This introduces --no-reuse-delta option to disable reusing of
existing delta, which is a large part of the optimization
introduced by this series. This may become necessary if
repeated repacking makes delta chain too long. With this, the
output of the command becomes identical to that of the older
implementation. But the performance suffers greatly.
It still allows reusing non-deltified representations; there is
no point uncompressing and recompressing the whole text.
It also adds a couple more statistics output, while squelching
it under -q flag, which the last round forgot to do.
$ time old-git-pack-objects --stdout >/dev/null <RL
Generating pack...
Done counting 184141 objects.
Packing 184141 objects....................
real 12m8.530s user 11m1.450s sys 0m57.920s
$ time git-pack-objects --stdout >/dev/null <RL
Generating pack...
Done counting 184141 objects.
Packing 184141 objects.....................
Total 184141, written 184141 (delta 138297), reused 178833 (delta 134081)
real 0m59.549s user 0m56.670s sys 0m2.400s
$ time git-pack-objects --stdout --no-reuse-delta >/dev/null <RL
Generating pack...
Done counting 184141 objects.
Packing 184141 objects.....................
Total 184141, written 184141 (delta 134833), reused 47904 (delta 0)
real 11m13.830s user 9m45.240s sys 0m44.330s
There is one remaining issue when --no-reuse-delta option is not
used. It can create delta chains that are deeper than specified.
A<--B<--C<--D E F G
Suppose we have a delta chain A to D (A is stored in full either
in a pack or as a loose object. B is depth1 delta relative to A,
C is depth2 delta relative to B...) with loose objects E, F, G.
And we are going to pack all of them.
B, C and D are left as delta against A, B and C respectively.
So A, E, F, and G are examined for deltification, and let's say
we decided to keep E expanded, and store the rest as deltas like
this:
E<--F<--G<--A
Oops. We ended up making D a bit too deep, didn't we? B, C and
D form a chain on top of A!
This is because we did not know what the final depth of A would
be, when we checked objects and decided to keep the existing
delta. Unfortunately, deferring the decision until just before
the deltification is not an option. To be able to make B, C,
and D candidates for deltification with the rest, we need to
know the type and final unexpanded size of them, but the major
part of the optimization comes from the fact that we do not read
the delta data to do so -- getting the final size is quite an
expensive operation.
To prevent this from happening, we should keep A from being
deltified. But how would we tell that, cheaply?
To do this most precisely, after check_object() runs, each
object that is used as the base object of some existing delta
needs to be marked with the maximum depth of the objects we
decided to keep deltified (in this case, D is depth 3 relative
to A, so if no other delta chain that is longer than 3 based on
A exists, mark A with 3). Then when attempting to deltify A, we
would take that number into account to see if the final delta
chain that leads to D becomes too deep.
However, this is a bit cumbersome to compute, so we would cheat
and reduce the maximum depth for A arbitrarily to depth/4 in
this implementation.
Signed-off-by: Junio C Hamano <junkio@cox.net>
git-cvsserver is highly functional. However, not all methods are implemented,
and for those methods that are implemented, not all switches are implemented.
All the common read operations are implemented, and add/remove/commit are
supported.
Testing has been done using both the CLI CVS client, and the Eclipse CVS
plugin. Most functionality works fine with both of these clients.
Currently git-cvsserver only works over SSH connections, see the
Documentation for more details on how to configure your client. It
does not support pserver for anonymous access but it should not be
hard to implement. Anonymous access will need tighter input validation.
In our very informal tests, it seems to be significantly faster than a real
CVS server.
This utility depends on a version of git-cvsannotate that supports -S and on
DBD::SQLite.
Licensed under GPLv2. Copyright The Open University UK.
Authors: Martyn Smith <martyn@catalyst.net.nz>
Martin Langhoff <martin@catalyst.net.nz>
Signed-off-by: Martin Langhoff <martin@catalyst.net.nz>
Signed-off-by: Junio C Hamano <junkio@cox.net>
It turns out that the git-push documentation didn't describe what it
would do when not given a refspec, (not on the command line, nor in a
remotes file). This is fairly important for the user who is trying to
understand operations such as:
git clone git://something/some/where
# hack, hack, hack
git push origin
I tracked the mystery behavior down to git-send-pack and lifted the
relevant portion of its documentation up to git-push, (namely that all
refs existing both locally and remotely are updated).
Signed-off-by: Carl Worth <cworth@cworth.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
I found a paper thin man page for git-rebase, but was quite happy to
see something much more useful in the usage statement of the script
when I went there to find out how this thing worked. Here it is
cleaned up slightly and expanded a bit into the actual documentation.
Signed-off-by: Carl Worth <cworth@cworth.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This adds support to git-add to allow the common -- to separate
command-line options and file names. It adds documentation and a new
git-add test case as well.
[jc: this should apply to 1.2.X maintenance series, so I reworked
git-ls-files --error-unmatch test. ]
Signed-off-by: Junio C Hamano <junkio@cox.net>
A new flag -q makes underlying pack-objects less chatty.
A new flag -f forces delta to be recomputed from scratch.
Signed-off-by: Junio C Hamano <junkio@cox.net>
This introduces --no-reuse-delta option to disable reusing of
existing delta, which is a large part of the optimization
introduced by this series. This may become necessary if
repeated repacking makes delta chain too long. With this, the
output of the command becomes identical to that of the older
implementation. But the performance suffers greatly.
It still allows reusing non-deltified representations; there is
no point uncompressing and recompressing the whole text.
It also adds a couple more statistics output, while squelching
it under -q flag, which the last round forgot to do.
$ time old-git-pack-objects --stdout >/dev/null <RL
Generating pack...
Done counting 184141 objects.
Packing 184141 objects....................
real 12m8.530s user 11m1.450s sys 0m57.920s
$ time git-pack-objects --stdout >/dev/null <RL
Generating pack...
Done counting 184141 objects.
Packing 184141 objects.....................
Total 184141, written 184141 (delta 138297), reused 178833 (delta 134081)
real 0m59.549s user 0m56.670s sys 0m2.400s
$ time git-pack-objects --stdout --no-reuse-delta >/dev/null <RL
Generating pack...
Done counting 184141 objects.
Packing 184141 objects.....................
Total 184141, written 184141 (delta 134833), reused 47904 (delta 0)
real 11m13.830s user 9m45.240s sys 0m44.330s
There is one remaining issue when --no-reuse-delta option is not
used. It can create delta chains that are deeper than specified.
A<--B<--C<--D E F G
Suppose we have a delta chain A to D (A is stored in full either
in a pack or as a loose object. B is depth1 delta relative to A,
C is depth2 delta relative to B...) with loose objects E, F, G.
And we are going to pack all of them.
B, C and D are left as delta against A, B and C respectively.
So A, E, F, and G are examined for deltification, and let's say
we decided to keep E expanded, and store the rest as deltas like
this:
E<--F<--G<--A
Oops. We ended up making D a bit too deep, didn't we? B, C and
D form a chain on top of A!
This is because we did not know what the final depth of A would
be, when we checked objects and decided to keep the existing
delta. Unfortunately, deferring the decision until just before
the deltification is not an option. To be able to make B, C,
and D candidates for deltification with the rest, we need to
know the type and final unexpanded size of them, but the major
part of the optimization comes from the fact that we do not read
the delta data to do so -- getting the final size is quite an
expensive operation.
To prevent this from happening, we should keep A from being
deltified. But how would we tell that, cheaply?
To do this most precisely, after check_object() runs, each
object that is used as the base object of some existing delta
needs to be marked with the maximum depth of the objects we
decided to keep deltified (in this case, D is depth 3 relative
to A, so if no other delta chain that is longer than 3 based on
A exists, mark A with 3). Then when attempting to deltify A, we
would take that number into account to see if the final delta
chain that leads to D becomes too deep.
However, this is a bit cumbersome to compute, so we would cheat
and reduce the maximum depth for A arbitrarily to depth/4 in
this implementation.
Signed-off-by: Junio C Hamano <junkio@cox.net>
New -r flag for prepending the corresponding Subversion revision
number to each commit message.
Signed-off-by: Karl Hasselström <kha@treskal.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>
Since Junio used this in an example, and I've personally tried to use it, I
suppose the option should actually exist.
Signed-off-by: Ryan Anderson <ryan@michonline.com>
The documentation was mistakenly describing the --only semantics to
be default. The 1.2.0 release and its maintenance series 1.2.X will
keep the traditional --include semantics as the default. Clarify the
situation.
Signed-off-by: Junio C Hamano <junkio@cox.net>
This changes the "git commit paths..." to default to --only
semantics from traditional --include semantics, as agreed on the
list.
Signed-off-by: Junio C Hamano <junkio@cox.net>
This howto consists of a footnote from an email by JC to the git
mailing list (<7vfyms0x4p.fsf@assigned-by-dhcp.cox.net>).
Signed-off-by: Kent Engstrom <kent@lysator.liu.se>
Signed-off-by: Junio C Hamano <junkio@cox.net>
Currently, git-repo-config will just return the raw value of option
as specified in the config file; this makes things difficult for scripts
calling it, especially if the value is supposed to be boolean.
This patch makes it possible to ask git-repo-config to check if the option
is of the given type (int or bool) and write out the value in its
canonical form. If you do not pass --int or --bool, the behaviour stays
unchanged and the raw value is emitted.
This also incidentally fixes the segfault when option with no value is
encountered.
[jc: tweaked the option parsing a bit to make it easier to see
that the patch does not change anything but the type stuff in
the diff output. Also changed to avoid "foo ? : bar" construct. ]
Signed-off-by: Petr Baudis <pasky@suse.cz>
Signed-off-by: Junio C Hamano <junkio@cox.net>
Don't mention it in docs or --help output.
Remove mbox, date and author variables from git-format-patch.sh.
Use DESCRIPTION text from man-page to update LONG_USAGE output. It's
a bit silly to have two texts saying the same thing in different words,
and I'm too lazy to update both.
Signed-off-by: Andreas Ericsson <ae@op5.se>
Signed-off-by: Junio C Hamano <junkio@cox.net>
- "git commit" without _any_ parameter keeps the traditional
behaviour. It commits the current index.
We commit the whole index even when this form is run from a
subdirectory.
- "git commit --include paths..." (or "git commit -i paths...")
is equivalent to:
git update-index --remove paths...
git commit
- "git commit paths..." acquires a new semantics. This is an
incompatible change that needs user training, which I am
still a bit reluctant to swallow, but enough people seem to
have complained that it is confusing to them. It
1. refuses to run if $GIT_DIR/MERGE_HEAD exists, and reminds
trained git users that the traditional semantics now needs
-i flag.
2. refuses to run if named paths... are different in HEAD and
the index (ditto about reminding). Added paths are OK.
3. reads HEAD commit into a temporary index file.
4. updates named paths... from the working tree in this
temporary index.
5. does the same updates of the paths... from the working
tree to the real index.
6. makes a commit using the temporary index that has the
current HEAD as the parent, and updates the HEAD with this
new commit.
- "git commit --all" can run from a subdirectory, but it updates
the index with all the modified files and does a whole tree
commit.
- In all cases, when the command decides not to create a new
commit, the index is left as it was before the command is
run. This means that the two "git diff" in the following
sequence:
$ git diff
$ git commit -a
$ git diff
would show the same diff if you abort the commit process by
making the commit log message empty.
This commit also introduces much requested --author option.
$ git commit --author 'A U Thor <author@example.com>'
Signed-off-by: Junio C Hamano <junkio@cox.net>
In a workflow that employs relatively long lived topic branches,
the developer sometimes needs to resolve the same conflict over
and over again until the topic branches are done (either merged
to the "release" branch, or sent out and accepted upstream).
This commit introduces a new command, "git rerere", to help this
process by recording the conflicted automerge results and
corresponding hand-resolve results on the initial manual merge,
and later by noticing the same conflicted automerge and applying
the previously recorded hand resolution using three-way merge.
Signed-off-by: Junio C Hamano <junkio@cox.net>
The sections on git urls and remotes files in the git-fetch,
git-pull, and git-push manpages seem long enough to be worth a
manpage section of their own.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Junio C Hamano <junkio@cox.net>
The push and pull man pages include a bunch of shared text from
pull-fetch-param.txt. This simplifies maintenance somewhat, but
there's actually quite a bit of text that applies only to one or the
other.
So, separate out the push- and pull/fetch-specific text into
pull-fetch-param.txt and git-push.txt, then include the largest chunk
of common stuff (the description of protocols and url's) from
urls.txt. That cuts some irrelevant stuff from the man pages without
making us duplicate too much.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Junio C Hamano <junkio@cox.net>
We still talked about HEAD symlinks but these days we use
symrefs by default.
Also 'failed/prevented' message is now gone from the merge
output.
Signed-off-by: Junio C Hamano <junkio@cox.net>
Also reorganizes the man page to list options alphabetically.
Signed-off-by: Ryan Anderson <ryan@michonline.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>
Earlier, we made --base-path to automatically forbid
user-relative paths, which was probably a mistake. This
introduces --user-path (or --user-path=path) option to control
the use of user-relative paths independently. The latter form
of the option can be used to restrict accesses to a part of each
user's home directory, similar to "public_html" some webservers
supports.
If we're invoked with --user-path=FOO option, then a URL of the
form git://~USER/PATH/... resolves to the path HOME/FOO/PATH/...,
where HOME is USER's home directory.
[jc: This is much reworked by me so bugs are mine, but the
original patch was done by Mark Wooding.]
Signed-off-by: Junio C Hamano <junkio@cox.net>
A misguided attempt to show logs at all time was inserted only to
the documentation of this flag. Worse yet, it was not even implemented,
causing more confusion. Drop it.
We might want to have an option to show --pretty even when there is no
diff output, but that is applicable to all forms of diff, not just --cc.
Signed-off-by: Junio C Hamano <junkio@cox.net>
This only applies to traditional diffs, not to git diffs.
Signed-off-by: Daniel Barkalow <barkalow@iabervon.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
Here's some changes to the cvs-migration.txt. As usual, in my attempt
to make things clearer someone may have found I've made them less so, or
I may have just gotten something wrong; so any review is welcomed.
I can break up this sort of thing into smaller steps if preferred, the
monolothic patch is just a bit simpler for me for this sort of
thing.
I moved the material describing shared repository management from
core-tutorial.txt to cvs-migration.txt, where it seems more appropriate,
and combined two sections to eliminate some redundancy.
I also revised the earlier sections of cvs-migration.txt, mainly trying
to make it more concise.
I've left the last section of cvs-migration.txt (on CVS annotate
alternatives) alone for now.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Junio C Hamano <junkio@cox.net>
Johannes noticed the recent addition of this new flag
inadvertently took over existing --update-head-ok (-u). Require
longer abbreviation to this new option which would be needed in
a rare setup.
Signed-off-by: Junio C Hamano <junkio@cox.net>
Without this, there is no way to specify a remote executable when
invoking git-pull/git-fetch as there is for git-clone.
[jc: I have a mild suspicion that this is a broken environment (aka
sysadmin disservice). It may be legal to configure your sshd to
spawn named program without involving shell at all, and if your
sysadmin does so and you have your git programs under your home
directory, you would need something like this, but then I suspect
you would need such workaround everywhere, not just git. But we
have these options we can use to work around the issue, so there
is no strong reason not to reject this patch, either. ]
Signed-off-by: Michal Ostrowski <mostrows@watson.ibm.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>
asciidoc 7.0.4 and newer considers such includes from parent directory
unsafe.
Signed-off-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
We forgot to update the primary link from git.html leading to
the tutorial, and also forgot to build and install the renamed
core-tutorial document.
Signed-off-by: Junio C Hamano <junkio@cox.net>
It is a common mistake to leave an unsed `origin` branch behind
if a shared public repository was created by first cloning from
somewhere else. Subsequent `git push` into it with the default
"push all the matching ref" would push the `origin` branch from
the developer repository uselessly.
Signed-off-by: Junio C Hamano <junkio@cox.net>
The current Documentation/tutorial.txt concentrates on the lower-level
git interfaces. So it's useful to people developing alternative
porcelains, to advanced users, etc., but not so much to beginning users.
I think it makes sense for the main tutorial to address those
beginnning users, so with this patch I'm proposing that we move
Documentation/tutorial.txt to Documentation/core-tutorial.txt and
replace it by a new tutorial.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Junio C Hamano <junkio@cox.net>
Junio C Hamano