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2017-03-10Merge branch 'rs/log-email-subject'Libravatar Junio C Hamano1-3/+4
Code clean-up. * rs/log-email-subject: pretty: use fmt_output_email_subject() log-tree: factor out fmt_output_email_subject()
2017-03-01pretty: use fmt_output_email_subject()Libravatar René Scharfe1-3/+4
Add the email-style subject prefix (e.g. "Subject: [PATCH] ") directly when it's needed instead of letting log_write_email_headers() prepare it in a static buffer in advance. This simplifies storage ownership and code flow. Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-12-11pretty: add %(trailers) format for displaying trailers of a commit messageLibravatar Jacob Keller1-0/+17
Recent patches have expanded on the trailers.c code and we have the builtin commant git-interpret-trailers which can be used to add or modify trailer lines. However, there is no easy way to simply display the trailers of a commit message. Add support for %(trailers) format modifier which will use the trailer_info_get() calls to read trailers in an identical way as git interpret-trailers does. Use a long format option instead of a short name so that future work can more easily unify ref-filter and pretty formats. Add documentation and tests for the same. Signed-off-by: Jacob Keller <jacob.keller@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-10-26Merge branch 'mg/gpg-richer-status'Libravatar Junio C Hamano1-0/+4
The GPG verification status shown in "%G?" pretty format specifier was not rich enough to differentiate a signature made by an expired key, a signature made by a revoked key, etc. New output letters have been assigned to express them. * mg/gpg-richer-status: gpg-interface: use more status letters
2016-10-17Merge branch 'rs/cocci'Libravatar Junio C Hamano1-7/+5
Code cleanup. * rs/cocci: use strbuf_add_unique_abbrev() for adding short hashes, part 3 remove unnecessary NULL check before free(3)
2016-10-12gpg-interface: use more status lettersLibravatar Michael J Gruber1-0/+4
According to gpg2's doc/DETAILS: For each signature only one of the codes GOODSIG, BADSIG, EXPSIG, EXPKEYSIG, REVKEYSIG or ERRSIG will be emitted. gpg1 ("classic") behaves the same (although doc/DETAILS differs). Currently, we parse gpg's status output for GOODSIG, BADSIG and trust information and translate that into status codes G, B, U, N for the %G? format specifier. git-verify-* returns success in the GOODSIG case only. This is somewhat in disagreement with gpg, which considers the first 5 of the 6 above as VALIDSIG, but we err on the very safe side. Introduce additional status codes E, X, Y, R for ERRSIG, EXPSIG, EXPKEYSIG, and REVKEYSIG so that a user of %G? gets more information about the absence of a 'G' on first glance. Requested-by: Alex <agrambot@gmail.com> Signed-off-by: Michael J Gruber <git@drmicha.warpmail.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-10-10use strbuf_add_unique_abbrev() for adding short hashes, part 3Libravatar René Scharfe1-7/+5
Call strbuf_add_unique_abbrev() to add abbreviated hashes to strbufs instead of taking detours through find_unique_abbrev() and its static buffer. This is shorter in most cases and a bit more efficient. The changes here are not easily handled by a semantic patch because they involve removing temporary variables and deconstructing format strings for strbuf_addf(). Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-10-06Merge branch 'rs/c-auto-resets-attributes'Libravatar Junio C Hamano1-1/+1
When "%C(auto)" appears at the very beginning of the pretty format string, it did not need to issue the reset sequence, but it did. * rs/c-auto-resets-attributes: pretty: avoid adding reset for %C(auto) if output is empty
2016-09-29pretty: avoid adding reset for %C(auto) if output is emptyLibravatar René Scharfe1-1/+1
We emit an escape sequence for resetting color and attribute for %C(auto) to make sure automatic coloring is displayed as intended. Stop doing that if the output strbuf is empty, i.e. when %C(auto) appears at the start of the format string, because then there is no need for a reset and we save a few bytes in the output. Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-09-26Merge branch 'rs/c-auto-resets-attributes'Libravatar Junio C Hamano1-0/+2
The pretty-format specifier "%C(auto)" used by the "log" family of commands to enable coloring of the output is taught to also issue a color-reset sequence to the output. * rs/c-auto-resets-attributes: pretty: let %C(auto) reset all attributes
2016-09-19pretty: let %C(auto) reset all attributesLibravatar René Scharfe1-0/+2
Reset colors and attributes upon %C(auto) to enable full automatic control over them; otherwise attributes like bold or reverse could still be in effect from previous %C placeholders. Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-09-12Merge branch 'rs/hex2chr'Libravatar Junio C Hamano1-8/+5
* rs/hex2chr: introduce hex2chr() for converting two hexadecimal digits to a character
2016-09-07introduce hex2chr() for converting two hexadecimal digits to a characterLibravatar René Scharfe1-8/+5
Add and use a helper function that decodes the char value of two hexadecimal digits. It returns a negative number on error, avoids running over the end of the given string and doesn't shift negative values. Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-08-12Merge branch 'rs/use-strbuf-add-unique-abbrev'Libravatar Junio C Hamano1-7/+6
A small code clean-up. * rs/use-strbuf-add-unique-abbrev: use strbuf_add_unique_abbrev() for adding short hashes
2016-08-06use strbuf_add_unique_abbrev() for adding short hashesLibravatar René Scharfe1-7/+6
Call strbuf_add_unique_abbrev() to add abbreviated hashes to strbufs instead of taking detours through find_unique_abbrev() and its static buffer. This is shorter and a bit more efficient. Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-07-28Merge branch 'js/find-commit-subject-ignore-leading-blanks' into maintLibravatar Junio C Hamano1-8/+8
A helper function that takes the contents of a commit object and finds its subject line did not ignore leading blank lines, as is commonly done by other codepaths. Make it ignore leading blank lines to match. * js/find-commit-subject-ignore-leading-blanks: reset --hard: skip blank lines when reporting the commit subject sequencer: use skip_blank_lines() to find the commit subject commit -C: skip blank lines at the beginning of the message commit.c: make find_commit_subject() more robust pretty: make the skip_blank_lines() function public
2016-07-11Merge branch 'nd/graph-width-padded' into maintLibravatar Junio C Hamano1-1/+8
"log --graph --format=" learned that "%>|(N)" specifies the width relative to the terminal's left edge, not relative to the area to draw text that is to the right of the ancestry-graph section. It also now accepts negative N that means the column limit is relative to the right border. * nd/graph-width-padded: pretty.c: support <direction>|(<negative number>) forms pretty: pass graph width to pretty formatting for use in '%>|(N)'
2016-07-11Merge branch 'js/find-commit-subject-ignore-leading-blanks'Libravatar Junio C Hamano1-8/+8
A helper function that takes the contents of a commit object and finds its subject line did not ignore leading blank lines, as is commonly done by other codepaths. Make it ignore leading blank lines to match. * js/find-commit-subject-ignore-leading-blanks: reset --hard: skip blank lines when reporting the commit subject sequencer: use skip_blank_lines() to find the commit subject commit -C: skip blank lines at the beginning of the message commit.c: make find_commit_subject() more robust pretty: make the skip_blank_lines() function public
2016-07-06Merge branch 'nd/graph-width-padded'Libravatar Junio C Hamano1-1/+8
"log --graph --format=" learned that "%>|(N)" specifies the width relative to the terminal's left edge, not relative to the area to draw text that is to the right of the ancestry-graph section. It also now accepts negative N that means the column limit is relative to the right border. * nd/graph-width-padded: pretty.c: support <direction>|(<negative number>) forms pretty: pass graph width to pretty formatting for use in '%>|(N)'
2016-07-06Merge branch 'ew/mboxrd-format-am'Libravatar Junio C Hamano1-8/+25
Teach format-patch and mailsplit (hence "am") how a line that happens to begin with "From " in the e-mail message is quoted with ">", so that these lines can be restored to their original shape. * ew/mboxrd-format-am: am: support --patch-format=mboxrd mailsplit: support unescaping mboxrd messages pretty: support "mboxrd" output format
2016-06-27Merge branch 'et/pretty-format-c-auto' into maintLibravatar Junio C Hamano1-1/+1
The commands in `git log` family take %C(auto) in a custom format string. This unconditionally turned the color on, ignoring --no-color or with --color=auto when the output is not connected to a tty; this was corrected to make the format truly behave as "auto". * et/pretty-format-c-auto: format_commit_message: honor `color=auto` for `%C(auto)`
2016-06-22pretty: make the skip_blank_lines() function publicLibravatar Johannes Schindelin1-8/+8
This function will be used also in the find_commit_subject() function. While at it, rename the function to reflect that it skips not only empty lines, but any lines consisting of only whitespace, too. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-06-20Merge branch 'et/pretty-format-c-auto'Libravatar Junio C Hamano1-1/+1
The commands in `git log` family take %C(auto) in a custom format string. This unconditionally turned the color on, ignoring --no-color or with --color=auto when the output is not connected to a tty; this was corrected to make the format truly behave as "auto". * et/pretty-format-c-auto: format_commit_message: honor `color=auto` for `%C(auto)`
2016-06-16pretty.c: support <direction>|(<negative number>) formsLibravatar Nguyễn Thái Ngọc Duy1-1/+7
%>|(num), %><|(num) and %<|(num), where num is a positive number, sets a fixed column from the screen's left border. There is no way for us to specifiy a column relative to the right border, which is useful when you want to make use of all terminal space (on big screens). Use negative num for that. Inspired by Go's array syntax (*). (*) I know Python has this first (or before Go, at least) but the idea didn't occur to me until I learned Go. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-06-16pretty: pass graph width to pretty formatting for use in '%>|(N)'Libravatar Josef Kufner1-0/+1
Pass graph width to pretty formatting, to make N in '%>|(N)' include columns consumed by graph rendered when --graph option is in use. For example, in the output of git log --all --graph --pretty='format: [%>|(20)%h] %ar%d' this change will make all commit hashes align at 20th column from the edge of the terminal, not from the edge of the graph. Signed-off-by: Josef Kufner <josef@kufner.cz> Signed-off-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-06-06pretty: support "mboxrd" output formatLibravatar Eric Wong1-8/+25
This output format prevents format-patch output from breaking readers if somebody copy+pasted an mbox into a commit message. Unlike the traditional "mboxo" format, "mboxrd" is designed to be fully-reversible. "mboxrd" also gracefully degrades to showing extra ">" in existing "mboxo" readers. This degradation is preferable to breaking message splitting completely, a problem I've seen in "mboxcl" due to having multiple, non-existent, or inaccurate Content-Length headers. "mboxcl2" is a non-starter since it's inherits the problems of "mboxcl" while being completely incompatible with existing tooling based around mailsplit. ref: http://homepage.ntlworld.com/jonathan.deboynepollard/FGA/mail-mbox-formats.html Signed-off-by: Eric Wong <e@80x24.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-05-27format_commit_message: honor `color=auto` for `%C(auto)`Libravatar Edward Thomson1-1/+1
git-log(1) documents that when specifying the `%C(auto)` format placeholder will "turn on auto coloring on the next %placeholders until the color is switched again." However, when `%C(auto)` is used, the present implementation will turn colors on unconditionally (even if the color configuration is turned off for the current context - for example, `--no-color` was specified or the color is `auto` and the output is not a tty). Update `format_commit_one` to examine the current context when a format string of `%C(auto)` is specified, which ensures that we will not unconditionally write colors. This brings that behavior in line with the behavior of `%C(auto,<colorname>)`, and allows the user the ability to specify that color should be displayed only when the output is a tty. Additionally, add a test for `%C(auto)` and update the existing tests for `%C(auto,...)` as they were misidentified as being applicable to `%C(auto)`. Tests from Jeff King. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Edward Thomson <ethomson@edwardthomson.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-03-30pretty: allow tweaking tabwidth in --expand-tabsLibravatar Junio C Hamano1-7/+8
When the local convention of the project is to use tab width that is not 8, it may make sense to allow "git log --expand-tabs=<n>" to tweak the output to match it. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-03-30pretty: enable --expand-tabs by default for selected pretty formatsLibravatar Junio C Hamano1-7/+11
"git log --pretty={medium,full,fuller}" and "git log" by default prepend 4 spaces to the log message, so it makes sense to enable the new "expand-tabs" facility by default for these formats. Add --no-expand-tabs option to override the new default. The change alone breaks a test in t4201 that runs "git shortlog" on the output from "git log", and expects that the output from "git log" does not do such a tab expansion. Adjust the test to explicitly disable expand-tabs with --no-expand-tabs. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-03-30pretty: expand tabs in indented logs to make things line up properlyLibravatar Linus Torvalds1-2/+69
A commit log message sometimes tries to line things up using tabs, assuming fixed-width font with the standard 8-place tab settings. Viewing such a commit however does not work well in "git log", as we indent the lines by prefixing 4 spaces in front of them. This should all line up: Column 1 Column 2 -------- -------- A B ABCD EFGH SPACES Instead of Tabs Even with multi-byte UTF8 characters: Column 1 Column 2 -------- -------- Ä B åäö 100 A Møøse once bit my sister.. Tab-expand the lines in "git log --expand-tabs" output before prefixing 4 spaces. This is based on the patch by Linus Torvalds, but at this step, we require an explicit command line option to enable the behaviour. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-11-20Remove get_object_hash.Libravatar brian m. carlson1-4/+4
Convert all instances of get_object_hash to use an appropriate reference to the hash member of the oid member of struct object. This provides no functional change, as it is essentially a macro substitution. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Jeff King <peff@peff.net>
2015-11-20Convert struct object to object_idLibravatar brian m. carlson1-5/+5
struct object is one of the major data structures dealing with object IDs. Convert it to use struct object_id instead of an unsigned char array. Convert get_object_hash to refer to the new member as well. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Jeff King <peff@peff.net>
2015-11-20Add several uses of get_object_hash.Libravatar brian m. carlson1-4/+4
Convert most instances where the sha1 member of struct object is dereferenced to use get_object_hash. Most instances that are passed to functions that have versions taking struct object_id, such as get_sha1_hex/get_oid_hex, or instances that can be trivially converted to use struct object_id instead, are not converted. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Jeff King <peff@peff.net>
2015-06-29convert "enum date_mode" into a structLibravatar Jeff King1-14/+15
In preparation for adding date modes that may carry extra information beyond the mode itself, this patch converts the date_mode enum into a struct. Most of the conversion is fairly straightforward; we pass the struct as a pointer and dereference the type field where necessary. Locations that declare a date_mode can use a "{}" constructor. However, the tricky case is where we use the enum labels as constants, like: show_date(t, tz, DATE_NORMAL); Ideally we could say: show_date(t, tz, &{ DATE_NORMAL }); but of course C does not allow that. Likewise, we cannot cast the constant to a struct, because we need to pass an actual address. Our options are basically: 1. Manually add a "struct date_mode d = { DATE_NORMAL }" definition to each caller, and pass "&d". This makes the callers uglier, because they sometimes do not even have their own scope (e.g., they are inside a switch statement). 2. Provide a pre-made global "date_normal" struct that can be passed by address. We'd also need "date_rfc2822", "date_iso8601", and so forth. But at least the ugliness is defined in one place. 3. Provide a wrapper that generates the correct struct on the fly. The big downside is that we end up pointing to a single global, which makes our wrapper non-reentrant. But show_date is already not reentrant, so it does not matter. This patch implements 3, along with a minor macro to keep the size of the callers sane. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-03-05Merge branch 'rs/simple-cleanups'Libravatar Junio C Hamano1-1/+1
Code cleanups. * rs/simple-cleanups: sha1_name: use strlcpy() to copy strings pretty: use starts_with() to check for a prefix for-each-ref: use skip_prefix() to avoid duplicate string comparison connect: use strcmp() for string comparison
2015-02-22pretty: use starts_with() to check for a prefixLibravatar René Scharfe1-1/+1
Simplify the code and avoid duplication by using starts_with() instead of strlen() and strncmp() to check if a line starts with "encoding ". Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-10-20Merge branch 'jn/parse-config-slot'Libravatar Junio C Hamano1-3/+2
Code cleanup. * jn/parse-config-slot: color_parse: do not mention variable name in error message pass config slots as pointers instead of offsets
2014-10-14color_parse: do not mention variable name in error messageLibravatar Jeff King1-3/+2
Originally the color-parsing function was used only for config variables. It made sense to pass the variable name so that the die() message could be something like: $ git -c color.branch.plain=bogus branch fatal: bad color value 'bogus' for variable 'color.branch.plain' These days we call it in other contexts, and the resulting error messages are a little confusing: $ git log --pretty='%C(bogus)' fatal: bad color value 'bogus' for variable '--pretty format' $ git config --get-color foo.bar bogus fatal: bad color value 'bogus' for variable 'command line' This patch teaches color_parse to complain only about the value, and then return an error code. Config callers can then propagate that up to the config parser, which mentions the variable name. Other callers can provide a custom message. After this patch these three cases now look like: $ git -c color.branch.plain=bogus branch error: invalid color value: bogus fatal: unable to parse 'color.branch.plain' from command-line config $ git log --pretty='%C(bogus)' error: invalid color value: bogus fatal: unable to parse --pretty format $ git config --get-color foo.bar bogus error: invalid color value: bogus fatal: unable to parse default color value Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-10-07use skip_prefix() to avoid more magic numbersLibravatar René Scharfe1-30/+26
Continue where ae021d87 (use skip_prefix to avoid magic numbers) left off and use skip_prefix() in more places for determining the lengths of prefix strings to avoid using dependent constants and other indirect methods. Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-09-29Merge branch 'hj/pretty-naked-decoration'Libravatar Junio C Hamano1-0/+4
The pretty-format specifier "%d", which expanded to " (tagname)" for a tagged commit, gained a cousin "%D" that just gives the "tagname" without frills. * hj/pretty-naked-decoration: pretty: add %D format specifier
2014-09-19Merge branch 'rs/export-strbuf-addchars'Libravatar Junio C Hamano1-7/+3
Code clean-up. * rs/export-strbuf-addchars: strbuf: use strbuf_addchars() for adding a char multiple times strbuf: export strbuf_addchars()
2014-09-19Merge branch 'jk/commit-author-parsing'Libravatar Junio C Hamano1-27/+6
Code clean-up. * jk/commit-author-parsing: determine_author_info(): copy getenv output determine_author_info(): reuse parsing functions date: use strbufs in date-formatting functions record_author_date(): use find_commit_header() record_author_date(): fix memory leak on malformed commit commit: provide a function to find a header in a buffer
2014-09-19Merge branch 'bb/date-iso-strict'Libravatar Junio C Hamano1-1/+4
"log --date=iso" uses a slight variant of ISO 8601 format that is made more human readable. A new "--date=iso-strict" option gives datetime output that is more strictly conformant. * bb/date-iso-strict: pretty: provide a strict ISO 8601 date format
2014-09-18pretty: add %D format specifierLibravatar Harry Jeffery1-0/+4
Add a new format specifier, '%D' that is identical in behaviour to '%d', except that it does not include the ' (' prefix or ')' suffix provided by '%d'. Signed-off-by: Harry Jeffery <harry@exec64.co.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-09-08strbuf: use strbuf_addchars() for adding a char multiple timesLibravatar René Scharfe1-7/+3
Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-09-02Merge branch 'ta/pretty-parse-config'Libravatar Junio C Hamano1-1/+3
* ta/pretty-parse-config: pretty.c: make git_pretty_formats_config return -1 on git_config_string failure
2014-08-29pretty: provide a strict ISO 8601 date formatLibravatar Beat Bolli1-1/+4
Git's "ISO" date format does not really conform to the ISO 8601 standard due to small differences, and it cannot be parsed by ISO 8601-only parsers, e.g. those of XML toolchains. The output from "--date=iso" deviates from ISO 8601 in these ways: - a space instead of the `T` date/time delimiter - a space between time and time zone - no colon between hours and minutes of the time zone Add a strict ISO 8601 date format for displaying committer and author dates. Use the '%aI' and '%cI' format specifiers and add '--date=iso-strict' or '--date=iso8601-strict' date format names. See http://thread.gmane.org/gmane.comp.version-control.git/255879 and http://thread.gmane.org/gmane.comp.version-control.git/52414/focus=52585 for discussion. Signed-off-by: Beat Bolli <bbolli@ewanet.ch> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-08-27commit: provide a function to find a header in a bufferLibravatar Jeff King1-27/+6
Usually when we parse a commit, we read it line by line and handle each individual line (e.g., parse_commit and parse_commit_header). Sometimes, however, we only care about extracting a single header. Code in this situation is stuck doing an ad-hoc parse of the commit buffer. Let's provide a reusable function to locate a header within the commit. The code is modeled after pretty.c's get_header, which is used to extract the encoding. Since some callers may not have the "struct commit" to go along with the buffer, we drop that parameter. The only thing lost is a warning for truncated commits, but that's OK. This shouldn't happen in practice, and even if it does, there's no particular reason that this function needs to complain about it. It either finds the header it was asked for, or it doesn't (and in the latter case, the caller will typically complain). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-08-04pretty.c: make git_pretty_formats_config return -1 on git_config_string failureLibravatar Tanay Abhra1-1/+3
`git_pretty_formats_config()` continues without checking git_config_string's return value which can lead to a SEGFAULT. Instead return -1 when git_config_string fails signalling `git_config()` to die printing the location of the erroneous variable. Signed-off-by: Tanay Abhra <tanayabh@gmail.com> Reviewed-by: Matthieu Moy <Matthieu.Moy@imag.fr> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-07-30pretty: make empty userformats truly emptyLibravatar Jeff King1-0/+5
If the user provides an empty format with "--format=", we end up putting in extra whitespace that the user cannot prevent. This comes from two places: 1. If the format is missing a terminating newline, we add one automatically. This makes sense for --format=%h, but not for a truly empty format. 2. We add an extra newline between the pretty-printed format and a diff or diffstat. If the format is empty, there's no point in doing so if there's nothing to separate. With this patch, one can get a diff with no other cruft out of "diff-tree --format= $commit". Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>