The goal of the patch is to introduce the GNU diff
-B/--ignore-blank-lines as closely as possible. The short option is not
available because it's already used for "break-rewrites".
When this option is used, git-diff will not create hunks that simply
add or remove empty lines, but will still show empty lines
addition/suppression if they are close enough to "valuable" changes.
There are two differences between this option and GNU diff -B option:
- GNU diff doesn't have "--inter-hunk-context", so this must be handled
- The following sequence looks like a bug (context is displayed twice):
$ seq 5 >file1
$ cat <<EOF >file2
change
1
2
3
4
5
change
EOF
$ diff -u -B file1 file2
--- file1 2013-06-08 22:13:04.471517834 +0200
+++ file2 2013-06-08 22:13:23.275517855 +0200
@@ -1,5 +1,7 @@
+change
1
2
+
3
4
5
@@ -3,3 +5,4 @@
3
4
5
+change
So here is a more thorough description of the option:
- real changes are interesting
- blank lines that are close enough (less than context size) to
interesting changes are considered interesting (recursive definition)
- "context" lines are used around each hunk of interesting changes
- If two hunks are separated by less than "inter-hunk-context", they
will be merged into one.
The implementation does the "interesting changes selection" in a single
pass.
Signed-off-by: Antoine Pelisse <apelisse@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
"git diff --diff-algorithm algo" is also understood as "git diff
--diff-algorithm=algo".
* jk/diff-algo-finishing-touches:
diff: allow unstuck arguments with --diff-algorithm
git-merge(1): document diff-algorithm option to merge-recursive
Most of these were found using Lucas De Marchi's codespell tool.
Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Acked-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When running "git log -p --submodule=log", the submodule log is not
indented by the graph output, although all other lines are. Fix this by
prepending the current line prefix to each line of the submodule log.
Signed-off-by: John Keeping <john@keeping.me.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The argument to --diff-algorithm is mandatory, so there is no reason to
require the argument to be stuck to the option with '='. Change this
for consistency with other Git commands.
Note that this does not change the handling of diff-algorithm in
merge-recursive.c since the primary interface to that is via the -X
option to 'git merge' where the unstuck form does not make sense.
Signed-off-by: John Keeping <john@keeping.me.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* ap/maint-diff-rename-avoid-overlap:
tests: make sure rename pretty print works
diff: prevent pprint_rename from underrunning input
diff: Fix rename pretty-print when suffix and prefix overlap
The logic used by "git diff -M --stat" to shorten the names of
files before and after a rename did not work correctly when the
common prefix and suffix between the two filenames overlapped.
* ap/maint-diff-rename-avoid-overlap:
tests: make sure rename pretty print works
diff: prevent pprint_rename from underrunning input
diff: Fix rename pretty-print when suffix and prefix overlap
In the warning message printed when rename or unmodified copy
detection was skipped due to too many files, change "diff.renamelimit"
to "diff.renameLimit", in order to make it consistent with git
documentation, which consistently uses "diff.renameLimit".
Signed-off-by: Max Nanasy <max.nanasy@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The logic described in d020e27 (diff: Fix rename pretty-print when
suffix and prefix overlap, 2013-02-23) is wrong: The proof in the
comment is valid only if both strings are the same length. *One* of
old/new can reach a-1 (b-1, resp.) if 'a' is a suffix of 'b' (or vice
versa).
Since the intent was to let the loop run down to the '/' at the end of
the common prefix, fix it by making that distinction explicit: if
there is no prefix, allow no underrun.
Signed-off-by: Thomas Rast <trast@student.ethz.ch>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When considering a rename for two files that have a suffix and a prefix
that can overlap, a confusing line is shown. As an example, renaming
"a/b/b/c" to "a/b/c" shows "a/b/{ => }/b/c".
Currently, what we do is calculate the common prefix ("a/b/"), and the
common suffix ("/b/c"), but the same "/b/" is actually counted both in
prefix and suffix. Then when calculating the size of the non-common part,
we end-up with a negative value which is reset to 0, thus the "{ => }".
Do not allow the common suffix to overlap the common prefix and stop
when reaching a "/" that would be in both.
Signed-off-by: Antoine Pelisse <apelisse@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Add diff.algorithm configuration so that the user does not type
"diff --histogram".
* mp/diff-algo-config:
diff: Introduce --diff-algorithm command line option
config: Introduce diff.algorithm variable
git-completion.bash: Autocomplete --minimal and --histogram for git-diff
Refactors a lot of repetitive code sequence from the graph drawing
code and adds it to the combined diff output.
* jk/diff-graph-cleanup:
combine-diff.c: teach combined diffs about line prefix
diff.c: use diff_line_prefix() where applicable
diff: add diff_line_prefix function
diff.c: make constant string arguments const
diff: write prefix to the correct file
graph: output padding for merge subsequent parents
This is a helper function to call the diff output_prefix function and
return its value as a C string, allowing us to greatly simplify
everywhere that needs to get the output prefix.
Signed-off-by: John Keeping <john@keeping.me.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Write the prefix for an output line to the same file as the actual
content.
Signed-off-by: John Keeping <john@keeping.me.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Since command line options have higher priority than config file
variables and taking previous commit into account, we need a way
how to specify myers algorithm on command line. However,
inventing `--myers` is not the right answer. We need far more
general option, and that is `--diff-algorithm`.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some users or projects prefer different algorithms over others, e.g.
patience over myers or similar. However, specifying appropriate
argument every time diff is to be used is impractical. Moreover,
creating an alias doesn't play nicely with other tools based on diff
(git-show for instance). Hence, a configuration variable which is able
to set specific algorithm is needed. For now, these four values are
accepted: 'myers' (which has the same effect as not setting the config
variable at all), 'minimal', 'patience' and 'histogram'.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
"git diff --stat" miscounted the total number of changed lines when
binary files were involved and hidden beyond --stat-count. It also
miscounted the total number of changed files when there were
unmerged paths.
* lt/diff-stat-show-0-lines:
t4049: refocus tests
diff --shortstat: do not count "unmerged" entries
diff --stat: do not count "unmerged" entries
diff --stat: move the "total count" logic to the last loop
diff --stat: use "file" temporary variable to refer to data->files[i]
diff --stat: status of unmodified pair in diff-q is not zero
test: add failing tests for "diff --stat" to t4049
Even though we show a separate *UNMERGED* entry in the patch and
diffstat output (or in the --raw format, for that matter) in
addition to and separately from the diff against the specified stage
(defaulting to #2) for unmerged paths, they should not be counted in
the total number of files affected---that would lead to counting the
same path twice.
The separation done by the previous step makes this fix simple and
straightforward. Among the filepairs in diff_queue, paths that
weren't modified, and the extra "unmerged" entries do not count as
total number of files.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The diffstat generation logic, with --stat-count limit, is
implemented as three loops.
- The first counts the width necessary to show stats up to
specified number of entries, and notes up to how many entries in
the data we need to iterate to show the graph;
- The second iterates that many times to draw the graph, adjusts
the number of "total modified files", and counts the total
added/deleted lines for the part that was shown in the graph;
- The third iterates over the remainder and only does the part to
count "total added/deleted lines" and to adjust "total modified
files" without drawing anything.
Move the logic to count added/deleted lines and modified files from
the second loop to the third loop.
This incidentally fixes a bug. The third loop was not filtering
binary changes (counted in bytes) from the total added/deleted as it
should. The second loop implemented this correctly, so if a binary
change appeared earlier than the --stat-count cutoff, the code
counted number of added/deleted lines correctly, but if it appeared
beyond the cutoff, the number of lines would have mixed with the
byte count in the buggy third loop.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Allow "git diff --submodule=log" to set to be the default via
configuration.
* rr/submodule-diff-config:
submodule: display summary header in bold
diff: rename "set" variable
diff: introduce diff.submodule configuration variable
Documentation: move diff.wordRegex from config.txt to diff-config.txt
We failed to mention a file without any content change but whose
permission bit was modified, or (worse yet) a new file without any
content in the "git diff --stat" output.
* lt/diff-stat-show-0-lines:
Fix "git diff --stat" for interesting - but empty - file changes
Currently, 'git diff --submodule' displays output with a bold diff
header for non-submodules. So this part is in bold:
diff --git a/file1 b/file1
index 30b2f6c..2638038 100644
--- a/file1
+++ b/file1
For submodules, the header looks like this:
Submodule submodule1 012b072..248d0fd:
Unfortunately, it's easy to miss in the output because it's not bold.
Change this.
Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
Acked-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Once upon a time the builtin_diff function used one color, and the color
variables were called "set" and "reset". Nowadays it is a much longer
function and we use several colors (e.g., "add", "del"). Rename "set" to
"meta" to show that it is the color for showing diff meta-info (it still
does not indicate that it is a "color", but at least it matches the
scheme of the other color variables).
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Introduce a diff.submodule configuration variable corresponding to the
'--submodule' command-line option of 'git diff'.
Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
Acked-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Code cleanups so that libgit.a does not depend on anything in the
builtin/ directory.
* nd/builtin-to-libgit:
fetch-pack: move core code to libgit.a
fetch-pack: remove global (static) configuration variable "args"
send-pack: move core code to libgit.a
Move setup_diff_pager to libgit.a
Move print_commit_list to libgit.a
Move estimate_bisect_steps to libgit.a
Move try_merge_command and checkout_fast_forward to libgit.a
This is used by diff-no-index.c, part of libgit.a while it stays in
builtin/diff.c. Move it to diff.c so that we won't get undefined
reference if a program that uses libgit.a happens to pull it in.
While at it, move check_pager from git.c to pager.c. It makes more
sense there and pager.c is also part of libgit.a
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Jeff King <peff@peff.net>
Use string_list_split_in_place() to split the comma-separated
parameters string. This simplifies the code and also fixes a bug: the
old code made calls like
memcmp(p, "lines", p_len)
which needn't work if p_len is different than the length of the
constant string (and could illegally access memory if p_len is larger
than the length of the constant string).
When p_len was less than the length of the constant string, the old
code would have allowed some abbreviations to be accepted (e.g., "cha"
for "changes") but this seems to have been a bug rather than a
feature, because (1) it is not documented; (2) no attempt was made to
handle ambiguous abbreviations, like "c" for "changes" vs
"cumulative".
Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Jeff King <peff@peff.net>
The behavior of "git diff --stat" is rather odd for files that have
zero lines of changes: it will discount them entirely unless they were
renames.
Which means that the stat output will simply not show files that only
had "other" changes: they were created or deleted, or their mode was
changed.
Now, those changes do show up in the summary, but so do renames, so
the diffstat logic is inconsistent. Why does it show renames with zero
lines changed, but not mode changes or added files with zero lines
changed?
So change the logic to not check for "is_renamed", but for
"is_interesting" instead, where "interesting" is judged to be any
action but a pure data change (because a pure data change with zero
data changed really isn't worth showing, if we ever get one in our
diffpairs).
So if you did
chmod +x Makefile
git diff --stat
before, it would show empty (" 0 files changed"), with this it shows
Makefile | 0
1 file changed, 0 insertions(+), 0 deletions(-)
which I think is a more correct diffstat (and then with "--summary" it
shows *what* the metadata change to Makefile was - this is completely
consistent with our handling of renamed files).
Side note: the old behavior was *really* odd. With no changes at all,
"git diff --stat" output was empty. With just a chmod, it said "0
files changed". No way is our legacy behavior sane.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Introduce a configuration variable diff.context that tells
Porcelain commands to use a non-default number of context
lines instead of 3 (the default). With this variable, users
do not have to keep repeating "git log -U8" from the command
line; instead, it becomes sufficient to say "git config
diff.context 8" just once.
Signed-off-by: Jeff Muizelaar <jmuizelaar@mozilla.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Once you do
$ alias glogone git log --follow
there is no way to say
$ glogone --no-follow ...
Not that "log --follow" is all that useful, but it is cheap to
support the common "you can defeat an undesirable option with a
'no-' variant of it later on the command line" pattern.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Turn many file-scope private symbols to static to reduce the
global namespace contamination.
* jc/make-static:
sequencer.c: mark a private file-scope symbol as static
ident.c: mark private file-scope symbols as static
trace.c: mark a private file-scope symbol as static
wt-status.c: mark a private file-scope symbol as static
read-cache.c: mark a private file-scope symbol as static
strbuf.c: mark a private file-scope symbol as static
sha1-array.c: mark a private file-scope symbol as static
symlinks.c: mark private file-scope symbols as static
notes.c: mark a private file-scope symbol as static
rerere.c: mark private file-scope symbols as static
graph.c: mark private file-scope symbols as static
diff.c: mark a private file-scope symbol as static
commit.c: mark a file-scope private symbol as static
builtin/notes.c: mark file-scope private symbols as static
Earlier we made the diffstat summary line that shows the number of
lines added/deleted localizable, but it was found irritating having
to see them in various languages on a list whose discussion language
is English.
The original had trivial thinko in reverting Q_(), which has been
fixed.
* nd/maint-diffstat-summary:
Revert diffstat back to English
This reverts the i18n part of 7f81463 (Use correct grammar in diffstat
summary line - 2012-02-01) but still keeps the grammar correctness for
English. It also reverts b354f11 (Fix tests under GETTEXT_POISON on
diffstat - 2012-08-27). The result is diffstat always in English
for all commands.
This helps stop users from accidentally sending localized
format-patch'd patches.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* maint-1.7.11:
Almost 1.7.11.6
gitweb: URL-decode $my_url/$my_uri when stripping PATH_INFO
rebase -i: use full onto sha1 in reflog
sh-setup: protect from exported IFS
receive-pack: do not leak output from auto-gc to standard output
t/t5400: demonstrate breakage caused by informational message from prune
setup: clarify error messages for file/revisions ambiguity
send-email: improve RFC2047 quote parsing
fsck: detect null sha1 in tree entries
do not write null sha1s to on-disk index
diff: do not use null sha1 as a sentinel value
"git diff" had a confusion between taking data from a path in the
working tree and taking data from an object that happens to have
name 0{40} recorded in a tree.
* jk/maint-null-in-trees:
fsck: detect null sha1 in tree entries
do not write null sha1s to on-disk index
diff: do not use null sha1 as a sentinel value
The output from "git diff -B" for a file that ends with an
incomplete line did not put "\ No newline..." on a line of its own.
* ab/diff-write-incomplete-line:
Fix '\ No newline...' annotation in rewrite diffs
We do not want a link to 0{40} object stored anywhere in our objects.
* jk/maint-null-in-trees:
fsck: detect null sha1 in tree entries
do not write null sha1s to on-disk index
diff: do not use null sha1 as a sentinel value
