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A function intended to be called from builtins updating refs
by locking them before write, specially those that came from
scripts using "git update-ref".
[jc: with minor fixups]
Signed-off-by: Carlos Rica <jasampler@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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git-checkout is also adapted to make use of this new option
instead of the handcrafted command sequence.
Signed-off-by: Sven Verdoolaege <skimo@kotnet.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
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This new function resolves a ref in *another* git repository. It's
named for its intended use: to look up the git link to a subproject.
It's not actually wired up to anything yet, but we're getting closer to
having fundamental plumbing support for "links" from one git directory
to another, which is the basis of subproject support.
[jc: amended a FILE* leak]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
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Currently, the search for all reflogs depends on the existence of
corresponding refs under the .git/refs/ directory. Let's scan the
.git/logs/ directory directly instead.
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
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A ref might be pointing to another ref but only the name of the last ref
is remembered. Let's remember about the first name as well.
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
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This allows for ref_log_write() to be used in a more flexible way,
and is needed for future changes.
This is only code reorg with no behavior change.
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
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You can pass an extra argument to the function to receive the
reflog message information. Also when the log does not go back
beyond the point the user asked, the cut-off time and count are
given back to the caller for emitting the error messages as
appropriately.
We could later add configuration for get_sha1_basic() to make it
an error instead of it being just a warning.
Signed-off-by: Junio C Hamano <junkio@cox.net>
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It used to ignore the return value of the helper function; now, it
expects it to return 0, and stops iteration upon non-zero return
values; this value is then passed on as the return value of
for_each_reflog_ent().
Further, it makes no sense to force the parsing upon the helper
functions; for_each_reflog_ent() now calls the helper function with
old and new sha1, the email, the timestamp & timezone, and the message.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>
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Signed-off-by: Junio C Hamano <junkio@cox.net>
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This changes the signature of rename_ref() in refs.[hc] to include a
logmessage for the reflogs.
Also, builtin-branch.c is modified to provide a proper logmessage + call
setup_ident() before any logmessages are written.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>
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Extend git-branch with the following options:
git-branch -m|-M [<oldbranch>] newbranch
The -M variation is required to force renaming over an exsisting
branchname.
This also indroduces $GIT_DIR/RENAME_REF which is a "metabranch"
used when renaming branches. It will always hold the original sha1
for the latest renamed branch.
Additionally, if $GIT_DIR/logs/RENAME_REF exists, all branch rename
events are logged there.
Finally, some testcases are added to verify the new options.
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>
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This fixes the previous implementation which failed to optimize
repositories with tons of lightweight tags. The updated
packed-refs format begins with "# packed-refs with:" line that
lists the kind of extended data the file records. Currently,
there is only one such extension defined, "peeled". This stores
the "peeled tag" on a line that immediately follows a line for a
tag object itself in the format "^<sha-1>".
The header line itself and any extended data are ignored by
older implementation, so packed-refs file generated with this
version can still be used by older git. packed-refs made by
older git can of course be used with this version.
Signed-off-by: Junio C Hamano <junkio@cox.net>
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This would speed up "show-ref -d" in a repository with mostly
packed tags.
Signed-off-by: Junio C Hamano <junkio@cox.net>
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Often I find myself wanting to say 'tip of "next" before I
merged the last three topics'. Now I can say that with:
git log next@{3}..next
Since small integers alone are invalid input strings to
approxidate, there is no fear of confusion.
Signed-off-by: Junio C Hamano <junkio@cox.net>
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This drops "mustexist" parameter lock_ref_sha1() and lock_any_ref_forupdate()
functions take.
Signed-off-by: Junio C Hamano <junkio@cox.net>
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This adds a "int *flag" parameter to resolve_ref() and makes
for_each_ref() family to call callback function with an extra
"int flag" parameter. They are used to give two bits of
information (REF_ISSYMREF and REF_ISPACKED) about the ref.
Signed-off-by: Junio C Hamano <junkio@cox.net>
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This is a long overdue fix to the API for for_each_ref() family
of functions. It allows the callers to specify a callback data
pointer, so that the caller does not have to use static
variables to communicate with the callback funciton.
The updated for_each_ref() family takes a function of type
int (*fn)(const char *, const unsigned char *, void *)
and a void pointer as parameters, and calls the function with
the name of the ref and its SHA-1 with the caller-supplied void
pointer as parameters.
The commit updates two callers, builtin-name-rev.c and
builtin-pack-refs.c as an example.
Signed-off-by: Junio C Hamano <junkio@cox.net>
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This actually "turns on" the packed ref file format, now that the
infrastructure to do so sanely exists (ie notably the change to make the
reference reading logic take refnames rather than pathnames to the loose
objects that no longer necessarily even exist).
In particular, when the ref lookup hits a refname that has no loose file
associated with it, it falls back on the packed-ref information. Also, the
ref-locking code, while still using a loose file for the locking itself
(and _creating_ a loose file for the new ref) no longer requires that the
old ref be in such an unpacked state.
Finally, this does a minimal hack to git-checkout.sh to rather than check
the ref-file directly, do a "git-rev-parse" on the "heads/$refname".
That's not really wonderful - we should rather really have a special
routine to verify the names as proper branch head names, but it is a
workable solution for now.
With this, I can literally do something like
git pack-refs
find .git/refs -type f -print0 | xargs -0 rm -f --
and the end result is a largely working repository (ie I've done two
commits - which creates _one_ unpacked ref file - done things like run
"gitk" and "git log" etc, and it all looks ok).
There are probably things missing, but I'm hoping that the missing things
are now of the "small and obvious" kind, and that somebody else might want
to start looking at this too. Hint hint ;)
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
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A few style fixes to get the code in line with the rest.
- asterisk to make a type a pointer to something goes in front
of the variable, not at the end of the base type.
E.g. a pointer to an integer is "int *ip", not "int* ip".
- open parenthesis for function parameter list, unlike
syntactic constructs, comes immediately after the function
name. E.g. "if (foo) bar();" not "if(foo) bar ();".
- "else" does not come on the same line as the closing brace of
corresponding "if".
The style is mostly a matter of personal taste, and people may
disagree, but consistency is important.
Signed-off-by: Junio C Hamano <junkio@cox.net>
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This updates the ref locking code to use creat-rename locking
code we use for the index file, so that it can borrow the code
to clean things up upon signals and program termination.
Signed-off-by: Junio C Hamano <junkio@cox.net>
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Normally we try to skip writing a ref if its value hasn't changed
but in the special case that the ref doesn't exist but the new
value is going to be 0{40} then force writing the ref anyway.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
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Extended sha1 expressions may now include date specifications
which indicate a point in time within the local repository's
history. If the ref indicated to the left of '@' has a log in
$GIT_DIR/logs/<ref> then the value of the ref at the time indicated
by the specification is obtained from the ref's log.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
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If config parameter core.logAllRefUpdates is true or the log
file already exists then append a line to ".git/logs/refs/<ref>"
whenever git-update-ref <ref> is executed. Each log line contains
the following information:
oldsha1 <SP> newsha1 <SP> committer <LF>
where committer is the current user, date, time and timezone in
the standard GIT ident format. If the caller is unable to append
to the log file then git-update-ref will fail without updating <ref>.
An optional message may be included in the log line with the -m flag.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
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Created 'struct ref_lock' to contain the data necessary to perform
a ref update. This change improves writing a ref as the file names
are generated only once (rather than twice) and supports following
symrefs (up to the maximum depth). Further the ref_lock structure
provides room to extend the update API with ref logging.
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
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"git branch" uses "rev-parse --all" and becomes much too slow when
there are many tags (it scans all refs). Use the new "--branches"
option of rev-parse to speed things up.
Signed-off-by: Sean Estabrooks <seanlkml@sympatico.ca>
Signed-off-by: Junio C Hamano <junkio@cox.net>
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"git_path()" returns a static pathname pointer into the git directory
using a printf-like format specifier.
"head_ref()" works like "for_each_ref()", except for just the HEAD.
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It needed to take the GIT_DIR information into account, something that
the original receive-pack usage just never cared about.
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This turns it into a generic "do xyz for each ref" library function.
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This patch adds code to read a hash out of a specified file under
{GIT_DIR}/refs/, and to write such files atomically and optionally with an
compare and lock.
Signed-off-by: Daniel Barkalow <barkalow@iabervon.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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