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git-svn: introduce SVN version comparison function

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With double-digit version components in SVN::Core::VERSION,
a naive string comparison is no longer sufficient and
a numeric comparison is required for correct results.

This fixes a regression introduced in
commit 082afee621
("git-svn: use platform specific auth providers")
where SVN version "1.6.6" was incorrectly assumed to
be newer than the required "1.6.12" version.

[mk: fix namespace references]
[ew: commit message]

Tested-by: Matthijs Kooijman <matthijs@stdin.nl>
Acked-by: Eric Wong <normalperson@yhbt.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Junio C Hamano 2012-05-02 19:53:50 +00:00 committed by Eric Wong
parent 242cab3972
commit f760c903b8
1 changed files with 25 additions and 7 deletions
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32
git-svn.perl
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@ -41,11 +41,28 @@ sub fatal (@) { print STDERR "@_\n"; exit 1 }
# repository decides to close the connection which we expect to be kept alive.
$SIG{PIPE} = 'IGNORE';
# Given a dot separated version number, "subtract" it from
# the SVN::Core::VERSION; non-negaitive return means the SVN::Core
# is at least at the version the caller asked for.
sub compare_svn_version {
my (@ours) = split(/\./, $SVN::Core::VERSION);
my (@theirs) = split(/\./, $_[0]);
my ($i, $diff);
for ($i = 0; $i < @ours && $i < @theirs; $i++) {
$diff = $ours[$i] - $theirs[$i];
return $diff if ($diff);
}
return 1 if ($i < @ours);
return -1 if ($i < @theirs);
return 0;
}
sub _req_svn {
require SVN::Core; # use()-ing this causes segfaults for me... *shrug*
require SVN::Ra;
require SVN::Delta;
if ($SVN::Core::VERSION lt '1.1.0') {
if (::compare_svn_version('1.1.0') < 0) {
fatal "Need SVN::Core 1.1.0 or better (got $SVN::Core::VERSION)";
}
}
@ -1474,7 +1491,7 @@ sub cmd_info {
}
::_req_svn();
$result .= "Repository UUID: $uuid\n" unless $diff_status eq "A" &&
($SVN::Core::VERSION le '1.5.4' || $file_type ne "dir");
(::compare_svn_version('1.5.4') <= 0 || $file_type ne "dir");
$result .= "Revision: " . ($diff_status eq "A" ? 0 : $rev) . "\n";
$result .= "Node Kind: " .
@ -5464,7 +5481,7 @@ sub _auth_providers () {
# earlier 1.6.x versions would segfault, and <= 1.5.x didn't have
# this function
if ($SVN::Core::VERSION gt '1.6.12') {
if (::compare_svn_version('1.6.12') > 0) {
my $config = SVN::Core::config_get_config($config_dir);
my ($p, @a);
# config_get_config returns all config files from
@ -5623,7 +5640,7 @@ sub get_log {
# drop it. Therefore, the receiver callback passed to it
# is made aware of this limitation by being wrapped if
# the limit passed to is being wrapped.
if ($SVN::Core::VERSION le '1.2.0') {
if (::compare_svn_version('1.2.0') <= 0) {
my $limit = splice(@args, 3, 1);
if ($limit > 0) {
my $receiver = pop @args;
@ -5655,7 +5672,8 @@ sub trees_match {
sub get_commit_editor {
my ($self, $log, $cb, $pool) = @_;
my @lock = $SVN::Core::VERSION ge '1.2.0' ? (undef, 0) : ();
my @lock = (::compare_svn_version('1.2.0') >= 0) ? (undef, 0) : ();
$self->SUPER::get_commit_editor($log, $cb, @lock, $pool);
}
@ -5673,7 +5691,7 @@ sub gs_do_update {
my (@pc) = split m#/#, $path;
my $reporter = $self->do_update($rev_b, (@pc ? shift @pc : ''),
1, $editor, $pool);
my @lock = $SVN::Core::VERSION ge '1.2.0' ? (undef) : ();
my @lock = (::compare_svn_version('1.2.0') >= 0) ? (undef) : ();
# Since we can't rely on svn_ra_reparent being available, we'll
# just have to do some magic with set_path to make it so
@ -5723,7 +5741,7 @@ sub gs_do_switch {
$ra ||= $self;
$url_b = escape_url($url_b);
my $reporter = $ra->do_switch($rev_b, '', 1, $url_b, $editor, $pool);
my @lock = $SVN::Core::VERSION ge '1.2.0' ? (undef) : ();
my @lock = (::compare_svn_version('1.2.0') >= 0) ? (undef) : ();
$reporter->set_path('', $rev_a, 0, @lock, $pool);
$reporter->finish_report($pool);