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Author SHA1 Message Date
Junio C Hamano a5eaa76b30 Merge branch 'ar/markup-em-dash'
Doc mark-up updates.

* ar/markup-em-dash:
  Documentation: render dash correctly
2023-01-30 14:24:24 -08:00
Andrei Rybak 70661d288b Documentation: render dash correctly
Three hyphens are rendered verbatim in documentation, so "--" has to be
used to produce a dash.  Fix asciidoc output for dashes.  This is
similar to previous commits f0b922473e (Documentation: render special
characters correctly, 2021-07-29) and de82095a95 (doc
hash-function-transition: fix asciidoc output, 2021-02-05).

Signed-off-by: Andrei Rybak <rybak.a.v@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-01-23 09:40:14 -08:00
Ævar Arnfjörð Bjarmason 4002ec3dcf read-tree: add "--super-prefix" option, eliminate global
The "--super-prefix" option to "git" was initially added in [1] for
use with "ls-files"[2], and shortly thereafter "submodule--helper"[3]
and "grep"[4]. It wasn't until [5] that "read-tree" made use of it.

At the time [5] made sense, but since then we've made "ls-files"
recurse in-process in [6], "grep" in [7], and finally
"submodule--helper" in the preceding commits.

Let's also remove it from "read-tree", which allows us to remove the
option to "git" itself.

We can do this because the only remaining user of it is the submodule
API, which will now invoke "read-tree" with its new "--super-prefix"
option. It will only do so when the "submodule_move_head()" function
is called.

That "submodule_move_head()" function was then only invoked by
"read-tree" itself, but now rather than setting an environment
variable to pass "--super-prefix" between cmd_read_tree() we:

- Set a new "super_prefix" in "struct unpack_trees_options". The
  "super_prefixed()" function in "unpack-trees.c" added in [5] will now
  use this, rather than get_super_prefix() looking up the environment
  variable we set earlier in the same process.

- Add the same field to the "struct checkout", which is only needed to
  ferry the "super_prefix" in the "struct unpack_trees_options" all the
  way down to the "entry.c" callers of "submodule_move_head()".

  Those calls which used the super prefix all originated in
  "cmd_read_tree()". The only other caller is the "unlink_entry()"
  caller in "builtin/checkout.c", which now passes a "NULL".

1. 74866d7579 (git: make super-prefix option, 2016-10-07)
2. e77aa336f1 (ls-files: optionally recurse into submodules, 2016-10-07)
3. 89c8626557 (submodule helper: support super prefix, 2016-12-08)
4. 0281e487fd (grep: optionally recurse into submodules, 2016-12-16)
5. 3d415425c7 (unpack-trees: support super-prefix option, 2017-01-17)
6. 188dce131f (ls-files: use repository object, 2017-06-22)
7. f9ee2fcdfa (grep: recurse in-process using 'struct repository', 2017-08-02)

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-12-26 10:21:44 +09:00
Junio C Hamano a1fdfb0975 Merge branch 'jc/environ-docs'
Documentation on various Boolean GIT_* environment variables have
been clarified.

* jc/environ-docs:
  environ: GIT_INDEX_VERSION affects not just a new repository
  environ: simplify description of GIT_INDEX_FILE
  environ: GIT_FLUSH should be made a usual Boolean
  environ: explain Boolean environment variables
  environ: document GIT_SSL_NO_VERIFY
2022-10-10 10:08:41 -07:00
Jacob Stopak 72991ff558 Documentation: clean up a few misspelled word typos
Used GNU "aspell check <filename>" to review various documentation
files with the default aspell dictionary. Ignored false-positives
between american and british english.

Signed-off-by: Jacob Stopak <jacob@initialcommit.io>
Reviewed-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-09-21 10:28:35 -07:00
Junio C Hamano 819fb68222 environ: GIT_INDEX_VERSION affects not just a new repository
The variable is consulted whenever we write the index file.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-09-16 09:45:22 -07:00
Junio C Hamano b724df6b55 environ: simplify description of GIT_INDEX_FILE
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-09-16 09:45:21 -07:00
Junio C Hamano fd01795beb environ: GIT_FLUSH should be made a usual Boolean
This uses atoi() and checks if the result is not zero to decide what
to do.  Turning it into the usual Boolean environment variable to
use git_env_bool() would not break those who have been using "set to
0, or set to non-zero, that can be parsed with atoi()" values, but
will match the expectation of those who expected "true" to mean
"yes".

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-09-15 11:34:51 -07:00
Junio C Hamano 80f0b3f397 environ: explain Boolean environment variables
Many environment variables use the git_env_bool() API to parse their
values, and allow the usual "true/yes/on are true, false/no/off are
false. In addition non-zero numbers are true and zero is false.  An
empty string is also false." set of values.

Mark them as such, and consistently say "true" or "false", instead
of random mixes of '1', '0', 'yes', 'true', etc. in their
description.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-09-15 11:34:51 -07:00
Junio C Hamano 29491ca5fd environ: document GIT_SSL_NO_VERIFY
Even though the name of the environment variable is mentioned in
"git config --help" from http.sslVerify, there is no description for
it.  Add one.

Note that this is not a usual Boolean environment variable whose
value can be yes/true/on vs no/false/off; the existence of it is
enough to trigger the feature named by the variable.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-09-15 11:34:51 -07:00
Junio C Hamano c0f6dd49f1 Merge branch 'ab/tech-docs-to-help'
Expose a lot of "tech docs" via "git help" interface.

* ab/tech-docs-to-help:
  docs: move http-protocol docs to man section 5
  docs: move cruft pack docs to gitformat-pack
  docs: move pack format docs to man section 5
  docs: move signature docs to man section 5
  docs: move index format docs to man section 5
  docs: move protocol-related docs to man section 5
  docs: move commit-graph format docs to man section 5
  git docs: add a category for file formats, protocols and interfaces
  git docs: add a category for user-facing file, repo and command UX
  git help doc: use "<doc>" instead of "<guide>"
  help.c: remove common category behavior from drop_prefix() behavior
  help.c: refactor drop_prefix() to use a "switch" statement"
2022-08-14 23:19:28 -07:00
Ævar Arnfjörð Bjarmason 844739ba27 git docs: add a category for file formats, protocols and interfaces
Create a new "File formats, protocols and other developer interfaces"
section in the main "git help git" manual page and start moving the
documentation that now lives in "Documentation/technical/*.git" over
to it. This complements the newly added and adjacent "Repository,
command and file interfaces" section.

This makes the technical documentation more accessible and
discoverable. Before this we wouldn't install it by default, and had
no ability to build man page versions of them. The links to them from
our existing documentation link to the generated HTML version of these
docs.

So let's start moving those over, starting with just the
"bundle-format.txt" documentation added in 7378ec90e1 (doc: describe
Git bundle format, 2020-02-07). We'll now have a new
gitformat-bundle(5) man page. Subsequent commits will move more git
internal format documentation over.

Unfortunately the syntax of the current Documentation/technical/*.txt
is not the same (when it comes to section headings etc.) as our
Documentation/*.txt documentation, so change the relevant bits of
syntax as we're moving this over.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-08-04 14:12:23 -07:00
Ævar Arnfjörð Bjarmason d976c5100f git docs: add a category for user-facing file, repo and command UX
Create a new "Repository, command and file interfaces" section in the
main "git help git" manual page. Move things that belong under this
new criteria from the generic "Guides" section.

The "Guides" section was added in f442f28a81 (git.txt: add list of
guides, 2020-08-05). It makes sense to have e.g. "giteveryday(7)" and
"gitfaq(7)" listed under "Guides".

But placing e.g. "gitignore(5)" in it is stretching the meaning of
what a "guide" is, ideally that section should list things similar to
"giteveryday(7)" and "gitcore-tutorial(7)".

An alternate name that was considered for this new section was "User
formats", for consistency with the nomenclature used for man section 5
in general. My man(1) lists it as "File formats and conventions,
e.g. /etc/passwd".

So calling this "git help --formats" or "git help --user-formats"
would make sense for e.g. gitignore(5), but would be stretching it
somewhat for githooks(5), and would seem really suspect for the likes
of gitcli(7).

Let's instead pick a name that's closer to the generic term "User
interface", which is really what this documentation discusses: General
user-interface documentation that doesn't obviously belong elsewhere.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-08-04 14:12:23 -07:00
Derrick Stolee 559c2c3d2a git.txt: remove redundant language
The documentation for GIT_ALLOW_PROTOCOL has a sentence that adds no
value, since it repeats the meaning from the previous sentence (twice!).

The word "whitelist" has cultural implications that are not inclusive,
which brought attention to this sentence.

Helped-by: Jeff King <peff@peff.net>
Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-07-19 12:45:31 -07:00
Garrit Franke 6b52f48b8f cli: add -v and -h shorthands
Change the behavior of "git -v" to be synonymous with "--version" /
"version", and "git -h" to be synonymous with "--help", but not "help".

These shorthands both display the "unknown option" message. Following
this change, "-v" displays the version, and "-h" displays the help text
of the "git" command.

It should be noted that the "-v" shorthand could be misinterpreted by
the user to mean "verbose" instead of "version", since some sub-commands
make use of it in this context. The top-level "git" command does not
have a "verbose" flag, so it's safe to introduce this shorthand
unambiguously.

Signed-off-by: Garrit Franke <garrit@slashdev.space>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-03-31 15:57:10 -07:00
Junio C Hamano b5e7f5e5b1 Merge branch 'if/redact-packfile-uri'
Redact the path part of packfile URI that appears in the trace output.

* if/redact-packfile-uri:
  http-fetch: redact url on die() message
  fetch-pack: redact packfile urls in traces
2021-12-10 14:35:04 -08:00
Ivan Frade 88e9b1e3fc fetch-pack: redact packfile urls in traces
In some setups, packfile uris act as bearer token. It is not
recommended to expose them plainly in logs, although in special
circunstances (e.g. debug) it makes sense to write them.

Redact the packfile URL paths by default, unless the GIT_TRACE_REDACT
variable is set to false. This mimics the redacting of the Authorization
header in HTTP.

Signed-off-by: Ivan Frade <ifrade@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-11-11 10:07:43 -08:00
Junio C Hamano 8b3bef88f7 Merge branch 'ma/doc-git-version'
Typofix.

* ma/doc-git-version:
  git.txt: fix typo
2021-10-29 15:43:14 -07:00
Martin Ågren 82a57cd13f git.txt: fix typo
Fix the spelling of "internally".

Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-10-25 10:19:30 -07:00
Jeff King 968f12fdac refs: turn on GIT_REF_PARANOIA by default
The original point of the GIT_REF_PARANOIA flag was to include broken
refs in iterations, so that possibly-destructive operations would not
silently ignore them (and would generally instead try to operate on the
oids and fail when the objects could not be accessed).

We already turned this on by default for some dangerous operations, like
"repack -ad" (where missing a reachability tip would mean dropping the
associated history). But it was not on for general use, even though it
could easily result in the spreading of corruption (e.g., imagine
cloning a repository which simply omits some of its refs because
their objects are missing; the result quietly succeeds even though you
did not clone everything!).

This patch turns on GIT_REF_PARANOIA by default. So a clone as mentioned
above would actually fail (upload-pack tells us about the broken ref,
and when we ask for the objects, pack-objects fails to deliver them).
This may be inconvenient when working with a corrupted repository, but:

  - we are better off to err on the side of complaining about
    corruption, and then provide mechanisms for explicitly loosening
    safety.

  - this is only one type of corruption anyway. If we are missing any
    other objects in the history that _aren't_ ref tips, then we'd
    behave similarly (happily show the ref, but then barf when we
    started traversing).

We retain the GIT_REF_PARANOIA variable, but simply default it to "1"
instead of "0". That gives the user an escape hatch for loosening this
when working with a corrupt repository. It won't work across a remote
connection to upload-pack (because we can't necessarily set environment
variables on the remote), but there the client has other options (e.g.,
choosing which refs to fetch).

As a bonus, this also makes ref iteration faster in general (because we
don't have to call has_object_file() for each ref), though probably not
noticeably so in the general case. In a repo with a million refs, it
shaved a few hundred milliseconds off of upload-pack's advertisement;
that's noticeable, but most repos are not nearly that large.

The possible downside here is that any operation which iterates refs but
doesn't ever open their objects may now quietly claim to have X when the
object is corrupted (e.g., "git rev-list new-branch --not --all" will
treat a broken ref as uninteresting). But again, that's not really any
different than corruption below the ref level. We might have
refs/heads/old-branch as non-corrupt, but we are not actively checking
that we have the entire reachable history. Or the pointed-to object
could even be corrupted on-disk (but our "do we have it" check would
still succeed). In that sense, this is merely bringing ref-corruption in
line with general object corruption.

One alternative implementation would be to actually check for broken
refs, and then _immediately die_ if we see any. That would cause the
"rev-list --not --all" case above to abort immediately. But in many ways
that's the worst of all worlds:

  - it still spends time looking up the objects an extra time

  - it still doesn't catch corruption below the ref level

  - it's even more inconvenient; with the current implementation of
    GIT_REF_PARANOIA for something like upload-pack, we can make
    the advertisement and let the client choose a non-broken piece of
    history. If we bail as soon as we see a broken ref, they cannot even
    see the advertisement.

The test changes here show some of the fallout. A non-destructive "git
repack -adk" now fails by default (but we can override it). Deleting a
broken ref now actually tells the hooks the correct "before" state,
rather than a confusing null oid.

Signed-off-by: Jeff King <peff@peff.net>
Reviewed-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-27 12:36:45 -07:00
Junio C Hamano 188da7dc09 Merge branch 'ma/doc-git-version'
Doc update.

* ma/doc-git-version:
  documentation: add documentation for 'git version'
2021-09-23 13:44:49 -07:00
Matthias Aßhauer b6d8887d3d documentation: add documentation for 'git version'
While 'git version' is probably the least complex git command,
it is a non-experimental user-facing builtin command. As such
it should have a help page.

Both `git help` and `git version` can be called as options
(`--help`/`--version`) that internally get converted to the
corresponding command. Add a small paragraph to
Documentation/git.txt describing how these two options
interact with each other and link to this help page for the
sub-options that `--version` can take. Well, currently there
is only one sub-option, but that could potentially increase
in future versions of Git.

Signed-off-by: Matthias Aßhauer <mha1993@live.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-14 10:05:40 -07:00
Jeff King 2834a72d5e docs/git: discuss server-side config for GIT_PROTOCOL
The v2 protocol requires that the GIT_PROTOCOL environment variable gets
passed around, but we don't have any documentation describing how this
is supposed to work. In particular, we need to note what server admins
might need to configure to make things work.

The definition of the GIT_PROTOCOL variable is probably the best place
for this, since:

  - we deal with multiple transports (ssh, http, etc).
    Transport-specific documentation (like the git-http-backend bits
    added in the previous commit) are helpful for those transports, but
    this gives a broader overview. Plus we do not have a specific
    transport endpoint program for ssh, so this is a reasonable place to
    mention it.

  - the server side of the protocol involves multiple programs. For now,
    upload-pack is the only endpoint which uses GIT_PROTOCOL, but that
    will likely expand in the future. We're better off with a central
    discussion of what the server admin might need to do. However, for
    discoverability, this patch adds a pointer from upload-pack's
    documentation.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-10 15:34:59 -07:00
Junio C Hamano e706aaf3bc Merge branch 'ps/config-global-override'
Replace GIT_CONFIG_NOSYSTEM mechanism to decline from reading the
system-wide configuration file with GIT_CONFIG_SYSTEM that lets
users specify from which file to read the system-wide configuration
(setting it to an empty file would essentially be the same as
setting NOSYSTEM), and introduce GIT_CONFIG_GLOBAL to override the
per-user configuration in $HOME/.gitconfig.

* ps/config-global-override:
  t1300: fix unset of GIT_CONFIG_NOSYSTEM leaking into subsequent tests
  config: allow overriding of global and system configuration
  config: unify code paths to get global config paths
  config: rename `git_etc_config()`
2021-05-07 12:47:39 +09:00
Junio C Hamano 5f586f55a0 Merge branch 'ps/config-env-option-with-separate-value'
"git --config-env var=val cmd" weren't accepted (only
--config-env=var=val was).

* ps/config-env-option-with-separate-value:
  git: support separate arg for `--config-env`'s value
  git.txt: fix synopsis of `--config-env` missing the equals sign
2021-05-07 12:47:37 +09:00
Patrick Steinhardt 9152904c11 git.txt: fix synopsis of --config-env missing the equals sign
When executing `git -h`, then the `--config-env` documentation rightly
lists the option as requiring an equals between the option and its
argument: this is the only currently supported format. But the git(1)
manpage incorrectly lists the option as taking a space in between.

Fix the issue by adding the missing space.

Reported-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-of-by: Patrick Steinhardt <ps@pks.im>
Reviewed-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-30 09:46:46 +09:00
Patrick Steinhardt 4179b4897f config: allow overriding of global and system configuration
In order to have git run in a fully controlled environment without any
misconfiguration, it may be desirable for users or scripts to override
global- and system-level configuration files. We already have a way of
doing this, which is to unset both HOME and XDG_CONFIG_HOME environment
variables and to set `GIT_CONFIG_NOGLOBAL=true`. This is quite kludgy,
and unsetting the first two variables likely has an impact on other
executables spawned by such a script.

The obvious way to fix this would be to introduce `GIT_CONFIG_NOGLOBAL`
as an equivalent to `GIT_CONFIG_NOSYSTEM`. But in the past, it has
turned out that this design is inflexible: we cannot test system-level
parsing of the git configuration in our test harness because there is no
way to change its location, so all tests run with `GIT_CONFIG_NOSYSTEM`
set.

Instead of doing the same mistake with `GIT_CONFIG_NOGLOBAL`, introduce
two new variables `GIT_CONFIG_GLOBAL` and `GIT_CONFIG_SYSTEM`:

    - If unset, git continues to use the usual locations.

    - If set to a specific path, we skip reading the normal
      configuration files and instead take the path. By setting the path
      to `/dev/null`, no configuration will be loaded for the respective
      level.

This implements the usecase where we want to execute code in a sanitized
environment without any potential misconfigurations via `/dev/null`, but
is more flexible and allows for more usecases than simply adding
`GIT_CONFIG_NOGLOBAL`.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-19 14:16:59 -07:00
Martin Ågren 83171ede22 git.txt: fix monospace rendering
When we write `<name>`s with the "s" tucked on to the closing backtick,
we end up rendering the backticks literally. Rephrase this sentence
slightly to render this as monospace.

Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-02-18 10:53:33 -08:00
Junio C Hamano 294e949fa2 Merge branch 'ps/config-env-pairs'
Introduce two new ways to feed configuration variable-value pairs
via environment variables, and tweak the way GIT_CONFIG_PARAMETERS
encodes variable/value pairs to make it more robust.

* ps/config-env-pairs:
  config: allow specifying config entries via envvar pairs
  environment: make `getenv_safe()` a public function
  config: store "git -c" variables using more robust format
  config: parse more robust format in GIT_CONFIG_PARAMETERS
  config: extract function to parse config pairs
  quote: make sq_dequote_step() a public function
  config: add new way to pass config via `--config-env`
  git: add `--super-prefix` to usage string
2021-01-25 14:19:19 -08:00
Patrick Steinhardt ce81b1da23 config: add new way to pass config via --config-env
While it's already possible to pass runtime configuration via `git -c
<key>=<value>`, it may be undesirable to use when the value contains
sensitive information. E.g. if one wants to set `http.extraHeader` to
contain an authentication token, doing so via `-c` would trivially leak
those credentials via e.g. ps(1), which typically also shows command
arguments.

To enable this usecase without leaking credentials, this commit
introduces a new switch `--config-env=<key>=<envvar>`. Instead of
directly passing a value for the given key, it instead allows the user
to specify the name of an environment variable. The value of that
variable will then be used as value of the key.

Co-authored-by: Jeff King <peff@peff.net>
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-01-12 12:03:18 -08:00
Philippe Blain 5bed7f66c4 git.txt: fix typos in 'linkgit' macro invocation
The 'linkgit' Asciidoc macro is misspelled as 'linkit' in the
description of 'GIT_SEQUENCE_EDITOR' since the addition of that variable
to git(1) in 902a126eca (doc: mention GIT_SEQUENCE_EDITOR and
'sequence.editor' more, 2020-08-31). Also, it uses two colons instead of
one.

Fix that.

Signed-off-by: Philippe Blain <levraiphilippeblain@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-12-22 12:02:29 -08:00
Han-Wen Nienhuys 4441f42707 refs: add GIT_TRACE_REFS debugging mechanism
When set in the environment, GIT_TRACE_REFS makes git print operations and
results as they flow through the ref storage backend. This helps debug
discrepancies between different ref backends.

Example:

    $ GIT_TRACE_REFS="1" ./git branch
    15:42:09.769631 refs/debug.c:26         ref_store for .git
    15:42:09.769681 refs/debug.c:249        read_raw_ref: HEAD: 0000000000000000000000000000000000000000 (=> refs/heads/ref-debug) type 1: 0
    15:42:09.769695 refs/debug.c:249        read_raw_ref: refs/heads/ref-debug: 3a238e539b (=> refs/heads/ref-debug) type 0: 0
    15:42:09.770282 refs/debug.c:233        ref_iterator_begin: refs/heads/ (0x1)
    15:42:09.770290 refs/debug.c:189        iterator_advance: refs/heads/b4 (0)
    15:42:09.770295 refs/debug.c:189        iterator_advance: refs/heads/branch3 (0)

Signed-off-by: Han-Wen Nienhuys <hanwen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-09 12:58:37 -07:00
Junio C Hamano cd332b2a31 Merge branch 'pb/doc-external-diff-env'
Doc update.

* pb/doc-external-diff-env:
  git.txt: correct stale 'GIT_EXTERNAL_DIFF' description
2020-09-03 12:37:09 -07:00
Philippe Blain 17bae89476 git.txt: correct stale 'GIT_EXTERNAL_DIFF' description
In fde97d8ac6 (Update documentation to remove incorrect GIT_DIFF_OPTS
example., 2006-11-27), the description of the 'GIT_EXTERNAL_DIFF'
variable was moved from 'diff-format.txt' to 'git.txt', and the
documentation was updated to remove a 'diff(1)' invocation since Git did
not use an external diff program anymore by default.

However, the description of 'GIT_EXTERNAL_DIFF' still mentions "instead
of the diff invocation described above", which is confusing.

Correct that outdated sentence.

Also, link to git(1) in 'diff-generate-patch.txt' when GIT_DIFF_OPTS and
GIT_EXTERNAL_DIFF are mentioned, so that users can easily know what
these variables are about.

Signed-off-by: Philippe Blain <levraiphilippeblain@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-09-01 12:17:05 -07:00
Philippe Blain 902a126eca doc: mention GIT_SEQUENCE_EDITOR and 'sequence.editor' more
The environment variable `GIT_SEQUENCE_EDITOR`, and the configuration
variable 'sequence.editor', which were added in 821881d88d ("rebase -i":
support special-purpose editor to edit insn sheet, 2011-10-17), are
mentioned in the `git config` man page but not anywhere else.

Include `config/sequencer.txt` in `git-rebase.txt`, so that both the
environment variable and the configuration setting are mentioned there.

Also, add `GIT_SEQUENCE_EDITOR` to the list of environment variables
in `git(1)`.

Signed-off-by: Philippe Blain <levraiphilippeblain@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-31 11:45:05 -07:00
Junio C Hamano d1ff7411f3 Merge branch 'ma/doc-sha-256-is-experimental'
The recent addition of SHA-256 support is marked as experimental in
the documentation.

* ma/doc-sha-256-is-experimental:
  Documentation: mark `--object-format=sha256` as experimental
2020-08-24 14:54:31 -07:00
Martin Ågren ff233d8dda Documentation: mark --object-format=sha256 as experimental
After eff45daab8 ("repository: enable SHA-256 support by default",
2020-07-29), vanilla builds of Git enable the user to run, e.g.,

  git init --object-format=sha256

and hack away. This can be a good way to gain experience with the
SHA-256 world, e.g., to find bugs that

  GIT_TEST_DEFAULT_HASH=sha256 make test

doesn't spot.

But it really is a separate world: Such SHA-256 repos will live entirely
separate from the (by now fairly large) set of SHA-1 repos. Interacting
across the border is possible in principle, e.g., through "diff + apply"
(or "format-patch + am"), but even that has its limitations: Applying a
SHA-256 diff in a SHA-1 repo works in the simple case, but if you need
to resort to `-3`, you're out of luck.

Similarly, "push + pull" should work, but you really will be operating
mostly offset from the rest of the world. That might be ok by the time
you initialize your repository, and it might be ok for several months
after that, but there might come a day when you're starting to regret
your use of `git init --object-format=sha256` and have dug yourself into
a fairly deep hole.

There are currently topics in flight to document our data formats and
protocols regarding SHA-256 and in some cases (midx and commit-graph),
we're considering adjusting how the file formats indicate which object
format to use.

Wherever `--object-format` is mentioned in our documentation, let's make
it clear that using it with "sha256" is experimental. If we later need
to explain why we can't handle data we generated back in 2020, we can
always point to this paragraph we're adding here.

By "include::"-ing a small blurb, we should be able to be consistent
throughout the documentation and can eventually gradually tone down the
severity of this text. One day, we might even use it to start phasing
out `--object-format=sha1`, but let's not get ahead of ourselves...

There's also `extensions.objectFormat`, but it's only mentioned three
times. Twice where we're adding this new disclaimer and in the third
spot we already have a "do not edit" warning. From there, interested
readers should eventually find this new one that we're adding here.

Because `GIT_DEFAULT_HASH` provides another entry point to this
functionality, document the experimental nature of it too.

Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-17 10:50:14 -07:00
Philippe Blain f442f28a81 git.txt: add list of guides
Not all man5/man7 guides are mentioned in the 'git(1)' documentation,
which makes the missing ones somewhat hard to find.

Add a list of the guides to git(1) by leveraging the existing
`Documentation/cmd-list.perl` script to generate a file `cmds-guide.txt`
which gets included in git.txt.

Also, do not hard-code the manual section '1'. Instead, use a regex so
that the manual section is discovered from the first line of each
`git*.txt` file.

This addition was hinted at in 1b81d8cb19 (help: use command-list.txt
for the source of guides, 2018-05-20).

Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Philippe Blain <levraiphilippeblain@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-08-04 18:34:02 -07:00
Junio C Hamano b8a5299594 Merge branch 'jt/redact-all-cookies'
The interface to redact sensitive information in the trace output
has been simplified.

* jt/redact-all-cookies:
  http: redact all cookies, teach GIT_TRACE_REDACT=0
2020-06-22 15:55:02 -07:00
Junio C Hamano 0b925a469e Merge branch 'jt/curl-verbose-on-trace-curl'
Rewrite support for GIT_CURL_VERBOSE in terms of GIT_TRACE_CURL.

Looking good.

* jt/curl-verbose-on-trace-curl:
  http, imap-send: stop using CURLOPT_VERBOSE
  t5551: test that GIT_TRACE_CURL redacts password
2020-06-08 18:06:32 -07:00
Jonathan Tan 827e7d4da4 http: redact all cookies, teach GIT_TRACE_REDACT=0
In trace output (when GIT_TRACE_CURL is true), redact the values of all
HTTP cookies by default. Now that auth headers (since the implementation
of GIT_TRACE_CURL in 74c682d3c6 ("http.c: implement the GIT_TRACE_CURL
environment variable", 2016-05-24)) and cookie values (since this
commit) are redacted by default in these traces, also allow the user to
inhibit these redactions through an environment variable.

Since values of all cookies are now redacted by default,
GIT_REDACT_COOKIES (which previously allowed users to select individual
cookies to redact) now has no effect.

Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-05 15:05:04 -07:00
Toon Claes ed11a5a7de Documentation: correct hash environment variable
To set the default hash algorithm you can set the `GIT_DEFAULT_HASH`
environment variable. In the documentation this variable is named
`GIT_DEFAULT_HASH_ALGORITHM`, which is incorrect.

Signed-off-by: Toon Claes <toon@iotcl.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-05-27 10:00:05 -07:00
Jonathan Tan 7167a62b9e http, imap-send: stop using CURLOPT_VERBOSE
Whenever GIT_CURL_VERBOSE is set, teach Git to behave as if
GIT_TRACE_CURL=1 and GIT_TRACE_CURL_NO_DATA=1 is set, instead of setting
CURLOPT_VERBOSE.

This is to prevent inadvertent revelation of sensitive data. In
particular, GIT_CURL_VERBOSE redacts neither the "Authorization" header
nor any cookies specified by GIT_REDACT_COOKIES.

Unifying the tracing mechanism also has the future benefit that any
improvements to the tracing mechanism will benefit both users of
GIT_CURL_VERBOSE and GIT_TRACE_CURL, and we do not need to remember to
implement any improvement twice.

Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-05-11 11:18:01 -07:00
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
Junio C Hamano 17e4a1b141 Merge branch 'hw/doc-git-dir'
One effect of specifying where the GIT_DIR is (either with the
environment variable, or with the "git --git-dir=<where> cmd"
option) is to disable the repository discovery.  This has been
placed a bit more stress in the documentation, as new users often
get confused.

* hw/doc-git-dir:
  git: update documentation for --git-dir
2020-02-12 12:41:36 -08:00
Heba Waly d82ad54945 git: update documentation for --git-dir
git --git-dir <path> is a bit confusing and sometimes doesn't work as
the user would expect it to.

For example, if the user runs `git --git-dir=<path> status`, git
will skip the repository discovery algorithm and will assign the
work tree to the user's current work directory unless otherwise
specified. When this assignment is wrong, the output will not match
the user's expectations.

This patch updates the documentation to make it clearer.

Signed-off-by: Heba Waly <heba.waly@gmail.com>
Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-01-30 10:25:00 -08:00
brian m. carlson bc94e5862a doc: move author and committer information to git-commit(1)
While at one time it made perfect sense to store information about
configuring author and committer information in the documentation for
git commit-tree, in modern Git that operation is seldom used.  Most
users will use git commit and expect to find comprehensive documentation
about its use in the manual page for that command.

Considering that there is significant confusion about how one is to use
the user.name and user.email variables, let's put as much documentation
as possible into an obvious place where users will be more likely to
find it.

In addition, expand the environment variables section to describe their
use more fully.  Even though we now describe all of the options there
and in the configuration settings documentation, preserve the existing
text in git-commit.txt so that people can easily reason about the
ordering of the various options they can use.  Explain the use of the
author.* and committer.* options as well.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-01-22 12:27:08 -08:00
Junio C Hamano 41dac79c2f Merge branch 'ds/commit-graph-delay-gen-progress'
One kind of progress messages were always given during commit-graph
generation, instead of following the "if it takes more than two
seconds, show progress" pattern, which has been corrected.

* ds/commit-graph-delay-gen-progress:
  commit-graph: use start_delayed_progress()
  progress: create GIT_PROGRESS_DELAY
2019-12-10 13:11:43 -08:00
Junio C Hamano 3b3d9ea6a8 Merge branch 'jk/lore-is-the-archive'
Doc update for the mailing list archiving and nntp service.

* jk/lore-is-the-archive:
  doc: replace public-inbox links with lore.kernel.org
  doc: recommend lore.kernel.org over public-inbox.org
2019-12-06 15:09:23 -08:00
Jeff King 46c67492aa doc: recommend lore.kernel.org over public-inbox.org
Since lore.kernel.org now has the same archive as public-inbox.org and
may have more longevity going forward[1], let's recommend people use it
for finding or referencing messages.

[1] https://public-inbox.org/git/20191120195556.GA25189@dcvr/
      or if you like:
    https://lore.kernel.org/git/20191120195556.GA25189@dcvr/

Signed-off-by: Jeff King <peff@peff.net>
Acked-by: Eric Wong <e@80x24.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-11-30 09:12:04 -08:00