Commit Graph

12627 Commits

Author SHA1 Message Date
Đoàn Trần Công Danh
9da37fe11e Documentation: reword commit --no-gpg-sign
Merge with --gpg-sign option, and clarify that --no-gpg-sign also
override earlier --gpg-sign.

Signed-off-by: Đoàn Trần Công Danh <congdanhqx@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-04-03 11:37:22 -07:00
Đoàn Trần Công Danh
ae06ba611a Documentation: document am --no-gpg-sign
Signed-off-by: Đoàn Trần Công Danh <congdanhqx@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-04-03 11:37:22 -07:00
Đoàn Trần Công Danh
cf0ad4d199 cherry-pick/revert: honour --no-gpg-sign in all case
{cherry-pick,revert} --edit hasn't honoured --no-gpg-sign yet.

Pass this option down to git-commit to honour it.

Signed-off-by: Đoàn Trần Công Danh <congdanhqx@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-04-03 11:37:22 -07:00
Đoàn Trần Công Danh
c241371c04 rebase.c: honour --no-gpg-sign
Signed-off-by: Đoàn Trần Công Danh <congdanhqx@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-04-03 11:37:22 -07:00
Martin Ågren
3c255ad660 user-manual.conf: don't specify [listingblock]
This is the config file we use when we build the user manual with
AsciiDoc. The comment at the top of this chunk that we're removing says
the following:

  "unbreak" docbook-xsl v1.68 for manpages (sic!). v1.69 works with or
  without this.

This comes from d19fbc3c17 ("Documentation: add git user's manual",
2007-01-07), where it looks like this conf file in general and this
snippet in particular was copy-pasted from asciidoc.conf.

This chunk is very similar to something we just got rid of for the
manpages, and because this appears to be aimed at v1.68 -- which we no
longer support for the manpages as of a few commits ago --, it's
tempting to get rid of this. That reveals an interesting aspect of
"works with or without this": it turns out it actually works /better/
without!

Dropping this makes us render code snippets and shell listings using
<screen> rather than <literallayout>, just like Asciidoctor does. In
user-manual.pdf, this puts the contents into dimmed-background,
easy-to-distinguish-from-the-surrounding-text boxes, as opposed to
white-background (transparent) boxes.

Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-31 16:08:02 -07:00
Johannes Schindelin
e3f53ce5bd MyFirstObjectWalk: remove unnecessary conditional statement
In the given example, `commit` cannot be `NULL` (because this is the
loop condition: if it was `NULL`, the loop body would not be entered at
all). It took this developer a moment or two to see that this is
therefore dead code.

Let's remove it, to avoid puzzling future readers.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Reviewed-by: Emily Shaffer <emilyshaffer@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-30 11:16:41 -07:00
brian m. carlson
2149b6748f docs: add a FAQ
Git is an enormously flexible and powerful piece of software.  However,
it can be intimidating for many users and there are a set of common
questions that users often ask.  While we already have some new user
documentation, it's worth adding a FAQ to address common questions that
users often have.  Even though some of this is addressed elsewhere in
the documentation, experience has shown that it is difficult for users
to find, so a centralized location is helpful.

Add such a FAQ and fill it with some common questions and answers.
While there are few entries now, we can expand it in the future to cover
more things as we find new questions that users have.  Let's also add
section markers so that people answering questions can directly link
users to the proper answer.

The FAQ also addresses common configuration questions that apply not
only to Git as an independent piece of software but also the ecosystem
of CI tools and hosting providers that people use, since these are the
source of common questions.  An attempt has been made to avoid
mentioning any particular provider or tool, but to nevertheless cover
common configurations that apply to a wide variety of such tools.

Note that the long lines for certain questions are required, since
Asciidoctor does not permit broken lines there.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-30 10:39:48 -07:00
Junio C Hamano
9fadedd637 Merge branch 'ds/default-pack-use-sparse-to-true'
The 'pack.useSparse' configuration variable now defaults to 'true',
enabling an optimization that has been experimental since Git 2.21.

* ds/default-pack-use-sparse-to-true:
  pack-objects: flip the use of GIT_TEST_PACK_SPARSE
  config: set pack.useSparse=true by default
2020-03-29 09:32:51 -07:00
Martin Ågren
f7421a1438 manpage-normal.xsl: fold in manpage-base.xsl
After an earlier commit, we only include manpage-base.xsl from a single
file, manpage-normal.xsl. Fold the former into the latter.

We only ever needed the "base, normal and non-normal" construct to
support a single non-normal case, namely to work around issues with
docbook-xsl 1.72 handling backslashes and dots. If we ever need
something like this again, we can re-introduce manpage-base.xsl and
friends. Whatever issue we'd be trying to work around, it probably
wouldn't involve dots and backslashes like this, anyway.

Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-29 09:25:38 -07:00
Martin Ågren
4344be057e manpage-bold-literal.xsl: stop using git.docbook.backslash
We used to assign git.docbook.backslash one of two different values --
one "normal" and one for working around a problem with docbook-xsl 1.72.
After the previous commit, we don't support that version anymore and
always use the "normal" value, a literal backslash.

Just explicitly use a backslash instead of using git.docbook.backslash.
The next commit will drop the definition of git.docbook.backslash
entirely.

Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-29 09:25:38 -07:00
Martin Ågren
388f5b52b0 Doc: drop support for docbook-xsl before 1.73.0
Drop the DOCBOOK_XSL_172 config knob, which was needed with docbook-xsl
1.72 (but neither 1.71 nor 1.73). Version 1.73.0 is more than twelve
years old.

Together with the last few commits, we are now at a point where we don't
have any Makefile knobs to cater to old/broken versions of docbook-xsl.

Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-29 09:25:38 -07:00
Martin Ågren
40b970078b Doc: drop support for docbook-xsl before 1.72.0
docbook-xsl 1.72.0 is thirteen years old. Drop the ASCIIDOC_ROFF knob
which was needed to support 1.68.1 - 1.71.1. The next commit will
increase the required/assumed version further.

Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-29 09:25:38 -07:00
Martin Ågren
def3ce00ae Doc: drop support for docbook-xsl before 1.71.1
Drop the DOCBOOK_SUPPRESS_SP mechanism, which needs to be used with
docbook-xsl versions 1.69.1 through 1.71.0.

We probably broke this for Asciidoctor builds in f6461b82b9
("Documentation: fix build with Asciidoctor 2", 2019-09-15). That is, we
should/could fix this similar to 55aca515eb ("manpage-bold-literal.xsl:
match for namespaced "d:literal" in template", 2019-10-31). But rather
than digging out such an old version of docbook-xsl to test that, let's
just use this as an excuse for dropping this decade-old workaround.

DOCBOOK_SUPPRESS_SP was not needed with docbook-xsl 1.69.0 and older.
Maybe such old versions still work fine on our docs, or maybe not. Let's
just refer to everything before 1.71.1 as "not supported". The next
commit will increase the required/assumed version further.

Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-29 09:25:38 -07:00
Junio C Hamano
78725ebda9 CodingGuidelines: allow ${#posix} == strlen($posix)
The construct has been in POSIX for the past 10+ years, and we have
used in t9xxx (subversion) series of the tests, so we know it is at
portable across systems that people have run those tests, which is
almost everything we'd care about.

Let's loosen the rule; luckily, the check-non-portable-shell script
does not have any rule to find its use, so the only change needed is
a removal of one paragraph from the documentation.

Helped-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-29 08:41:54 -07:00
Philippe Blain
344420bf0f git-rebase.txt: fix typo
Signed-off-by: Philippe Blain <levraiphilippeblain@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-28 18:14:33 -07:00
René Scharfe
f05558f3e2 pull: remove --update-head-ok from documentation
'git pull' implicitly passes --update-head-ok to 'git fetch', but
doesn't itself accept that option from users.  That makes sense, as it
wouldn't work without the possibility to update HEAD.  Remove the option
from the command's documentation to match its actual behavior.

Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-28 18:13:09 -07:00
Junio C Hamano
3bab5d5625 The second batch post 2.26 cycle
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-26 17:11:21 -07:00
Junio C Hamano
369ae7567a Merge branch 'tg/retire-scripted-stash'
"git stash" has kept an escape hatch to use the scripted version
for a few releases, which got stale.  It has been removed.

* tg/retire-scripted-stash:
  stash: remove the stash.useBuiltin setting
  stash: get git_stash_config at the top level
2020-03-26 17:11:21 -07:00
Junio C Hamano
f8cb64e3d4 Merge branch 'bc/sha-256-part-1-of-4'
SHA-256 transition continues.

* bc/sha-256-part-1-of-4: (22 commits)
  fast-import: add options for rewriting submodules
  fast-import: add a generic function to iterate over marks
  fast-import: make find_marks work on any mark set
  fast-import: add helper function for inserting mark object entries
  fast-import: permit reading multiple marks files
  commit: use expected signature header for SHA-256
  worktree: allow repository version 1
  init-db: move writing repo version into a function
  builtin/init-db: add environment variable for new repo hash
  builtin/init-db: allow specifying hash algorithm on command line
  setup: allow check_repository_format to read repository format
  t/helper: make repository tests hash independent
  t/helper: initialize repository if necessary
  t/helper/test-dump-split-index: initialize git repository
  t6300: make hash algorithm independent
  t6300: abstract away SHA-1-specific constants
  t: use hash-specific lookup tables to define test constants
  repository: require a build flag to use SHA-256
  hex: add functions to parse hex object IDs in any algorithm
  hex: introduce parsing variants taking hash algorithms
  ...
2020-03-26 17:11:20 -07:00
Junio C Hamano
a7d14a4428 The first batch post 2.26 cycle
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-25 13:57:44 -07:00
Junio C Hamano
1ee4ac28a8 Merge branch 'jc/config-tar'
Improve the structure of the documentation source a bit.

* jc/config-tar:
  separate tar.* config to its own source file
2020-03-25 13:57:44 -07:00
Junio C Hamano
ab8ef92027 Merge branch 'rs/doc-passthru-fetch-options'
Doc update.

* rs/doc-passthru-fetch-options:
  pull: document more passthru options
2020-03-25 13:57:43 -07:00
Junio C Hamano
52f26018c8 Merge branch 'jc/maintain-doc'
Doc update.

* jc/maintain-doc:
  update how-to-maintain-git
2020-03-25 13:57:42 -07:00
Junio C Hamano
aaa625567a Merge branch 'js/https-proxy-config'
A handful of options to configure SSL when talking to proxies have
been added.

* js/https-proxy-config:
  http: add environment variable support for HTTPS proxies
  http: add client cert support for HTTPS proxies
2020-03-25 13:57:42 -07:00
Junio C Hamano
de49261b05 Git 2.26.1
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-25 13:07:47 -07:00
Josh Steadmon
3d3adaad91 trace2: teach Git to log environment variables
Via trace2, Git can already log interesting config parameters (see the
trace2_cmd_list_config() function). However, this can grant an
incomplete picture because many config parameters also allow overrides
via environment variables.

To allow for more complete logs, we add a new trace2_cmd_list_env_vars()
function and supporting implementation, modeled after the pre-existing
config param logging implementation.

Signed-off-by: Josh Steadmon <steadmon@google.com>
Acked-by: Jeff Hostetler <jeffhost@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-23 13:14:53 -07:00
Derrick Stolee
4a465443a6 clone: document --filter options
It turns out that the "--filter=<filter-spec>" option is not
documented anywhere in the "git clone" page, and instead is
detailed carefully in "git rev-list" where it serves a
different purpose.

Add a small bit about this option in the documentation. It
would be worth some time to create a subsection in the "git clone"
documentation about partial clone as a concept and how it can be
a surprising experience. For example, "git checkout" will likely
trigger a pack download.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-22 16:38:30 -07:00
Derrick Stolee
de3a864114 config: set pack.useSparse=true by default
The pack.useSparse config option was introduced by 3d036eb0
(pack-objects: create pack.useSparse setting, 2019-01-19) and was
first available in v2.21.0. When enabled, the pack-objects process
during 'git push' will use a sparse tree walk when deciding which
trees and blobs to send to the remote. The algorithm was introduced
by d5d2e93 (revision: implement sparse algorithm, 2019-01-16) and
has been in production use by VFS for Git since around that time.
The features.experimental config option also enabled pack.useSparse,
so hopefully that has also increased exposure.

It is worth noting that pack.useSparse has a possibility of
sending more objects across a push, but requires a special
arrangement of exact _copies_ across directories. There is a test
in t5322-pack-objects-sparse.sh that demonstrates this possibility.
This test uses the --sparse option to "git pack-objects" but we
can make it implied by the config value to demonstrate that the
default value has changed.

While updating that test, I noticed that the documentation did not
include an option for --no-sparse, which is now more important than
it was before.

Since the downside is unlikely but the upside is significant, set
the default value of pack.useSparse to true. Remove it from the
set of options implied by features.experimental.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-20 14:22:31 -07:00
Elijah Newren
7fcb965970 RelNotes/2.26.0: fix various typos
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-18 15:42:37 -07:00
Junio C Hamano
8312aa7d74 separate tar.* config to its own source file
Even though there is only one configuration variable in the
namespace, it is not quite right to have tar.umask described
among the variables for tag.* namespace.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-18 12:42:09 -07:00
Junio C Hamano
67b0a24910 Git 2.25.3
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-17 18:12:01 -07:00
Junio C Hamano
be8661a328 Git 2.25.2
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Sync with Git 2.25.2

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-17 15:27:15 -07:00
Junio C Hamano
0822e66b5d Git 2.25.2
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-17 15:06:37 -07:00
Junio C Hamano
221887a492 Merge branch 'jk/doc-credential-helper' into maint
Docfix.

* jk/doc-credential-helper:
  doc: move credential helper info into gitcredentials(7)
2020-03-17 15:02:26 -07:00
Junio C Hamano
fda2baffd2 Merge branch 'jc/doc-single-h-is-for-help' into maint
Both "git ls-remote -h" and "git grep -h" give short usage help,
like any other Git subcommand, but it is not unreasonable to expect
that the former would behave the same as "git ls-remote --head"
(there is no other sensible behaviour for the latter).  The
documentation has been updated in an attempt to clarify this.

* jc/doc-single-h-is-for-help:
  Documentation: clarify that `-h` alone stands for `help`
2020-03-17 15:02:24 -07:00
Junio C Hamano
16a4bf1035 Merge branch 'en/check-ignore' into maint
"git check-ignore" did not work when the given path is explicitly
marked as not ignored with a negative entry in the .gitignore file.

* en/check-ignore:
  check-ignore: fix documentation and implementation to match
2020-03-17 15:02:23 -07:00
Junio C Hamano
3246495a5c Merge branch 'jk/push-option-doc-markup-fix' into maint
Doc markup fix.

* jk/push-option-doc-markup-fix:
  doc/config/push: use longer "--" line for preformatted example
2020-03-17 15:02:22 -07:00
Junio C Hamano
56f97d5896 Merge branch 'jk/doc-diff-parallel' into maint
Update to doc-diff.

* jk/doc-diff-parallel:
  doc-diff: use single-colon rule in rendering Makefile
2020-03-17 15:02:22 -07:00
Junio C Hamano
506223f9c5 Git 2.24.2
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-17 14:36:45 -07:00
Junio C Hamano
17a02783d8 Git 2.23.2
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-17 14:33:34 -07:00
Junio C Hamano
69fab82147 Git 2.22.3
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-17 14:24:55 -07:00
Junio C Hamano
fe22686494 Git 2.21.2
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-17 14:16:08 -07:00
Junio C Hamano
d1259ce117 Git 2.20.3
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-17 13:46:10 -07:00
Junio C Hamano
a5979d7009 Git 2.19.4
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-17 13:43:08 -07:00
Junio C Hamano
21a3e5016b Git 2.18.3
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-17 13:34:12 -07:00
Junio C Hamano
c42c0f1297 Git 2.17.4
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-17 13:25:33 -07:00
Junio C Hamano
88acccda38 log: give --[no-]use-mailmap a more sensible synonym --[no-]mailmap
The option name "--use-mailmap" looks OK, but it becomes awkward
when you have to negate it, i.e. "--no-use-mailmap".  I, perhaps
with many other users, always try "--no-mailmap" and become unhappy
to see it fail.

Add an alias "--[no-]mailmap" to remedy this.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-16 14:27:07 -07:00
Junio C Hamano
6c85aac65f Git 2.26-rc2
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-16 12:46:32 -07:00
Junio C Hamano
30e9940356 Hopefully the final batch before -rc2
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-12 14:36:00 -07:00
Junio C Hamano
b4f0038525 Merge branch 'en/rebase-backend'
Band-aid fixes for two fallouts from switching the default "rebase"
backend.

* en/rebase-backend:
  git-rebase.txt: highlight backend differences with commit rewording
  sequencer: clear state upon dropping a become-empty commit
  i18n: unmark a message in rebase.c
2020-03-12 14:28:01 -07:00
Elijah Newren
120b1eb731 git-rebase.txt: highlight backend differences with commit rewording
As noted by Junio:
    Back when "git am" was written, it was not considered a bug that the
    "git am --resolved" option did not offer the user a chance to update
    the log message to match the adjustment of the code the user made,
    but honestly, I'd have to say that it is a bug in "git am" in that
    over time it wasn't adjusted to the new world order where we
    encourage users to describe what they did when the automation
    hiccuped by opening an editor.  These days, even when automation
    worked well (e.g. a clean auto-merge with "git merge"), we open an
    editor.  The world has changed, and so should the expectations.

Junio also suggested providing a workaround such as allowing --no-edit
together with git rebase --continue, but that should probably be done in
a patch after the git-2.26.0 release.  For now, just document the known
difference in the Behavioral Differences section.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-11 12:11:08 -07:00
René Scharfe
9c688735f6 pull: document more passthru options
git pull accepts the options --dry-run, -p/--prune, --refmap, and
-t/--tags since a32975f516 (pull: pass git-fetch's options to git-fetch,
2015-06-18), -j/--jobs since 62104ba14a (submodules: allow parallel
fetching, add tests and documentation, 2015-12-15), and --set-upstream
since 24bc1a1292 (pull, fetch: add --set-upstream option, 2019-08-19).
Update its documentation to match.

Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-11 11:29:14 -07:00
Junio C Hamano
cdef998b46 Merge branch 'jc/doc-single-h-is-for-help'
Both "git ls-remote -h" and "git grep -h" give short usage help,
like any other Git subcommand, but it is not unreasonable to expect
that the former would behave the same as "git ls-remote --head"
(there is no other sensible behaviour for the latter).  The
documentation has been updated in an attempt to clarify this.

* jc/doc-single-h-is-for-help:
  Documentation: clarify that `-h` alone stands for `help`
2020-03-11 10:58:16 -07:00
Junio C Hamano
b4374e96c8 Git 2.26-rc1
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-09 11:21:21 -07:00
Junio C Hamano
0e0d717537 Merge branch 'pb/am-show-current-patch'
"git am --short-current-patch" is a way to show the piece of e-mail
for the stopped step, which is not suitable to directly feed "git
apply" (it is designed to be a good "git am" input).  It learned a
new option to show only the patch part.

* pb/am-show-current-patch:
  am: support --show-current-patch=diff to retrieve .git/rebase-apply/patch
  am: support --show-current-patch=raw as a synonym for--show-current-patch
  am: convert "resume" variable to a struct
  parse-options: convert "command mode" to a flag
  parse-options: add testcases for OPT_CMDMODE()
2020-03-09 11:21:19 -07:00
Junio C Hamano
9b7f726dfc Merge branch 'am/pathspec-f-f-more'
"git rm" and "git stash" learns the new "--pathspec-from-file"
option.

* am/pathspec-f-f-more:
  stash push: support the --pathspec-from-file option
  stash: eliminate crude option parsing
  doc: stash: synchronize <pathspec> description
  doc: stash: document more options
  doc: stash: split options from description (2)
  doc: stash: split options from description (1)
  rm: support the --pathspec-from-file option
  doc: rm: synchronize <pathspec> description
2020-03-09 11:21:19 -07:00
Junio C Hamano
564956f358 update how-to-maintain-git
Some parts of the workflow described in the document has got a bit
stale with the recent toolchain improvements.  Update the procedure
a bit, and also describe the convention used around SQUASH??? fixups.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-09 07:57:57 -07:00
Thomas Gummerer
8a2cd3f512 stash: remove the stash.useBuiltin setting
Remove the stash.useBuiltin setting which was added as an escape hatch
to disable the builtin version of stash first released with Git 2.22.

Carrying the legacy version is a maintenance burden, and has in fact
become out of date failing a test since the 2.23 release, without
anyone noticing until now.  So users would be getting a hint to fall
back to a potentially buggy version of the tool.

We used to shell out to git config to get the useBuiltin configuration
to avoid changing any global state before spawning legacy-stash.
However that is no longer necessary, so just use the 'git_config'
function to get the setting instead.

Similar to what we've done in d03ebd411c ("rebase: remove the
rebase.useBuiltin setting", 2019-03-18), where we remove the
corresponding setting for rebase, we leave the documentation in place,
so people can refer back to it when searching for it online, and so we
can refer to it in the commit message.

Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-05 12:50:28 -08:00
Jorge Lopez Silva
af026519c9 http: add environment variable support for HTTPS proxies
Add 4 environment variables that can be used to configure the proxy
cert, proxy ssl key, the proxy cert password protected flag, and the
CA info for the proxy.

Documentation for the options was also updated.

Signed-off-by: Jorge Lopez Silva <jalopezsilva@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-05 12:26:14 -08:00
Jorge Lopez Silva
88238e02d5 http: add client cert support for HTTPS proxies
Git supports performing connections to HTTPS proxies, but we don't
support doing mutual authentication with them (through TLS).

Add the necessary options to be able to send a client certificate to
the HTTPS proxy.

A client certificate can provide an alternative way of authentication
instead of using 'ProxyAuthorization' or other more common methods of
authentication.  Libcurl supports this functionality already, so changes
are somewhat minimal. The feature is guarded by the first available
libcurl version that supports these options.

4 configuration options are added and documented, cert, key, cert
password protected and CA info. The CA info should be used to specify a
different CA path to validate the HTTPS proxy cert.

Signed-off-by: Jorge Lopez Silva <jalopezsilva@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-05 12:25:09 -08:00
Junio C Hamano
076cbdcd73 Git 2.26-rc0
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-05 11:15:45 -08:00
Junio C Hamano
b22db265d6 Merge branch 'es/recursive-single-branch-clone'
"git clone --recurse-submodules --single-branch" now uses the same
single-branch option when cloning the submodules.

* es/recursive-single-branch-clone:
  clone: pass --single-branch during --recurse-submodules
  submodule--helper: use C99 named initializer
2020-03-05 10:43:03 -08:00
Junio C Hamano
2cbb058669 Merge branch 'bc/wildcard-credential'
A configuration element used for credential subsystem can now use
wildcard pattern to specify for which set of URLs the entry
applies.

* bc/wildcard-credential:
  credential: allow wildcard patterns when matching config
  credential: use the last matching username in the config
  t0300: add tests for some additional cases
  t1300: add test for urlmatch with multiple wildcards
  mailmap: add an additional email address for brian m. carlson
2020-03-05 10:43:02 -08:00
Junio C Hamano
f4d7dfce4d Merge branch 'ds/sparse-add'
"git sparse-checkout" learned a new "add" subcommand.

* ds/sparse-add:
  sparse-checkout: allow one-character directories in cone mode
  sparse-checkout: work with Windows paths
  sparse-checkout: create 'add' subcommand
  sparse-checkout: extract pattern update from 'set' subcommand
  sparse-checkout: extract add_patterns_from_input()
2020-03-05 10:43:02 -08:00
Junio C Hamano
2f268890c2 The eighth batch for 2.26
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-03-02 15:07:40 -08:00
Junio C Hamano
8c22bd9ff9 Merge branch 'en/rebase-backend'
"git rebase" has learned to use the merge backend (i.e. the
machinery that drives "rebase -i") by default, while allowing
"--apply" option to use the "apply" backend (e.g. the moral
equivalent of "format-patch piped to am").  The rebase.backend
configuration variable can be set to customize.

* en/rebase-backend:
  rebase: rename the two primary rebase backends
  rebase: change the default backend from "am" to "merge"
  rebase: make the backend configurable via config setting
  rebase tests: repeat some tests using the merge backend instead of am
  rebase tests: mark tests specific to the am-backend with --am
  rebase: drop '-i' from the reflog for interactive-based rebases
  git-prompt: change the prompt for interactive-based rebases
  rebase: add an --am option
  rebase: move incompatibility checks between backend options a bit earlier
  git-rebase.txt: add more details about behavioral differences of backends
  rebase: allow more types of rebases to fast-forward
  t3432: make these tests work with either am or merge backends
  rebase: fix handling of restrict_revision
  rebase: make sure to pass along the quiet flag to the sequencer
  rebase, sequencer: remove the broken GIT_QUIET handling
  t3406: simplify an already simple test
  rebase (interactive-backend): fix handling of commits that become empty
  rebase (interactive-backend): make --keep-empty the default
  t3404: directly test the behavior of interest
  git-rebase.txt: update description of --allow-empty-message
2020-03-02 15:07:19 -08:00
Junio C Hamano
cb2f5a8e97 Merge branch 'en/check-ignore'
"git check-ignore" did not work when the given path is explicitly
marked as not ignored with a negative entry in the .gitignore file.

* en/check-ignore:
  check-ignore: fix documentation and implementation to match
2020-03-02 15:07:18 -08:00
Junio C Hamano
80648bb3f2 Merge branch 'jk/push-option-doc-markup-fix'
Doc markup fix.

* jk/push-option-doc-markup-fix:
  doc/config/push: use longer "--" line for preformatted example
2020-03-02 15:07:18 -08:00
Junio C Hamano
29b09c518c Merge branch 'jk/doc-diff-parallel'
Update to doc-diff.

* jk/doc-diff-parallel:
  doc-diff: use single-colon rule in rendering Makefile
2020-03-02 15:07:17 -08:00
brian m. carlson
1bdca81641 fast-import: add options for rewriting submodules
When converting a repository using submodules from one hash algorithm to
another, it is necessary to rewrite the submodules from the old
algorithm to the new algorithm, since only references to submodules, not
their contents, are written to the fast-export stream. Without rewriting
the submodules, fast-import fails with an "Invalid dataref" error when
encountering a submodule in another algorithm.

Add a pair of options, --rewrite-submodules-from and
--rewrite-submodules-to, that take a list of marks produced by
fast-export and fast-import, respectively, when processing the
submodule. Use these marks to map the submodule commits from the old
algorithm to the new algorithm.

We read marks into two corresponding struct mark_set objects and then
perform a mapping from the old to the new using a hash table. This lets
us reuse the same mark parsing code that is used elsewhere and allows us
to efficiently read and match marks based on their ID, since mark files
need not be sorted.

Note that because we're using a khash table for the object IDs, and this
table copies values of struct object_id instead of taking references to
them, it's necessary to zero the struct object_id values that we use to
insert and look up in the table. Otherwise, we would end up with SHA-1
values that don't match because of whatever stack garbage might be left
in the unused area.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-28 09:53:41 -08:00
Junio C Hamano
1ff466c018 Documentation: clarify that -h alone stands for help
We seem to be getting new users who get confused every 20 months or
so with this "-h consistently wants to give help, but the commands
to which `-h` may feel like a good short-form option want it to mean
something else." compromise.

Let's make sure that the readers know that `git cmd -h` (with no
other arguments) is a way to get usage text, even for commands like
ls-remote and grep.

Also extend the description that is already in gitcli.txt, as it is
clear that users still get confused with the current text.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-27 14:14:01 -08:00
Junio C Hamano
2d2118b814 The seventh batch for 2.26
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-25 11:18:32 -08:00
Junio C Hamano
325eb66830 Merge branch 'es/doc-mentoring'
Doc for new contributors.

* es/doc-mentoring:
  MyFirstContribution: rephrase contact info
  MyFirstContribution: add avenues for getting help
2020-02-25 11:18:32 -08:00
Junio C Hamano
87f17d790d Merge branch 'es/bright-colors'
The basic 7 colors learned the brighter counterparts
(e.g. "brightred").

* es/bright-colors:
  color.c: alias RGB colors 8-15 to aixterm colors
  color.c: support bright aixterm colors
  color.c: refactor color_output arguments
2020-02-25 11:18:32 -08:00
Junio C Hamano
d0038f4b31 Merge branch 'bw/remote-rename-update-config'
"git remote rename X Y" needs to adjust configuration variables
(e.g. branch.<name>.remote) whose value used to be X to Y.
branch.<name>.pushRemote is now also updated.

* bw/remote-rename-update-config:
  remote rename/remove: gently handle remote.pushDefault config
  config: provide access to the current line number
  remote rename/remove: handle branch.<name>.pushRemote config values
  remote: clean-up config callback
  remote: clean-up by returning early to avoid one indentation
  pull --rebase/remote rename: document and honor single-letter abbreviations rebase types
2020-02-25 11:18:32 -08:00
Emily Shaffer
132f600b06 clone: pass --single-branch during --recurse-submodules
Previously, performing "git clone --recurse-submodules --single-branch"
resulted in submodules cloning all branches even though the superproject
cloned only one branch. Pipe --single-branch through the submodule
helper framework to make it to 'clone' later on.

Signed-off-by: Emily Shaffer <emilyshaffer@google.com>
Acked-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-25 10:00:38 -08:00
brian m. carlson
3c9331a129 builtin/init-db: add environment variable for new repo hash
For the foreseeable future, SHA-1 will be the default algorithm for Git.
However, when running the testsuite, we want to be able to test an
arbitrary algorithm. It would be quite burdensome and very untidy to
have to specify the algorithm we'd like to test every time we
initialized a new repository somewhere in the testsuite, so add an
environment variable to allow us to specify the default hash algorithm
for Git.

This has the benefit that we can set it once for the entire testsuite
and not have to think about it. In the future, users can also use it to
set the default for their repositories if they would like to do so.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-24 09:33:29 -08:00
brian m. carlson
8b8f7189df builtin/init-db: allow specifying hash algorithm on command line
Allow the user to specify the hash algorithm on the command line by
using the --object-format option to git init.  Validate that the user is
not attempting to reinitialize a repository with a different hash
algorithm.  Ensure that if we are writing a non-SHA-1 repository that we
set the repository version to 1 and write the objectFormat extension.

Restrict this option to work only when ENABLE_SHA256 is set until the
codebase is in a situation to fully support this.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-24 09:33:27 -08:00
Paolo Bonzini
aa416b22ea am: support --show-current-patch=diff to retrieve .git/rebase-apply/patch
When "git am --show-current-patch" was added in commit 984913a210 ("am:
add --show-current-patch", 2018-02-12), "git am" started recommending it
as a replacement for .git/rebase-merge/patch.  Unfortunately the suggestion
is somewhat misguided; for example, the output of "git am --show-current-patch"
cannot be passed to "git apply" if it is encoded as quoted-printable
or base64.  Add a new mode to "git am --show-current-patch" in order to
straighten the suggestion.

Reported-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-20 13:20:41 -08:00
Paolo Bonzini
f3b4822899 am: support --show-current-patch=raw as a synonym for--show-current-patch
When "git am --show-current-patch" was added in commit 984913a210 ("am:
add --show-current-patch", 2018-02-12), "git am" started recommending it
as a replacement for .git/rebase-merge/patch.  Unfortunately the suggestion
is somewhat misguided; for example, the output "git am --show-current-patch"
cannot be passed to "git apply" if it is encoded as quoted-printable or
base64.  To simplify worktree operations and to avoid that users poke into
.git, it would be better if "git am" also provided a mode that copies
.git/rebase-merge/patch to stdout.

One possibility could be to have completely separate options, introducing
for example --show-current-message (for .git/rebase-apply/NNNN)
and --show-current-diff (for .git/rebase-apply/patch), while possibly
deprecating --show-current-patch.

That would even remove the need for the first two patches in the series.
However, the long common prefix would have prevented using an abbreviated
option such as "--show".  Therefore, I chose instead to add a string
argument to --show-current-patch.  The new argument is optional, so that
"git am --show-current-patch"'s behavior remains backwards-compatible.

The next choice to make is how to handle multiple --show-current-patch
options.  Right now, something like "git am --abort --show-current-patch"
is rejected, and the previous suggestion would likewise have naturally
rejected a command line like

	git am --show-current-message --show-current-diff

Therefore, I decided to also reject for example

	git am --show-current-patch=diff --show-current-patch=raw

In other words the whole of --show-current-patch=xxx (including the
optional argument) is treated as the command mode.  I found this to be
more consistent and intuitive, even though it differs from the usual
"last one wins" semantics of the git command line.

Add the code to parse submodes based on the above design, where for now
"raw" is the only valid submode.  "raw" prints the full e-mail message
just like "git am --show-current-patch".

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-20 13:20:40 -08:00
brian m. carlson
46fd7b3900 credential: allow wildcard patterns when matching config
In some cases, a user will want to use a specific credential helper for
a wildcard pattern, such as https://*.corp.example.com.  We have code
that handles this already with the urlmatch code, so let's use that
instead of our custom code.

Since the urlmatch code is a superset of our current matching in terms
of capabilities, there shouldn't be any cases of things that matched
previously that don't match now.  However, in addition to wildcard
matching, we now use partial path matching, which can cause slightly
different behavior in the case that a helper applies to the prefix
(considering path components) of the remote URL.  While different, this
is probably the behavior people were wanting anyway.

Since we're using the urlmatch code, we need to encode the components
we've gotten into a URL to match, so add a function to percent-encode
data and format the URL with it.  We now also no longer need to the
custom code to match URLs, so let's remove it.

Additionally, the urlmatch code always looks for the best match, whereas
we want all matches for credential helpers to preserve existing
behavior.  Let's add an optional field, select_fn, that lets us control
which items we want (in this case, all of them) and default it to the
best-match code that already exists for other users.

Signed-off-by: brian m. carlson <bk2204@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-20 13:05:43 -08:00
Alexandr Miloslavskiy
8a98758a8d stash push: support the --pathspec-from-file option
Decisions taken for simplicity:
1) For now, `--pathspec-from-file` is declared incompatible with
   `--patch`, even when <file> is not `-`. Such use case is not
   really expected.
2) It is not allowed to pass pathspec in both args and file.

Signed-off-by: Alexandr Miloslavskiy <alexandr.miloslavskiy@syntevo.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-19 10:56:49 -08:00
Alexandr Miloslavskiy
3f3d8068f5 doc: stash: synchronize <pathspec> description
This patch continues the effort that is already applied to
`git commit`, `git reset`, `git checkout` etc.

1) Added reference to 'linkgit:gitglossary[7]'.
2) Fixed mentions of incorrectly plural "pathspecs".

Signed-off-by: Alexandr Miloslavskiy <alexandr.miloslavskiy@syntevo.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-19 10:56:49 -08:00
Alexandr Miloslavskiy
b22909144c doc: stash: document more options
Signed-off-by: Alexandr Miloslavskiy <alexandr.miloslavskiy@syntevo.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-19 10:56:49 -08:00
Alexandr Miloslavskiy
0093abc286 doc: stash: split options from description (2)
Together with the previous patch, this brings docs for `git stash` to
the common layout used for most other commands (see for example docs
for `git add`, `git commit`, `git checkout`, `git reset`) where all
options are documented in a separate list.

After some thinking and having a look at docs for `git svn` and
`git `submodule`, I have arrived at following conclusions:
  * Options should be described in a list rather then text to
    facilitate lookup for user.
  * Single list is better then multiple lists because it avoids
    copy&pasting descriptions between subcommands (or, without
    copy&pasting, user will have to look up missing options in other
    subcommands).
  * As a consequence, commands section should only give brief info and
    list possible options. Since options have good enough names, user
	will only need to look up the "interesting" options.
  * Every option should list which subcommands support it.

I have decided to use alphabetical sorting in the list of options to
facilitate lookup for user.

There is some text editing done to make old descriptions better fit
into the list-style format.

Signed-off-by: Alexandr Miloslavskiy <alexandr.miloslavskiy@syntevo.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-19 10:56:49 -08:00
Alexandr Miloslavskiy
2b7460d167 doc: stash: split options from description (1)
This patch moves blocks of text as-is to make it easier to review the
next patch.

Signed-off-by: Alexandr Miloslavskiy <alexandr.miloslavskiy@syntevo.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-19 10:56:49 -08:00
Alexandr Miloslavskiy
5f393dc3aa rm: support the --pathspec-from-file option
Decisions taken for simplicity:
1) It is not allowed to pass pathspec in both args and file.

Adjustments were needed for `if (!argc)` block:

This code actually means "pathspec is not present". Previously, pathspec
could only come from commandline arguments, so testing for `argc` was a
valid way of testing for the presence of pathspec. But this is no longer
true with `--pathspec-from-file`.

During the entire `--pathspec-from-file` story, I tried to keep its
behavior very close to giving pathspec on commandline, so that switching
from one to another doesn't involve any surprises.

However, throwing usage at user in the case of empty
`--pathspec-from-file` would puzzle because there's nothing wrong with
"usage" (that is, argc/argv array).

On the other hand, throwing usage in the old case also feels bad to me.
While it's less of a puzzle, I (as user) never liked the experience of
comparing my commandline to "usage", trying to spot a difference. Since
it's already known what the error is, it feels a lot better to give that
specific error to user.

Judging from [1] it doesn't seem that showing usage in this case was
important (the patch was to avoid segfault), and it doesn't fit into how
other commands react to empty pathspec (see for example `git add` with a
custom message).

Therefore, I decided to show new error text in both cases. In order to
continue testing for error early, I moved `parse_pathspec()` higher. Now
it happens before `read_cache()` / `hold_locked_index()` /
`setup_work_tree()`, which shouldn't cause any issues.

[1] Commit 7612a1ef ("git-rm: honor -n flag" 2006-06-09)

Signed-off-by: Alexandr Miloslavskiy <alexandr.miloslavskiy@syntevo.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-19 10:56:49 -08:00
Elijah Newren
7ec8125fba check-ignore: fix documentation and implementation to match
check-ignore has two different modes, and neither of these modes has an
implementation that matches the documentation.  These modes differ in
whether they just print paths or whether they also print the final
pattern matched by the path.  The fix is different for both modes, so
I'll discuss both separately.

=== First (default) mode ===

The first mode is documented as:

    For each pathname given via the command-line or from a file via
    --stdin, check whether the file is excluded by .gitignore (or other
    input files to the exclude mechanism) and output the path if it is
    excluded.

However, it fails to do this because it did not account for negated
patterns.  Commands other than check-ignore verify exclusion rules via
calling

   ... -> treat_one_path() -> is_excluded() -> last_matching_pattern()

while check-ignore has a call path of the form:

   ... -> check_ignore()                    -> last_matching_pattern()

The fact that the latter does not include the call to is_excluded()
means that it is susceptible to to messing up negated patterns (since
that is the only significant thing is_excluded() adds over
last_matching_pattern()).  Unfortunately, we can't make it just call
is_excluded(), because the same codepath is used by the verbose mode
which needs to know the matched pattern in question.  This brings us
to...

=== Second (verbose) mode ===

The second mode, known as verbose mode, references the first in the
documentation and says:

    Also output details about the matching pattern (if any) for each
    given pathname. For precedence rules within and between exclude
    sources, see gitignore(5).

The "Also" means it will print patterns that match the exclude rules as
noted for the first mode, and also print which pattern matches.  Unless
more information is printed than just pathname and pattern (which is not
done), this definition is somewhat ill-defined and perhaps even
self-contradictory for negated patterns: A path which matches a negated
exclude pattern is NOT excluded and thus shouldn't be printed by the
former logic, while it certainly does match one of the explicit patterns
and thus should be printed by the latter logic.

=== Resolution ==

Since the second mode exists to find out which pattern matches given
paths, and showing the user a pattern that begins with a '!' is
sufficient for them to figure out whether the pattern is excluded, the
existing behavior is desirable -- we just need to update the
documentation to match the implementation (i.e. it is about printing
which pattern is matched by paths, not about showing which paths are
excluded).

For the first or default mode, users just want to know whether a pattern
is excluded.  As such, the existing documentation is desirable; change
the implementation to match the documented behavior.

Finally, also adjust a few tests in t0008 that were caught up by this
discrepancy in how negated paths were handled.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-18 15:28:58 -08:00
Jeff King
2607d39da3 doc-diff: use single-colon rule in rendering Makefile
When rendering the troff manpages to text via "man", we create an ad-hoc
Makefile and feed it to "make". The purpose here is two-fold:

  - reuse results from a prior interrupted render of the same tree

  - use make's -j option to build in parallel

But the second part doesn't seem to work (at least with my version of
GNU make, 4.2.1). It just runs one render at a time.

We use a double-colon "all" rule for each file, like:

  all:: foo
  foo:
    ...actual render recipe...
  all:: bar
  bar:
    ...actual render recipe...
  ...and so on...

And it's this double-colon that seems to inhibit the parallelism. We can
just switch to a regular single-colon rule. Even though we do have
multiple rules for "all" here, we don't have any recipe to execute for
"all" (we only care about triggering its dependencies), so the
distinction is irrelevant.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-18 13:53:30 -08:00
Jeff King
0aa6ce3094 doc/config/push: use longer "--" line for preformatted example
The example for the push.pushOption config tries to create a
preformatted section, but uses only two dashes in its "--" line. In
AsciiDoc this is an "open block", with no type; the lines end up jumbled
because they're formatted as paragraphs. We need four or more dashes to
make it a "listing block" that will respect the linebreaks.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-18 13:48:31 -08:00
Junio C Hamano
51ebf55b93 The sixth batch for 2.26
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-17 13:22:19 -08:00
Junio C Hamano
123538444f Merge branch 'jk/doc-credential-helper'
Docfix.

* jk/doc-credential-helper:
  doc: move credential helper info into gitcredentials(7)
2020-02-17 13:22:19 -08:00
Junio C Hamano
5d55554b1d Merge branch 'mr/show-config-scope'
"git config" learned to show in which "scope", in addition to in
which file, each config setting comes from.

* mr/show-config-scope:
  config: add '--show-scope' to print the scope of a config value
  submodule-config: add subomdule config scope
  config: teach git_config_source to remember its scope
  config: preserve scope in do_git_config_sequence
  config: clarify meaning of command line scoping
  config: split repo scope to local and worktree
  config: make scope_name non-static and rename it
  t1300: create custom config file without special characters
  t1300: fix over-indented HERE-DOCs
  config: fix typo in variable name
2020-02-17 13:22:17 -08:00
Junio C Hamano
e68e29171c Git 2.25.1
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Sync with 2.25.1
2020-02-16 20:41:40 -08:00
Junio C Hamano
c522f061d5 Git 2.25.1
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-16 20:37:38 -08:00
Elijah Newren
10cdb9f38a rebase: rename the two primary rebase backends
Two related changes, with separate rationale for each:

Rename the 'interactive' backend to 'merge' because:
  * 'interactive' as a name caused confusion; this backend has been used
    for many kinds of non-interactive rebases, and will probably be used
    in the future for more non-interactive rebases than interactive ones
    given that we are making it the default.
  * 'interactive' is not the underlying strategy; merging is.
  * the directory where state is stored is not called
    .git/rebase-interactive but .git/rebase-merge.

Rename the 'am' backend to 'apply' because:
  * Few users are familiar with git-am as a reference point.
  * Related to the above, the name 'am' makes sentences in the
    documentation harder for users to read and comprehend (they may read
    it as the verb from "I am"); avoiding this difficult places a large
    burden on anyone writing documentation about this backend to be very
    careful with quoting and sentence structure and often forces
    annoying redundancy to try to avoid such problems.
  * Users stumble over pronunciation ("am" as in "I am a person not a
    backend" or "am" as in "the first and thirteenth letters in the
    alphabet in order are "A-M"); this may drive confusion when one user
    tries to explain to another what they are doing.
  * While "am" is the tool driving this backend, the tool driving git-am
    is git-apply, and since we are driving towards lower-level tools
    for the naming of the merge backend we may as well do so here too.
  * The directory where state is stored has never been called
    .git/rebase-am, it was always called .git/rebase-apply.

For all the reasons listed above:
  * Modify the documentation to refer to the backends with the new names
  * Provide a brief note in the documentation connecting the new names
    to the old names in case users run across the old names anywhere
    (e.g. in old release notes or older versions of the documentation)
  * Change the (new) --am command line flag to --apply
  * Rename some enums, variables, and functions to reinforce the new
    backend names for us as well.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-16 15:40:42 -08:00
Elijah Newren
2ac0d6273f rebase: change the default backend from "am" to "merge"
The am-backend drops information and thus limits what we can do:

  * lack of full tree information from the original commits means we
    cannot do directory rename detection and warn users that they might
    want to move some of their new files that they placed in old
    directories to prevent their becoming orphaned.[1]
  * reduction in context from only having a few lines beyond those
    changed means that when context lines are non-unique we can apply
    patches incorrectly.[2]
  * lack of access to original commits means that conflict marker
    annotation has less information available.
  * the am backend has safety problems with an ill-timed interrupt.

Also, the merge/interactive backend have far more abilities, appear to
currently have a slight performance advantage[3] and have room for more
optimizations than the am backend[4] (and work is underway to take
advantage of some of those possibilities).

[1] https://lore.kernel.org/git/xmqqh8jeh1id.fsf@gitster-ct.c.googlers.com/
[2] https://lore.kernel.org/git/CABPp-BGiu2nVMQY_t-rnFR5GQUz_ipyEE8oDocKeO+h+t4Mn4A@mail.gmail.com/
[3] https://public-inbox.org/git/CABPp-BF=ev03WgODk6TMQmuNoatg2kiEe5DR__gJ0OTVqHSnfQ@mail.gmail.com/
[4] https://lore.kernel.org/git/CABPp-BGh7yW69QwxQb13K0HM38NKmQif3A6C6UULEKYnkEJ5vA@mail.gmail.com/

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-16 15:40:42 -08:00
Elijah Newren
8295ed690b rebase: make the backend configurable via config setting
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-16 15:40:42 -08:00
Elijah Newren
52eb738d6b rebase: add an --am option
Currently, this option doesn't do anything except error out if any
options requiring the interactive-backend are also passed.  However,
when we make the default backend configurable later in this series, this
flag will provide a way to override the config setting.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-16 15:40:42 -08:00
Elijah Newren
be50c938df git-rebase.txt: add more details about behavioral differences of backends
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-16 15:40:42 -08:00