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Author SHA1 Message Date
Junio C Hamano f3cfeb3078 Merge branch 'dl/checkout-p-merge-base'
"git checkout -p A...B [-- <path>]" did not work, even though the
same command without "-p" correctly used the merge-base between
commits A and B.

* dl/checkout-p-merge-base:
  t2016: add a NEEDSWORK about the PERL prerequisite
  add-patch: add NEEDSWORK about comparing commits
  Doc: document "A...B" form for <tree-ish> in checkout and switch
  builtin/checkout: fix `git checkout -p HEAD...` bug
2020-10-27 15:09:51 -07:00
Denton Liu f82a9e517f add-patch: add NEEDSWORK about comparing commits
The two versions of add-patch has special-casing for the literal
revision "HEAD". However, we want to handle other ways of saying "HEAD"
in the same way.[0] Add a NEEDSWORK to the add-patch code that does this
so that it can be addressed later.

[0]: https://lore.kernel.org/git/xmqqsgat7ttf.fsf@gitster.c.googlers.com/

Signed-off-by: Denton Liu <liu.denton@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-10-07 09:49:06 -07:00
Junio C Hamano 458205ff0f Merge branch 'pw/add-p-edit-ita-path'
"add -p" now allows editing paths that were only added in intent.

* pw/add-p-edit-ita-path:
  add -p: fix editing of intent-to-add paths
2020-09-22 12:36:28 -07:00
Phillip Wood 75a009dc29 add -p: fix editing of intent-to-add paths
A popular way of partially staging a new file is to run `git add -N
<path>` and then use the hunk editing of `git add -p` to select the
part of the file that the user wishes to stage. Since
85953a3187 ("diff-files --raw: show correct post-image of
intent-to-add files", 2020-07-01) this has stopped working as
intent-to-add paths are now show as new files rather than changes to
an empty blob and `git apply` refused to apply a creation patch for a
path that was marked as intent-to-add. 7cfde3fa0f ("apply: allow "new
file" patches on i-t-a entries", 2020-08-06) fixed the problem with
apply but it still wasn't possible to edit the added hunk properly.

2c8bd8471a ("checkout -p: handle new files correctly", 2020-05-27)
had previously changed `add -p` to handle new files but it did not
implement patch editing correctly. The perl version simply forbade
editing and the C version opened the editor with the full diff rather
that just the hunk which meant that the user had to edit the hunk
header manually to get it to work.

The root cause of the problem is that added files store the diff header
with the hunk data rather than separating the two as we do for other
changes. Changing added files to store the diff header separately
fixes the editing problem at the expense of having to special case
empty additions as they no longer have any hunks associated with them,
only the diff header.

The changes move some existing code into a conditional changing the
indentation, they are best viewed with
--color-moved-ws=allow-indentation-change (or --ignore-space-change
works well to get an overview of the changes)

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Reported-by: Thomas Sullivan <tom@msbit.com.au>
Reported-by: Yuchen Ying <ych@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-09 12:49:01 -07:00
Jeff King 1c6ffb546b add--interactive.perl: specify --no-color explicitly
Our color tests of "git add -p" do something a bit different from how a
normal user would behave: we pretend there's a pager in use, so that Git
thinks it's OK to write color to a non-tty stdout.  This comes from
8539b46534 (t3701: avoid depending on the TTY prerequisite, 2019-12-06),
which allows us to avoid a lot of complicated mock-tty code.

However, those environment variables also make their way down to
sub-processes of add--interactive, including the "diff-files" we run to
generate the patches. As a result, it thinks it should output color,
too. So in t3701.50, for example, the machine-readable version of the
diff we get unexpectedly has color in it. We fail to parse it as a diff
and think there are zero hunks.

The test does still pass, though, because even with zero hunks we'll
dump the diff header (and we consider those unparseable bits to be part
of the header!), and so the output still has the expected color codes in
it. We don't notice that the command was totally broken and failed to
apply anything.

And in fact we're not really testing what we think we are about the
color, either. While add--interactive does correctly show the version we
got from running "diff-files --color", we'd also pass the test if we had
accidentally shown the machine-readable version, too, since it
(erroneously) has color codes in it.

One could argue that the test isn't very realistic; it's setting up this
"pretend there's a pager" situation to get around the tty restrictions
of the test environment. So one option would be to move back towards
using a real tty. But the behavior of add--interactive really is
user-visible here. If a user, for whatever reason, did run "git
--paginate add --patch" (perhaps because their pager is really a filter
or something), the command would totally fail to do anything useful.

Since we know that we don't want color in this output, let's just make
add--interactive more defensive, and say "--no-color" explicitly. It
doesn't hurt anything in the common case, but it fixes this odd case and
lets our test function properly again.

Note that the C builtin run_add_p() already passes --no-color, so it
doesn't need a similar fix. That will eventually replace this perl code
anyway, but the test change here will be valuable for ensuring that.

Signed-off-by: Jeff King <peff@peff.net>
Acked-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-08 14:49:11 -07:00
Johannes Schindelin 2c8bd8471a checkout -p: handle new files correctly
The original patch selection code was written for `git add -p`, and the
fundamental unit on which it works is a hunk.

We hacked around that to handle deletions back in 24ab81ae4d
(add-interactive: handle deletion of empty files, 2009-10-27). But `git
add -p` would never see a new file, since we only consider the set of
tracked files in the index.

However, since the same machinery was used for `git checkout -p` &
friends, we can see new files.

Handle this case specifically, adding a new prompt for it that is
modeled after the `deleted file` case.

This also fixes the problem where added _empty_ files could not be
staged via `git checkout -p`.

Reported-by: Merlin Büge <toni@bluenox07.de>
Helped-by: Jeff King <peff@peff.net>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-05-27 14:50:20 -07:00
Johannes Schindelin 89c8559367 git add -p: use non-zero exit code when the diff generation failed
The first thing `git add -p` does is to generate a diff. If this diff
cannot be generated, `git add -p` should not continue as if nothing
happened, but instead fail.

What we *actually* do here is much broader: we now verify for *every*
`run_cmd_pipe()` call that the spawned process actually succeeded.

Note that we have to change two callers in this patch, as we need to
store the spawned process' output in a local variable, which means that
the callers can no longer decide whether to interpret the `return <$fh>`
in array or in scalar context.

This bug was noticed while writing a test case for the diff.algorithm
feature, and we let that test case double as a regression test for this
fixed bug, too.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-12-06 08:57:34 -08:00
Kunal Tyagi 8085050ab4 add -i: show progress counter in the prompt
Report the current hunk count and total number of hunks for the
current file in the prompt.  Also adjust the expected output in
some tests to match.

Signed-off-by: Kunal Tyagi <tyagi.kunal@live.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-10-04 07:12:19 +09:00
Junio C Hamano f496b064fc Merge branch 'nd/switch-and-restore'
Two new commands "git switch" and "git restore" are introduced to
split "checking out a branch to work on advancing its history" and
"checking out paths out of the index and/or a tree-ish to work on
advancing the current history" out of the single "git checkout"
command.

* nd/switch-and-restore: (46 commits)
  completion: disable dwim on "git switch -d"
  switch: allow to switch in the middle of bisect
  t2027: use test_must_be_empty
  Declare both git-switch and git-restore experimental
  help: move git-diff and git-reset to different groups
  doc: promote "git restore"
  user-manual.txt: prefer 'merge --abort' over 'reset --hard'
  completion: support restore
  t: add tests for restore
  restore: support --patch
  restore: replace --force with --ignore-unmerged
  restore: default to --source=HEAD when only --staged is specified
  restore: reject invalid combinations with --staged
  restore: add --worktree and --staged
  checkout: factor out worktree checkout code
  restore: disable overlay mode by default
  restore: make pathspec mandatory
  restore: take tree-ish from --source option instead
  checkout: split part of it to new command 'restore'
  doc: promote "git switch"
  ...
2019-07-09 15:25:44 -07:00
Junio C Hamano 1b074e15d0 Merge branch 'pw/add-p-recount'
"git checkout -p" needs to selectively apply a patch in reverse,
which did not work well.

* pw/add-p-recount:
  add -p: fix checkout -p with pathological context
2019-07-09 15:25:37 -07:00
Phillip Wood 2bd69b9024 add -p: fix checkout -p with pathological context
Commit fecc6f3a68 ("add -p: adjust offsets of subsequent hunks when one is
skipped", 2018-03-01) fixed adding hunks in the correct place when a
previous hunk has been skipped. However it did not address patches that
are applied in reverse. In that case we need to adjust the pre-image
offset so that when apply reverses the patch the post-image offset is
adjusted correctly. We subtract rather than add the delta as the patch
is reversed (the easiest way to think about it is to consider a hunk of
deletions that is skipped - in that case we want to reduce offset so we
need to subtract).

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-06-13 10:00:30 -07:00
Nguyễn Thái Ngọc Duy 2f0896ec3a restore: support --patch
git-restore is different from git-checkout that it only restores the
worktree by default, not both worktree and index. add--interactive
needs some update to support this mode.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-05-07 13:04:47 +09:00
Junio C Hamano 5eb8da8508 Merge branch 'pw/add-p-recount'
When user edits the patch in "git add -p" and the user's editor is
set to strip trailing whitespaces indiscriminately, an empty line
that is unchanged in the patch would become completely empty
(instead of a line with a sole SP on it).  The code introduced in
Git 2.17 timeframe failed to parse such a patch, but now it learned
to notice the situation and cope with it.

* pw/add-p-recount:
  add -p: fix counting empty context lines in edited patches
2018-06-28 12:53:32 -07:00
Phillip Wood f4d35a6b49 add -p: fix counting empty context lines in edited patches
recount_edited_hunk() introduced in commit 2b8ea7f3c7 ("add -p:
calculate offset delta for edited patches", 2018-03-05) required all
context lines to start with a space, empty lines are not counted. This
was intended to avoid any recounting problems if the user had
introduced empty lines at the end when editing the patch. However this
introduced a regression into 'git add -p' as it seems it is common for
editors to strip the trailing whitespace from empty context lines when
patches are edited thereby introducing empty lines that should be
counted. 'git apply' knows how to deal with such empty lines and POSIX
states that whether or not there is an space on an empty context line
is implementation defined [1].

Fix the regression by counting lines that consist solely of a newline
as well as lines starting with a space as context lines and add a test
to prevent future regressions.

[1] http://pubs.opengroup.org/onlinepubs/9699919799/utilities/diff.html

Reported-by: Mahmoud Al-Qudsi <mqudsi@neosmart.net>
Reported-by: Oliver Joseph Ash <oliverjash@gmail.com>
Reported-by: Jeff Felchner <jfelchner1@gmail.com>
Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-06-11 09:45:19 -07:00
brian m. carlson 23ec4c51d5 add--interactive: compute the empty tree value
The interactive add script hard-codes the object ID of the empty tree.
To avoid any problems when changing hashes, compute this value when used
and cache it for any future uses.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-02 13:59:53 +09:00
Junio C Hamano 5f9441769f Merge branch 'pw/add-p-single'
Hotfix.

* pw/add-p-single:
  add -p: fix 2.17.0-rc* regression due to moved code
2018-04-02 10:10:55 -07:00
Ævar Arnfjörð Bjarmason fd2fb4aa0c add -p: fix 2.17.0-rc* regression due to moved code
Fix a regression in 88f6ffc1c2 ("add -p: only bind search key if
there's more than one hunk", 2018-02-13) which is present in
2.17.0-rc*, but not 2.16.0.

In Perl, regex variables like $1 always refer to the last regex
match. When the aforementioned change added a new regex match between
the old match and the corresponding code that was expecting $1, the $1
variable would always be undef, since the newly inserted regex match
doesn't have any captures.

As a result the "/" feature to search for a string in a hunk by regex
completely broke, on git.git:

    $ perl -pi -e 's/Git/Tig/g' README.md
    $ ./git --exec-path=$PWD add -p
    [..]
    Stage this hunk [y,n,q,a,d,j,J,g,/,s,e,?]? s
    Split into 4 hunks.
    [...]
    Stage this hunk [y,n,q,a,d,j,J,g,/,s,e,?]? /Many
    Use of uninitialized value $1 in string eq at /home/avar/g/git/git-add--interactive line 1568, <STDIN> line 1.
    search for regex? Many

I.e. the initial "/regex" command wouldn't work, and would always emit
a warning and ask again for a regex, now it works as intended again.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-03-31 21:54:28 -07:00
Junio C Hamano c5e2df04ac Merge branch 'jk/add-i-diff-filter'
The "interactive.diffFilter" used by "git add -i" must retain
one-to-one correspondence between its input and output, but it was
not enforced and caused end-user confusion.  We now at least make
sure the filtered result has the same number of lines as its input
to detect a broken filter.

* jk/add-i-diff-filter:
  add--interactive: detect bogus diffFilter output
  t3701: add a test for interactive.diffFilter
2018-03-14 12:01:05 -07:00
Junio C Hamano 436d18f2d0 Merge branch 'pw/add-p-recount'
"git add -p" has been lazy in coalescing split patches before
passing the result to underlying "git apply", leading to corner
case bugs; the logic to prepare the patch to be applied after hunk
selections has been tightened.

* pw/add-p-recount:
  add -p: don't rely on apply's '--recount' option
  add -p: fix counting when splitting and coalescing
  add -p: calculate offset delta for edited patches
  add -p: adjust offsets of subsequent hunks when one is skipped
  t3701: add failing test for pathological context lines
  t3701: don't hard code sha1 hash values
  t3701: use test_write_lines and write_script
  t3701: indent here documents
  add -i: add function to format hunk header
2018-03-14 12:01:04 -07:00
Jeff King 42f7d45428 add--interactive: detect bogus diffFilter output
It's important that the diff-filter only filter the
individual lines, and that there remain a one-to-one mapping
between the input and output lines. Otherwise, things like
hunk-splitting will behave quite unexpectedly (e.g., you
think you are splitting at one point, but it has a different
effect in the text patch we apply).

We can't detect all problematic cases, but we can at least
catch the obvious case where we don't even have the correct
number of lines.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-03-05 12:49:45 -08:00
Phillip Wood 3a8522f41f add -p: don't rely on apply's '--recount' option
Now that add -p counts patches properly it should be possible to turn
off the '--recount' option when invoking 'git apply'

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-03-05 10:45:41 -08:00
Phillip Wood b3e0fcfe42 add -p: fix counting when splitting and coalescing
When a file has no trailing new line at the end diff records this by
appending "\ No newline at end of file" below the last line of the
file. This line should not be counted in the hunk header. Fix the
splitting and coalescing code to count files without a trailing new line
properly and change one of the tests to test splitting without a
trailing new line.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-03-05 10:45:41 -08:00
Phillip Wood 2b8ea7f3c7 add -p: calculate offset delta for edited patches
Recount the number of preimage and postimage lines in a hunk after it
has been edited so any change in the number of insertions or deletions
can be used to adjust the offsets of subsequent hunks. If an edited
hunk is subsequently split then the offset correction will be lost. It
would be possible to fix this if it is a problem, however the code
here is still an improvement on the status quo for the common case
where an edited hunk is applied without being split.

This is also a necessary step to removing '--recount' and
'--allow-overlap' from the invocation of 'git apply'. Before
'--recount' can be removed the splitting and coalescing counting needs
to be fixed to handle a missing newline at the end of a file. In order
to remove '--allow-overlap' there needs to be i) some way of verifying
the offset data in the edited hunk (probably by correlating the
preimage (or postimage if the patch is going to be applied in reverse)
lines of the edited and unedited versions to see if they are offset or
if any leading/trailing context lines have been removed) and ii) a way of
dealing with edited hunks that change context lines that are shared
with neighbouring hunks.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-03-05 10:45:41 -08:00
Phillip Wood fecc6f3a68 add -p: adjust offsets of subsequent hunks when one is skipped
Since commit 8cbd431082 ("git-add--interactive: replace hunk
recounting with apply --recount", 2008-7-2) if a hunk is skipped then
we rely on the context lines to apply subsequent hunks in the right
place. While this works most of the time it is possible for hunks to
end up being applied in the wrong place. To fix this adjust the offset
of subsequent hunks to correct for any change in the number of
insertions or deletions due to the skipped hunk. The change in offset
due to edited hunks that have the number of insertions or deletions
changed is ignored here, it will be fixed in the next commit.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-03-01 11:39:15 -08:00
Phillip Wood 492e60c824 add -i: add function to format hunk header
This code is duplicated in a couple of places so make it into a
function as we're going to add some more callers shortly.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-02-20 08:48:04 -08:00
Phillip Wood 4bdd6e7ce3 add -p: improve error messages
If the user presses a key that isn't currently active then explain why
it isn't active rather than just listing all the keys. It already did
this for some keys, this patch does the same for the those that
weren't already handled.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-02-13 13:01:56 -08:00
Phillip Wood 88f6ffc1c2 add -p: only bind search key if there's more than one hunk
If there is only a single hunk then disable searching as there is
nothing to search for. Also print a specific error message if the user
tries to search with '/' when there's only a single hunk rather than
just listing the key bindings.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-02-13 13:01:56 -08:00
Phillip Wood 01a6966021 add -p: only display help for active keys
If the user presses a key that add -p wasn't expecting then it prints
a list of key bindings. Although the prompt only lists the active
bindings the help was printed for all bindings.  Fix this by using the
list of keys in the prompt to filter the help. Note that the list of
keys was already passed to help_patch_cmd() by the caller so there is
no change needed to the call site.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-02-13 13:01:56 -08:00
Nguyễn Thái Ngọc Duy 12434efc1d add--interactive: ignore submodule changes except HEAD
For 'add -i' and 'add -p', the only action we can take on a dirty
submodule entry is update the index with a new value from its HEAD. The
content changes inside (from its own index, untracked files...) do not
matter, at least until 'git add -i' learns about launching a new
interactive add session inside a submodule.

Ignore all other submodules changes except HEAD. This reduces the number
of entries the user has to check through in 'git add -i', and the number
of 'no' they have to answer to 'git add -p' when dirty submodules are
present.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-01-16 12:32:45 -08:00
Junio C Hamano 9bf8e0c73d Merge branch 'pw/unquote-path-in-git-pm'
Code refactoring.

* pw/unquote-path-in-git-pm:
  t9700: add tests for Git::unquote_path()
  Git::unquote_path(): throw an exception on bad path
  Git::unquote_path(): handle '\a'
  add -i: move unquote_path() to Git.pm
2017-07-10 13:42:50 -07:00
Phillip Wood 1d542a5487 add -i: move unquote_path() to Git.pm
Move unquote_path() from git-add--interactive to Git.pm so it can be
used by other scripts. Note this is a straight copy, it does not
handle '\a'. That will be fixed in the next commit.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-30 08:02:20 -07:00
Junio C Hamano 54e6ce5960 Merge branch 'jk/add-p-commentchar-fix'
"git add -p" were updated in 2.12 timeframe to cope with custom
core.commentchar but the implementation was buggy and a
metacharacter like $ and * did not work.

* jk/add-p-commentchar-fix:
  add--interactive: quote commentChar regex
  add--interactive: handle EOF in prompt_yesno
2017-06-26 14:09:31 -07:00
Jeff King d85d7ecb80 add--interactive: quote commentChar regex
Since c9d961647 (i18n: add--interactive: mark
edit_hunk_manually message for translation, 2016-12-14),
when the user asks to edit a hunk manually, we respect
core.commentChar in generating the edit instructions.
However, when we then strip out comment lines, we use a
simple regex like:

  /^$commentChar/

If your chosen comment character is a regex metacharacter,
then that will behave in a confusing manner ("$", for
instance, would only eliminate blank lines, not actual
comment lines).

We can fix that by telling perl not to respect
metacharacters.

Reported-by: Christian Rösch <christian@croesch.de>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-21 14:06:20 -07:00
Jeff King d5addcf522 add--interactive: handle EOF in prompt_yesno
The prompt_yesno function loops indefinitely waiting for a
"y" or "n" response. But it doesn't handle EOF, meaning
that we can end up in an infinite loop of reading EOF from
stdin. One way to simulate that is with:

  echo e | GIT_EDITOR='echo corrupt >' git add -p

Let's break out of the loop and propagate the undef to the
caller. Without modifying the callers that effectively turns
it into a "no" response. This is reasonable for both of the
current callers, and it leaves room for any future caller to
check for undef explicitly.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-21 14:06:09 -07:00
Jeff King 1fa8a66bf7 add--interactive: drop diff.indentHeuristic handling
Now that diff.indentHeuristic is handled automatically by the plumbing
commands, there's no need to propagate it manually.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Marc Branchaud <marcnarc@xiplink.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-09 12:24:35 +09:00
Junio C Hamano 34130cc06b Merge branch 'va/i18n-perl-scripts'
Message fix.

* va/i18n-perl-scripts:
  git-add--interactive.perl: add missing dot in a message
2017-04-19 21:37:17 -07:00
Ralf Thielow 0301f1fd92 git-add--interactive.perl: add missing dot in a message
One message appears twice in the translations and the only
difference is a dot at the end.  So add this dot to make
the messages being identical.

Signed-off-by: Ralf Thielow <ralf.thielow@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-04-13 18:01:15 -07:00
Junio C Hamano 153e0d762c Merge branch 'jk/add-i-use-pathspecs'
"git add -p <pathspec>" unnecessarily expanded the pathspec to a
list of individual files that matches the pathspec by running "git
ls-files <pathspec>", before feeding it to "git diff-index" to see
which paths have changes, because historically the pathspec
language supported by "diff-index" was weaker.  These days they are
equivalent and there is no reason to internally expand it.  This
helps both performance and avoids command line argument limit on
some platforms.

* jk/add-i-use-pathspecs:
  add--interactive: do not expand pathspecs with ls-files
2017-03-17 13:50:26 -07:00
Jeff King 7288e12cce add--interactive: do not expand pathspecs with ls-files
When we want to get the list of modified files, we first
expand any user-provided pathspecs with "ls-files", and then
feed the resulting list of paths as arguments to
"diff-index" and "diff-files". If your pathspec expands into
a large number of paths, you may run into one of two
problems:

  1. The OS may complain about the size of the argument
     list, and refuse to run. For example:

       $ (ulimit -s 128 && git add -p drivers)
       Can't exec "git": Argument list too long at .../git-add--interactive line 177.
       Died at .../git-add--interactive line 177.

     That's on the linux.git repository, which has about 20K
     files in the "drivers" directory (none of them modified
     in this case). The "ulimit -s" trick is necessary to
     show the problem on Linux even for such a gigantic set
     of paths. Other operating systems have much smaller
     limits (e.g., a real-world case was seen with only 5K
     files on OS X).

  2. Even when it does work, it's really slow. The pathspec
     code is not optimized for huge numbers of paths. Here's
     the same case without the ulimit:

       $ time git add -p drivers
       No changes.

       real	0m16.559s
       user	0m53.140s
       sys	0m0.220s

We can improve this by skipping "ls-files" completely, and
just feeding the original pathspecs to the diff commands.
This solution was discussed in 2010:

  http://public-inbox.org/git/20100105041438.GB12574@coredump.intra.peff.net/

but at the time the diff code's pathspecs were more
primitive than those used by ls-files (e.g., they did not
support globs). Making the change would have caused a
user-visible regression, so we didn't.

Since then, the pathspec code has been unified, and the diff
commands natively understand pathspecs like '*.c'.

This patch implements that solution. That skips the
argument-list limits, and the result runs much faster:

  $ time git add -p drivers
  No changes.

  real	0m0.149s
  user	0m0.116s
  sys	0m0.080s

There are two new tests. The first just exercises the
globbing behavior to confirm that we are not causing a
regression there. The second checks the actual argument
behavior using GIT_TRACE. We _could_ do it with the "ulimit
-s" trick, as above. But that would mean the test could only
run where "ulimit -s" works. And tests of that sort are
expensive, because we have to come up with enough files to
actually bust the limit (we can't just shrink the "128" down
infinitely, since it is also the in-program stack size).

Finally, two caveats and possibilities for future work:

  a. This fixes one argument-list expansion, but there may
     be others. In fact, it's very likely that if you run
     "git add -i" and select a large number of modified
     files that the script would try to feed them all to a
     single git command.

     In practice this is probably fine. The real issue here
     is that the argument list was growing with the _total_
     number of files, not the number of modified or selected
     files.

  b. If the repository contains filenames with literal wildcard
     characters (e.g., "foo*"), the original code expanded
     them via "ls-files" and then fed those wildcard names
     to "diff-index", which would have treated them as
     wildcards. This was a bug, which is now fixed (though
     unless you really go through some contortions with
     ":(literal)", it's likely that your original pathspec
     would match whatever the accidentally-expanded wildcard
     would anyway).

     So this takes us one step closer to working correctly
     with files whose names contain wildcard characters, but
     it's likely that others remain (e.g., if "git add -i"
     feeds the selected paths to "git add").

Reported-by: Wincent Colaiuta <win@wincent.com>
Reported-by: Mislav Marohnić <mislav.marohnic@gmail.com>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-03-14 13:27:23 -07:00
Jeff King c852bd54bd add--interactive: fix missing file prompt for patch mode with "-i"
When invoked as "git add -i", each menu interactive menu
option prompts the user to select a list of files. This
includes the "patch" option, which gets the list before
starting the hunk-selection loop.

As "git add -p", it behaves differently, and jumps straight
to the hunk selection loop.

Since 0539d5e6d (i18n: add--interactive: mark patch prompt
for translation, 2016-12-14), the "add -i" case mistakenly
jumps to straight to the hunk-selection loop. Prior to that
commit the distinction between the two cases was managed by
the $patch_mode variable. That commit used $patch_mode for
something else, and moved the old meaning to the "$cmd"
variable.  But it forgot to update the $patch_mode check
inside patch_update_cmd() which controls the file-list
behavior.

The simplest fix would be to change that line to check $cmd.
But while we're here, let's use a less obscure name for this
flag: $patch_mode_only, a boolean which tells whether we are
in full-interactive mode or only in patch-mode.

Reported-by: Henrik Grubbström <grubba@grubba.org>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-03-02 10:10:38 -08:00
Junio C Hamano c0588fd61a Merge branch 'rt/align-add-i-help-text'
Doc update.

* rt/align-add-i-help-text:
  git add -i: replace \t with blanks in the help message
2017-02-24 10:48:08 -08:00
Ralf Thielow e519eccdf4 git add -i: replace \t with blanks in the help message
Within the help message of 'git add -i', the 'diff' command uses one
tab character and blanks to create the space between the name and the
description while the others use blanks only.  So if the tab size is
not at 4 characters, this description will not be in range.
Replace the tab character with blanks.

Signed-off-by: Ralf Thielow <ralf.thielow@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-02-22 12:51:00 -08:00
Junio C Hamano 2ced5f2c2d Merge branch 'jc/retire-compaction-heuristics'
"git diff" and its family had two experimental heuristics to shift
the contents of a hunk to make the patch easier to read.  One of
them turns out to be better than the other, so leave only the
"--indent-heuristic" option and remove the other one.

* jc/retire-compaction-heuristics:
  diff: retire "compaction" heuristics
2017-01-10 15:24:27 -08:00
Junio C Hamano 1d73f8e86d Merge branch 'va/i18n-perl-scripts'
Porcelain scripts written in Perl are getting internationalized.

* va/i18n-perl-scripts:
  i18n: difftool: mark warnings for translation
  i18n: send-email: mark composing message for translation
  i18n: send-email: mark string with interpolation for translation
  i18n: send-email: mark warnings and errors for translation
  i18n: send-email: mark strings for translation
  i18n: add--interactive: mark status words for translation
  i18n: add--interactive: remove %patch_modes entries
  i18n: add--interactive: mark edit_hunk_manually message for translation
  i18n: add--interactive: i18n of help_patch_cmd
  i18n: add--interactive: mark patch prompt for translation
  i18n: add--interactive: mark plural strings
  i18n: clean.c: match string with git-add--interactive.perl
  i18n: add--interactive: mark strings with interpolation for translation
  i18n: add--interactive: mark simple here-documents for translation
  i18n: add--interactive: mark strings for translation
  Git.pm: add subroutines for commenting lines
2016-12-27 00:11:40 -08:00
Junio C Hamano 3cde4e02ee diff: retire "compaction" heuristics
When a patch inserts a block of lines, whose last lines are the
same as the existing lines that appear before the inserted block,
"git diff" can choose any place between these existing lines as the
boundary between the pre-context and the added lines (adjusting the
end of the inserted block as appropriate) to come up with variants
of the same patch, and some variants are easier to read than others.

We have been trying to improve the choice of this boundary, and Git
2.11 shipped with an experimental "compaction-heuristic".  Since
then another attempt to improve the logic further resulted in a new
"indent-heuristic" logic.  It is agreed that the latter gives better
result overall, and the former outlived its usefulness.

Retire "compaction", and keep "indent" as an experimental feature.
The latter hopefully will be turned on by default in a future
release, but that should be done as a separate step.

Suggested-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-12-23 12:32:22 -08:00
Vasco Almeida 55aa04423f i18n: add--interactive: mark status words for translation
Mark words 'nothing', 'unchanged' and 'binary' used to display what has
been staged or not, in "git add -i" status command.

Alternatively one could mark N__('nothing') no-op in order to
xgettext(1) extract the string and then trigger the translation at run
time only with __($print->{FILE}), but that has the side effect of triggering
retrieval of translations for the changes indicator too (e.g. +2/-1)
which may or may not be a problem.

To avoid that potential problem, mark only where there is certain to
trigger translation only of those words but in this case we must also
retrieve the translation for the eq tests, since the value assigned was
of the translation, not the English source.

Signed-off-by: Vasco Almeida <vascomalmeida@sapo.pt>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-12-14 11:00:05 -08:00
Vasco Almeida ef84426308 i18n: add--interactive: remove %patch_modes entries
Remove unnecessary entries from %patch_modes. After the i18n conversion,
these entries are not used anymore.

Signed-off-by: Vasco Almeida <vascomalmeida@sapo.pt>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-12-14 11:00:05 -08:00
Vasco Almeida c9d9616471 i18n: add--interactive: mark edit_hunk_manually message for translation
Mark message of edit_hunk_manually displayed in the editing file when
user chooses 'e' option.  The message had to be unfolded to allow
translation of the $participle verb.

Some messages end up being exactly the same for some use cases, but
left it for easier change in the future, e.g., wanting to change wording
of one particular use case.

The comment character is now used according to the git configuration
core.commentchar.

Signed-off-by: Vasco Almeida <vascomalmeida@sapo.pt>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-12-14 11:00:05 -08:00
Vasco Almeida 186b52c52a i18n: add--interactive: i18n of help_patch_cmd
Mark help message of help_patch_cmd for translation.  The message must
be unfolded to be free of variables so we can have high quality
translations.

Signed-off-by: Vasco Almeida <vascomalmeida@sapo.pt>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-12-14 11:00:05 -08:00
Vasco Almeida 0539d5e6d5 i18n: add--interactive: mark patch prompt for translation
Mark prompt message assembled in place for translation, unfolding each
use case for each entry in the %patch_modes hash table.

Previously, this script relied on whether $patch_mode was set to run the
command patch_update_cmd() or show status and loop the main loop. Now,
it uses $cmd to indicate we must run patch_update_cmd() and $patch_mode
is used to tell which flavor of the %patch_modes are we on.  This is
introduced in order to be able to mark and unfold the message prompt
knowing in which context we are.

The tracking of context was done previously by point %patch_mode_flavour
hash table to the correct entry of %patch_modes, focusing only on value
of %patch_modes. Now, we are also interested in the key ('staged',
'stash', 'checkout_head', ...).

Signed-off-by: Vasco Almeida <vascomalmeida@sapo.pt>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-12-14 11:00:05 -08:00