The find_last_dir_sep() function is implemented as an inline function
which takes in a "const char *" and returns a "char *" via strrchr().
That means that just like strrchr(), it quietly removes the const from
our pointer, which could lead to accidentally writing to the resulting
string.
But C23 versions of libc (including recent glibc) annotate strrchr()
such that the compiler can detect when const is implicitly lost, and it
now complains about the call in this inline function.
We can't just switch the return type of the function to "const char *",
though. Some callers really do want a non-const string to be returned
(and are OK because they are feeding a non-const string into the
function).
The most general solution is for us to annotate find_last_dir_sep() in
the same way that is done for strrchr(). But doing so relies on using
C23 generics, which we do not otherwise require.
Since this inline function is wrapping a single call to strrchr(), we
can take a shortcut. If we implement it as a macro, then the original
type information is still available to strrchr(), and it does the check
for us.
Note that this is just one implementation of find_last_dir_sep(). There
is an alternate implementation in compat/win32/path-utils.h. It doesn't
suffer from the same warning, as it does not use strrchr() and just
casts away const explicitly. That's not ideal, and eventually we may
want to conditionally teach it the same C23 generic trick that strrchr()
uses. But it has been that way forever, and our goal here is just
quieting new warnings, not improving const-checking.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
We do this:
char *equals = strchr(*e, '=');
which implicitly removes the constness from "*e" and cause the compiler
to complain. We never write to "equals", but later assign it to a
string_list util field, which is defined as non-const "void *".
We have to cast somewhere, but doing so at the assignment to util is the
least-bad place, since that is the source of the confusion. Sadly we are
still open to accidentally writing to the string via the util pointer,
but that is the cost of using void pointers, which lose all type
information.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When we do:
char *cp = strchr(argv[i], '=');
it implicitly removes the constness from argv[i]. We need "cp" to remain
writable (since we overwrite it with a NUL). In theory we should be able
to drop the const from argv[i], because it is a sub-pointer into our
duplicated pager_env variable.
But we get it from split_cmdline(), which uses the traditional "const
char **" type for argv. This is overly limiting, but changing it would
be awkward for all the other callers of split_cmdline().
Let's do an explicit cast with a note about why it is OK. This is enough
to silence compiler warnings about the implicit const problems.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
We implicitly drop the const from our "key" variable when we do:
char *p = strchr(key, ' ');
which causes compilation with some C23 versions of libc (notably recent
glibc) to complain.
We need "p" to remain writable, since we assign NUL over the space we
found. We can solve this by also making "key" writable. This works
because it comes from a strbuf, which is itself a writable string.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The "path" field of a "struct repo" (a custom http-push struct, not to
be confused with "struct repository) is a pointer into a const argv
string, and is never written to.
The compiler does not traditionally complain about assigning from a
const pointer because it happens via strchr(). But with some C23 libc
versions (notably recent glibc), it has started to do so. Let's mark the
field as const to silence the warnings.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
C23 versions of libc (like recent glibc) may provide generic versions of
strchr() that match constness between the input and return value. The
idea being that the compiler can detect when it implicitly converts a
const pointer into a non-const one (which then emits a warning).
There are a few cases here where the result pointer does not need to be
non-const at all, and we should mark it as such. That silences the
warning (and avoids any potential problems with trying to write via
those pointers).
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The unsigned integer that is used as an bitset to specify the kind
of branches interpret_branch_name() function has been changed to
use a dedicated enum type.
* jw/object-name-bitset-to-enum:
object-name: turn INTERPRET_BRANCH_* constants into enum values
"git apply" now reports the name of the input file along with the
line number when it encounters a corrupt patch, and correctly
resets the line counter when processing multiple patch files.
* jw/apply-corrupt-location:
apply: report input location in binary and garbage patch errors
apply: report input location in header parsing errors
apply: report the location of corrupt patches
split-index.c has been updated to not use the global the_repository
and the_hash_algo variables.
* rs/split-index-the-repo-fix:
split-index: stop using the_repository and the_hash_algo
The cleanup of remaining bitmaps in "ahead_behind()" has been
simplified.
* rs/ahead-behind-cleanup-optimization:
commit-reach: simplify cleanup of remaining bitmaps in ahead_behind ()
Code clean-up overdue by 19 years.
* jc/rerere-modern-strbuf-handling:
cocci: strbuf.buf is never NULL
rerere: update to modern representation of empty strbufs
Doc updates.
* kh/doc-interpret-trailers-1:
interpret-trailers: use placeholder instead of *
doc: config: convert trailers section to synopsis style
doc: interpret-trailers: normalize and fill out options
doc: interpret-trailers: convert to synopsis style
The reference-transaction hook was taught to be triggered before
taking locks on references in the "preparing" phase.
* ej/ref-transaction-hook-preparing:
refs: add 'preparing' phase to the reference-transaction hook
merge-file --object-id used to trigger a BUG when run in a linked
worktree, which has been fixed.
* mr/merge-file-object-id-worktree-fix:
merge-file: fix BUG when --object-id is used in a worktree
Uses of prio_queue as a LIFO stack of commits have been written
with commit_stack.
* rs/prio-queue-to-commit-stack:
use commit_stack instead of prio_queue in LIFO mode
The handling of the incomplete lines at the end by "git
diff-highlight" has been fixed.
* jk/diff-highlight-identical-pairs:
contrib/diff-highlight: do not highlight identical pairs
The logic to count objects has been cleaned up.
* ps/object-counting:
odb: introduce generic object counting
odb/source: introduce generic object counting
object-file: generalize counting objects
object-file: extract logic to approximate object count
packfile: extract logic to count number of objects
odb: stop including "odb/source.h"
Further work on incremental repacking using MIDX/bitmap
* tb/incremental-midx-part-3.2:
midx: enable reachability bitmaps during MIDX compaction
midx: implement MIDX compaction
t/helper/test-read-midx.c: plug memory leak when selecting layer
midx-write.c: factor fanout layering from `compute_sorted_entries()`
midx-write.c: enumerate `pack_int_id` values directly
midx-write.c: extract `fill_pack_from_midx()`
midx-write.c: introduce `midx_pack_perm()` helper
midx: do not require packs to be sorted in lexicographic order
midx-write.c: introduce `struct write_midx_opts`
midx-write.c: don't use `pack_perm` when assigning `bitmap_pos`
t/t5319-multi-pack-index.sh: fix copy-and-paste error in t5319.39
git-multi-pack-index(1): align SYNOPSIS with 'git multi-pack-index -h'
git-multi-pack-index(1): remove non-existent incompatibility
builtin/multi-pack-index.c: make '--progress' a common option
midx: introduce `midx_get_checksum_hex()`
midx: rename `get_midx_checksum()` to `midx_get_checksum_hash()`
midx: mark `get_midx_checksum()` arguments as const
Add a coccinelle rule to break the build when "struct strbuf" gets
passed by value.
* dd/cocci-do-not-pass-strbuf-by-value:
stash: do not pass strbuf by value
coccinelle: detect struct strbuf passed by value
"git diff -U<num>" was too lenient in its command line parsing and
took an empty string as a valid <num>.
* ty/doc-diff-u-wo-number:
diff: document -U without <n> as using default context
Reduce system overhead "git upload-pack" spends on relaying "git
pack-objects" output to the "git fetch" running on the other end of
the connection.
* ps/upload-pack-buffer-more-writes:
builtin/pack-objects: reduce lock contention when writing packfile data
csum-file: drop `hashfd_throughput()`
csum-file: introduce `hashfd_ext()`
sideband: use writev(3p) to send pktlines
wrapper: introduce writev(3p) wrappers
compat/posix: introduce writev(3p) wrapper
upload-pack: reduce lock contention when writing packfile data
upload-pack: prefer flushing data over sending keepalive
upload-pack: adapt keepalives based on buffering
upload-pack: fix debug statement when flushing packfile data
The final clean-up phase of the diff output could turn the result of
histogram diff algorithm suboptimal, which has been corrected.
* yc/histogram-hunk-shift-fix:
xdiff: re-diff shifted change groups when using histogram algorithm
"git history" learned the "split" subcommand.
* ps/history-split:
builtin/history: implement "split" subcommand
builtin/history: split out extended function to create commits
cache-tree: allow writing in-memory index as tree
add-patch: allow disabling editing of hunks
add-patch: add support for in-memory index patching
add-patch: remove dependency on "add-interactive" subsystem
add-patch: split out `struct interactive_options`
add-patch: split out header from "add-interactive.h"
"git fast-import" learned to optionally replace signature on
commits whose signatures get invalidated due to replaying by
signing afresh.
* jt/fast-import-sign-again:
fast-import: add mode to sign commits with invalid signatures
gpg-interface: allow sign_buffer() to use default signing key
commit: remove unused forward declaration
"imap-send" used to use functions whose use is going to be removed
with OpenSSL 4.0; rewrite them using public API that has been
available since OpenSSL 1.1 since 2016 or so.
* bb/imap-send-openssl-4.0-prep:
imap-send: move common code into function host_matches()
imap-send: use the OpenSSL API to access the subject common name
imap-send: use the OpenSSL API to access the subject alternative names
The code in "git help" that shows configuration items in sorted
order was awkwardly organized and prone to bugs.
* ac/help-sort-correctly:
help: cleanup the contruction of keys_uniq
Instead of hardcoded 'origin', use the configured default remote
when fetching from submodules.
* ng/submodule-default-remote:
submodule: fetch missing objects from default remote
Small code clean-up around the constness area.
* cf/constness-fixes:
dir: avoid -Wdiscarded-qualifiers in remove_path()
bloom: remove a misleading const qualifier
* 'master' of https://github.com/j6t/git-gui:
git-gui: grey out comment lines in commit message
git-gui: wire up "git-gui--askyesno" with Meson
git-gui: massage "git-gui--askyesno" with "generate-script.sh"
git-gui: prefer shell at "/bin/sh" with Meson
git-gui: fix use of GIT_CEILING_DIRECTORIES
git-gui: shift tabstops to account for the first column of patch text
* 'master' of https://github.com/j6t/gitk:
gitk: l10n: make PO headers identify the Gitk project
gitk: ignore generated POT file
gitk: i18n: use "Gitk" as package name in POT file
gitk: commit translation files without file information
gitk: support link color in the Preferences dialog
gitk: use config settings for head/tag colors
