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git/perl/Git/SVN.pm

2573 lines
71 KiB

package Git::SVN;
use strict;
use warnings $ENV{GIT_PERL_FATAL_WARNINGS} ? qw(FATAL all) : ();
use Fcntl qw/:DEFAULT :seek/;
use constant rev_map_fmt => 'NH*';
use vars qw/$_no_metadata
$_repack $_repack_flags $_use_svm_props $_head
$_use_svnsync_props $no_reuse_existing
$_use_log_author $_add_author_from $_localtime $_use_fsync/;
use Carp qw/croak/;
use File::Path qw/mkpath/;
use IPC::Open3;
use Memoize; # core since 5.8.0, Jul 2002
use POSIX qw(:signal_h);
use Time::Local;
use Git qw(
command
command_oneline
command_noisy
command_output_pipe
command_close_pipe
get_tz_offset
);
use Git::SVN::Utils qw(
fatal
can_compress
join_paths
canonicalize_path
canonicalize_url
add_path_to_url
);
my $memo_backend;
our $_follow_parent = 1;
our $_minimize_url = 'unset';
our $default_repo_id = 'svn';
our $default_ref_id = $ENV{GIT_SVN_ID} || 'git-svn';
my ($_gc_nr, $_gc_period);
# properties that we do not log:
my %SKIP_PROP;
BEGIN {
%SKIP_PROP = map { $_ => 1 } qw/svn:wc:ra_dav:version-url
svn:special svn:executable
svn:entry:committed-rev
svn:entry:last-author
svn:entry:uuid
svn:entry:committed-date/;
# some options are read globally, but can be overridden locally
# per [svn-remote "..."] section. Command-line options will *NOT*
# override options set in an [svn-remote "..."] section
no strict 'refs';
for my $option (qw/follow_parent no_metadata use_svm_props
use_svnsync_props/) {
my $key = $option;
$key =~ tr/_//d;
my $prop = "-$option";
*$option = sub {
my ($self) = @_;
return $self->{$prop} if exists $self->{$prop};
my $k = "svn-remote.$self->{repo_id}.$key";
eval { command_oneline(qw/config --get/, $k) };
if ($@) {
$self->{$prop} = ${"Git::SVN::_$option"};
} else {
my $v = command_oneline(qw/config --bool/,$k);
$self->{$prop} = $v eq 'false' ? 0 : 1;
}
return $self->{$prop};
}
}
}
my (%LOCKFILES, %INDEX_FILES);
END {
unlink keys %LOCKFILES if %LOCKFILES;
unlink keys %INDEX_FILES if %INDEX_FILES;
}
sub resolve_local_globs {
my ($url, $fetch, $glob_spec) = @_;
return unless defined $glob_spec;
my $ref = $glob_spec->{ref};
my $path = $glob_spec->{path};
foreach (command(qw#for-each-ref --format=%(refname) refs/#)) {
next unless m#^$ref->{regex}$#;
my $p = $1;
my $pathname = desanitize_refname($path->full_path($p));
my $refname = desanitize_refname($ref->full_path($p));
if (my $existing = $fetch->{$pathname}) {
if ($existing ne $refname) {
die "Refspec conflict:\n",
"existing: $existing\n",
" globbed: $refname\n";
}
my $u = (::cmt_metadata("$refname"))[0];
if (!defined($u)) {
warn
"W: $refname: no associated commit metadata from SVN, skipping\n";
next;
}
$u =~ s!^\Q$url\E(/|$)!! or die
"$refname: '$url' not found in '$u'\n";
if ($pathname ne $u) {
warn "W: Refspec glob conflict ",
"(ref: $refname):\n",
"expected path: $pathname\n",
" real path: $u\n",
"Continuing ahead with $u\n";
next;
}
} else {
$fetch->{$pathname} = $refname;
}
}
}
sub parse_revision_argument {
my ($base, $head) = @_;
if (!defined $::_revision || $::_revision eq 'BASE:HEAD') {
return ($base, $head);
}
return ($1, $2) if ($::_revision =~ /^(\d+):(\d+)$/);
return ($::_revision, $::_revision) if ($::_revision =~ /^\d+$/);
return ($head, $head) if ($::_revision eq 'HEAD');
return ($base, $1) if ($::_revision =~ /^BASE:(\d+)$/);
return ($1, $head) if ($::_revision =~ /^(\d+):HEAD$/);
die "revision argument: $::_revision not understood by git-svn\n";
}
sub fetch_all {
my ($repo_id, $remotes) = @_;
if (ref $repo_id) {
my $gs = $repo_id;
$repo_id = undef;
$repo_id = $gs->{repo_id};
}
$remotes ||= read_all_remotes();
my $remote = $remotes->{$repo_id} or
die "[svn-remote \"$repo_id\"] unknown\n";
my $fetch = $remote->{fetch};
my $url = $remote->{url} or die "svn-remote.$repo_id.url not defined\n";
my (@gs, @globs);
my $ra = Git::SVN::Ra->new($url);
my $uuid = $ra->get_uuid;
my $head = $ra->get_latest_revnum;
# ignore errors, $head revision may not even exist anymore
eval { $ra->get_log("", $head, 0, 1, 0, 1, sub { $head = $_[1] }) };
warn "W: $@\n" if $@;
my $base = defined $fetch ? $head : 0;
# read the max revs for wildcard expansion (branches/*, tags/*)
foreach my $t (qw/branches tags/) {
defined $remote->{$t} or next;
push @globs, @{$remote->{$t}};
my $max_rev = eval { tmp_config(qw/--int --get/,
"svn-remote.$repo_id.${t}-maxRev") };
if (defined $max_rev && ($max_rev < $base)) {
$base = $max_rev;
} elsif (!defined $max_rev) {
$base = 0;
}
}
if ($fetch) {
foreach my $p (sort keys %$fetch) {
my $gs = Git::SVN->new($fetch->{$p}, $repo_id, $p);
my $lr = $gs->rev_map_max;
if (defined $lr) {
$base = $lr if ($lr < $base);
}
push @gs, $gs;
}
}
($base, $head) = parse_revision_argument($base, $head);
$ra->gs_fetch_loop_common($base, $head, \@gs, \@globs);
}
sub read_all_remotes {
my $r = {};
my $use_svm_props = eval { command_oneline(qw/config --bool
svn.useSvmProps/) };
$use_svm_props = $use_svm_props eq 'true' if $use_svm_props;
my $svn_refspec = qr{\s*(.*?)\s*:\s*(.+?)\s*};
foreach (grep { s/^svn-remote\.// } command(qw/config -l/)) {
if (m!^(.+)\.fetch=$svn_refspec$!) {
my ($remote, $local_ref, $remote_ref) = ($1, $2, $3);
die("svn-remote.$remote: remote ref '$remote_ref' "
. "must start with 'refs/'\n")
unless $remote_ref =~ m{^refs/};
$local_ref = uri_decode($local_ref);
$r->{$remote}->{fetch}->{$local_ref} = $remote_ref;
$r->{$remote}->{svm} = {} if $use_svm_props;
} elsif (m!^(.+)\.usesvmprops=\s*(.*)\s*$!) {
$r->{$1}->{svm} = {};
} elsif (m!^(.+)\.url=\s*(.*)\s*$!) {
$r->{$1}->{url} = canonicalize_url($2);
} elsif (m!^(.+)\.pushurl=\s*(.*)\s*$!) {
$r->{$1}->{pushurl} = canonicalize_url($2);
} elsif (m!^(.+)\.ignore-refs=\s*(.*)\s*$!) {
$r->{$1}->{ignore_refs_regex} = $2;
} elsif (m!^(.+)\.(branches|tags)=$svn_refspec$!) {
my ($remote, $t, $local_ref, $remote_ref) =
($1, $2, $3, $4);
die("svn-remote.$remote: remote ref '$remote_ref' ($t) "
. "must start with 'refs/'\n")
unless $remote_ref =~ m{^refs/};
$local_ref = uri_decode($local_ref);
require Git::SVN::GlobSpec;
my $rs = {
t => $t,
remote => $remote,
path => Git::SVN::GlobSpec->new($local_ref, 1),
ref => Git::SVN::GlobSpec->new($remote_ref, 0) };
if (length($rs->{ref}->{right}) != 0) {
die "The '*' glob character must be the last ",
"character of '$remote_ref'\n";
}
push @{ $r->{$remote}->{$t} }, $rs;
}
}
map {
if (defined $r->{$_}->{svm}) {
my $svm;
eval {
my $section = "svn-remote.$_";
$svm = {
source => tmp_config('--get',
"$section.svm-source"),
replace => tmp_config('--get',
"$section.svm-replace"),
}
};
$r->{$_}->{svm} = $svm;
}
} keys %$r;
foreach my $remote (keys %$r) {
foreach ( grep { defined $_ }
map { $r->{$remote}->{$_} } qw(branches tags) ) {
foreach my $rs ( @$_ ) {
$rs->{ignore_refs_regex} =
$r->{$remote}->{ignore_refs_regex};
}
}
}
$r;
}
sub init_vars {
$_gc_nr = $_gc_period = 1000;
if (defined $_repack || defined $_repack_flags) {
warn "Repack options are obsolete; they have no effect.\n";
}
}
sub verify_remotes_sanity {
return unless -d $ENV{GIT_DIR};
my %seen;
foreach (command(qw/config -l/)) {
if (m!^svn-remote\.(?:.+)\.fetch=.*:refs/remotes/(\S+)\s*$!) {
if ($seen{$1}) {
die "Remote ref refs/remote/$1 is tracked by",
"\n \"$_\"\nand\n \"$seen{$1}\"\n",
"Please resolve this ambiguity in ",
"your git configuration file before ",
"continuing\n";
}
$seen{$1} = $_;
}
}
}
sub find_existing_remote {
my ($url, $remotes) = @_;
return undef if $no_reuse_existing;
my $existing;
foreach my $repo_id (keys %$remotes) {
my $u = $remotes->{$repo_id}->{url} or next;
next if $u ne $url;
$existing = $repo_id;
last;
}
$existing;
}
sub init_remote_config {
my ($self, $url, $no_write) = @_;
$url = canonicalize_url($url);
my $r = read_all_remotes();
my $existing = find_existing_remote($url, $r);
if ($existing) {
unless ($no_write) {
print STDERR "Using existing ",
"[svn-remote \"$existing\"]\n";
}
$self->{repo_id} = $existing;
} elsif ($_minimize_url) {
my $min_url = Git::SVN::Ra->new($url)->minimize_url;
$existing = find_existing_remote($min_url, $r);
if ($existing) {
unless ($no_write) {
print STDERR "Using existing ",
"[svn-remote \"$existing\"]\n";
}
$self->{repo_id} = $existing;
}
if ($min_url ne $url) {
unless ($no_write) {
print STDERR "Using higher level of URL: ",
"$url => $min_url\n";
}
my $old_path = $self->path;
$url =~ s!^\Q$min_url\E(/|$)!!;
$url = join_paths($url, $old_path);
$self->path($url);
$url = $min_url;
}
}
my $orig_url;
if (!$existing) {
# verify that we aren't overwriting anything:
$orig_url = eval {
command_oneline('config', '--get',
"svn-remote.$self->{repo_id}.url")
};
if ($orig_url && ($orig_url ne $url)) {
die "svn-remote.$self->{repo_id}.url already set: ",
"$orig_url\nwanted to set to: $url\n";
}
}
my ($xrepo_id, $xpath) = find_ref($self->refname);
if (!$no_write && defined $xpath) {
die "svn-remote.$xrepo_id.fetch already set to track ",
"$xpath:", $self->refname, "\n";
}
unless ($no_write) {
command_noisy('config',
"svn-remote.$self->{repo_id}.url", $url);
my $path = $self->path;
$path =~ s{^/}{};
$path =~ s{%([0-9A-F]{2})}{chr hex($1)}ieg;
$self->path($path);
command_noisy('config', '--add',
"svn-remote.$self->{repo_id}.fetch",
$self->path.":".$self->refname);
}
$self->url($url);
}
sub find_by_url { # repos_root and, path are optional
my ($class, $full_url, $repos_root, $path) = @_;
$full_url = canonicalize_url($full_url);
return undef unless defined $full_url;
remove_username($full_url);
remove_username($repos_root) if defined $repos_root;
my $remotes = read_all_remotes();
if (defined $full_url && defined $repos_root && !defined $path) {
$path = $full_url;
$path =~ s#^\Q$repos_root\E(?:/|$)##;
}
foreach my $repo_id (keys %$remotes) {
my $u = $remotes->{$repo_id}->{url} or next;
remove_username($u);
next if defined $repos_root && $repos_root ne $u;
my $fetch = $remotes->{$repo_id}->{fetch} || {};
foreach my $t (qw/branches tags/) {
foreach my $globspec (@{$remotes->{$repo_id}->{$t}}) {
resolve_local_globs($u, $fetch, $globspec);
}
}
my $p = $path;
my $rwr = rewrite_root({repo_id => $repo_id});
my $svm = $remotes->{$repo_id}->{svm}
if defined $remotes->{$repo_id}->{svm};
unless (defined $p) {
$p = $full_url;
my $z = $u;
my $prefix = '';
if ($rwr) {
$z = $rwr;
remove_username($z);
} elsif (defined $svm) {
$z = $svm->{source};
$prefix = $svm->{replace};
$prefix =~ s#^\Q$u\E(?:/|$)##;
$prefix =~ s#/$##;
}
$p =~ s#^\Q$z\E(?:/|$)#$prefix# or next;
}
# remote fetch paths are not URI escaped. Decode ours
# so they match
$p = uri_decode($p);
foreach my $f (keys %$fetch) {
next if $f ne $p;
return Git::SVN->new($fetch->{$f}, $repo_id, $f);
}
}
undef;
}
sub init {
my ($class, $url, $path, $repo_id, $ref_id, $no_write) = @_;
my $self = _new($class, $repo_id, $ref_id, $path);
if (defined $url) {
$self->init_remote_config($url, $no_write);
}
$self;
}
sub find_ref {
my ($ref_id) = @_;
foreach (command(qw/config -l/)) {
next unless m!^svn-remote\.(.+)\.fetch=
\s*(.*?)\s*:\s*(.+?)\s*$!x;
my ($repo_id, $path, $ref) = ($1, $2, $3);
if ($ref eq $ref_id) {
$path = '' if ($path =~ m#^\./?#);
return ($repo_id, $path);
}
}
(undef, undef, undef);
}
sub new {
my ($class, $ref_id, $repo_id, $path) = @_;
if (defined $ref_id && !defined $repo_id && !defined $path) {
($repo_id, $path) = find_ref($ref_id);
if (!defined $repo_id) {
die "Could not find a \"svn-remote.*.fetch\" key ",
"in the repository configuration matching: ",
"$ref_id\n";
}
}
my $self = _new($class, $repo_id, $ref_id, $path);
if (!defined $self->path || !length $self->path) {
my $fetch = command_oneline('config', '--get',
"svn-remote.$repo_id.fetch",
":$ref_id\$") or
die "Failed to read \"svn-remote.$repo_id.fetch\" ",
"\":$ref_id\$\" in config\n";
my($path) = split(/\s*:\s*/, $fetch);
$self->path($path);
}
{
my $path = $self->path;
$path =~ s{\A/}{};
$path =~ s{/\z}{};
$self->path($path);
}
my $url = command_oneline('config', '--get',
"svn-remote.$repo_id.url") or
die "Failed to read \"svn-remote.$repo_id.url\" in config\n";
$self->url($url);
$self->{pushurl} = eval { command_oneline('config', '--get',
"svn-remote.$repo_id.pushurl") };
$self->rebuild;
$self;
}
sub refname {
my ($refname) = $_[0]->{ref_id} ;
# It cannot end with a slash /, we'll throw up on this because
# SVN can't have directories with a slash in their name, either:
if ($refname =~ m{/$}) {
die "ref: '$refname' ends with a trailing slash; this is ",
"not permitted by git or Subversion\n";
}
# It cannot have ASCII control character space, tilde ~, caret ^,
# colon :, question-mark ?, asterisk *, space, or open bracket [
# anywhere.
#
# Additionally, % must be escaped because it is used for escaping
# and we want our escaped refname to be reversible
$refname =~ s{([ \%~\^:\?\*\[\t\\])}{sprintf('%%%02X',ord($1))}eg;
# no slash-separated component can begin with a dot .
# /.* becomes /%2E*
$refname =~ s{/\.}{/%2E}g;
# It cannot have two consecutive dots .. anywhere
# .. becomes %2E%2E
$refname =~ s{\.\.}{%2E%2E}g;
# trailing dots and .lock are not allowed
# .$ becomes %2E and .lock becomes %2Elock
$refname =~ s{\.(?=$|lock$)}{%2E};
# the sequence @{ is used to access the reflog
# @{ becomes %40{
$refname =~ s{\@\{}{%40\{}g;
return $refname;
}
sub desanitize_refname {
my ($refname) = @_;
$refname =~ s{%(?:([0-9A-F]{2}))}{chr hex($1)}eg;
return $refname;
}
sub svm_uuid {
my ($self) = @_;
return $self->{svm}->{uuid} if $self->svm;
$self->ra;
unless ($self->{svm}) {
die "SVM UUID not cached, and reading remotely failed\n";
}
$self->{svm}->{uuid};
}
sub svm {
my ($self) = @_;
return $self->{svm} if $self->{svm};
my $svm;
# see if we have it in our config, first:
eval {
my $section = "svn-remote.$self->{repo_id}";
$svm = {
source => tmp_config('--get', "$section.svm-source"),
uuid => tmp_config('--get', "$section.svm-uuid"),
replace => tmp_config('--get', "$section.svm-replace"),
}
};
if ($svm && $svm->{source} && $svm->{uuid} && $svm->{replace}) {
$self->{svm} = $svm;
}
$self->{svm};
}
sub _set_svm_vars {
my ($self, $ra) = @_;
return $ra if $self->svm;
my @err = ( "useSvmProps set, but failed to read SVM properties\n",
"(svm:source, svm:uuid) ",
"from the following URLs:\n" );
sub read_svm_props {
my ($self, $ra, $path, $r) = @_;
my $props = ($ra->get_dir($path, $r))[2];
my $src = $props->{'svm:source'};
my $uuid = $props->{'svm:uuid'};
return undef if (!$src || !$uuid);
chomp($src, $uuid);
$uuid =~ m{^[0-9a-f\-]{30,}$}i
or die "doesn't look right - svm:uuid is '$uuid'\n";
# the '!' is used to mark the repos_root!/relative/path
$src =~ s{/?!/?}{/};
$src =~ s{/+$}{}; # no trailing slashes please
# username is of no interest
$src =~ s{(^[a-z\+]*://)[^/@]*@}{$1};
my $replace = add_path_to_url($ra->url, $path);
my $section = "svn-remote.$self->{repo_id}";
tmp_config("$section.svm-source", $src);
tmp_config("$section.svm-replace", $replace);
tmp_config("$section.svm-uuid", $uuid);
$self->{svm} = {
source => $src,
uuid => $uuid,
replace => $replace
};
}
my $r = $ra->get_latest_revnum;
my $path = $self->path;
my %tried;
while (length $path) {
my $try = add_path_to_url($self->url, $path);
unless ($tried{$try}) {
return $ra if $self->read_svm_props($ra, $path, $r);
$tried{$try} = 1;
}
$path =~ s#/?[^/]+$##;
}
die "Path: '$path' should be ''\n" if $path ne '';
return $ra if $self->read_svm_props($ra, $path, $r);
$tried{ add_path_to_url($self->url, $path) } = 1;
if ($ra->{repos_root} eq $self->url) {
die @err, (map { " $_\n" } keys %tried), "\n";
}
# nope, make sure we're connected to the repository root:
my $ok;
my @tried_b;
$path = $ra->{svn_path};
$ra = Git::SVN::Ra->new($ra->{repos_root});
while (length $path) {
my $try = add_path_to_url($ra->url, $path);
unless ($tried{$try}) {
$ok = $self->read_svm_props($ra, $path, $r);
last if $ok;
$tried{$try} = 1;
}
$path =~ s#/?[^/]+$##;
}
die "Path: '$path' should be ''\n" if $path ne '';
$ok ||= $self->read_svm_props($ra, $path, $r);
$tried{ add_path_to_url($ra->url, $path) } = 1;
if (!$ok) {
die @err, (map { " $_\n" } keys %tried), "\n";
}
Git::SVN::Ra->new($self->url);
}
sub svnsync {
my ($self) = @_;
return $self->{svnsync} if $self->{svnsync};
if ($self->no_metadata) {
die "Can't have both 'noMetadata' and ",
"'useSvnsyncProps' options set!\n";
}
if ($self->rewrite_root) {
die "Can't have both 'useSvnsyncProps' and 'rewriteRoot' ",
"options set!\n";
}
if ($self->rewrite_uuid) {
die "Can't have both 'useSvnsyncProps' and 'rewriteUUID' ",
"options set!\n";
}
my $svnsync;
# see if we have it in our config, first:
eval {
my $section = "svn-remote.$self->{repo_id}";
my $url = tmp_config('--get', "$section.svnsync-url");
($url) = ($url =~ m{^([a-z\+]+://\S+)$}) or
die "doesn't look right - svn:sync-from-url is '$url'\n";
my $uuid = tmp_config('--get', "$section.svnsync-uuid");
($uuid) = ($uuid =~ m{^([0-9a-f\-]{30,})$}i) or
die "doesn't look right - svn:sync-from-uuid is '$uuid'\n";
$svnsync = { url => $url, uuid => $uuid }
};
if ($svnsync && $svnsync->{url} && $svnsync->{uuid}) {
return $self->{svnsync} = $svnsync;
}
my $err = "useSvnsyncProps set, but failed to read " .
"svnsync property: svn:sync-from-";
my $rp = $self->ra->rev_proplist(0);
my $url = $rp->{'svn:sync-from-url'} or die $err . "url\n";
($url) = ($url =~ m{^([a-z\+]+://\S+)$}) or
die "doesn't look right - svn:sync-from-url is '$url'\n";
my $uuid = $rp->{'svn:sync-from-uuid'} or die $err . "uuid\n";
($uuid) = ($uuid =~ m{^([0-9a-f\-]{30,})$}i) or
die "doesn't look right - svn:sync-from-uuid is '$uuid'\n";
my $section = "svn-remote.$self->{repo_id}";
tmp_config('--add', "$section.svnsync-uuid", $uuid);
tmp_config('--add', "$section.svnsync-url", $url);
return $self->{svnsync} = { url => $url, uuid => $uuid };
}
# this allows us to memoize our SVN::Ra UUID locally and avoid a
# remote lookup (useful for 'git svn log').
sub ra_uuid {
my ($self) = @_;
unless ($self->{ra_uuid}) {
my $key = "svn-remote.$self->{repo_id}.uuid";
my $uuid = eval { tmp_config('--get', $key) };
if (!$@ && $uuid && $uuid =~ /^([a-f\d\-]{30,})$/i) {
$self->{ra_uuid} = $uuid;
} else {
die "ra_uuid called without URL\n" unless $self->url;
$self->{ra_uuid} = $self->ra->get_uuid;
tmp_config('--add', $key, $self->{ra_uuid});
}
}
$self->{ra_uuid};
}
sub _set_repos_root {
my ($self, $repos_root) = @_;
my $k = "svn-remote.$self->{repo_id}.reposRoot";
$repos_root ||= $self->ra->{repos_root};
tmp_config($k, $repos_root);
$repos_root;
}
sub repos_root {
my ($self) = @_;
my $k = "svn-remote.$self->{repo_id}.reposRoot";
eval { tmp_config('--get', $k) } || $self->_set_repos_root;
}
sub ra {
my ($self) = shift;
my $ra = Git::SVN::Ra->new($self->url);
$self->_set_repos_root($ra->{repos_root});
if ($self->use_svm_props && !$self->{svm}) {
if ($self->no_metadata) {
die "Can't have both 'noMetadata' and ",
"'useSvmProps' options set!\n";
} elsif ($self->use_svnsync_props) {
die "Can't have both 'useSvnsyncProps' and ",
"'useSvmProps' options set!\n";
}
$ra = $self->_set_svm_vars($ra);
$self->{-want_revprops} = 1;
}
$ra;
}
# prop_walk(PATH, REV, SUB)
# -------------------------
# Recursively traverse PATH at revision REV and invoke SUB for each
# directory that contains a SVN property. SUB will be invoked as
# follows: &SUB(gs, path, props); where `gs' is this instance of
# Git::SVN, `path' the path to the directory where the properties
# `props' were found. The `path' will be relative to point of checkout,
# that is, if url://repo/trunk is the current Git branch, and that
# directory contains a sub-directory `d', SUB will be invoked with `/d/'
# as `path' (note the trailing `/').
sub prop_walk {
my ($self, $path, $rev, $sub) = @_;
$path =~ s#^/##;
my ($dirent, undef, $props) = $self->ra->get_dir($path, $rev);
$path =~ s#^/*#/#g;
my $p = $path;
# Strip the irrelevant part of the path.
$p =~ s#^/+\Q@{[$self->path]}\E(/|$)#/#;
# Ensure the path is terminated by a `/'.
$p =~ s#/*$#/#;
# The properties contain all the internal SVN stuff nobody
# (usually) cares about.
my $interesting_props = 0;
foreach (keys %{$props}) {
# If it doesn't start with `svn:', it must be a
# user-defined property.
++$interesting_props and next if $_ !~ /^svn:/;
# FIXME: Fragile, if SVN adds new public properties,
# this needs to be updated.
++$interesting_props if /^svn:(?:ignore|keywords|executable
|eol-style|mime-type
|externals|needs-lock)$/x;
}
&$sub($self, $p, $props) if $interesting_props;
foreach (sort keys %$dirent) {
next if $dirent->{$_}->{kind} != $SVN::Node::dir;
$self->prop_walk($self->path . $p . $_, $rev, $sub);
}
}
sub last_rev { ($_[0]->last_rev_commit)[0] }
sub last_commit { ($_[0]->last_rev_commit)[1] }
# returns the newest SVN revision number and newest commit SHA1
sub last_rev_commit {
my ($self) = @_;
if (defined $self->{last_rev} && defined $self->{last_commit}) {
return ($self->{last_rev}, $self->{last_commit});
}
my $c = ::verify_ref($self->refname.'^0');
if ($c && !$self->use_svm_props && !$self->no_metadata) {
my $rev = (::cmt_metadata($c))[1];
if (defined $rev) {
($self->{last_rev}, $self->{last_commit}) = ($rev, $c);
return ($rev, $c);
}
}
my $map_path = $self->map_path;
unless (-e $map_path) {
($self->{last_rev}, $self->{last_commit}) = (undef, undef);
return (undef, undef);
}
my ($rev, $commit) = $self->rev_map_max(1);
($self->{last_rev}, $self->{last_commit}) = ($rev, $commit);
return ($rev, $commit);
}
sub get_fetch_range {
my ($self, $min, $max) = @_;
$max ||= $self->ra->get_latest_revnum;
$min ||= $self->rev_map_max;
(++$min, $max);
}
sub svn_dir {
command_oneline(qw(rev-parse --git-path svn));
}
sub tmp_config {
my (@args) = @_;
my $svn_dir = svn_dir();
my $old_def_config = "$svn_dir/config";
my $config = "$svn_dir/.metadata";
if (! -f $config && -f $old_def_config) {
rename $old_def_config, $config or
die "Failed rename $old_def_config => $config: $!\n";
}
my $old_config = $ENV{GIT_CONFIG};
$ENV{GIT_CONFIG} = $config;
$@ = undef;
my @ret = eval {
unless (-f $config) {
mkfile($config);
open my $fh, '>', $config or
die "Can't open $config: $!\n";
print $fh "; This file is used internally by ",
"git-svn\n" or die
"Couldn't write to $config: $!\n";
print $fh "; You should not have to edit it\n" or
die "Couldn't write to $config: $!\n";
close $fh or die "Couldn't close $config: $!\n";
}
command('config', @args);
};
my $err = $@;
if (defined $old_config) {
$ENV{GIT_CONFIG} = $old_config;
} else {
delete $ENV{GIT_CONFIG};
}
die $err if $err;
wantarray ? @ret : $ret[0];
}
sub tmp_index_do {
my ($self, $sub) = @_;
my $old_index = $ENV{GIT_INDEX_FILE};
$ENV{GIT_INDEX_FILE} = $self->{index};
$@ = undef;
my @ret = eval {
my ($dir, $base) = ($self->{index} =~ m#^(.*?)/?([^/]+)$#);
mkpath([$dir]) unless -d $dir;
&$sub;
};
my $err = $@;
if (defined $old_index) {
$ENV{GIT_INDEX_FILE} = $old_index;
} else {
delete $ENV{GIT_INDEX_FILE};
}
die $err if $err;
wantarray ? @ret : $ret[0];
}
sub assert_index_clean {
my ($self, $treeish) = @_;
$self->tmp_index_do(sub {
command_noisy('read-tree', $treeish) unless -e $self->{index};
my $x = command_oneline('write-tree');
my ($y) = (command(qw/cat-file commit/, $treeish) =~
/^tree ($::oid)/mo);
return if $y eq $x;
warn "Index mismatch: $y != $x\nrereading $treeish\n";
unlink $self->{index} or die "unlink $self->{index}: $!\n";
command_noisy('read-tree', $treeish);
$x = command_oneline('write-tree');
if ($y ne $x) {
fatal "trees ($treeish) $y != $x\n",
"Something is seriously wrong...";
}
});
}
sub get_commit_parents {
my ($self, $log_entry) = @_;
my (%seen, @ret, @tmp);
# legacy support for 'set-tree'; this is only used by set_tree_cb:
if (my $ip = $self->{inject_parents}) {
if (my $commit = delete $ip->{$log_entry->{revision}}) {
push @tmp, $commit;
}
}
if (my $cur = ::verify_ref($self->refname.'^0')) {
push @tmp, $cur;
}
if (my $ipd = $self->{inject_parents_dcommit}) {
if (my $commit = delete $ipd->{$log_entry->{revision}}) {
push @tmp, @$commit;
}
}
push @tmp, $_ foreach (@{$log_entry->{parents}}, @tmp);
while (my $p = shift @tmp) {
next if $seen{$p};
$seen{$p} = 1;
push @ret, $p;
}
@ret;
}
sub rewrite_root {
my ($self) = @_;
return $self->{-rewrite_root} if exists $self->{-rewrite_root};
my $k = "svn-remote.$self->{repo_id}.rewriteRoot";
my $rwr = eval { command_oneline(qw/config --get/, $k) };
if ($rwr) {
$rwr =~ s#/+$##;
if ($rwr !~ m#^[a-z\+]+://#) {
die "$rwr is not a valid URL (key: $k)\n";
}
}
$self->{-rewrite_root} = $rwr;
}
sub rewrite_uuid {
my ($self) = @_;
return $self->{-rewrite_uuid} if exists $self->{-rewrite_uuid};
my $k = "svn-remote.$self->{repo_id}.rewriteUUID";
my $rwid = eval { command_oneline(qw/config --get/, $k) };
if ($rwid) {
$rwid =~ s#/+$##;
if ($rwid !~ m#^[a-f0-9]{8}-(?:[a-f0-9]{4}-){3}[a-f0-9]{12}$#) {
die "$rwid is not a valid UUID (key: $k)\n";
}
}
$self->{-rewrite_uuid} = $rwid;
}
sub metadata_url {
my ($self) = @_;
my $url = $self->rewrite_root || $self->url;
return canonicalize_url( add_path_to_url( $url, $self->path ) );
}
sub full_url {
my ($self) = @_;
return canonicalize_url( add_path_to_url( $self->url, $self->path ) );
}
sub full_pushurl {
my ($self) = @_;
if ($self->{pushurl}) {
return canonicalize_url( add_path_to_url( $self->{pushurl}, $self->path ) );
} else {
return $self->full_url;
}
}
sub set_commit_header_env {
my ($log_entry) = @_;
my %env;
foreach my $ned (qw/NAME EMAIL DATE/) {
foreach my $ac (qw/AUTHOR COMMITTER/) {
$env{"GIT_${ac}_${ned}"} = $ENV{"GIT_${ac}_${ned}"};
}
}
$ENV{GIT_AUTHOR_NAME} = $log_entry->{name};
$ENV{GIT_AUTHOR_EMAIL} = $log_entry->{email};
$ENV{GIT_AUTHOR_DATE} = $ENV{GIT_COMMITTER_DATE} = $log_entry->{date};
$ENV{GIT_COMMITTER_NAME} = (defined $log_entry->{commit_name})
? $log_entry->{commit_name}
: $log_entry->{name};
$ENV{GIT_COMMITTER_EMAIL} = (defined $log_entry->{commit_email})
? $log_entry->{commit_email}
: $log_entry->{email};
\%env;
}
sub restore_commit_header_env {
my ($env) = @_;
foreach my $ned (qw/NAME EMAIL DATE/) {
foreach my $ac (qw/AUTHOR COMMITTER/) {
my $k = "GIT_${ac}_${ned}";
if (defined $env->{$k}) {
$ENV{$k} = $env->{$k};
} else {
delete $ENV{$k};
}
}
}
}
sub gc {
command_noisy('gc', '--auto');
};
sub do_git_commit {
my ($self, $log_entry) = @_;
my $lr = $self->last_rev;
if (defined $lr && $lr >= $log_entry->{revision}) {
die "Last fetched revision of ", $self->refname,
" was r$lr, but we are about to fetch: ",
"r$log_entry->{revision}!\n";
}
if (my $c = $self->rev_map_get($log_entry->{revision})) {
croak "$log_entry->{revision} = $c already exists! ",
"Why are we refetching it?\n";
}
my $old_env = set_commit_header_env($log_entry);
my $tree = $log_entry->{tree};
if (!defined $tree) {
$tree = $self->tmp_index_do(sub {
command_oneline('write-tree') });
}
die "Tree is not a valid oid $tree\n" if $tree !~ /^$::oid$/o;
my @exec = ('git', 'commit-tree', $tree);
foreach ($self->get_commit_parents($log_entry)) {
push @exec, '-p', $_;
}
defined(my $pid = open3(my $msg_fh, my $out_fh, '>&STDERR', @exec))
or croak $!;
binmode $msg_fh;
# we always get UTF-8 from SVN, but we may want our commits in
# a different encoding.
if (my $enc = Git::config('i18n.commitencoding')) {
require Encode;
Encode::from_to($log_entry->{log}, 'UTF-8', $enc);
}
print $msg_fh $log_entry->{log} or croak $!;
restore_commit_header_env($old_env);
unless ($self->no_metadata) {
print $msg_fh "\ngit-svn-id: $log_entry->{metadata}\n"
or croak $!;
}
$msg_fh->flush == 0 or croak $!;
close $msg_fh or croak $!;
chomp(my $commit = do { local $/; <$out_fh> });
close $out_fh or croak $!;
waitpid $pid, 0;
croak $? if $?;
if ($commit !~ /^$::oid$/o) {
die "Failed to commit, invalid oid: $commit\n";
}
$self->rev_map_set($log_entry->{revision}, $commit, 1);
$self->{last_rev} = $log_entry->{revision};
$self->{last_commit} = $commit;
print "r$log_entry->{revision}" unless $::_q > 1;
if (defined $log_entry->{svm_revision}) {
print " (\@$log_entry->{svm_revision})" unless $::_q > 1;
$self->rev_map_set($log_entry->{svm_revision}, $commit,
0, $self->svm_uuid);
}
print " = $commit ($self->{ref_id})\n" unless $::_q > 1;
if (--$_gc_nr == 0) {
$_gc_nr = $_gc_period;
gc();
}
return $commit;
}
sub match_paths {
my ($self, $paths, $r) = @_;
return 1 if $self->path eq '';
if (my $path = $paths->{"/".$self->path}) {
return ($path->{action} eq 'D') ? 0 : 1;
}
$self->{path_regex} ||= qr{^/\Q@{[$self->path]}\E/};
if (grep /$self->{path_regex}/, keys %$paths) {
return 1;
}
my $c = '';
foreach (split m#/#, $self->path) {
$c .= "/$_";
next unless ($paths->{$c} &&
($paths->{$c}->{action} =~ /^[AR]$/));
if ($self->ra->check_path($self->path, $r) ==
$SVN::Node::dir) {
return 1;
}
}
return 0;
}
sub find_parent_branch {
my ($self, $paths, $rev) = @_;
return undef unless $self->follow_parent;
unless (defined $paths) {
my $err_handler = $SVN::Error::handler;
$SVN::Error::handler = \&Git::SVN::Ra::skip_unknown_revs;
$self->ra->get_log([$self->path], $rev, $rev, 0, 1, 1,
sub { $paths = $_[0] });
$SVN::Error::handler = $err_handler;
}
return undef unless defined $paths;
# look for a parent from another branch:
my @b_path_components = split m#/#, $self->path;
my @a_path_components;
my $i;
while (@b_path_components) {
$i = $paths->{'/'.join('/', @b_path_components)};
last if $i && defined $i->{copyfrom_path};
unshift(@a_path_components, pop(@b_path_components));
}
return undef unless defined $i && defined $i->{copyfrom_path};
my $branch_from = $i->{copyfrom_path};
if (@a_path_components) {
print STDERR "branch_from: $branch_from => ";
$branch_from .= '/'.join('/', @a_path_components);
print STDERR $branch_from, "\n";
}
my $r = $i->{copyfrom_rev};
my $repos_root = $self->ra->{repos_root};
my $url = $self->ra->url;
my $new_url = canonicalize_url( add_path_to_url( $url, $branch_from ) );
print STDERR "Found possible branch point: ",
"$new_url => ", $self->full_url, ", $r\n"
unless $::_q > 1;
$branch_from =~ s#^/##;
my $gs = $self->other_gs($new_url, $url,
$branch_from, $r, $self->{ref_id});
my ($r0, $parent) = $gs->find_rev_before($r, 1);
{
my ($base, $head);
if (!defined $r0 || !defined $parent) {
($base, $head) = parse_revision_argument(0, $r);
} else {
if ($r0 < $r) {
$gs->ra->get_log([$gs->path], $r0 + 1, $r, 1,
0, 1, sub { $base = $_[1] - 1 });
}
}
if (defined $base && $base <= $r) {
$gs->fetch($base, $r);
}
($r0, $parent) = $gs->find_rev_before($r, 1);
}
if (defined $r0 && defined $parent) {
print STDERR "Found branch parent: ($self->{ref_id}) $parent\n"
unless $::_q > 1;
my $ed;
if ($self->ra->can_do_switch) {
$self->assert_index_clean($parent);
print STDERR "Following parent with do_switch\n"
unless $::_q > 1;
# do_switch works with svn/trunk >= r22312, but that
# is not included with SVN 1.4.3 (the latest version
# at the moment), so we can't rely on it
$self->{last_rev} = $r0;
$self->{last_commit} = $parent;
$ed = Git::SVN::Fetcher->new($self, $gs->path);
$gs->ra->gs_do_switch($r0, $rev, $gs,
$self->full_url, $ed)
or die "SVN connection failed somewhere...\n";
} elsif ($self->ra->trees_match($new_url, $r0,
$self->full_url, $rev)) {
print STDERR "Trees match:\n",
" $new_url\@$r0\n",
" ${\$self->full_url}\@$rev\n",
"Following parent with no changes\n"
unless $::_q > 1;
$self->tmp_index_do(sub {
command_noisy('read-tree', $parent);
});
$self->{last_commit} = $parent;
} else {
print STDERR "Following parent with do_update\n"
unless $::_q > 1;
$ed = Git::SVN::Fetcher->new($self);
$self->ra->gs_do_update($rev, $rev, $self, $ed)
or die "SVN connection failed somewhere...\n";
}
print STDERR "Successfully followed parent\n" unless $::_q > 1;
return $self->make_log_entry($rev, [$parent], $ed, $r0, $branch_from);
}
return undef;
}
sub do_fetch {
my ($self, $paths, $rev) = @_;
my $ed;
my ($last_rev, @parents);
if (my $lc = $self->last_commit) {
# we can have a branch that was deleted, then re-added
# under the same name but copied from another path, in
# which case we'll have multiple parents (we don't
# want to break the original ref or lose copypath info):
if (my $log_entry = $self->find_parent_branch($paths, $rev)) {
push @{$log_entry->{parents}}, $lc;
return $log_entry;
}
$ed = Git::SVN::Fetcher->new($self);
$last_rev = $self->{last_rev};
$ed->{c} = $lc;
@parents = ($lc);
} else {
$last_rev = $rev;
if (my $log_entry = $self->find_parent_branch($paths, $rev)) {
return $log_entry;
}
$ed = Git::SVN::Fetcher->new($self);
}
unless ($self->ra->gs_do_update($last_rev, $rev, $self, $ed)) {
die "SVN connection failed somewhere...\n";
}
$self->make_log_entry($rev, \@parents, $ed, $last_rev, $self->path);
}
sub mkemptydirs {
my ($self, $r) = @_;
# add/remove/collect a paths table
#
# Paths are split into a tree of nodes, stored as a hash of hashes.
#
# Each node contains a 'path' entry for the path (if any) associated
# with that node and a 'children' entry for any nodes under that
# location.
#
# Removing a path requires a hash lookup for each component then
# dropping that node (and anything under it), which is substantially
# faster than a grep slice into a single hash of paths for large
# numbers of paths.
#
# For a large (200K) number of empty_dir directives this reduces
# scanning time to 3 seconds vs 10 minutes for grep+delete on a single
# hash of paths.
sub add_path {
my ($paths_table, $path) = @_;
my $node_ref;
foreach my $x (split('/', $path)) {
if (!exists($paths_table->{$x})) {
$paths_table->{$x} = { children => {} };
}
$node_ref = $paths_table->{$x};
$paths_table = $paths_table->{$x}->{children};
}
$node_ref->{path} = $path;
}
sub remove_path {
my ($paths_table, $path) = @_;
my $nodes_ref;
my $node_name;
foreach my $x (split('/', $path)) {
if (!exists($paths_table->{$x})) {
return;
}
$nodes_ref = $paths_table;
$node_name = $x;
$paths_table = $paths_table->{$x}->{children};
}
delete($nodes_ref->{$node_name});
}
sub collect_paths {
my ($paths_table, $paths_ref) = @_;
foreach my $v (values %$paths_table) {
my $p = $v->{path};
my $c = $v->{children};
collect_paths($c, $paths_ref);
if (defined($p)) {
push(@$paths_ref, $p);
}
}
}
sub scan {
my ($r, $paths_table, $line) = @_;
if (defined $r && $line =~ /^r(\d+)$/) {
return 0 if $1 > $r;
} elsif ($line =~ /^ \+empty_dir: (.+)$/) {
add_path($paths_table, $1);
} elsif ($line =~ /^ \-empty_dir: (.+)$/) {
remove_path($paths_table, $1);
}
1; # continue
};
my @empty_dirs;
my %paths_table;
my $gz_file = "$self->{dir}/unhandled.log.gz";
if (-f $gz_file) {
if (!can_compress()) {
warn "Compress::Zlib could not be found; ",
"empty directories in $gz_file will not be read\n";
} else {
my $gz = Compress::Zlib::gzopen($gz_file, "rb") or
die "Unable to open $gz_file: $!\n";
my $line;
while ($gz->gzreadline($line) > 0) {
scan($r, \%paths_table, $line) or last;
}
$gz->gzclose;
}
}
if (open my $fh, '<', "$self->{dir}/unhandled.log") {
binmode $fh or croak "binmode: $!";
while (<$fh>) {
scan($r, \%paths_table, $_) or last;
}
close $fh;
}
collect_paths(\%paths_table, \@empty_dirs);
my $strip = qr/\A\Q@{[$self->path]}\E(?:\/|$)/;
foreach my $d (sort @empty_dirs) {
$d = uri_decode($d);
$d =~ s/$strip//;
next unless length($d);
next if -d $d;
if (-e $d) {
warn "$d exists but is not a directory\n";
} else {
print "creating empty directory: $d\n";
mkpath([$d]);
}
}
}
sub get_untracked {
my ($self, $ed) = @_;
my @out;
my $h = $ed->{empty};
foreach (sort keys %$h) {
my $act = $h->{$_} ? '+empty_dir' : '-empty_dir';
push @out, " $act: " . uri_encode($_);
warn "W: $act: $_\n";
}
foreach my $t (qw/dir_prop file_prop/) {
$h = $ed->{$t} or next;
foreach my $path (sort keys %$h) {
my $ppath = $path eq '' ? '.' : $path;
foreach my $prop (sort keys %{$h->{$path}}) {
next if $SKIP_PROP{$prop};
my $v = $h->{$path}->{$prop};
my $t_ppath_prop = "$t: " .
uri_encode($ppath) . ' ' .
uri_encode($prop);
if (defined $v) {
push @out, " +$t_ppath_prop " .
uri_encode($v);
} else {
push @out, " -$t_ppath_prop";
}
}
}
}
foreach my $t (qw/absent_file absent_directory/) {
$h = $ed->{$t} or next;
foreach my $parent (sort keys %$h) {
foreach my $path (sort @{$h->{$parent}}) {
push @out, " $t: " .
uri_encode("$parent/$path");
warn "W: $t: $parent/$path ",
"Insufficient permissions?\n";
}
}
}
\@out;
}
# parse_svn_date(DATE)
# --------------------
# Given a date (in UTC) from Subversion, return a string in the format
# "<TZ Offset> <local date/time>" that Git will use.
#
# By default the parsed date will be in UTC; if $Git::SVN::_localtime
# is true we'll convert it to the local timezone instead.
sub parse_svn_date {
my $date = shift || return '+0000 1970-01-01 00:00:00';
my ($Y,$m,$d,$H,$M,$S) = ($date =~ /^(\d{4})\-(\d\d)\-(\d\d)T
(\d\d?)\:(\d\d)\:(\d\d)\.\d*Z$/x) or
croak "Unable to parse date: $date\n";
my $parsed_date; # Set next.
if ($Git::SVN::_localtime) {
# Translate the Subversion datetime to an epoch time.
# Begin by switching ourselves to $date's timezone, UTC.
my $old_env_TZ = $ENV{TZ};
$ENV{TZ} = 'UTC';
my $epoch_in_UTC =
Time::Local::timelocal($S, $M, $H, $d, $m - 1, $Y);
# Determine our local timezone (including DST) at the
# time of $epoch_in_UTC. $Git::SVN::Log::TZ stored the
# value of TZ, if any, at the time we were run.
if (defined $Git::SVN::Log::TZ) {
$ENV{TZ} = $Git::SVN::Log::TZ;
} else {
delete $ENV{TZ};
}
my $our_TZ = get_tz_offset($epoch_in_UTC);
# This converts $epoch_in_UTC into our local timezone.
my ($sec, $min, $hour, $mday, $mon, $year,
$wday, $yday, $isdst) = localtime($epoch_in_UTC);
$parsed_date = sprintf('%s %04d-%02d-%02d %02d:%02d:%02d',
$our_TZ, $year + 1900, $mon + 1,
$mday, $hour, $min, $sec);
# Reset us to the timezone in effect when we entered
# this routine.
if (defined $old_env_TZ) {
$ENV{TZ} = $old_env_TZ;
} else {
delete $ENV{TZ};
}
} else {
$parsed_date = "+0000 $Y-$m-$d $H:$M:$S";
}
return $parsed_date;
}
sub other_gs {
my ($self, $new_url, $url,
$branch_from, $r, $old_ref_id) = @_;
my $gs = Git::SVN->find_by_url($new_url, $url, $branch_from);
unless ($gs) {
my $ref_id = $old_ref_id;
$ref_id =~ s/\@\d+-*$//;
$ref_id .= "\@$r";
# just grow a tail if we're not unique enough :x
$ref_id .= '-' while find_ref($ref_id);
my ($u, $p, $repo_id) = ($new_url, '', $ref_id);
if ($u =~ s#^\Q$url\E(/|$)##) {
$p = $u;
$u = $url;
$repo_id = $self->{repo_id};
}
while (1) {
# It is possible to tag two different subdirectories at
# the same revision. If the url for an existing ref
# does not match, we must either find a ref with a
# matching url or create a new ref by growing a tail.
$gs = Git::SVN->init($u, $p, $repo_id, $ref_id, 1);
my (undef, $max_commit) = $gs->rev_map_max(1);
last if (!$max_commit);
my ($url) = ::cmt_metadata($max_commit);
last if ($url eq $gs->metadata_url);
$ref_id .= '-';
}
print STDERR "Initializing parent: $ref_id\n" unless $::_q > 1;
}
$gs
}
sub call_authors_prog {
my ($orig_author) = @_;
$orig_author = command_oneline('rev-parse', '--sq-quote', $orig_author);
my $author = `$::_authors_prog $orig_author`;
if ($? != 0) {
die "$::_authors_prog failed with exit code $?\n"
}
if ($author =~ /^\s*(.+?)\s*<(.*)>\s*$/) {
my ($name, $email) = ($1, $2);
return [$name, $email];
} else {
die "Author: $orig_author: $::_authors_prog returned "
. "invalid author format: $author\n";
}
}
sub check_author {
my ($author) = @_;
if (defined $author) {
$author =~ s/^\s+//g;
$author =~ s/\s+$//g;
}
if (!defined $author || length $author == 0) {
$author = '(no author)';
}
if (!defined $::users{$author}) {
if (defined $::_authors_prog) {
$::users{$author} = call_authors_prog($author);
} elsif (defined $::_authors) {
die "Author: $author not defined in $::_authors file\n";
}
}
$author;
}
sub find_extra_svk_parents {
my ($self, $tickets, $parents) = @_;
# aha! svk:merge property changed...
my @tickets = split "\n", $tickets;
my @known_parents;
for my $ticket ( @tickets ) {
my ($uuid, $path, $rev) = split /:/, $ticket;
if ( $uuid eq $self->ra_uuid ) {
my $repos_root = $self->url;
my $branch_from = $path;
$branch_from =~ s{^/}{};
my $gs = $self->other_gs(add_path_to_url( $repos_root, $branch_from ),
$repos_root,
$branch_from,
$rev,
$self->{ref_id});
if ( my $commit = $gs->rev_map_get($rev, $uuid) ) {
# wahey! we found it, but it might be
# an old one (!)
push @known_parents, [ $rev, $commit ];
}
}
}
# Ordering matters; highest-numbered commit merge tickets
# first, as they may account for later merge ticket additions
# or changes.
@known_parents = map {$_->[1]} sort {$b->[0] <=> $a->[0]} @known_parents;
for my $parent ( @known_parents ) {
my @cmd = ('rev-list', $parent, map { "^$_" } @$parents );
my ($msg_fh, $ctx) = command_output_pipe(@cmd);
my $new;
while ( <$msg_fh> ) {
$new=1;last;
}
command_close_pipe($msg_fh, $ctx);
if ( $new ) {
print STDERR
"Found merge parent (svk:merge ticket): $parent\n";
push @$parents, $parent;
}
}
}
sub lookup_svn_merge {
my $uuid = shift;
my $url = shift;
my $source = shift;
my $revs = shift;
my $path = $source;
$path =~ s{^/}{};
my $gs = Git::SVN->find_by_url($url.$source, $url, $path);
if ( !$gs ) {
warn "Couldn't find revmap for $url$source\n";
return;
}
my @ranges = split ",", $revs;
my ($tip, $tip_commit);
my @merged_commit_ranges;
# find the tip
for my $range ( @ranges ) {
if ($range =~ /[*]$/) {
warn "W: Ignoring partial merge in svn:mergeinfo "
."dirprop: $source:$range\n";
next;
}
my ($bottom, $top) = split "-", $range;
$top ||= $bottom;
my $bottom_commit = $gs->find_rev_after( $bottom, 1, $top );
my $top_commit = $gs->find_rev_before( $top, 1, $bottom );
unless ($top_commit and $bottom_commit) {
warn "W: unknown path/rev in svn:mergeinfo "
."dirprop: $source:$range\n";
next;
}
if (scalar(command('rev-parse', "$bottom_commit^@"))) {
push @merged_commit_ranges,
"$bottom_commit^..$top_commit";
} else {
push @merged_commit_ranges, "$top_commit";
}
if ( !defined $tip or $top > $tip ) {
$tip = $top;
$tip_commit = $top_commit;
}
}
return ($tip_commit, @merged_commit_ranges);
}
sub _rev_list {
my ($msg_fh, $ctx) = command_output_pipe(
"rev-list", @_,
);
my @rv;
while ( <$msg_fh> ) {
chomp;
push @rv, $_;
}
command_close_pipe($msg_fh, $ctx);
@rv;
}
sub check_cherry_pick2 {
my $base = shift;
my $tip = shift;
my $parents = shift;
my @ranges = @_;
my %commits = map { $_ => 1 }
_rev_list("--no-merges", $tip, "--not", $base, @$parents, "--");
for my $range ( @ranges ) {
delete @commits{_rev_list($range, "--")};
}
for my $commit (keys %commits) {
if (has_no_changes($commit)) {
delete $commits{$commit};
}
}
my @k = (keys %commits);
return (scalar @k, $k[0]);
}
sub has_no_changes {
my $commit = shift;
my @revs = split / /, command_oneline(
qw(rev-list --parents -1), $commit);
# Commits with no parents, e.g. the start of a partial branch,
# have changes by definition.
return 1 if (@revs < 2);
# Commits with multiple parents, e.g a merge, have no changes
# by definition.
return 0 if (@revs > 2);
return (command_oneline("rev-parse", "$commit^{tree}") eq
command_oneline("rev-parse", "$commit~1^{tree}"));
}
sub tie_for_persistent_memoization {
my $hash = shift;
my $path = shift;
unless ($memo_backend) {
if (eval { require Git::SVN::Memoize::YAML; 1}) {
$memo_backend = 1;
} else {
require Memoize::Storable;
$memo_backend = -1;
}
}
if ($memo_backend > 0) {
tie %$hash => 'Git::SVN::Memoize::YAML', "$path.yaml";
} else {
# first verify that any existing file can actually be loaded
# (it may have been saved by an incompatible version)
my $db = "$path.db";
if (-e $db) {
use Storable qw(retrieve);
if (!eval { retrieve($db); 1 }) {
unlink $db or die "unlink $db failed: $!";
}
}
tie %$hash => 'Memoize::Storable', $db, 'nstore';
}
}
# The GIT_DIR environment variable is not always set until after the command
# line arguments are processed, so we can't memoize in a BEGIN block.
{
my $memoized = 0;
sub memoize_svn_mergeinfo_functions {
return if $memoized;
$memoized = 1;
my $cache_path = svn_dir() . '/.caches/';
mkpath([$cache_path]) unless -d $cache_path;
my %lookup_svn_merge_cache;
my %check_cherry_pick2_cache;
my %has_no_changes_cache;
tie_for_persistent_memoization(\%lookup_svn_merge_cache,
"$cache_path/lookup_svn_merge");
memoize 'lookup_svn_merge',
SCALAR_CACHE => 'FAULT',
LIST_CACHE => ['HASH' => \%lookup_svn_merge_cache],
;
tie_for_persistent_memoization(\%check_cherry_pick2_cache,
"$cache_path/check_cherry_pick2");
memoize 'check_cherry_pick2',
SCALAR_CACHE => 'FAULT',
LIST_CACHE => ['HASH' => \%check_cherry_pick2_cache],
;
tie_for_persistent_memoization(\%has_no_changes_cache,
"$cache_path/has_no_changes");
memoize 'has_no_changes',
SCALAR_CACHE => ['HASH' => \%has_no_changes_cache],
LIST_CACHE => 'FAULT',
;
}
sub unmemoize_svn_mergeinfo_functions {
return if not $memoized;
$memoized = 0;
Memoize::unmemoize 'lookup_svn_merge';
Memoize::unmemoize 'check_cherry_pick2';
Memoize::unmemoize 'has_no_changes';
}
sub clear_memoized_mergeinfo_caches {
die "Only call this method in non-memoized context" if ($memoized);
my $cache_path = svn_dir() . '/.caches/';
return unless -d $cache_path;
for my $cache_file (("$cache_path/lookup_svn_merge",
"$cache_path/check_cherry_pick", # old
"$cache_path/check_cherry_pick2",
"$cache_path/has_no_changes")) {
for my $suffix (qw(yaml db)) {
my $file = "$cache_file.$suffix";
next unless -e $file;
unlink($file) or die "unlink($file) failed: $!\n";
}
}
}
Memoize::memoize 'Git::SVN::repos_root';
}
END {
# Force cache writeout explicitly instead of waiting for
# global destruction to avoid segfault in Storable:
# http://rt.cpan.org/Public/Bug/Display.html?id=36087
unmemoize_svn_mergeinfo_functions();
}
sub parents_exclude {
my $parents = shift;
my @commits = @_;
return unless @commits;
my @excluded;
my $excluded;
do {
my @cmd = ('rev-list', "-1", @commits, "--not", @$parents );
$excluded = command_oneline(@cmd);
if ( $excluded ) {
my @new;
my $found;
for my $commit ( @commits ) {
if ( $commit eq $excluded ) {
push @excluded, $commit;
$found++;
}
else {
push @new, $commit;
}
}
die "saw commit '$excluded' in rev-list output, "
."but we didn't ask for that commit (wanted: @commits --not @$parents)"
unless $found;
@commits = @new;
}
}
while ($excluded and @commits);
return @excluded;
}
# Compute what's new in svn:mergeinfo.
sub mergeinfo_changes {
my ($self, $old_path, $old_rev, $path, $rev, $mergeinfo_prop) = @_;
my %minfo = map {split ":", $_ } split "\n", $mergeinfo_prop;
my $old_minfo = {};
my $ra = $self->ra;
# Give up if $old_path isn't in the repo.
# This is probably a merge on a subtree.
if ($ra->check_path($old_path, $old_rev) != $SVN::Node::dir) {
warn "W: ignoring svn:mergeinfo on $old_path, ",
"directory didn't exist in r$old_rev\n";
return {};
}
my (undef, undef, $props) = $ra->get_dir($old_path, $old_rev);
if (defined $props->{"svn:mergeinfo"}) {
my %omi = map {split ":", $_ } split "\n",
$props->{"svn:mergeinfo"};
$old_minfo = \%omi;
}
my %changes = ();
foreach my $p (keys %minfo) {
my $a = $old_minfo->{$p} || "";
my $b = $minfo{$p};
# Omit merged branches whose ranges lists are unchanged.
next if $a eq $b;
# Remove any common range list prefix.
($a ^ $b) =~ /^[\0]*/;
my $common_prefix = rindex $b, ",", $+[0] - 1;
$changes{$p} = substr $b, $common_prefix + 1;
}
print STDERR "Checking svn:mergeinfo changes since r$old_rev: ",
scalar(keys %minfo), " sources, ",
scalar(keys %changes), " changed\n";
return \%changes;
}
# note: this function should only be called if the various dirprops
# have actually changed
sub find_extra_svn_parents {
my ($self, $mergeinfo, $parents) = @_;
# aha! svk:merge property changed...
memoize_svn_mergeinfo_functions();
# We first search for merged tips which are not in our
# history. Then, we figure out which git revisions are in
# that tip, but not this revision. If all of those revisions
# are now marked as merge, we can add the tip as a parent.
my @merges = sort keys %$mergeinfo;
my @merge_tips;
my $url = $self->url;
my $uuid = $self->ra_uuid;
my @all_ranges;
for my $merge ( @merges ) {
my ($tip_commit, @ranges) =
lookup_svn_merge( $uuid, $url,
$merge, $mergeinfo->{$merge} );
unless (!$tip_commit or
grep { $_ eq $tip_commit } @$parents ) {
push @merge_tips, $tip_commit;
push @all_ranges, @ranges;
} else {
push @merge_tips, undef;
}
}
my %excluded = map { $_ => 1 }
parents_exclude($parents, grep { defined } @merge_tips);
# check merge tips for new parents
my @new_parents;
for my $merge_tip ( @merge_tips ) {
my $merge = shift @merges;
next unless $merge_tip and $excluded{$merge_tip};
my $spec = "$merge:$mergeinfo->{$merge}";
# check out 'new' tips
my $merge_base;
eval {
$merge_base = command_oneline(
"merge-base",
@$parents, $merge_tip,
);
};
if ($@) {
die "An error occurred during merge-base"
unless $@->isa("Git::Error::Command");
warn "W: Cannot find common ancestor between ".
"@$parents and $merge_tip. Ignoring merge info.\n";
next;
}
# double check that there are no missing non-merge commits
my ($ninc, $ifirst) = check_cherry_pick2(
$merge_base, $merge_tip,
$parents,
@all_ranges,
);
if ($ninc) {
warn "W: svn cherry-pick ignored ($spec) - missing " .
"$ninc commit(s) (eg $ifirst)\n";
} else {
warn "Found merge parent ($spec): ", $merge_tip, "\n";
push @new_parents, $merge_tip;
}
}
# cater for merges which merge commits from multiple branches
if ( @new_parents > 1 ) {
for ( my $i = 0; $i <= $#new_parents; $i++ ) {
for ( my $j = 0; $j <= $#new_parents; $j++ ) {
next if $i == $j;
next unless $new_parents[$i];
next unless $new_parents[$j];
my $revs = command_oneline(
"rev-list", "-1",
"$new_parents[$i]..$new_parents[$j]",
);
if ( !$revs ) {
undef($new_parents[$j]);
}
}
}
}
push @$parents, grep { defined } @new_parents;
}
sub make_log_entry {
my ($self, $rev, $parents, $ed, $parent_rev, $parent_path) = @_;
my $untracked = $self->get_untracked($ed);
my @parents = @$parents;
my $props = $ed->{dir_prop}{$self->path};
if ($self->follow_parent) {
my $tickets = $props->{"svk:merge"};
if ($tickets) {
$self->find_extra_svk_parents($tickets, \@parents);
}
my $mergeinfo_prop = $props->{"svn:mergeinfo"};
if ($mergeinfo_prop) {
my $mi_changes = $self->mergeinfo_changes(
$parent_path,
$parent_rev,
$self->path,
$rev,
$mergeinfo_prop);
$self->find_extra_svn_parents($mi_changes, \@parents);
}
}
open my $un, '>>', "$self->{dir}/unhandled.log" or croak $!;
print $un "r$rev\n" or croak $!;
print $un $_, "\n" foreach @$untracked;
my %log_entry = ( parents => \@parents, revision => $rev,
log => '');
my $headrev;
my $logged = delete $self->{logged_rev_props};
if (!$logged || $self->{-want_revprops}) {
my $rp = $self->ra->rev_proplist($rev);
foreach (sort keys %$rp) {
my $v = $rp->{$_};
if (/^svn:(author|date|log)$/) {
$log_entry{$1} = $v;
} elsif ($_ eq 'svm:headrev') {
$headrev = $v;
} else {
print $un " rev_prop: ", uri_encode($_), ' ',
uri_encode($v), "\n";
}
}
} else {
map { $log_entry{$_} = $logged->{$_} } keys %$logged;
}
close $un or croak $!;
$log_entry{date} = parse_svn_date($log_entry{date});
$log_entry{log} .= "\n";
my $author = $log_entry{author} = check_author($log_entry{author});
my ($name, $email) = defined $::users{$author} ? @{$::users{$author}}
: ($author, undef);
my ($commit_name, $commit_email) = ($name, $email);
if ($_use_log_author) {
my $name_field;
if ($log_entry{log} =~ /From:\s+(.*\S)\s*\n/i) {
$name_field = $1;
} elsif ($log_entry{log} =~ /Signed-off-by:\s+(.*\S)\s*\n/i) {
$name_field = $1;
}
if (!defined $name_field) {
if (!defined $email) {
$email = $name;
}
} elsif ($name_field =~ /(.*?)\s+<(.*)>/) {
($name, $email) = ($1, $2);
} elsif ($name_field =~ /(.*)@/) {
($name, $email) = ($1, $name_field);
} else {
($name, $email) = ($name_field, $name_field);
}
}
if (defined $headrev && $self->use_svm_props) {
if ($self->rewrite_root) {
die "Can't have both 'useSvmProps' and 'rewriteRoot' ",
"options set!\n";
}
if ($self->rewrite_uuid) {
die "Can't have both 'useSvmProps' and 'rewriteUUID' ",
"options set!\n";
}
my ($uuid, $r) = $headrev =~ m{^([a-f\d\-]{30,}):(\d+)$}i;
# we don't want "SVM: initializing mirror for junk" ...
return undef if $r == 0;
my $svm = $self->svm;
if ($uuid ne $svm->{uuid}) {
die "UUID mismatch on SVM path:\n",
"expected: $svm->{uuid}\n",
" got: $uuid\n";
}
my $full_url = $self->full_url;
$full_url =~ s#^\Q$svm->{replace}\E(/|$)#$svm->{source}$1# or
die "Failed to replace '$svm->{replace}' with ",
"'$svm->{source}' in $full_url\n";
# throw away username for storing in records
remove_username($full_url);
$log_entry{metadata} = "$full_url\@$r $uuid";
$log_entry{svm_revision} = $r;
$email = "$author\@$uuid" unless defined $email;
$commit_email = "$author\@$uuid" unless defined $commit_email;
} elsif ($self->use_svnsync_props) {
my $full_url = canonicalize_url(
add_path_to_url( $self->svnsync->{url}, $self->path )
);
remove_username($full_url);
my $uuid = $self->svnsync->{uuid};
$log_entry{metadata} = "$full_url\@$rev $uuid";
$email = "$author\@$uuid" unless defined $email;
$commit_email = "$author\@$uuid" unless defined $commit_email;
} else {
my $url = $self->metadata_url;
remove_username($url);
my $uuid = $self->rewrite_uuid || $self->ra->get_uuid;
$log_entry{metadata} = "$url\@$rev " . $uuid;
$email = "$author\@$uuid" unless defined $email;
$commit_email = "$author\@$uuid" unless defined $commit_email;
}
$log_entry{name} = $name;
$log_entry{email} = $email;
$log_entry{commit_name} = $commit_name;
$log_entry{commit_email} = $commit_email;
\%log_entry;
}
sub fetch {
my ($self, $min_rev, $max_rev, @parents) = @_;
my ($last_rev, $last_commit) = $self->last_rev_commit;
my ($base, $head) = $self->get_fetch_range($min_rev, $max_rev);
$self->ra->gs_fetch_loop_common($base, $head, [$self]);
}
sub set_tree_cb {
my ($self, $log_entry, $tree, $rev, $date, $author) = @_;
$self->{inject_parents} = { $rev => $tree };
$self->fetch(undef, undef);
}
sub set_tree {
my ($self, $tree) = (shift, shift);
my $log_entry = ::get_commit_entry($tree);
unless ($self->{last_rev}) {
fatal("Must have an existing revision to commit");
}
my %ed_opts = ( r => $self->{last_rev},
log => $log_entry->{log},
ra => $self->ra,
tree_a => $self->{last_commit},
tree_b => $tree,
editor_cb => sub {
$self->set_tree_cb($log_entry, $tree, @_) },
svn_path => $self->path );
if (!Git::SVN::Editor->new(\%ed_opts)->apply_diff) {
print "No changes\nr$self->{last_rev} = $tree\n";
}
}
sub rebuild_from_rev_db {
my ($self, $path) = @_;
my $r = -1;
open my $fh, '<', $path or croak "open: $!";
binmode $fh or croak "binmode: $!";
while (<$fh>) {
length($_) == $::oid_length + 1 or croak "inconsistent size in ($_)";
chomp($_);
++$r;
next if $_ eq ('0' x $::oid_length);
$self->rev_map_set($r, $_);
print "r$r = $_\n";
}
close $fh or croak "close: $!";
unlink $path or croak "unlink: $!";
}
#define a global associate map to record rebuild status
my %rebuild_status;
#define a global associate map to record rebuild verify status
my %rebuild_verify_status;
sub rebuild {
my ($self) = @_;
my $map_path = $self->map_path;
my $partial = (-e $map_path && ! -z $map_path);
my $verify_key = $self->refname.'^0';
if (!$rebuild_verify_status{$verify_key}) {
my $verify_result = ::verify_ref($verify_key);
if ($verify_result) {
$rebuild_verify_status{$verify_key} = 1;
}
}
if (!$rebuild_verify_status{$verify_key}) {
return;
}
if (!$partial && ($self->use_svm_props || $self->no_metadata)) {
my $rev_db = $self->rev_db_path;
$self->rebuild_from_rev_db($rev_db);
if ($self->use_svm_props) {
my $svm_rev_db = $self->rev_db_path($self->svm_uuid);
$self->rebuild_from_rev_db($svm_rev_db);
}
$self->unlink_rev_db_symlink;
return;
}
print "Rebuilding $map_path ...\n" if (!$partial);
my ($base_rev, $head) = ($partial ? $self->rev_map_max_norebuild(1) :
(undef, undef));
my $key_value = ($head ? "$head.." : "") . $self->refname;
if (exists $rebuild_status{$key_value}) {
print "Done rebuilding $map_path\n" if (!$partial || !$head);
my $rev_db_path = $self->rev_db_path;
if (-f $self->rev_db_path) {
unlink $self->rev_db_path or croak "unlink: $!";
}
$self->unlink_rev_db_symlink;
return;
}
my ($log, $ctx) =
command_output_pipe(qw/rev-list --pretty=raw --reverse/,
$key_value,
'--');
$rebuild_status{$key_value} = 1;
my $metadata_url = $self->metadata_url;
remove_username($metadata_url);
my $svn_uuid = $self->rewrite_uuid || $self->ra_uuid;
my $c;
while (<$log>) {
if ( m{^commit ($::oid)$} ) {
$c = $1;
next;
}
next unless s{^\s*(git-svn-id:)}{$1};
my ($url, $rev, $uuid) = ::extract_metadata($_);
remove_username($url);
# ignore merges (from set-tree)
next if (!defined $rev || !$uuid);
# if we merged or otherwise started elsewhere, this is
# how we break out of it
if (($uuid ne $svn_uuid) ||
($metadata_url && $url && ($url ne $metadata_url))) {
next;
}
if ($partial && $head) {
print "Partial-rebuilding $map_path ...\n";
print "Currently at $base_rev = $head\n";
$head = undef;
}
$self->rev_map_set($rev, $c);
print "r$rev = $c\n";
}
command_close_pipe($log, $ctx);
print "Done rebuilding $map_path\n" if (!$partial || !$head);
my $rev_db_path = $self->rev_db_path;
if (-f $self->rev_db_path) {
unlink $self->rev_db_path or croak "unlink: $!";
}
$self->unlink_rev_db_symlink;
}
# rev_map:
# Tie::File seems to be prone to offset errors if revisions get sparse,
# it's not that fast, either. Tie::File is also not in Perl 5.6. So
# one of my favorite modules is out :< Next up would be one of the DBM
# modules, but I'm not sure which is most portable...
#
# This is the replacement for the rev_db format, which was too big
# and inefficient for large repositories with a lot of sparse history
# (mainly tags)
#
# The format is this:
# - 24 or 36 bytes for every record,
# * 4 bytes for the integer representing an SVN revision number
# * 20 or 32 bytes representing the oid of a git commit
# - No empty padding records like the old format
# (except the last record, which can be overwritten)
# - new records are written append-only since SVN revision numbers
# increase monotonically
# - lookups on SVN revision number are done via a binary search
# - Piping the file to xxd -c24 is a good way of dumping it for
# viewing or editing (piped back through xxd -r), should the need
# ever arise.
# - The last record can be padding revision with an all-zero oid
# This is used to optimize fetch performance when using multiple
# "fetch" directives in .git/config
#
# These files are disposable unless noMetadata or useSvmProps is set
sub _rev_map_set {
my ($fh, $rev, $commit) = @_;
my $record_size = ($::oid_length / 2) + 4;
binmode $fh or croak "binmode: $!";
my $size = (stat($fh))[7];
($size % $record_size) == 0 or croak "inconsistent size: $size";
my $wr_offset = 0;
if ($size > 0) {
sysseek($fh, -$record_size, SEEK_END) or croak "seek: $!";
my $read = sysread($fh, my $buf, $record_size) or croak "read: $!";
$read == $record_size or croak "read only $read bytes (!= $record_size)";
my ($last_rev, $last_commit) = unpack(rev_map_fmt, $buf);
if ($last_commit eq ('0' x $::oid_length)) {
if ($size >= ($record_size * 2)) {
sysseek($fh, -($record_size * 2), SEEK_END) or croak "seek: $!";
$read = sysread($fh, $buf, $record_size) or
croak "read: $!";
$read == $record_size or
croak "read only $read bytes (!= $record_size)";
($last_rev, $last_commit) =
unpack(rev_map_fmt, $buf);
if ($last_commit eq ('0' x $::oid_length)) {
croak "inconsistent .rev_map\n";
}
}
if ($last_rev >= $rev) {
croak "last_rev is higher!: $last_rev >= $rev";
}
$wr_offset = -$record_size;
}
}
sysseek($fh, $wr_offset, SEEK_END) or croak "seek: $!";
syswrite($fh, pack(rev_map_fmt, $rev, $commit), $record_size) == $record_size or
croak "write: $!";
}
sub _rev_map_reset {
my ($fh, $rev, $commit) = @_;
my $c = _rev_map_get($fh, $rev);
$c eq $commit or die "_rev_map_reset(@_) commit $c does not match!\n";
my $offset = sysseek($fh, 0, SEEK_CUR) or croak "seek: $!";
truncate $fh, $offset or croak "truncate: $!";
}
sub mkfile {
my ($path) = @_;
unless (-e $path) {
my ($dir, $base) = ($path =~ m#^(.*?)/?([^/]+)$#);
mkpath([$dir]) unless -d $dir;
open my $fh, '>>', $path or die "Couldn't create $path: $!\n";
close $fh or die "Couldn't close (create) $path: $!\n";
}
}
# TODO: move this to Git.pm?
sub use_fsync {
if (!defined($_use_fsync)) {
my $x = $ENV{GIT_TEST_FSYNC};
if (defined $x) {
my $v = command_oneline('-c', "test.fsync=$x",
qw(config --type=bool test.fsync));
$_use_fsync = defined($v) ? ($v eq "true\n") : 1;
}
}
$_use_fsync;
}
sub rev_map_set {
my ($self, $rev, $commit, $update_ref, $uuid) = @_;
defined $commit or die "missing arg3\n";
$commit =~ /^$::oid$/ or die "arg3 must be a full hex object ID\n";
my $db = $self->map_path($uuid);
my $db_lock = "$db.lock";
my $sigmask;
$update_ref ||= 0;
if ($update_ref) {
$sigmask = POSIX::SigSet->new();
my $signew = POSIX::SigSet->new(SIGINT, SIGHUP, SIGTERM,
SIGALRM, SIGUSR1, SIGUSR2);
sigprocmask(SIG_BLOCK, $signew, $sigmask) or
croak "Can't block signals: $!";
}
mkfile($db);
$LOCKFILES{$db_lock} = 1;
my $sync;
# both of these options make our .rev_db file very, very important
# and we can't afford to lose it because rebuild() won't work
if (($self->use_svm_props || $self->no_metadata) && use_fsync()) {
require File::Copy;
$sync = 1;
File::Copy::copy($db, $db_lock) or die "rev_map_set(@_): ",
"Failed to copy: ",
"$db => $db_lock ($!)\n";
} else {
rename $db