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Merge branch 'jc/pack-reuse'

* jc/pack-reuse:
  git-repack: allow passing a couple of flags to pack-objects.
  pack-objects: finishing touches.
  pack-objects: reuse data from existing packs.
  Add contrib/gitview from Aneesh.
  git-svn: ensure fetch always works chronologically.
  git-svn: fix revision order when XML::Simple is not loaded
  Introducing contrib/git-svn.
  Allow building Git in systems without iconv
This commit is contained in:
Junio C Hamano 2006-02-17 02:12:19 -08:00
commit 07e8ab9be9
11 changed files with 2392 additions and 69 deletions

View file

@ -8,7 +8,10 @@ git-pack-objects - Create a packed archive of objects.
SYNOPSIS
--------
'git-pack-objects' [--non-empty] [--local] [--incremental] [--window=N] [--depth=N] {--stdout | base-name} < object-list
[verse]
'git-pack-objects' [-q] [--no-reuse-delta] [--non-empty]
[--local] [--incremental] [--window=N] [--depth=N]
{--stdout | base-name} < object-list
DESCRIPTION
@ -32,6 +35,10 @@ Placing both in the pack/ subdirectory of $GIT_OBJECT_DIRECTORY (or
any of the directories on $GIT_ALTERNATE_OBJECT_DIRECTORIES)
enables git to read from such an archive.
In a packed archive, an object is either stored as a compressed
whole, or as a difference from some other object. The latter is
often called a delta.
OPTIONS
-------
@ -74,6 +81,18 @@ base-name::
Only create a packed archive if it would contain at
least one object.
-q::
This flag makes the command not to report its progress
on the standard error stream.
--no-reuse-delta::
When creating a packed archive in a repository that
has existing packs, the command reuses existing deltas.
This sometimes results in a slightly suboptimal pack.
This flag tells the command not to reuse existing deltas
but compute them from scratch.
Author
------
Written by Linus Torvalds <torvalds@osdl.org>

View file

@ -9,7 +9,7 @@ objects into pack files.
SYNOPSIS
--------
'git-repack' [-a] [-d] [-l] [-n]
'git-repack' [-a] [-d] [-f] [-l] [-n] [-q]
DESCRIPTION
-----------
@ -43,6 +43,14 @@ OPTIONS
Pass the `--local` option to `git pack-objects`, see
gitlink:git-pack-objects[1].
-f::
Pass the `--no-reuse-delta` option to `git pack-objects`, see
gitlink:git-pack-objects[1].
-q::
Pass the `-q` option to `git pack-objects`, see
gitlink:git-pack-objects[1].
-n::
Do not update the server information with
`git update-server-info`.

View file

@ -53,6 +53,8 @@ all:
# Define NO_SOCKADDR_STORAGE if your platform does not have struct
# sockaddr_storage.
#
# Define NO_ICONV if your libc does not properly support iconv.
#
# Define COLLISION_CHECK below if you believe that SHA1's
# 1461501637330902918203684832716283019655932542976 hashes do not give you
# sufficient guarantee that no collisions between objects will ever happen.
@ -380,6 +382,10 @@ else
endif
endif
ifdef NO_ICONV
ALL_CFLAGS += -DNO_ICONV
endif
ifdef PPC_SHA1
SHA1_HEADER = "ppc/sha1.h"
LIB_OBJS += ppc/sha1.o ppc/sha1ppc.o

771
contrib/git-svn/git-svn Executable file
View file

@ -0,0 +1,771 @@
#!/usr/bin/env perl
use warnings;
use strict;
use vars qw/ $AUTHOR $VERSION
$SVN_URL $SVN_INFO $SVN_WC
$GIT_SVN_INDEX $GIT_SVN
$GIT_DIR $REV_DIR/;
$AUTHOR = 'Eric Wong <normalperson@yhbt.net>';
$VERSION = '0.9.0';
$GIT_DIR = $ENV{GIT_DIR} || "$ENV{PWD}/.git";
$GIT_SVN = $ENV{GIT_SVN_ID} || 'git-svn';
$GIT_SVN_INDEX = "$GIT_DIR/$GIT_SVN/index";
$ENV{GIT_DIR} ||= $GIT_DIR;
$SVN_URL = undef;
$REV_DIR = "$GIT_DIR/$GIT_SVN/revs";
$SVN_WC = "$GIT_DIR/$GIT_SVN/tree";
# make sure the svn binary gives consistent output between locales and TZs:
$ENV{TZ} = 'UTC';
$ENV{LC_ALL} = 'C';
# If SVN:: library support is added, please make the dependencies
# optional and preserve the capability to use the command-line client.
# See what I do with XML::Simple to make the dependency optional.
use Carp qw/croak/;
use IO::File qw//;
use File::Basename qw/dirname basename/;
use File::Path qw/mkpath/;
use Getopt::Long qw/:config gnu_getopt no_ignore_case auto_abbrev/;
use File::Spec qw//;
my $sha1 = qr/[a-f\d]{40}/;
my $sha1_short = qr/[a-f\d]{6,40}/;
my ($_revision,$_stdin,$_no_ignore_ext,$_no_stop_copy,$_help,$_rmdir,$_edit);
GetOptions( 'revision|r=s' => \$_revision,
'no-ignore-externals' => \$_no_ignore_ext,
'stdin|' => \$_stdin,
'edit|e' => \$_edit,
'rmdir' => \$_rmdir,
'help|H|h' => \$_help,
'no-stop-copy' => \$_no_stop_copy );
my %cmd = (
fetch => [ \&fetch, "Download new revisions from SVN" ],
init => [ \&init, "Initialize and fetch (import)"],
commit => [ \&commit, "Commit git revisions to SVN" ],
rebuild => [ \&rebuild, "Rebuild git-svn metadata (after git clone)" ],
help => [ \&usage, "Show help" ],
);
my $cmd;
for (my $i = 0; $i < @ARGV; $i++) {
if (defined $cmd{$ARGV[$i]}) {
$cmd = $ARGV[$i];
splice @ARGV, $i, 1;
last;
}
};
# we may be called as git-svn-(command), or git-svn(command).
foreach (keys %cmd) {
if (/git\-svn\-?($_)(?:\.\w+)?$/) {
$cmd = $1;
last;
}
}
usage(0) if $_help;
usage(1) unless (defined $cmd);
svn_check_ignore_externals();
$cmd{$cmd}->[0]->(@ARGV);
exit 0;
####################### primary functions ######################
sub usage {
my $exit = shift || 0;
my $fd = $exit ? \*STDERR : \*STDOUT;
print $fd <<"";
git-svn - bidirectional operations between a single Subversion tree and git
Usage: $0 <command> [options] [arguments]\n
Available commands:
foreach (sort keys %cmd) {
print $fd ' ',pack('A10',$_),$cmd{$_}->[1],"\n";
}
print $fd <<"";
\nGIT_SVN_ID may be set in the environment to an arbitrary identifier if
you're tracking multiple SVN branches/repositories in one git repository
and want to keep them separate.
exit $exit;
}
sub rebuild {
$SVN_URL = shift or undef;
my $repo_uuid;
my $newest_rev = 0;
my $pid = open(my $rev_list,'-|');
defined $pid or croak $!;
if ($pid == 0) {
exec("git-rev-list","$GIT_SVN-HEAD") or croak $!;
}
my $first;
while (<$rev_list>) {
chomp;
my $c = $_;
croak "Non-SHA1: $c\n" unless $c =~ /^$sha1$/o;
my @commit = grep(/^git-svn-id: /,`git-cat-file commit $c`);
next if (!@commit); # skip merges
my $id = $commit[$#commit];
my ($url, $rev, $uuid) = ($id =~ /^git-svn-id:\s(\S+?)\@(\d+)
\s([a-f\d\-]+)$/x);
if (!$rev || !$uuid || !$url) {
# some of the original repositories I made had
# indentifiers like this:
($rev, $uuid) = ($id =~/^git-svn-id:\s(\d+)
\@([a-f\d\-]+)/x);
if (!$rev || !$uuid) {
croak "Unable to extract revision or UUID from ",
"$c, $id\n";
}
}
print "r$rev = $c\n";
unless (defined $first) {
if (!$SVN_URL && !$url) {
croak "SVN repository location required: $url\n";
}
$SVN_URL ||= $url;
$repo_uuid = setup_git_svn();
$first = $rev;
}
if ($uuid ne $repo_uuid) {
croak "Repository UUIDs do not match!\ngot: $uuid\n",
"expected: $repo_uuid\n";
}
assert_revision_eq_or_unknown($rev, $c);
sys('git-update-ref',"$GIT_SVN/revs/$rev",$c);
$newest_rev = $rev if ($rev > $newest_rev);
}
close $rev_list or croak $?;
if (!chdir $SVN_WC) {
my @svn_co = ('svn','co',"-r$first");
push @svn_co, '--ignore-externals' unless $_no_ignore_ext;
sys(@svn_co, $SVN_URL, $SVN_WC);
chdir $SVN_WC or croak $!;
}
$pid = fork;
defined $pid or croak $!;
if ($pid == 0) {
my @svn_up = qw(svn up);
push @svn_up, '--ignore-externals' unless $_no_ignore_ext;
sys(@svn_up,"-r$newest_rev");
$ENV{GIT_INDEX_FILE} = $GIT_SVN_INDEX;
git_addremove();
exec('git-write-tree');
}
waitpid $pid, 0;
}
sub init {
$SVN_URL = shift or croak "SVN repository location required\n";
unless (-d $GIT_DIR) {
sys('git-init-db');
}
setup_git_svn();
}
sub fetch {
my (@parents) = @_;
$SVN_URL ||= file_to_s("$GIT_DIR/$GIT_SVN/info/url");
my @log_args = -d $SVN_WC ? ($SVN_WC) : ($SVN_URL);
unless ($_revision) {
$_revision = -d $SVN_WC ? 'BASE:HEAD' : '0:HEAD';
}
push @log_args, "-r$_revision";
push @log_args, '--stop-on-copy' unless $_no_stop_copy;
eval { require XML::Simple or croak $! };
my $svn_log = $@ ? svn_log_raw(@log_args) : svn_log_xml(@log_args);
@$svn_log = sort { $a->{revision} <=> $b->{revision} } @$svn_log;
my $base = shift @$svn_log or croak "No base revision!\n";
my $last_commit = undef;
unless (-d $SVN_WC) {
my @svn_co = ('svn','co',"-r$base->{revision}");
push @svn_co,'--ignore-externals' unless $_no_ignore_ext;
sys(@svn_co, $SVN_URL, $SVN_WC);
chdir $SVN_WC or croak $!;
$last_commit = git_commit($base, @parents);
unless (-f "$GIT_DIR/refs/heads/master") {
sys(qw(git-update-ref refs/heads/master),$last_commit);
}
assert_svn_wc_clean($base->{revision}, $last_commit);
} else {
chdir $SVN_WC or croak $!;
$last_commit = file_to_s("$REV_DIR/$base->{revision}");
}
my @svn_up = qw(svn up);
push @svn_up, '--ignore-externals' unless $_no_ignore_ext;
my $last_rev = $base->{revision};
foreach my $log_msg (@$svn_log) {
assert_svn_wc_clean($last_rev, $last_commit);
$last_rev = $log_msg->{revision};
sys(@svn_up,"-r$last_rev");
$last_commit = git_commit($log_msg, $last_commit, @parents);
}
assert_svn_wc_clean($last_rev, $last_commit);
return pop @$svn_log;
}
sub commit {
my (@commits) = @_;
if ($_stdin || !@commits) {
print "Reading from stdin...\n";
@commits = ();
while (<STDIN>) {
if (/^([a-f\d]{6,40})\b/) {
unshift @commits, $1;
}
}
}
my @revs;
foreach (@commits) {
push @revs, (safe_qx('git-rev-parse',$_));
}
chomp @revs;
fetch();
chdir $SVN_WC or croak $!;
my $svn_current_rev = svn_info('.')->{'Last Changed Rev'};
foreach my $c (@revs) {
print "Committing $c\n";
svn_checkout_tree($svn_current_rev, $c);
$svn_current_rev = svn_commit_tree($svn_current_rev, $c);
}
print "Done committing ",scalar @revs," revisions to SVN\n";
}
########################### utility functions #########################
sub setup_git_svn {
defined $SVN_URL or croak "SVN repository location required\n";
unless (-d $GIT_DIR) {
croak "GIT_DIR=$GIT_DIR does not exist!\n";
}
mkpath(["$GIT_DIR/$GIT_SVN"]);
mkpath(["$GIT_DIR/$GIT_SVN/info"]);
mkpath([$REV_DIR]);
s_to_file($SVN_URL,"$GIT_DIR/$GIT_SVN/info/url");
my $uuid = svn_info($SVN_URL)->{'Repository UUID'} or
croak "Repository UUID unreadable\n";
s_to_file($uuid,"$GIT_DIR/$GIT_SVN/info/uuid");
open my $fd, '>>', "$GIT_DIR/$GIT_SVN/info/exclude" or croak $!;
print $fd '.svn',"\n";
close $fd or croak $!;
return $uuid;
}
sub assert_svn_wc_clean {
my ($svn_rev, $commit) = @_;
croak "$svn_rev is not an integer!\n" unless ($svn_rev =~ /^\d+$/);
croak "$commit is not a sha1!\n" unless ($commit =~ /^$sha1$/o);
my $svn_info = svn_info('.');
if ($svn_rev != $svn_info->{'Last Changed Rev'}) {
croak "Expected r$svn_rev, got r",
$svn_info->{'Last Changed Rev'},"\n";
}
my @status = grep(!/^Performing status on external/,(`svn status`));
@status = grep(!/^\s*$/,@status);
if (scalar @status) {
print STDERR "Tree ($SVN_WC) is not clean:\n";
print STDERR $_ foreach @status;
croak;
}
my ($tree_a) = grep(/^tree $sha1$/o,`git-cat-file commit $commit`);
$tree_a =~ s/^tree //;
chomp $tree_a;
chomp(my $tree_b = `GIT_INDEX_FILE=$GIT_SVN_INDEX git-write-tree`);
if ($tree_a ne $tree_b) {
croak "$svn_rev != $commit, $tree_a != $tree_b\n";
}
}
sub parse_diff_tree {
my $diff_fh = shift;
local $/ = "\0";
my $state = 'meta';
my @mods;
while (<$diff_fh>) {
chomp $_; # this gets rid of the trailing "\0"
print $_,"\n";
if ($state eq 'meta' && /^:(\d{6})\s(\d{6})\s
$sha1\s($sha1)\s([MTCRAD])\d*$/xo) {
push @mods, { mode_a => $1, mode_b => $2,
sha1_b => $3, chg => $4 };
if ($4 =~ /^(?:C|R)$/) {
$state = 'file_a';
} else {
$state = 'file_b';
}
} elsif ($state eq 'file_a') {
my $x = $mods[$#mods] or croak __LINE__,": Empty array\n";
if ($x->{chg} !~ /^(?:C|R)$/) {
croak __LINE__,": Error parsing $_, $x->{chg}\n";
}
$x->{file_a} = $_;
$state = 'file_b';
} elsif ($state eq 'file_b') {
my $x = $mods[$#mods] or croak __LINE__,": Empty array\n";
if (exists $x->{file_a} && $x->{chg} !~ /^(?:C|R)$/) {
croak __LINE__,": Error parsing $_, $x->{chg}\n";
}
if (!exists $x->{file_a} && $x->{chg} =~ /^(?:C|R)$/) {
croak __LINE__,": Error parsing $_, $x->{chg}\n";
}
$x->{file_b} = $_;
$state = 'meta';
} else {
croak __LINE__,": Error parsing $_\n";
}
}
close $diff_fh or croak $!;
return \@mods;
}
sub svn_check_prop_executable {
my $m = shift;
if ($m->{mode_b} =~ /755$/ && $m->{mode_a} !~ /755$/) {
sys(qw(svn propset svn:executable 1), $m->{file_b});
} elsif ($m->{mode_b} !~ /755$/ && $m->{mode_a} =~ /755$/) {
sys(qw(svn propdel svn:executable), $m->{file_b});
}
}
sub svn_ensure_parent_path {
my $dir_b = dirname(shift);
svn_ensure_parent_path($dir_b) if ($dir_b ne File::Spec->curdir);
mkpath([$dir_b]) unless (-d $dir_b);
sys(qw(svn add -N), $dir_b) unless (-d "$dir_b/.svn");
}
sub svn_checkout_tree {
my ($svn_rev, $commit) = @_;
my $from = file_to_s("$REV_DIR/$svn_rev");
assert_svn_wc_clean($svn_rev,$from);
print "diff-tree '$from' '$commit'\n";
my $pid = open my $diff_fh, '-|';
defined $pid or croak $!;
if ($pid == 0) {
exec(qw(git-diff-tree -z -r -C), $from, $commit) or croak $!;
}
my $mods = parse_diff_tree($diff_fh);
unless (@$mods) {
# git can do empty commits, SVN doesn't allow it...
return $svn_rev;
}
my %rm;
foreach my $m (@$mods) {
if ($m->{chg} eq 'C') {
svn_ensure_parent_path( $m->{file_b} );
sys(qw(svn cp), $m->{file_a}, $m->{file_b});
blob_to_file( $m->{sha1_b}, $m->{file_b});
svn_check_prop_executable($m);
} elsif ($m->{chg} eq 'D') {
$rm{dirname $m->{file_b}}->{basename $m->{file_b}} = 1;
sys(qw(svn rm --force), $m->{file_b});
} elsif ($m->{chg} eq 'R') {
svn_ensure_parent_path( $m->{file_b} );
sys(qw(svn mv --force), $m->{file_a}, $m->{file_b});
blob_to_file( $m->{sha1_b}, $m->{file_b});
svn_check_prop_executable($m);
$rm{dirname $m->{file_a}}->{basename $m->{file_a}} = 1;
} elsif ($m->{chg} eq 'M') {
if ($m->{mode_b} =~ /^120/ && $m->{mode_a} =~ /^120/) {
unlink $m->{file_b} or croak $!;
blob_to_symlink($m->{sha1_b}, $m->{file_b});
} else {
blob_to_file($m->{sha1_b}, $m->{file_b});
}
svn_check_prop_executable($m);
} elsif ($m->{chg} eq 'T') {
sys(qw(svn rm --force),$m->{file_b});
if ($m->{mode_b} =~ /^120/ && $m->{mode_a} =~ /^100/) {
blob_to_symlink($m->{sha1_b}, $m->{file_b});
} else {
blob_to_file($m->{sha1_b}, $m->{file_b});
}
svn_check_prop_executable($m);
sys(qw(svn add --force), $m->{file_b});
} elsif ($m->{chg} eq 'A') {
svn_ensure_parent_path( $m->{file_b} );
blob_to_file( $m->{sha1_b}, $m->{file_b});
if ($m->{mode_b} =~ /755$/) {
chmod 0755, $m->{file_b};
}
sys(qw(svn add --force), $m->{file_b});
} else {
croak "Invalid chg: $m->{chg}\n";
}
}
if ($_rmdir) {
my $old_index = $ENV{GIT_INDEX_FILE};
$ENV{GIT_INDEX_FILE} = $GIT_SVN_INDEX;
foreach my $dir (keys %rm) {
my $files = $rm{$dir};
my @files;
foreach (safe_qx('svn','ls',$dir)) {
chomp;
push @files, $_ unless $files->{$_};
}
sys(qw(svn rm),$dir) unless @files;
}
if ($old_index) {
$ENV{GIT_INDEX_FILE} = $old_index;
} else {
delete $ENV{GIT_INDEX_FILE};
}
}
}
sub svn_commit_tree {
my ($svn_rev, $commit) = @_;
my $commit_msg = "$GIT_DIR/$GIT_SVN/.svn-commit.tmp.$$";
open my $msg, '>', $commit_msg or croak $!;
chomp(my $type = `git-cat-file -t $commit`);
if ($type eq 'commit') {
my $pid = open my $msg_fh, '-|';
defined $pid or croak $!;
if ($pid == 0) {
exec(qw(git-cat-file commit), $commit) or croak $!;
}
my $in_msg = 0;
while (<$msg_fh>) {
if (!$in_msg) {
$in_msg = 1 if (/^\s*$/);
} else {
print $msg $_ or croak $!;
}
}
close $msg_fh or croak $!;
}
close $msg or croak $!;
if ($_edit || ($type eq 'tree')) {
my $editor = $ENV{VISUAL} || $ENV{EDITOR} || 'vi';
system($editor, $commit_msg);
}
my @ci_output = safe_qx(qw(svn commit -F),$commit_msg);
my ($committed) = grep(/^Committed revision \d+\./,@ci_output);
unlink $commit_msg;
defined $committed or croak
"Commit output failed to parse committed revision!\n",
join("\n",@ci_output),"\n";
my ($rev_committed) = ($committed =~ /^Committed revision (\d+)\./);
# resync immediately
my @svn_up = (qw(svn up), "-r$svn_rev");
push @svn_up, '--ignore-externals' unless $_no_ignore_ext;
sys(@svn_up);
return fetch("$rev_committed=$commit")->{revision};
}
sub svn_log_xml {
my (@log_args) = @_;
my $log_fh = IO::File->new_tmpfile or croak $!;
my $pid = fork;
defined $pid or croak $!;
if ($pid == 0) {
open STDOUT, '>&', $log_fh or croak $!;
exec (qw(svn log --xml), @log_args) or croak $!
}
waitpid $pid, 0;
croak $? if $?;
seek $log_fh, 0, 0;
my @svn_log;
my $log = XML::Simple::XMLin( $log_fh,
ForceArray => ['path','revision','logentry'],
KeepRoot => 0,
KeyAttr => { logentry => '+revision',
paths => '+path' },
)->{logentry};
foreach my $r (sort {$a <=> $b} keys %$log) {
my $log_msg = $log->{$r};
my ($Y,$m,$d,$H,$M,$S) = ($log_msg->{date} =~
/(\d{4})\-(\d\d)\-(\d\d)T
(\d\d)\:(\d\d)\:(\d\d)\.\d+Z$/x)
or croak "Failed to parse date: ",
$log->{$r}->{date};
$log_msg->{date} = "+0000 $Y-$m-$d $H:$M:$S";
# XML::Simple can't handle <msg></msg> as a string:
if (ref $log_msg->{msg} eq 'HASH') {
$log_msg->{msg} = "\n";
} else {
$log_msg->{msg} .= "\n";
}
push @svn_log, $log->{$r};
}
return \@svn_log;
}
sub svn_log_raw {
my (@log_args) = @_;
my $pid = open my $log_fh,'-|';
defined $pid or croak $!;
if ($pid == 0) {
exec (qw(svn log), @log_args) or croak $!
}
my @svn_log;
my $state;
while (<$log_fh>) {
chomp;
if (/^\-{72}$/) {
$state = 'rev';
# if we have an empty log message, put something there:
if (@svn_log) {
$svn_log[$#svn_log]->{msg} ||= "\n";
}
next;
}
if ($state eq 'rev' && s/^r(\d+)\s*\|\s*//) {
my $rev = $1;
my ($author, $date) = split(/\s*\|\s*/, $_, 2);
my ($Y,$m,$d,$H,$M,$S,$tz) = ($date =~
/(\d{4})\-(\d\d)\-(\d\d)\s
(\d\d)\:(\d\d)\:(\d\d)\s([\-\+]\d+)/x)
or croak "Failed to parse date: $date\n";
my %log_msg = ( revision => $rev,
date => "$tz $Y-$m-$d $H:$M:$S",
author => $author,
msg => '' );
push @svn_log, \%log_msg;
$state = 'msg_start';
next;
}
# skip the first blank line of the message:
if ($state eq 'msg_start' && /^$/) {
$state = 'msg';
} elsif ($state eq 'msg') {
$svn_log[$#svn_log]->{msg} .= $_."\n";
}
}
close $log_fh or croak $?;
return \@svn_log;
}
sub svn_info {
my $url = shift || $SVN_URL;
my $pid = open my $info_fh, '-|';
defined $pid or croak $!;
if ($pid == 0) {
exec(qw(svn info),$url) or croak $!;
}
my $ret = {};
# only single-lines seem to exist in svn info output
while (<$info_fh>) {
chomp $_;
if (m#^([^:]+)\s*:\s*(\S*)$#) {
$ret->{$1} = $2;
push @{$ret->{-order}}, $1;
}
}
close $info_fh or croak $!;
return $ret;
}
sub sys { system(@_) == 0 or croak $? }
sub git_addremove {
system( "git-ls-files -z --others ".
"'--exclude-from=$GIT_DIR/$GIT_SVN/info/exclude'".
"| git-update-index --add -z --stdin; ".
"git-ls-files -z --deleted ".
"| git-update-index --remove -z --stdin; ".
"git-ls-files -z --modified".
"| git-update-index -z --stdin") == 0 or croak $?
}
sub s_to_file {
my ($str, $file, $mode) = @_;
open my $fd,'>',$file or croak $!;
print $fd $str,"\n" or croak $!;
close $fd or croak $!;
chmod ($mode &~ umask, $file) if (defined $mode);
}
sub file_to_s {
my $file = shift;
open my $fd,'<',$file or croak "$!: file: $file\n";
local $/;
my $ret = <$fd>;
close $fd or croak $!;
$ret =~ s/\s*$//s;
return $ret;
}
sub assert_revision_unknown {
my $revno = shift;
if (-f "$REV_DIR/$revno") {
croak "$REV_DIR/$revno already exists! ",
"Why are we refetching it?";
}
}
sub assert_revision_eq_or_unknown {
my ($revno, $commit) = @_;
if (-f "$REV_DIR/$revno") {
my $current = file_to_s("$REV_DIR/$revno");
if ($commit ne $current) {
croak "$REV_DIR/$revno already exists!\n",
"current: $current\nexpected: $commit\n";
}
return;
}
}
sub git_commit {
my ($log_msg, @parents) = @_;
assert_revision_unknown($log_msg->{revision});
my $out_fh = IO::File->new_tmpfile or croak $!;
my $info = svn_info('.');
my $uuid = $info->{'Repository UUID'};
defined $uuid or croak "Unable to get Repository UUID\n";
# commit parents can be conditionally bound to a particular
# svn revision via: "svn_revno=commit_sha1", filter them out here:
my @exec_parents;
foreach my $p (@parents) {
next unless defined $p;
if ($p =~ /^(\d+)=($sha1_short)$/o) {
if ($1 == $log_msg->{revision}) {
push @exec_parents, $2;
}
} else {
push @exec_parents, $p if $p =~ /$sha1_short/o;
}
}
my $pid = fork;
defined $pid or croak $!;
if ($pid == 0) {
$ENV{GIT_INDEX_FILE} = $GIT_SVN_INDEX;
git_addremove();
chomp(my $tree = `git-write-tree`);
croak if $?;
my $msg_fh = IO::File->new_tmpfile or croak $!;
print $msg_fh $log_msg->{msg}, "\ngit-svn-id: ",
"$SVN_URL\@$log_msg->{revision}",
" $uuid\n" or croak $!;
$msg_fh->flush == 0 or croak $!;
seek $msg_fh, 0, 0 or croak $!;
$ENV{GIT_AUTHOR_NAME} = $ENV{GIT_COMMITTER_NAME} =
$log_msg->{author};
$ENV{GIT_AUTHOR_EMAIL} = $ENV{GIT_COMMITTER_EMAIL} =
$log_msg->{author}."\@$uuid";
$ENV{GIT_AUTHOR_DATE} = $ENV{GIT_COMMITTER_DATE} =
$log_msg->{date};
my @exec = ('git-commit-tree',$tree);
push @exec, '-p', $_ foreach @exec_parents;
open STDIN, '<&', $msg_fh or croak $!;
open STDOUT, '>&', $out_fh or croak $!;
exec @exec or croak $!;
}
waitpid($pid,0);
croak if $?;
$out_fh->flush == 0 or croak $!;
seek $out_fh, 0, 0 or croak $!;
chomp(my $commit = do { local $/; <$out_fh> });
if ($commit !~ /^$sha1$/o) {
croak "Failed to commit, invalid sha1: $commit\n";
}
my @update_ref = ('git-update-ref',"refs/heads/$GIT_SVN-HEAD",$commit);
if (my $primary_parent = shift @exec_parents) {
push @update_ref, $primary_parent;
}
sys(@update_ref);
sys('git-update-ref',"$GIT_SVN/revs/$log_msg->{revision}",$commit);
print "r$log_msg->{revision} = $commit\n";
return $commit;
}
sub blob_to_symlink {
my ($blob, $link) = @_;
defined $link or croak "\$link not defined!\n";
croak "Not a sha1: $blob\n" unless $blob =~ /^$sha1$/o;
my $dest = `git-cat-file blob $blob`; # no newline, so no chomp
symlink $dest, $link or croak $!;
}
sub blob_to_file {
my ($blob, $file) = @_;
defined $file or croak "\$file not defined!\n";
croak "Not a sha1: $blob\n" unless $blob =~ /^$sha1$/o;
open my $blob_fh, '>', $file or croak "$!: $file\n";
my $pid = fork;
defined $pid or croak $!;
if ($pid == 0) {
open STDOUT, '>&', $blob_fh or croak $!;
exec('git-cat-file','blob',$blob);
}
waitpid $pid, 0;
croak $? if $?;
close $blob_fh or croak $!;
}
sub safe_qx {
my $pid = open my $child, '-|';
defined $pid or croak $!;
if ($pid == 0) {
exec(@_) or croak $?;
}
my @ret = (<$child>);
close $child or croak $?;
die $? if $?; # just in case close didn't error out
return wantarray ? @ret : join('',@ret);
}
sub svn_check_ignore_externals {
return if $_no_ignore_ext;
unless (grep /ignore-externals/,(safe_qx(qw(svn co -h)))) {
print STDERR "W: Installed svn version does not support ",
"--ignore-externals\n";
$_no_ignore_ext = 1;
}
}
__END__
Data structures:
@svn_log = array of log_msg hashes
$log_msg hash
{
msg => 'whitespace-formatted log entry
', # trailing newline is preserved
revision => '8', # integer
date => '2004-02-24T17:01:44.108345Z', # commit date
author => 'committer name'
};
@mods = array of diff-index line hashes, each element represents one line
of diff-index output
diff-index line ($m hash)
{
mode_a => first column of diff-index output, no leading ':',
mode_b => second column of diff-index output,
sha1_b => sha1sum of the final blob,
chg => change type [MCRAD],
file_a => original file name of a file (iff chg is 'C' or 'R')
file_b => new/current file name of a file (any chg)
}
;

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git-svn(1)
==========
NAME
----
git-svn - bidirectional operation between a single Subversion branch and git
SYNOPSIS
--------
'git-svn' <command> [options] [arguments]
DESCRIPTION
-----------
git-svn is a simple conduit for changesets between a single Subversion
branch and git.
git-svn is not to be confused with git-svnimport. The were designed
with very different goals in mind.
git-svn is designed for an individual developer who wants a
bidirectional flow of changesets between a single branch in Subversion
and an arbitrary number of branches in git. git-svnimport is designed
for read-only operation on repositories that match a particular layout
(albeit the recommended one by SVN developers).
For importing svn, git-svnimport is potentially more powerful when
operating on repositories organized under the recommended
trunk/branch/tags structure, and should be faster, too.
git-svn completely ignores the very limited view of branching that
Subversion has. This allows git-svn to be much easier to use,
especially on repositories that are not organized in a manner that
git-svnimport is designed for.
COMMANDS
--------
init::
Creates an empty git repository with additional metadata
directories for git-svn. The SVN_URL must be specified
at this point.
fetch::
Fetch unfetched revisions from the SVN_URL we are tracking.
refs/heads/git-svn-HEAD will be updated to the latest revision.
commit::
Commit specified commit or tree objects to SVN. This relies on
your imported fetch data being up-to-date. This makes
absolutely no attempts to do patching when committing to SVN, it
simply overwrites files with those specified in the tree or
commit. All merging is assumed to have taken place
independently of git-svn functions.
rebuild::
Not a part of daily usage, but this is a useful command if
you've just cloned a repository (using git-clone) that was
tracked with git-svn. Unfortunately, git-clone does not clone
git-svn metadata and the svn working tree that git-svn uses for
its operations. This rebuilds the metadata so git-svn can
resume fetch operations. SVN_URL may be optionally specified if
the directory/repository you're tracking has moved or changed
protocols.
OPTIONS
-------
-r <ARG>::
--revision <ARG>::
Only used with the 'fetch' command.
Takes any valid -r<argument> svn would accept and passes it
directly to svn. -r<ARG1>:<ARG2> ranges and "{" DATE "}" syntax
is also supported. This is passed directly to svn, see svn
documentation for more details.
This can allow you to make partial mirrors when running fetch.
-::
--stdin::
Only used with the 'commit' command.
Read a list of commits from stdin and commit them in reverse
order. Only the leading sha1 is read from each line, so
git-rev-list --pretty=oneline output can be used.
--rmdir::
Only used with the 'commit' command.
Remove directories from the SVN tree if there are no files left
behind. SVN can version empty directories, and they are not
removed by default if there are no files left in them. git
cannot version empty directories. Enabling this flag will make
the commit to SVN act like git.
-e::
--edit::
Only used with the 'commit' command.
Edit the commit message before committing to SVN. This is off by
default for objects that are commits, and forced on when committing
tree objects.
COMPATIBILITY OPTIONS
---------------------
--no-ignore-externals::
Only used with the 'fetch' and 'rebuild' command.
By default, git-svn passes --ignore-externals to svn to avoid
fetching svn:external trees into git. Pass this flag to enable
externals tracking directly via git.
Versions of svn that do not support --ignore-externals are
automatically detected and this flag will be automatically
enabled for them.
Otherwise, do not enable this flag unless you know what you're
doing.
--no-stop-on-copy::
Only used with the 'fetch' command.
By default, git-svn passes --stop-on-copy to avoid dealing with
the copied/renamed branch directory problem entirely. A
copied/renamed branch is the result of a <SVN_URL> being created
in the past from a different source. These are problematic to
deal with even when working purely with svn if you work inside
subdirectories.
Do not use this flag unless you know exactly what you're getting
yourself into. You have been warned.
Examples
~~~~~~~~
Tracking and contributing to an Subversion managed-project:
# Initialize a tree (like git init-db)::
git-svn init http://svn.foo.org/project/trunk
# Fetch remote revisions::
git-svn fetch
# Create your own branch to hack on::
git checkout -b my-branch git-svn-HEAD
# Commit only the git commits you want to SVN::
git-svn commit <tree-ish> [<tree-ish_2> ...]
# Commit all the git commits from my-branch that don't exist in SVN::
git rev-list --pretty=oneline git-svn-HEAD..my-branch | git-svn commit
# Something is committed to SVN, pull the latest into your branch::
git-svn fetch && git pull . git-svn-HEAD
DESIGN PHILOSOPHY
-----------------
Merge tracking in Subversion is lacking and doing branched development
with Subversion is cumbersome as a result. git-svn completely forgoes
any automated merge/branch tracking on the Subversion side and leaves it
entirely up to the user on the git side. It's simply not worth it to do
a useful translation when the the original signal is weak.
TRACKING MULTIPLE REPOSITORIES OR BRANCHES
------------------------------------------
This is for advanced users, most users should ignore this section.
Because git-svn does not care about relationships between different
branches or directories in a Subversion repository, git-svn has a simple
hack to allow it to track an arbitrary number of related _or_ unrelated
SVN repositories via one git repository. Simply set the GIT_SVN_ID
environment variable to a name other other than "git-svn" (the default)
and git-svn will ignore the contents of the $GIT_DIR/git-svn directory
and instead do all of its work in $GIT_DIR/$GIT_SVN_ID for that
invocation.
ADDITIONAL FETCH ARGUMENTS
--------------------------
This is for advanced users, most users should ignore this section.
Unfetched SVN revisions may be imported as children of existing commits
by specifying additional arguments to 'fetch'. Additional parents may
optionally be specified in the form of sha1 hex sums at the
command-line. Unfetched SVN revisions may also be tied to particular
git commits with the following syntax:
svn_revision_number=git_commit_sha1
This allows you to tie unfetched SVN revision 375 to your current HEAD::
git-svn fetch 375=$(git-rev-parse HEAD)
BUGS
----
If somebody commits a conflicting changeset to SVN at a bad moment
(right before you commit) causing a conflict and your commit to fail,
your svn working tree ($GIT_DIR/git-svn/tree) may be dirtied. The
easiest thing to do is probably just to rm -rf $GIT_DIR/git-svn/tree and
run 'rebuild'.
We ignore all SVN properties except svn:executable. Too difficult to
map them since we rely heavily on git write-tree being _exactly_ the
same on both the SVN and git working trees and I prefer not to clutter
working trees with metadata files.
svn:keywords can't be ignored in Subversion (at least I don't know of
a way to ignore them).
Author
------
Written by Eric Wong <normalperson@yhbt.net>.
Documentation
-------------
Written by Eric Wong <normalperson@yhbt.net>.

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#! /usr/bin/env python
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
""" gitview
GUI browser for git repository
This program is based on bzrk by Scott James Remnant <scott@ubuntu.com>
"""
__copyright__ = "Copyright (C) 2006 Hewlett-Packard Development Company, L.P."
__author__ = "Aneesh Kumar K.V <aneesh.kumar@hp.com>"
import sys
import os
import gtk
import pygtk
import pango
import re
import time
import gobject
import cairo
import math
import string
try:
import gtksourceview
have_gtksourceview = True
except ImportError:
have_gtksourceview = False
print "Running without gtksourceview module"
re_ident = re.compile('(author|committer) (?P<ident>.*) (?P<epoch>\d+) (?P<tz>[+-]\d{4})')
def list_to_string(args, skip):
count = len(args)
i = skip
str_arg=" "
while (i < count ):
str_arg = str_arg + args[i]
str_arg = str_arg + " "
i = i+1
return str_arg
def show_date(epoch, tz):
secs = float(epoch)
tzsecs = float(tz[1:3]) * 3600
tzsecs += float(tz[3:5]) * 60
if (tz[0] == "+"):
secs += tzsecs
else:
secs -= tzsecs
return time.strftime("%Y-%m-%d %H:%M:%S", time.gmtime(secs))
def get_sha1_from_tags(line):
fp = os.popen("git cat-file -t " + line)
entry = string.strip(fp.readline())
fp.close()
if (entry == "commit"):
return line
elif (entry == "tag"):
fp = os.popen("git cat-file tag "+ line)
entry = string.strip(fp.readline())
fp.close()
obj = re.split(" ", entry)
if (obj[0] == "object"):
return obj[1]
return None
class CellRendererGraph(gtk.GenericCellRenderer):
"""Cell renderer for directed graph.
This module contains the implementation of a custom GtkCellRenderer that
draws part of the directed graph based on the lines suggested by the code
in graph.py.
Because we're shiny, we use Cairo to do this, and because we're naughty
we cheat and draw over the bits of the TreeViewColumn that are supposed to
just be for the background.
Properties:
node (column, colour, [ names ]) tuple to draw revision node,
in_lines (start, end, colour) tuple list to draw inward lines,
out_lines (start, end, colour) tuple list to draw outward lines.
"""
__gproperties__ = {
"node": ( gobject.TYPE_PYOBJECT, "node",
"revision node instruction",
gobject.PARAM_WRITABLE
),
"in-lines": ( gobject.TYPE_PYOBJECT, "in-lines",
"instructions to draw lines into the cell",
gobject.PARAM_WRITABLE
),
"out-lines": ( gobject.TYPE_PYOBJECT, "out-lines",
"instructions to draw lines out of the cell",
gobject.PARAM_WRITABLE
),
}
def do_set_property(self, property, value):
"""Set properties from GObject properties."""
if property.name == "node":
self.node = value
elif property.name == "in-lines":
self.in_lines = value
elif property.name == "out-lines":
self.out_lines = value
else:
raise AttributeError, "no such property: '%s'" % property.name
def box_size(self, widget):
"""Calculate box size based on widget's font.
Cache this as it's probably expensive to get. It ensures that we
draw the graph at least as large as the text.
"""
try:
return self._box_size
except AttributeError:
pango_ctx = widget.get_pango_context()
font_desc = widget.get_style().font_desc
metrics = pango_ctx.get_metrics(font_desc)
ascent = pango.PIXELS(metrics.get_ascent())
descent = pango.PIXELS(metrics.get_descent())
self._box_size = ascent + descent + 6
return self._box_size
def set_colour(self, ctx, colour, bg, fg):
"""Set the context source colour.
Picks a distinct colour based on an internal wheel; the bg
parameter provides the value that should be assigned to the 'zero'
colours and the fg parameter provides the multiplier that should be
applied to the foreground colours.
"""
colours = [
( 1.0, 0.0, 0.0 ),
( 1.0, 1.0, 0.0 ),
( 0.0, 1.0, 0.0 ),
( 0.0, 1.0, 1.0 ),
( 0.0, 0.0, 1.0 ),
( 1.0, 0.0, 1.0 ),
]
colour %= len(colours)
red = (colours[colour][0] * fg) or bg
green = (colours[colour][1] * fg) or bg
blue = (colours[colour][2] * fg) or bg
ctx.set_source_rgb(red, green, blue)
def on_get_size(self, widget, cell_area):
"""Return the size we need for this cell.
Each cell is drawn individually and is only as wide as it needs
to be, we let the TreeViewColumn take care of making them all
line up.
"""
box_size = self.box_size(widget)
cols = self.node[0]
for start, end, colour in self.in_lines + self.out_lines:
cols = max(cols, start, end)
(column, colour, names) = self.node
names_len = 0
if (len(names) != 0):
for item in names:
names_len += len(item)/3
width = box_size * (cols + 1 + names_len )
height = box_size
# FIXME I have no idea how to use cell_area properly
return (0, 0, width, height)
def on_render(self, window, widget, bg_area, cell_area, exp_area, flags):
"""Render an individual cell.
Draws the cell contents using cairo, taking care to clip what we
do to within the background area so we don't draw over other cells.
Note that we're a bit naughty there and should really be drawing
in the cell_area (or even the exposed area), but we explicitly don't
want any gutter.
We try and be a little clever, if the line we need to draw is going
to cross other columns we actually draw it as in the .---' style
instead of a pure diagonal ... this reduces confusion by an
incredible amount.
"""
ctx = window.cairo_create()
ctx.rectangle(bg_area.x, bg_area.y, bg_area.width, bg_area.height)
ctx.clip()
box_size = self.box_size(widget)
ctx.set_line_width(box_size / 8)
ctx.set_line_cap(cairo.LINE_CAP_SQUARE)
# Draw lines into the cell
for start, end, colour in self.in_lines:
ctx.move_to(cell_area.x + box_size * start + box_size / 2,
bg_area.y - bg_area.height / 2)
if start - end > 1:
ctx.line_to(cell_area.x + box_size * start, bg_area.y)
ctx.line_to(cell_area.x + box_size * end + box_size, bg_area.y)
elif start - end < -1:
ctx.line_to(cell_area.x + box_size * start + box_size,
bg_area.y)
ctx.line_to(cell_area.x + box_size * end, bg_area.y)
ctx.line_to(cell_area.x + box_size * end + box_size / 2,
bg_area.y + bg_area.height / 2)
self.set_colour(ctx, colour, 0.0, 0.65)
ctx.stroke()
# Draw lines out of the cell
for start, end, colour in self.out_lines:
ctx.move_to(cell_area.x + box_size * start + box_size / 2,
bg_area.y + bg_area.height / 2)
if start - end > 1:
ctx.line_to(cell_area.x + box_size * start,
bg_area.y + bg_area.height)
ctx.line_to(cell_area.x + box_size * end + box_size,
bg_area.y + bg_area.height)
elif start - end < -1:
ctx.line_to(cell_area.x + box_size * start + box_size,
bg_area.y + bg_area.height)
ctx.line_to(cell_area.x + box_size * end,
bg_area.y + bg_area.height)
ctx.line_to(cell_area.x + box_size * end + box_size / 2,
bg_area.y + bg_area.height / 2 + bg_area.height)
self.set_colour(ctx, colour, 0.0, 0.65)
ctx.stroke()
# Draw the revision node in the right column
(column, colour, names) = self.node
ctx.arc(cell_area.x + box_size * column + box_size / 2,
cell_area.y + cell_area.height / 2,
box_size / 4, 0, 2 * math.pi)
if (len(names) != 0):
name = " "
for item in names:
name = name + item + " "
ctx.text_path(name)
self.set_colour(ctx, colour, 0.0, 0.5)
ctx.stroke_preserve()
self.set_colour(ctx, colour, 0.5, 1.0)
ctx.fill()
class Commit:
""" This represent a commit object obtained after parsing the git-rev-list
output """
children_sha1 = {}
def __init__(self, commit_lines):
self.message = ""
self.author = ""
self.date = ""
self.committer = ""
self.commit_date = ""
self.commit_sha1 = ""
self.parent_sha1 = [ ]
self.parse_commit(commit_lines)
def parse_commit(self, commit_lines):
# First line is the sha1 lines
line = string.strip(commit_lines[0])
sha1 = re.split(" ", line)
self.commit_sha1 = sha1[0]
self.parent_sha1 = sha1[1:]
#build the child list
for parent_id in self.parent_sha1:
try:
Commit.children_sha1[parent_id].append(self.commit_sha1)
except KeyError:
Commit.children_sha1[parent_id] = [self.commit_sha1]
# IF we don't have parent
if (len(self.parent_sha1) == 0):
self.parent_sha1 = [0]
for line in commit_lines[1:]:
m = re.match("^ ", line)
if (m != None):
# First line of the commit message used for short log
if self.message == "":
self.message = string.strip(line)
continue
m = re.match("tree", line)
if (m != None):
continue
m = re.match("parent", line)
if (m != None):
continue
m = re_ident.match(line)
if (m != None):
date = show_date(m.group('epoch'), m.group('tz'))
if m.group(1) == "author":
self.author = m.group('ident')
self.date = date
elif m.group(1) == "committer":
self.committer = m.group('ident')
self.commit_date = date
continue
def get_message(self, with_diff=0):
if (with_diff == 1):
message = self.diff_tree()
else:
fp = os.popen("git cat-file commit " + self.commit_sha1)
message = fp.read()
fp.close()
return message
def diff_tree(self):
fp = os.popen("git diff-tree --pretty --cc -v -p --always " + self.commit_sha1)
diff = fp.read()
fp.close()
return diff
class DiffWindow:
"""Diff window.
This object represents and manages a single window containing the
differences between two revisions on a branch.
"""
def __init__(self):
self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
self.window.set_border_width(0)
self.window.set_title("Git repository browser diff window")
# Use two thirds of the screen by default
screen = self.window.get_screen()
monitor = screen.get_monitor_geometry(0)
width = int(monitor.width * 0.66)
height = int(monitor.height * 0.66)
self.window.set_default_size(width, height)
self.construct()
def construct(self):
"""Construct the window contents."""
vbox = gtk.VBox()
self.window.add(vbox)
vbox.show()
menu_bar = gtk.MenuBar()
save_menu = gtk.ImageMenuItem(gtk.STOCK_SAVE)
save_menu.connect("activate", self.save_menu_response, "save")
save_menu.show()
menu_bar.append(save_menu)
vbox.pack_start(menu_bar, False, False, 2)
menu_bar.show()
scrollwin = gtk.ScrolledWindow()
scrollwin.set_policy(gtk.POLICY_AUTOMATIC, gtk.POLICY_AUTOMATIC)
scrollwin.set_shadow_type(gtk.SHADOW_IN)
vbox.pack_start(scrollwin, expand=True, fill=True)
scrollwin.show()
if have_gtksourceview:
self.buffer = gtksourceview.SourceBuffer()
slm = gtksourceview.SourceLanguagesManager()
gsl = slm.get_language_from_mime_type("text/x-patch")
self.buffer.set_highlight(True)
self.buffer.set_language(gsl)
sourceview = gtksourceview.SourceView(self.buffer)
else:
self.buffer = gtk.TextBuffer()
sourceview = gtk.TextView(self.buffer)
sourceview.set_editable(False)
sourceview.modify_font(pango.FontDescription("Monospace"))
scrollwin.add(sourceview)
sourceview.show()
def set_diff(self, commit_sha1, parent_sha1):
"""Set the differences showed by this window.
Compares the two trees and populates the window with the
differences.
"""
# Diff with the first commit or the last commit shows nothing
if (commit_sha1 == 0 or parent_sha1 == 0 ):
return
fp = os.popen("git diff-tree -p " + parent_sha1 + " " + commit_sha1)
self.buffer.set_text(fp.read())
fp.close()
self.window.show()
def save_menu_response(self, widget, string):
dialog = gtk.FileChooserDialog("Save..", None, gtk.FILE_CHOOSER_ACTION_SAVE,
(gtk.STOCK_CANCEL, gtk.RESPONSE_CANCEL,
gtk.STOCK_SAVE, gtk.RESPONSE_OK))
dialog.set_default_response(gtk.RESPONSE_OK)
response = dialog.run()
if response == gtk.RESPONSE_OK:
patch_buffer = self.buffer.get_text(self.buffer.get_start_iter(),
self.buffer.get_end_iter())
fp = open(dialog.get_filename(), "w")
fp.write(patch_buffer)
fp.close()
dialog.destroy()
class GitView:
""" This is the main class
"""
version = "0.6"
def __init__(self, with_diff=0):
self.with_diff = with_diff
self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
self.window.set_border_width(0)
self.window.set_title("Git repository browser")
self.get_bt_sha1()
# Use three-quarters of the screen by default
screen = self.window.get_screen()
monitor = screen.get_monitor_geometry(0)
width = int(monitor.width * 0.75)
height = int(monitor.height * 0.75)
self.window.set_default_size(width, height)
# FIXME AndyFitz!
icon = self.window.render_icon(gtk.STOCK_INDEX, gtk.ICON_SIZE_BUTTON)
self.window.set_icon(icon)
self.accel_group = gtk.AccelGroup()
self.window.add_accel_group(self.accel_group)
self.construct()
def get_bt_sha1(self):
""" Update the bt_sha1 dictionary with the
respective sha1 details """
self.bt_sha1 = { }
git_dir = os.getenv("GIT_DIR")
if (git_dir == None):
git_dir = ".git"
#FIXME the path seperator
ref_files = os.listdir(git_dir + "/refs/tags")
for file in ref_files:
fp = open(git_dir + "/refs/tags/"+file)
sha1 = get_sha1_from_tags(string.strip(fp.readline()))
try:
self.bt_sha1[sha1].append(file)
except KeyError:
self.bt_sha1[sha1] = [file]
fp.close()
#FIXME the path seperator
ref_files = os.listdir(git_dir + "/refs/heads")
for file in ref_files:
fp = open(git_dir + "/refs/heads/" + file)
sha1 = get_sha1_from_tags(string.strip(fp.readline()))
try:
self.bt_sha1[sha1].append(file)
except KeyError:
self.bt_sha1[sha1] = [file]
fp.close()
def construct(self):
"""Construct the window contents."""
paned = gtk.VPaned()
paned.pack1(self.construct_top(), resize=False, shrink=True)
paned.pack2(self.construct_bottom(), resize=False, shrink=True)
self.window.add(paned)
paned.show()
def construct_top(self):
"""Construct the top-half of the window."""
vbox = gtk.VBox(spacing=6)
vbox.set_border_width(12)
vbox.show()
menu_bar = gtk.MenuBar()
menu_bar.set_pack_direction(gtk.PACK_DIRECTION_RTL)
help_menu = gtk.MenuItem("Help")
menu = gtk.Menu()
about_menu = gtk.MenuItem("About")
menu.append(about_menu)
about_menu.connect("activate", self.about_menu_response, "about")
about_menu.show()
help_menu.set_submenu(menu)
help_menu.show()
menu_bar.append(help_menu)
vbox.pack_start(menu_bar, False, False, 2)
menu_bar.show()
scrollwin = gtk.ScrolledWindow()
scrollwin.set_policy(gtk.POLICY_NEVER, gtk.POLICY_AUTOMATIC)
scrollwin.set_shadow_type(gtk.SHADOW_IN)
vbox.pack_start(scrollwin, expand=True, fill=True)
scrollwin.show()
self.treeview = gtk.TreeView()
self.treeview.set_rules_hint(True)
self.treeview.set_search_column(4)
self.treeview.connect("cursor-changed", self._treeview_cursor_cb)
scrollwin.add(self.treeview)
self.treeview.show()
cell = CellRendererGraph()
column = gtk.TreeViewColumn()
column.set_resizable(False)
column.pack_start(cell, expand=False)
column.add_attribute(cell, "node", 1)
column.add_attribute(cell, "in-lines", 2)
column.add_attribute(cell, "out-lines", 3)
self.treeview.append_column(column)
cell = gtk.CellRendererText()
cell.set_property("width-chars", 65)
cell.set_property("ellipsize", pango.ELLIPSIZE_END)
column = gtk.TreeViewColumn("Message")
column.set_resizable(True)
column.pack_start(cell, expand=True)
column.add_attribute(cell, "text", 4)
self.treeview.append_column(column)
cell = gtk.CellRendererText()
cell.set_property("width-chars", 40)
cell.set_property("ellipsize", pango.ELLIPSIZE_END)
column = gtk.TreeViewColumn("Author")
column.set_resizable(True)
column.pack_start(cell, expand=True)
column.add_attribute(cell, "text", 5)
self.treeview.append_column(column)
cell = gtk.CellRendererText()
cell.set_property("ellipsize", pango.ELLIPSIZE_END)
column = gtk.TreeViewColumn("Date")
column.set_resizable(True)
column.pack_start(cell, expand=True)
column.add_attribute(cell, "text", 6)
self.treeview.append_column(column)
return vbox
def about_menu_response(self, widget, string):
dialog = gtk.AboutDialog()
dialog.set_name("Gitview")
dialog.set_version(GitView.version)
dialog.set_authors(["Aneesh Kumar K.V <aneesh.kumar@hp.com>"])
dialog.set_website("http://www.kernel.org/pub/software/scm/git/")
dialog.set_copyright("Use and distribute under the terms of the GNU General Public License")
dialog.set_wrap_license(True)
dialog.run()
dialog.destroy()
def construct_bottom(self):
"""Construct the bottom half of the window."""
vbox = gtk.VBox(False, spacing=6)
vbox.set_border_width(12)
(width, height) = self.window.get_size()
vbox.set_size_request(width, int(height / 2.5))
vbox.show()
self.table = gtk.Table(rows=4, columns=4)
self.table.set_row_spacings(6)
self.table.set_col_spacings(6)
vbox.pack_start(self.table, expand=False, fill=True)
self.table.show()
align = gtk.Alignment(0.0, 0.5)
label = gtk.Label()
label.set_markup("<b>Revision:</b>")
align.add(label)
self.table.attach(align, 0, 1, 0, 1, gtk.FILL, gtk.FILL)
label.show()
align.show()
align = gtk.Alignment(0.0, 0.5)
self.revid_label = gtk.Label()
self.revid_label.set_selectable(True)
align.add(self.revid_label)
self.table.attach(align, 1, 2, 0, 1, gtk.EXPAND | gtk.FILL, gtk.FILL)
self.revid_label.show()
align.show()
align = gtk.Alignment(0.0, 0.5)
label = gtk.Label()
label.set_markup("<b>Committer:</b>")
align.add(label)
self.table.attach(align, 0, 1, 1, 2, gtk.FILL, gtk.FILL)
label.show()
align.show()
align = gtk.Alignment(0.0, 0.5)
self.committer_label = gtk.Label()
self.committer_label.set_selectable(True)
align.add(self.committer_label)
self.table.attach(align, 1, 2, 1, 2, gtk.EXPAND | gtk.FILL, gtk.FILL)
self.committer_label.show()
align.show()
align = gtk.Alignment(0.0, 0.5)
label = gtk.Label()
label.set_markup("<b>Timestamp:</b>")
align.add(label)
self.table.attach(align, 0, 1, 2, 3, gtk.FILL, gtk.FILL)
label.show()
align.show()
align = gtk.Alignment(0.0, 0.5)
self.timestamp_label = gtk.Label()
self.timestamp_label.set_selectable(True)
align.add(self.timestamp_label)
self.table.attach(align, 1, 2, 2, 3, gtk.EXPAND | gtk.FILL, gtk.FILL)
self.timestamp_label.show()
align.show()
align = gtk.Alignment(0.0, 0.5)
label = gtk.Label()
label.set_markup("<b>Parents:</b>")
align.add(label)
self.table.attach(align, 0, 1, 3, 4, gtk.FILL, gtk.FILL)
label.show()
align.show()
self.parents_widgets = []
align = gtk.Alignment(0.0, 0.5)
label = gtk.Label()
label.set_markup("<b>Children:</b>")
align.add(label)
self.table.attach(align, 2, 3, 3, 4, gtk.FILL, gtk.FILL)
label.show()
align.show()
self.children_widgets = []
scrollwin = gtk.ScrolledWindow()
scrollwin.set_policy(gtk.POLICY_AUTOMATIC, gtk.POLICY_AUTOMATIC)
scrollwin.set_shadow_type(gtk.SHADOW_IN)
vbox.pack_start(scrollwin, expand=True, fill=True)
scrollwin.show()
if have_gtksourceview:
self.message_buffer = gtksourceview.SourceBuffer()
slm = gtksourceview.SourceLanguagesManager()
gsl = slm.get_language_from_mime_type("text/x-patch")
self.message_buffer.set_highlight(True)
self.message_buffer.set_language(gsl)
sourceview = gtksourceview.SourceView(self.message_buffer)
else:
self.message_buffer = gtk.TextBuffer()
sourceview = gtk.TextView(self.message_buffer)
sourceview.set_editable(False)
sourceview.modify_font(pango.FontDescription("Monospace"))
scrollwin.add(sourceview)
sourceview.show()
return vbox
def _treeview_cursor_cb(self, *args):
"""Callback for when the treeview cursor changes."""
(path, col) = self.treeview.get_cursor()
commit = self.model[path][0]
if commit.committer is not None:
committer = commit.committer
timestamp = commit.commit_date
message = commit.get_message(self.with_diff)
revid_label = commit.commit_sha1
else:
committer = ""
timestamp = ""
message = ""
revid_label = ""
self.revid_label.set_text(revid_label)
self.committer_label.set_text(committer)
self.timestamp_label.set_text(timestamp)
self.message_buffer.set_text(message)
for widget in self.parents_widgets:
self.table.remove(widget)
self.parents_widgets = []
self.table.resize(4 + len(commit.parent_sha1) - 1, 4)
for idx, parent_id in enumerate(commit.parent_sha1):
self.table.set_row_spacing(idx + 3, 0)
align = gtk.Alignment(0.0, 0.0)
self.parents_widgets.append(align)
self.table.attach(align, 1, 2, idx + 3, idx + 4,
gtk.EXPAND | gtk.FILL, gtk.FILL)
align.show()
hbox = gtk.HBox(False, 0)
align.add(hbox)
hbox.show()
label = gtk.Label(parent_id)
label.set_selectable(True)
hbox.pack_start(label, expand=False, fill=True)
label.show()
image = gtk.Image()
image.set_from_stock(gtk.STOCK_JUMP_TO, gtk.ICON_SIZE_MENU)
image.show()
button = gtk.Button()
button.add(image)
button.set_relief(gtk.RELIEF_NONE)
button.connect("clicked", self._go_clicked_cb, parent_id)
hbox.pack_start(button, expand=False, fill=True)
button.show()
image = gtk.Image()
image.set_from_stock(gtk.STOCK_FIND, gtk.ICON_SIZE_MENU)
image.show()
button = gtk.Button()
button.add(image)
button.set_relief(gtk.RELIEF_NONE)
button.set_sensitive(True)
button.connect("clicked", self._show_clicked_cb,
commit.commit_sha1, parent_id)
hbox.pack_start(button, expand=False, fill=True)
button.show()
# Populate with child details
for widget in self.children_widgets:
self.table.remove(widget)
self.children_widgets = []
try:
child_sha1 = Commit.children_sha1[commit.commit_sha1]
except KeyError:
# We don't have child
child_sha1 = [ 0 ]
if ( len(child_sha1) > len(commit.parent_sha1)):
self.table.resize(4 + len(child_sha1) - 1, 4)
for idx, child_id in enumerate(child_sha1):
self.table.set_row_spacing(idx + 3, 0)
align = gtk.Alignment(0.0, 0.0)
self.children_widgets.append(align)
self.table.attach(align, 3, 4, idx + 3, idx + 4,
gtk.EXPAND | gtk.FILL, gtk.FILL)
align.show()
hbox = gtk.HBox(False, 0)
align.add(hbox)
hbox.show()
label = gtk.Label(child_id)
label.set_selectable(True)
hbox.pack_start(label, expand=False, fill=True)
label.show()
image = gtk.Image()
image.set_from_stock(gtk.STOCK_JUMP_TO, gtk.ICON_SIZE_MENU)
image.show()
button = gtk.Button()
button.add(image)
button.set_relief(gtk.RELIEF_NONE)
button.connect("clicked", self._go_clicked_cb, child_id)
hbox.pack_start(button, expand=False, fill=True)
button.show()
image = gtk.Image()
image.set_from_stock(gtk.STOCK_FIND, gtk.ICON_SIZE_MENU)
image.show()
button = gtk.Button()
button.add(image)
button.set_relief(gtk.RELIEF_NONE)
button.set_sensitive(True)
button.connect("clicked", self._show_clicked_cb,
child_id, commit.commit_sha1)
hbox.pack_start(button, expand=False, fill=True)
button.show()
def _destroy_cb(self, widget):
"""Callback for when a window we manage is destroyed."""
self.quit()
def quit(self):
"""Stop the GTK+ main loop."""
gtk.main_quit()
def run(self, args):
self.set_branch(args)
self.window.connect("destroy", self._destroy_cb)
self.window.show()
gtk.main()
def set_branch(self, args):
"""Fill in different windows with info from the reposiroty"""
fp = os.popen("git rev-parse --sq --default HEAD " + list_to_string(args, 1))
git_rev_list_cmd = fp.read()
fp.close()
fp = os.popen("git rev-list --header --topo-order --parents " + git_rev_list_cmd)
self.update_window(fp)
def update_window(self, fp):
commit_lines = []
self.model = gtk.ListStore(gobject.TYPE_PYOBJECT, gobject.TYPE_PYOBJECT,
gobject.TYPE_PYOBJECT, gobject.TYPE_PYOBJECT, str, str, str)
# used for cursor positioning
self.index = {}
self.colours = {}
self.nodepos = {}
self.incomplete_line = {}
index = 0
last_colour = 0
last_nodepos = -1
out_line = []
input_line = fp.readline()
while (input_line != ""):
# The commit header ends with '\0'
# This NULL is immediately followed by the sha1 of the
# next commit
if (input_line[0] != '\0'):
commit_lines.append(input_line)
input_line = fp.readline()
continue;
commit = Commit(commit_lines)
if (commit != None ):
(out_line, last_colour, last_nodepos) = self.draw_graph(commit,
index, out_line,
last_colour,
last_nodepos)
self.index[commit.commit_sha1] = index
index += 1
# Skip the '\0
commit_lines = []
commit_lines.append(input_line[1:])
input_line = fp.readline()
fp.close()
self.treeview.set_model(self.model)
self.treeview.show()
def draw_graph(self, commit, index, out_line, last_colour, last_nodepos):
in_line=[]
# | -> outline
# X
# |\ <- inline
# Reset nodepostion
if (last_nodepos > 5):
last_nodepos = 0
# Add the incomplete lines of the last cell in this
for sha1 in self.incomplete_line.keys():
if ( sha1 != commit.commit_sha1):
for pos in self.incomplete_line[sha1]:
in_line.append((pos, pos, self.colours[sha1]))
else:
del self.incomplete_line[sha1]
try:
colour = self.colours[commit.commit_sha1]
except KeyError:
last_colour +=1
self.colours[commit.commit_sha1] = last_colour
colour = last_colour
try:
node_pos = self.nodepos[commit.commit_sha1]
except KeyError:
last_nodepos +=1
self.nodepos[commit.commit_sha1] = last_nodepos
node_pos = last_nodepos
#The first parent always continue on the same line
try:
# check we alreay have the value
tmp_node_pos = self.nodepos[commit.parent_sha1[0]]
except KeyError:
self.colours[commit.parent_sha1[0]] = colour
self.nodepos[commit.parent_sha1[0]] = node_pos
in_line.append((node_pos, self.nodepos[commit.parent_sha1[0]],
self.colours[commit.parent_sha1[0]]))
self.add_incomplete_line(commit.parent_sha1[0], index+1)
if (len(commit.parent_sha1) > 1):
for parent_id in commit.parent_sha1[1:]:
try:
tmp_node_pos = self.nodepos[parent_id]
except KeyError:
last_colour += 1;
self.colours[parent_id] = last_colour
last_nodepos +=1
self.nodepos[parent_id] = last_nodepos
in_line.append((node_pos, self.nodepos[parent_id],
self.colours[parent_id]))
self.add_incomplete_line(parent_id, index+1)
try:
branch_tag = self.bt_sha1[commit.commit_sha1]
except KeyError:
branch_tag = [ ]
node = (node_pos, colour, branch_tag)
self.model.append([commit, node, out_line, in_line,
commit.message, commit.author, commit.date])
return (in_line, last_colour, last_nodepos)
def add_incomplete_line(self, sha1, index):
try:
self.incomplete_line[sha1].append(self.nodepos[sha1])
except KeyError:
self.incomplete_line[sha1] = [self.nodepos[sha1]]
def _go_clicked_cb(self, widget, revid):
"""Callback for when the go button for a parent is clicked."""
try:
self.treeview.set_cursor(self.index[revid])
except KeyError:
print "Revision %s not present in the list" % revid
# revid == 0 is the parent of the first commit
if (revid != 0 ):
print "Try running gitview without any options"
self.treeview.grab_focus()
def _show_clicked_cb(self, widget, commit_sha1, parent_sha1):
"""Callback for when the show button for a parent is clicked."""
window = DiffWindow()
window.set_diff(commit_sha1, parent_sha1)
self.treeview.grab_focus()
if __name__ == "__main__":
without_diff = 0
if (len(sys.argv) > 1 ):
if (sys.argv[1] == "--without-diff"):
without_diff = 1
view = GitView( without_diff != 1)
view.run(sys.argv[without_diff:])

View file

@ -3,17 +3,20 @@
# Copyright (c) 2005 Linus Torvalds
#
USAGE='[-a] [-d] [-l] [-n]'
USAGE='[-a] [-d] [-f] [-l] [-n] [-q]'
. git-sh-setup
no_update_info= all_into_one= remove_redundant= local=
no_update_info= all_into_one= remove_redundant=
local= quiet= no_reuse_delta=
while case "$#" in 0) break ;; esac
do
case "$1" in
-n) no_update_info=t ;;
-a) all_into_one=t ;;
-d) remove_redundant=t ;;
-l) local=t ;;
-q) quiet=-q ;;
-f) no_reuse_delta=--no-reuse-delta ;;
-l) local=--local ;;
*) usage ;;
esac
shift
@ -39,9 +42,7 @@ case ",$all_into_one," in
find . -type f \( -name '*.pack' -o -name '*.idx' \) -print`
;;
esac
if [ "$local" ]; then
pack_objects="$pack_objects --local"
fi
pack_objects="$pack_objects $local $quiet $no_reuse_delta"
name=$(git-rev-list --objects $rev_list $(git-rev-parse $rev_parse) 2>&1 |
git-pack-objects --non-empty $pack_objects .tmp-pack) ||
exit 1

View file

@ -7,7 +7,9 @@
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#ifndef NO_ICONV
#include <iconv.h>
#endif
#include "git-compat-util.h"
#include "cache.h"
@ -469,6 +471,7 @@ static int decode_b_segment(char *in, char *ot, char *ep)
static void convert_to_utf8(char *line, char *charset)
{
#ifndef NO_ICONV
char *in, *out;
size_t insize, outsize, nrc;
char outbuf[4096]; /* cheat */
@ -501,6 +504,7 @@ static void convert_to_utf8(char *line, char *charset)
return;
*out = 0;
strcpy(line, outbuf);
#endif
}
static void decode_header_bq(char *it)

View file

@ -5,21 +5,39 @@
#include "csum-file.h"
#include <sys/time.h>
static const char pack_usage[] = "git-pack-objects [-q] [--non-empty] [--local] [--incremental] [--window=N] [--depth=N] {--stdout | base-name} < object-list";
static const char pack_usage[] = "git-pack-objects [-q] [--no-reuse-delta] [--non-empty] [--local] [--incremental] [--window=N] [--depth=N] {--stdout | base-name} < object-list";
struct object_entry {
unsigned char sha1[20];
unsigned long size;
unsigned long offset;
unsigned int depth;
unsigned int hash;
unsigned long size; /* uncompressed size */
unsigned long offset; /* offset into the final pack file (nonzero if already written) */
unsigned int depth; /* delta depth */
unsigned int hash; /* name hint hash */
enum object_type type;
unsigned long delta_size;
struct object_entry *delta;
unsigned char edge; /* reused delta chain points at this entry. */
enum object_type in_pack_type; /* could be delta */
unsigned long delta_size; /* delta data size (uncompressed) */
struct object_entry *delta; /* delta base object */
struct packed_git *in_pack; /* already in pack */
unsigned int in_pack_offset;
};
/*
* Objects we are going to pack are colected in objects array (dynamically
* expanded). nr_objects & nr_alloc controls this array. They are stored
* in the order we see -- typically rev-list --objects order that gives us
* nice "minimum seek" order.
*
* sorted-by-sha ans sorted-by-type are arrays of pointers that point at
* elements in the objects array. The former is used to build the pack
* index (lists object names in the ascending order to help offset lookup),
* and the latter is used to group similar things together by try_delta()
* heuristics.
*/
static unsigned char object_list_sha1[20];
static int non_empty = 0;
static int no_reuse_delta = 0;
static int local = 0;
static int incremental = 0;
static struct object_entry **sorted_by_sha, **sorted_by_type;
@ -29,6 +47,137 @@ static const char *base_name;
static unsigned char pack_file_sha1[20];
static int progress = 1;
/*
* The object names in objects array are hashed with this hashtable,
* to help looking up the entry by object name. Binary search from
* sorted_by_sha is also possible but this was easier to code and faster.
* This hashtable is built after all the objects are seen.
*/
static int *object_ix = NULL;
static int object_ix_hashsz = 0;
/*
* Pack index for existing packs give us easy access to the offsets into
* corresponding pack file where each object's data starts, but the entries
* do not store the size of the compressed representation (uncompressed
* size is easily available by examining the pack entry header). We build
* a hashtable of existing packs (pack_revindex), and keep reverse index
* here -- pack index file is sorted by object name mapping to offset; this
* pack_revindex[].revindex array is an ordered list of offsets, so if you
* know the offset of an object, next offset is where its packed
* representation ends.
*/
struct pack_revindex {
struct packed_git *p;
unsigned long *revindex;
} *pack_revindex = NULL;
static int pack_revindex_hashsz = 0;
/*
* stats
*/
static int written = 0;
static int written_delta = 0;
static int reused = 0;
static int reused_delta = 0;
static int pack_revindex_ix(struct packed_git *p)
{
unsigned int ui = (unsigned int) p;
int i;
ui = ui ^ (ui >> 16); /* defeat structure alignment */
i = (int)(ui % pack_revindex_hashsz);
while (pack_revindex[i].p) {
if (pack_revindex[i].p == p)
return i;
if (++i == pack_revindex_hashsz)
i = 0;
}
return -1 - i;
}
static void prepare_pack_ix(void)
{
int num;
struct packed_git *p;
for (num = 0, p = packed_git; p; p = p->next)
num++;
if (!num)
return;
pack_revindex_hashsz = num * 11;
pack_revindex = xcalloc(sizeof(*pack_revindex), pack_revindex_hashsz);
for (p = packed_git; p; p = p->next) {
num = pack_revindex_ix(p);
num = - 1 - num;
pack_revindex[num].p = p;
}
/* revindex elements are lazily initialized */
}
static int cmp_offset(const void *a_, const void *b_)
{
unsigned long a = *(unsigned long *) a_;
unsigned long b = *(unsigned long *) b_;
if (a < b)
return -1;
else if (a == b)
return 0;
else
return 1;
}
/*
* Ordered list of offsets of objects in the pack.
*/
static void prepare_pack_revindex(struct pack_revindex *rix)
{
struct packed_git *p = rix->p;
int num_ent = num_packed_objects(p);
int i;
void *index = p->index_base + 256;
rix->revindex = xmalloc(sizeof(unsigned long) * (num_ent + 1));
for (i = 0; i < num_ent; i++) {
long hl = *((long *)(index + 24 * i));
rix->revindex[i] = ntohl(hl);
}
/* This knows the pack format -- the 20-byte trailer
* follows immediately after the last object data.
*/
rix->revindex[num_ent] = p->pack_size - 20;
qsort(rix->revindex, num_ent, sizeof(unsigned long), cmp_offset);
}
static unsigned long find_packed_object_size(struct packed_git *p,
unsigned long ofs)
{
int num;
int lo, hi;
struct pack_revindex *rix;
unsigned long *revindex;
num = pack_revindex_ix(p);
if (num < 0)
die("internal error: pack revindex uninitialized");
rix = &pack_revindex[num];
if (!rix->revindex)
prepare_pack_revindex(rix);
revindex = rix->revindex;
lo = 0;
hi = num_packed_objects(p) + 1;
do {
int mi = (lo + hi) / 2;
if (revindex[mi] == ofs) {
return revindex[mi+1] - ofs;
}
else if (ofs < revindex[mi])
hi = mi;
else
lo = mi + 1;
} while (lo < hi);
die("internal error: pack revindex corrupt");
}
static void *delta_against(void *buf, unsigned long size, struct object_entry *entry)
{
unsigned long othersize, delta_size;
@ -78,35 +227,69 @@ static unsigned long write_object(struct sha1file *f, struct object_entry *entry
{
unsigned long size;
char type[10];
void *buf = read_sha1_file(entry->sha1, type, &size);
void *buf;
unsigned char header[10];
unsigned hdrlen, datalen;
enum object_type obj_type;
int to_reuse = 0;
if (!buf)
die("unable to read %s", sha1_to_hex(entry->sha1));
if (size != entry->size)
die("object %s size inconsistency (%lu vs %lu)", sha1_to_hex(entry->sha1), size, entry->size);
/*
* The object header is a byte of 'type' followed by zero or
* more bytes of length. For deltas, the 20 bytes of delta sha1
* follows that.
*/
obj_type = entry->type;
if (entry->delta) {
buf = delta_against(buf, size, entry);
size = entry->delta_size;
obj_type = OBJ_DELTA;
if (! entry->in_pack)
to_reuse = 0; /* can't reuse what we don't have */
else if (obj_type == OBJ_DELTA)
to_reuse = 1; /* check_object() decided it for us */
else if (obj_type != entry->in_pack_type)
to_reuse = 0; /* pack has delta which is unusable */
else if (entry->delta)
to_reuse = 0; /* we want to pack afresh */
else
to_reuse = 1; /* we have it in-pack undeltified,
* and we do not need to deltify it.
*/
if (! to_reuse) {
buf = read_sha1_file(entry->sha1, type, &size);
if (!buf)
die("unable to read %s", sha1_to_hex(entry->sha1));
if (size != entry->size)
die("object %s size inconsistency (%lu vs %lu)",
sha1_to_hex(entry->sha1), size, entry->size);
if (entry->delta) {
buf = delta_against(buf, size, entry);
size = entry->delta_size;
obj_type = OBJ_DELTA;
}
/*
* The object header is a byte of 'type' followed by zero or
* more bytes of length. For deltas, the 20 bytes of delta
* sha1 follows that.
*/
hdrlen = encode_header(obj_type, size, header);
sha1write(f, header, hdrlen);
if (entry->delta) {
sha1write(f, entry->delta, 20);
hdrlen += 20;
}
datalen = sha1write_compressed(f, buf, size);
free(buf);
}
hdrlen = encode_header(obj_type, size, header);
sha1write(f, header, hdrlen);
if (entry->delta) {
sha1write(f, entry->delta, 20);
hdrlen += 20;
else {
struct packed_git *p = entry->in_pack;
use_packed_git(p);
datalen = find_packed_object_size(p, entry->in_pack_offset);
buf = p->pack_base + entry->in_pack_offset;
sha1write(f, buf, datalen);
unuse_packed_git(p);
hdrlen = 0; /* not really */
if (obj_type == OBJ_DELTA)
reused_delta++;
reused++;
}
datalen = sha1write_compressed(f, buf, size);
free(buf);
if (obj_type == OBJ_DELTA)
written_delta++;
written++;
return hdrlen + datalen;
}
@ -132,7 +315,6 @@ static void write_pack_file(void)
int i;
struct sha1file *f;
unsigned long offset;
unsigned long mb;
struct pack_header hdr;
if (!base_name)
@ -148,8 +330,6 @@ static void write_pack_file(void)
offset = write_one(f, objects + i, offset);
sha1close(f, pack_file_sha1, 1);
mb = offset >> 20;
offset &= 0xfffff;
}
static void write_index_file(void)
@ -196,18 +376,20 @@ static int add_object_entry(unsigned char *sha1, unsigned int hash)
{
unsigned int idx = nr_objects;
struct object_entry *entry;
struct packed_git *p;
unsigned int found_offset = 0;
struct packed_git *found_pack = NULL;
if (incremental || local) {
struct packed_git *p;
for (p = packed_git; p; p = p->next) {
struct pack_entry e;
if (find_pack_entry_one(sha1, &e, p)) {
if (incremental)
return 0;
if (local && !p->pack_local)
return 0;
for (p = packed_git; p; p = p->next) {
struct pack_entry e;
if (find_pack_entry_one(sha1, &e, p)) {
if (incremental)
return 0;
if (local && !p->pack_local)
return 0;
if (!found_pack) {
found_offset = e.offset;
found_pack = e.p;
}
}
}
@ -221,30 +403,114 @@ static int add_object_entry(unsigned char *sha1, unsigned int hash)
memset(entry, 0, sizeof(*entry));
memcpy(entry->sha1, sha1, 20);
entry->hash = hash;
if (found_pack) {
entry->in_pack = found_pack;
entry->in_pack_offset = found_offset;
}
nr_objects = idx+1;
return 1;
}
static int locate_object_entry_hash(unsigned char *sha1)
{
int i;
unsigned int ui;
memcpy(&ui, sha1, sizeof(unsigned int));
i = ui % object_ix_hashsz;
while (0 < object_ix[i]) {
if (!memcmp(sha1, objects[object_ix[i]-1].sha1, 20))
return i;
if (++i == object_ix_hashsz)
i = 0;
}
return -1 - i;
}
static struct object_entry *locate_object_entry(unsigned char *sha1)
{
int i = locate_object_entry_hash(sha1);
if (0 <= i)
return &objects[object_ix[i]-1];
return NULL;
}
static void check_object(struct object_entry *entry)
{
char type[20];
if (!sha1_object_info(entry->sha1, type, &entry->size)) {
if (!strcmp(type, "commit")) {
entry->type = OBJ_COMMIT;
} else if (!strcmp(type, "tree")) {
entry->type = OBJ_TREE;
} else if (!strcmp(type, "blob")) {
entry->type = OBJ_BLOB;
} else if (!strcmp(type, "tag")) {
entry->type = OBJ_TAG;
} else
die("unable to pack object %s of type %s",
sha1_to_hex(entry->sha1), type);
if (entry->in_pack) {
unsigned char base[20];
unsigned long size;
struct object_entry *base_entry;
/* We want in_pack_type even if we do not reuse delta.
* There is no point not reusing non-delta representations.
*/
check_reuse_pack_delta(entry->in_pack,
entry->in_pack_offset,
base, &size,
&entry->in_pack_type);
/* Check if it is delta, and the base is also an object
* we are going to pack. If so we will reuse the existing
* delta.
*/
if (!no_reuse_delta &&
entry->in_pack_type == OBJ_DELTA &&
(base_entry = locate_object_entry(base))) {
/* Depth value does not matter - find_deltas()
* will never consider reused delta as the
* base object to deltify other objects
* against, in order to avoid circular deltas.
*/
/* uncompressed size of the delta data */
entry->size = entry->delta_size = size;
entry->delta = base_entry;
entry->type = OBJ_DELTA;
base_entry->edge = 1;
return;
}
/* Otherwise we would do the usual */
}
else
if (sha1_object_info(entry->sha1, type, &entry->size))
die("unable to get type of object %s",
sha1_to_hex(entry->sha1));
if (!strcmp(type, "commit")) {
entry->type = OBJ_COMMIT;
} else if (!strcmp(type, "tree")) {
entry->type = OBJ_TREE;
} else if (!strcmp(type, "blob")) {
entry->type = OBJ_BLOB;
} else if (!strcmp(type, "tag")) {
entry->type = OBJ_TAG;
} else
die("unable to pack object %s of type %s",
sha1_to_hex(entry->sha1), type);
}
static void hash_objects(void)
{
int i;
struct object_entry *oe;
object_ix_hashsz = nr_objects * 2;
object_ix = xcalloc(sizeof(int), object_ix_hashsz);
for (i = 0, oe = objects; i < nr_objects; i++, oe++) {
int ix = locate_object_entry_hash(oe->sha1);
if (0 <= ix) {
error("the same object '%s' added twice",
sha1_to_hex(oe->sha1));
continue;
}
ix = -1 - ix;
object_ix[ix] = i + 1;
}
}
static void get_object_details(void)
@ -252,6 +518,8 @@ static void get_object_details(void)
int i;
struct object_entry *entry = objects;
hash_objects();
prepare_pack_ix();
for (i = 0; i < nr_objects; i++)
check_object(entry++);
}
@ -326,6 +594,13 @@ static int try_delta(struct unpacked *cur, struct unpacked *old, unsigned max_de
if (cur_entry->type != old_entry->type)
return -1;
/* If the current object is at edge, take the depth the objects
* that depend on the current object into account -- otherwise
* they would become too deep.
*/
if (cur_entry->edge)
max_depth /= 4;
size = cur_entry->size;
if (size < 50)
return -1;
@ -382,11 +657,19 @@ static void find_deltas(struct object_entry **list, int window, int depth)
eye_candy -= nr_objects / 20;
fputc('.', stderr);
}
if (entry->delta)
/* This happens if we decided to reuse existing
* delta from a pack. "!no_reuse_delta &&" is implied.
*/
continue;
free(n->data);
n->entry = entry;
n->data = read_sha1_file(entry->sha1, type, &size);
if (size != entry->size)
die("object %s inconsistent object length (%lu vs %lu)", sha1_to_hex(entry->sha1), size, entry->size);
j = window;
while (--j > 0) {
unsigned int other_idx = idx + j;
@ -411,10 +694,12 @@ static void find_deltas(struct object_entry **list, int window, int depth)
static void prepare_pack(int window, int depth)
{
get_object_details();
if (progress)
fprintf(stderr, "Packing %d objects", nr_objects);
get_object_details();
if (progress)
fputc('.', stderr);
sorted_by_type = create_sorted_list(type_size_sort);
if (window && depth)
find_deltas(sorted_by_type, window+1, depth);
@ -443,8 +728,9 @@ static int reuse_cached_pack(unsigned char *sha1, int pack_to_stdout)
}
}
fprintf(stderr, "Reusing %d objects pack %s\n", nr_objects,
sha1_to_hex(sha1));
if (progress)
fprintf(stderr, "Reusing %d objects pack %s\n", nr_objects,
sha1_to_hex(sha1));
if (pack_to_stdout) {
if (copy_fd(ifd, 1))
@ -524,6 +810,10 @@ int main(int argc, char **argv)
progress = 0;
continue;
}
if (!strcmp("--no-reuse-delta", arg)) {
no_reuse_delta = 1;
continue;
}
if (!strcmp("--stdout", arg)) {
pack_to_stdout = 1;
continue;
@ -599,5 +889,8 @@ int main(int argc, char **argv)
puts(sha1_to_hex(object_list_sha1));
}
}
if (progress)
fprintf(stderr, "Total %d, written %d (delta %d), reused %d (delta %d)\n",
nr_objects, written, written_delta, reused, reused_delta);
return 0;
}

4
pack.h
View file

@ -29,5 +29,7 @@ struct pack_header {
};
extern int verify_pack(struct packed_git *, int);
extern int check_reuse_pack_delta(struct packed_git *, unsigned long,
unsigned char *, unsigned long *,
enum object_type *);
#endif

View file

@ -826,6 +826,25 @@ static unsigned long unpack_object_header(struct packed_git *p, unsigned long of
return offset;
}
int check_reuse_pack_delta(struct packed_git *p, unsigned long offset,
unsigned char *base, unsigned long *sizep,
enum object_type *kindp)
{
unsigned long ptr;
int status = -1;
use_packed_git(p);
ptr = offset;
ptr = unpack_object_header(p, ptr, kindp, sizep);
if (*kindp != OBJ_DELTA)
goto done;
memcpy(base, p->pack_base + ptr, 20);
status = 0;
done:
unuse_packed_git(p);
return status;
}
void packed_object_info_detail(struct pack_entry *e,
char *type,
unsigned long *size,