git-svn: allow --log-window-size to be specified, default to 100

The newer default value should should lower memory usage for
large fetches and also help with fetching from less reliable
servers.  Previously the value was 1000 and memory usage
got a bit high on some repositories and fetching became
less reliable in some cases.

Signed-off-by: Eric Wong <normalperson@yhbt.net>

diff --git a/git-svn.perl b/git-svn.perl
index f4573ed102e935056752fac9a49901ac81b12dc9..8a80f81add22d6d10be6f59e6f0520be0e2306cf 100755 (executable)
--- a/git-svn.perl
+++ b/git-svn.perl
@@ -12,6 +12,7 @@ $VERSION = '@@GIT_VERSION@@';
 $ENV{GIT_DIR} ||= '.git';
 $Git::SVN::default_repo_id = 'svn';
 $Git::SVN::default_ref_id = $ENV{GIT_SVN_ID} || 'git-svn';
+$Git::SVN::Ra::_log_window_size = 100;
 
 $Git::SVN::Log::TZ = $ENV{TZ};
 $ENV{TZ} = 'UTC';
@@ -65,6 +66,7 @@ my %fc_opts = ( 'follow-parent|follow!' => \$Git::SVN::_follow_parent,
                'repack:i' => \$Git::SVN::_repack,
                'noMetadata' => \$Git::SVN::_no_metadata,
                'useSvmProps' => \$Git::SVN::_use_svm_props,
+               'log-window-size=i' => \$Git::SVN::Ra::_log_window_size,
                'quiet|q' => \$_q,
                'repack-flags|repack-args|repack-opts=s' =>
                   \$Git::SVN::_repack_flags,
@@ -2583,7 +2585,7 @@ sub apply_diff {
 }
 
 package Git::SVN::Ra;
-use vars qw/@ISA $config_dir/;
+use vars qw/@ISA $config_dir $_log_window_size/;
 use strict;
 use warnings;
 my ($can_do_switch);
@@ -2747,7 +2749,7 @@ sub gs_do_switch {
 sub gs_fetch_loop_common {
        my ($self, $base, $head, $gsv, $globs) = @_;
        return if ($base > $head);
-       my $inc = 1000;
+       my $inc = $_log_window_size;
        my ($min, $max) = ($base, $head < $base + $inc ? $head : $base + $inc);
        my %common;
        my $common_max = scalar @$gsv;
@@ -2954,6 +2956,9 @@ sub skip_unknown_revs {
        # 175007 - http(s):// (this repo required authorization, too...)
        #   More codes may be discovered later...
        if ($errno == 175007 || $errno == 175002 || $errno == 160013) {
+               warn "W: Ignoring error from SVN, path probably ",
+                    "does not exist: ($errno): ",
+                    $err->expanded_message,"\n";
                return;
        }
        die "Error from SVN, ($errno): ", $err->expanded_message,"\n";