queue_struct *q,
struct wt_status_change_data *d;
p = q->queue[i];
it = string_list_insert(&s->change, p->one->path);
it = string_list_insert(&s->change, p->two->path);
d = it->util;
if (!d) {
d = xcalloc(1, sizeof(*d));
@ -461,6 +467,14 @@ static void wt_status_collect_changed_cb(struct diff_queue_struct *q,
/* mode_worktree is zero for a delete. */
break;
case DIFF_STATUS_COPIED:
case DIFF_STATUS_RENAMED:
if (d->rename_status)
die("BUG: multiple renames on the same target? how?");
d->rename_source = xstrdup(p->one->path);
d->rename_score = p->score * 100 / MAX_SCORE;
d->rename_status = p->status;
/* fallthru */
case DIFF_STATUS_MODIFIED:
case DIFF_STATUS_TYPE_CHANGED:
case DIFF_STATUS_UNMERGED:
@ -532,6 +546,8 @@ static void wt_status_collect_updated_cb(struct diff_queue_struct *q,
case DIFF_STATUS_COPIED:
case DIFF_STATUS_RENAMED:
if (d->rename_status)
die("BUG: multiple renames on the same target? how?");
d->rename_source = xstrdup(p->one->path);
d->rename_score = p->score * 100 / MAX_SCORE;
d->rename_status = p->status;