Update the comment documenting 'struct option' to clarify that
PARSE_OPT_NODASH can only be an argumentless short option; see
51a9949eda (parseopt: add PARSE_OPT_NODASH, 2009-05-07).
Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The description of 'PARSE_OPT_KEEP_UNKNOWN' starts with "Keep unknown
arguments instead of erroring out". This is a bit misleading, as this
flag only applies to unknown --options, while non-option arguments are
kept even without this flag.
Update the description to clarify this, and rename the flag to
PARSE_OPTIONS_KEEP_UNKNOWN_OPT to make this obvious just by looking at
the flag name.
Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The description of the 'OPT_CMDMODE' macro states that "enum_val is
set to int_var when ...", but it's the other way around, 'int_var' is
set to 'enum_val'. Fix this.
Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
In 't0040-parse-options.sh' we thoroughly test the parsing of all
types and forms of options, but in all those tests parse_options() is
always invoked with a 0 flags parameter.
Add a few tests to demonstrate how various 'enum parse_opt_flags'
values are supposed to influence option parsing.
Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
'git remote' without a subcommand defaults to listing all remotes and
doesn't accept any arguments except the '-v|--verbose' option.
We are about to teach parse-options to handle subcommands, and update
'git remote' to make use of that new feature. So let's add some tests
to make sure that the upcoming changes don't inadvertently change the
behavior in these cases.
Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
'git notes' without a subcommand defaults to listing all notes and
doesn't accept any arguments.
We are about to teach parse-options to handle subcommands, and update
'git notes' to make use of that new feature. So let's add a test to
make sure that the upcoming changes don't inadvertenly change the
behavior in this corner case.
Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Our Bash completion script can complete --options for commands using
parse-options even when that command doesn't have a dedicated
completion function, but to do so the completion script must know
which commands use parse-options and which don't. Therefore, commands
not using parse-options are marked in 'git.c's command list with the
NO_PARSEOPT flag.
Update this list, and remove this flag from the commands that by now
use parse-options.
After this change we can TAB complete --options of the plumbing
commands 'commit-tree', 'mailinfo' and 'mktag'.
Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Earlier, HTTP transport clients learned to tell the server side
what locale they are in by sending Accept-Language HTTP header, but
this was done only for some requests but not others.
* ll/curl-accept-language:
remote-curl: send Accept-Language header to server
An earlier attempt to plug leaks placed a clean-up label to jump to
at a bogus place, which as been corrected.
* jk/diff-files-cleanup-fix:
diff-files: move misplaced cleanup label
A coccinelle rule (in contrib/) to encourage use of COPY_ARRAY
macro has been improved.
* rs/cocci-array-copy:
cocci: avoid normalization rules for memcpy
"git clone" from a repository with some ref whose HEAD is unborn
did not set the HEAD in the resulting repository correctly, which
has been corrected.
* jk/clone-unborn-confusion:
clone: move unborn head creation to update_head()
clone: use remote branch if it matches default HEAD
clone: propagate empty remote HEAD even with other branches
clone: drop extra newline from warning message
A corner case bug where lazily fetching objects from a promisor
remote resulted in infinite recursion has been corrected.
* hx/lookup-commit-in-graph-fix:
t5330: remove run_with_limited_processses()
commit-graph.c: no lazy fetch in lookup_commit_in_graph()
The resolve-undo information in the index was not protected against
GC, which has been corrected.
* jc/resolve-undo:
fsck: do not dereference NULL while checking resolve-undo data
revision: mark blobs needed for resolve-undo as reachable
The way "git multi-pack" uses parse-options API has been improved.
* sg/multi-pack-index-parse-options-fix:
multi-pack-index: simplify handling of unknown --options
The code to convert between GPG trust level strings and internal
constants we use to represent them have been cleaned up.
* jd/gpg-interface-trust-level-string:
gpg-interface: add function for converting trust level to string
Add Coccinelle rules to detect the pattern of initializing and then
finalizing a structure without using it in between at all, which
happens after code restructuring and the compilers fail to
recognize as an unused variable.
* ab/cocci-unused:
cocci: generalize "unused" rule to cover more than "strbuf"
cocci: add and apply a rule to find "unused" strbufs
cocci: have "coccicheck{,-pending}" depend on "coccicheck-test"
cocci: add a "coccicheck-test" target and test *.cocci rules
Makefile & .gitignore: ignore & clean "git.res", not "*.res"
Makefile: remove mandatory "spatch" arguments from SPATCH_FLAGS
Fixes a long-standing corner case bug around directory renames in
the merge-ort strategy.
* en/merge-dual-dir-renames-fix:
merge-ort: fix issue with dual rename and add/add conflict
merge-ort: shuffle the computation and cleanup of potential collisions
merge-ort: make a separate function for freeing struct collisions
merge-ort: small cleanups of check_for_directory_rename
t6423: add tests of dual directory rename plus add/add conflict
Tweak tests so that they still work when the "git init" template
did not create .git/info directory.
* ab/test-without-templates:
tests: don't assume a .git/info for .git/info/sparse-checkout
tests: don't assume a .git/info for .git/info/exclude
tests: don't assume a .git/info for .git/info/refs
tests: don't assume a .git/info for .git/info/attributes
tests: don't assume a .git/info for .git/info/grafts
tests: don't depend on template-created .git/branches
t0008: don't rely on default ".git/info/exclude"
Teach "make all" to build gitweb as well.
* ab/build-gitweb:
gitweb/Makefile: add a "NO_GITWEB" parameter
Makefile: build 'gitweb' in the default target
gitweb/Makefile: include in top-level Makefile
gitweb: remove "test" and "test-installed" targets
gitweb/Makefile: prepare to merge into top-level Makefile
gitweb/Makefile: clear up and de-duplicate the gitweb.{css,js} vars
gitweb/Makefile: add a $(GITWEB_ALL) variable
gitweb/Makefile: define all .PHONY prerequisites inline
Apply Coccinelle rule to turn raw memmove() into MOVE_ARRAY() cpp
macro, which would improve maintainability and readability.
* jc/builtin-mv-move-array:
builtin/mv.c: use the MOVE_ARRAY() macro instead of memmove()
Recent update to vimdiff layout code has been made more robust
against different end-user vim settings.
* fr/vimdiff-layout-fix:
vimdiff: make layout engine more robust against user vim settings
The implementation of mkstemp() for MinGW uses mktemp() and open()
without the flag O_EXCL, which is racy. It's not a security problem
for now because all of its callers only create files within the
repository (incl. worktrees). Replace it with a call to our more
secure internal function, git_mkstemp_mode(), to prevent possible
future issues.
Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
There is a known social engineering attack that takes advantage of the
fact that a working tree can include an entire bare repository,
including a config file. A user could run a Git command inside the bare
repository thinking that the config file of the 'outer' repository would
be used, but in reality, the bare repository's config file (which is
attacker-controlled) is used, which may result in arbitrary code
execution. See [1] for a fuller description and deeper discussion.
A simple mitigation is to forbid bare repositories unless specified via
`--git-dir` or `GIT_DIR`. In environments that don't use bare
repositories, this would be minimally disruptive.
Create a config variable, `safe.bareRepository`, that tells Git whether
or not to die() when working with a bare repository. This config is an
enum of:
- "all": allow all bare repositories (this is the default)
- "explicit": only allow bare repositories specified via --git-dir
or GIT_DIR.
If we want to protect users from such attacks by default, neither value
will suffice - "all" provides no protection, but "explicit" is
impractical for bare repository users. A more usable default would be to
allow only non-embedded bare repositories ([2] contains one such
proposal), but detecting if a repository is embedded is potentially
non-trivial, so this work is not implemented in this series.
[1]: https://lore.kernel.org/git/kl6lsfqpygsj.fsf@chooglen-macbookpro.roam.corp.google.com
[2]: https://lore.kernel.org/git/5b969c5e-e802-c447-ad25-6acc0b784582@github.com
Signed-off-by: Glen Choo <chooglen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Use git_protected_config() to read `safe.directory` instead of
read_very_early_config(), making it 'protected configuration only'.
As a result, `safe.directory` now respects "-c", so update the tests and
docs accordingly. It used to ignore "-c" due to how it was implemented,
not because of security or correctness concerns [1].
[1] https://lore.kernel.org/git/xmqqlevabcsu.fsf@gitster.g/
Signed-off-by: Glen Choo <chooglen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
`uploadpack.packObjectsHook` is the only 'protected configuration only'
variable today, but we've noted that `safe.directory` and the upcoming
`safe.bareRepository` should also be 'protected configuration only'. So,
for consistency, we'd like to have a single implementation for protected
configuration.
The primary constraints are:
1. Reading from protected configuration should be fast. Nearly all "git"
commands inside a bare repository will read both `safe.directory` and
`safe.bareRepository`, so we cannot afford to be slow.
2. Protected configuration must be readable when the gitdir is not
known. `safe.directory` and `safe.bareRepository` both affect
repository discovery and the gitdir is not known at that point [1].
The chosen implementation in this commit is to read protected
configuration and cache the values in a global configset. This is
similar to the caching behavior we get with the_repository->config.
Introduce git_protected_config(), which reads protected configuration
and caches them in the global configset protected_config. Then, refactor
`uploadpack.packObjectsHook` to use git_protected_config().
The protected configuration functions are named similarly to their
non-protected counterparts, e.g. git_protected_config_check_init() vs
git_config_check_init().
In light of constraint 1, this implementation can still be improved.
git_protected_config() iterates through every variable in
protected_config, which is wasteful, but it makes the conversion simple
because it matches existing patterns. We will likely implement constant
time lookup functions for protected configuration in a future series
(such functions already exist for non-protected configuration, i.e.
repo_config_get_*()).
An alternative that avoids introducing another configset is to continue
to read all config using git_config(), but only accept values that have
the correct config scope [2]. This technically fulfills constraint 2,
because git_config() simply ignores the local and worktree config when
the gitdir is not known. However, this would read incomplete config into
the_repository->config, which would need to be reset when the gitdir is
known and git_config() needs to read the local and worktree config.
Resetting the_repository->config might be reasonable while we only have
these 'protected configuration only' variables, but it's not clear
whether this extends well to future variables.
[1] In this case, we do have a candidate gitdir though, so with a little
refactoring, it might be possible to provide a gitdir.
[2] This is how `uploadpack.packObjectsHook` was implemented prior to
this commit.
Signed-off-by: Glen Choo <chooglen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
For security reasons, there are config variables that are only trusted
when they are specified in certain configuration scopes, which are
sometimes referred to on-list as 'protected configuration' [1]. A future
commit will introduce another such variable, so let's define our terms
so that we can have consistent documentation and implementation.
In our documentation, define 'protected configuration' as the system,
global and command config scopes. As a shorthand, I will refer to
variables that are only respected in protected configuration as
'protected configuration only', but this term is not used in the
documentation.
This definition of protected configuration is based on whether or not
Git can reasonably protect the user by ignoring the configuration scope:
- System, global and command line config are considered protected
because an attacker who has control over any of those can do plenty of
harm without Git, so we gain very little by ignoring those scopes.
- On the other hand, local (and similarly, worktree) config are not
considered protected because it is relatively easy for an attacker to
control local config, e.g.:
- On some shared user environments, a non-admin attacker can create a
repository high up the directory hierarchy (e.g. C:\.git on
Windows), and a user may accidentally use it when their PS1
automatically invokes "git" commands.
`safe.directory` prevents attacks of this form by making sure that
the user intended to use the shared repository. It obviously
shouldn't be read from the repository, because that would end up
trusting the repository that Git was supposed to reject.
- "git upload-pack" is expected to run in repositories that may not be
controlled by the user. We cannot ignore all config in that
repository (because "git upload-pack" would fail), but we can limit
the risks by ignoring `uploadpack.packObjectsHook`.
Only `uploadpack.packObjectsHook` is 'protected configuration only'. The
following variables are intentionally excluded:
- `safe.directory` should be 'protected configuration only', but it does
not technically fit the definition because it is not respected in the
"command" scope. A future commit will fix this.
- `trace2.*` happens to read the same scopes as `safe.directory` because
they share an implementation. However, this is not for security
reasons; it is because we want to start tracing so early that
repository-level config and "-c" are not available [2].
This requirement is unique to `trace2.*`, so it does not makes sense
for protected configuration to be subject to the same constraints.
[1] For example,
https://lore.kernel.org/git/6af83767-576b-75c4-c778-0284344a8fe7@github.com/
[2] https://lore.kernel.org/git/a0c89d0d-669e-bf56-25d2-cbb09b012e70@jeffhostetler.com/
Signed-off-by: Glen Choo <chooglen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
In a subsequent commit, we will introduce "protected configuration",
which is easiest to describe in terms of configuration scopes (i.e. it's
the union of the 'system', 'global', and 'command' scopes). This
description is fine for ML discussions, but it's inadequate for end
users because we don't provide a good description of "configuration
scopes" in the public docs.
145d59f482 (config: add '--show-scope' to print the scope of a config
value, 2020-02-10) introduced the word "scope" to our public docs, but
that only enumerates the scopes and assumes the user can figure out
what those values mean.
Add a SCOPES section to Documentation/git-config.txt that describes the
configuration scopes, their corresponding CLI options, and mentions that
some configuration options are only respected in certain scopes. Then,
use the word "scope" to simplify the FILES section and change some
confusing wording.
Signed-off-by: Glen Choo <chooglen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Further preparation to turn git-submodule.sh into a builtin.
* ab/submodule-cleanup:
git-sh-setup.sh: remove "say" function, change last users
git-submodule.sh: use "$quiet", not "$GIT_QUIET"
submodule--helper: eliminate internal "--update" option
submodule--helper: understand --checkout, --merge and --rebase synonyms
submodule--helper: report "submodule" as our name in some "-h" output
submodule--helper: rename "absorb-git-dirs" to "absorbgitdirs"
submodule update: remove "-v" option
submodule--helper: have --require-init imply --init
git-submodule.sh: remove unused top-level "--branch" argument
git-submodule.sh: make the "$cached" variable a boolean
git-submodule.sh: remove unused $prefix variable
git-submodule.sh: remove unused sanitize_submodule_env()
"git mv A B" in a sparsely populated working tree can be asked to
move a path between directories that are "in cone" (i.e. expected
to be materialized in the working tree) and "out of cone"
(i.e. expected to be hidden). The handling of such cases has been
improved.
* sy/mv-out-of-cone:
mv: add check_dir_in_index() and solve general dir check issue
mv: use flags mode for update_mode
mv: check if <destination> exists in index to handle overwriting
mv: check if out-of-cone file exists in index with SKIP_WORKTREE bit
mv: decouple if/else-if checks using goto
mv: update sparsity after moving from out-of-cone to in-cone
t1092: mv directory from out-of-cone to in-cone
t7002: add tests for moving out-of-cone file/directory
Allow large objects read from a packstream to be streamed into a
loose object file straight, without having to keep it in-core as a
whole.
* hx/unpack-streaming:
unpack-objects: use stream_loose_object() to unpack large objects
core doc: modernize core.bigFileThreshold documentation
object-file.c: add "stream_loose_object()" to handle large object
object-file.c: factor out deflate part of write_loose_object()
object-file.c: refactor write_loose_object() to several steps
unpack-objects: low memory footprint for get_data() in dry_run mode
"git merge-tree" learned a new mode where it takes two commits and
computes a tree that would result in the merge commit, if the
histories leading to these two commits were to be merged.
* en/merge-tree:
git-merge-tree.txt: add a section on potentional usage mistakes
merge-tree: add a --allow-unrelated-histories flag
merge-tree: allow `ls-files -u` style info to be NUL terminated
merge-ort: optionally produce machine-readable output
merge-ort: store more specific conflict information
merge-ort: make `path_messages` a strmap to a string_list
merge-ort: store messages in a list, not in a single strbuf
merge-tree: provide easy access to `ls-files -u` style info
merge-tree: provide a list of which files have conflicts
merge-ort: remove command-line-centric submodule message from merge-ort
merge-ort: provide a merge_get_conflicted_files() helper function
merge-tree: support including merge messages in output
merge-ort: split out a separate display_update_messages() function
merge-tree: implement real merges
merge-tree: add option parsing and initial shell for real merge function
merge-tree: move logic for existing merge into new function
merge-tree: rename merge_trees() to trivial_merge_trees()
In a non-bare repository, the behavior of Git when the
core.worktree configuration variable points at a directory that has
a repository as its subdirectory, regressed in Git 2.27 days.
* gg/worktree-from-the-above:
dir: minor refactoring / clean-up
dir: traverse into repository
When sorting the output of `git shortlog` by count, a list of authors in
alphabetical order is then sorted by contribution count. Obviously, the
idea is to maintain the alphabetical order for items with identical
contribution count.
At the moment, this job is performed by `qsort()`. As that function is
not guaranteed to implement a stable sort algorithm, this can lead to
inconsistent and/or surprising behavior: items with identical
contribution count could lose their alphabetical sub-order.
The `qsort()` in MS Visual C's runtime does _not_ implement a stable
sort algorithm, and under certain circumstances this even causes a test
failure in t4201.21 "shortlog can match multiple groups", where two
authors both are listed with 2 contributions, and are listed in inverse
alphabetical order.
Let's instead use the stable sort provided by `git_stable_qsort()` to
avoid this inconsistency.
This is a companion to 2049b8dc65 (diffcore_rename(): use a stable sort,
2019-09-30).
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
In 0041797449 (vimdiff: new implementation with layout support,
2022-03-30), we introduced a completely new implementation of the
`vimdiff` backend for `git mergetool`.
In this implementation, we no longer call `vim` directly but we
accumulate in the variable `FINAL_CMD` an arbitrary number of commands
for `vim` to execute, which necessitates the use of `eval` to split the
commands properly into multiple command-line arguments.
That same `eval` command also needs to pass the paths to `vim`, and
while it looks as if they are quoted correctly, that quoting only
reaches the `eval` instruction and is lost after that, therefore paths
that contain whitespace characters (or other characters that are
interpreted by the POSIX shell) are handled incorrectly.
This is a simple reproducer:
git init -b main bam-merge-fail
cd bam-merge-fail
echo a>"a file.txt"
git add "a file.txt"
git commit -m "added 'a file.txt'"
echo b>"a file.txt"
git add "a file.txt"
git commit -m "diverged b 'a file.txt'"
git checkout -b c HEAD~
echo c>"a file.txt"
git add "a file.txt"
git commit -m "diverged c 'a file.txt'"
git checkout main
git merge c
git mergetool --tool=vimdiff
With Git v2.37.0/v2.37.1, this will open 7 buffers, not four, and not
display the correct contents at all.
To fix this, let's not expand the variables containing the path
parameters before passing them to the `eval` command, but let that
command expand the variables instead.
This fixes https://github.com/git-for-windows/git/issues/3945
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
In 78d5e4cfb4 (tests: refactor --write-junit-xml code, 2022-05-21),
this developer refactored the `--write-junit-xml` code a bit, including
the part where the current test case's title was used in a `set`
invocation, but failed to account for the fact that some test cases'
titles start with a long option, which the `set` misinterprets as being
intended for parsing.
Let's fix this by using the `set -- <...>` form.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
SZEDER Gábor
Junio C Hamano
René Scharfe
Glen Choo
Johannes Schindelin