git-svnimport: support for incremental import

This adds ability to do import "in chunks" (default 1000 revisions),
after each chunk git repo will be repacked. The option -R is used to
change default value of chunk size (or how often repository will
repacked).

Signed-off-by: Sasha Khapyorsky <sashak@voltaire.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/Documentation/git-svnimport.txt b/Documentation/git-svnimport.txt
index 2c7c7dad54b5d2c773194b494d98ea521bc54d2f..b166cf3327380a8f386825a7fbce92f2447bb54e 100644 (file)
--- a/Documentation/git-svnimport.txt
+++ b/Documentation/git-svnimport.txt
@@ -15,7 +15,7 @@ SYNOPSIS
                [ -b branch_subdir ] [ -T trunk_subdir ] [ -t tag_subdir ]
                [ -s start_chg ] [ -m ] [ -r ] [ -M regex ]
                [ -I <ignorefile_name> ] [ -A <author_file> ]
-               [ -P <path_from_trunk> ]
+               [ -R <repack_each_revs>] [ -P <path_from_trunk> ]
                <SVN_repository_URL> [ <path> ]
 
 
@@ -108,6 +108,14 @@ repository without -A.
 Formerly, this option controlled how many revisions to pull,
 due to SVN memory leaks. (These have been worked around.)
 
+-R <repack_each_revs>::
+       Specify how often git repository should be repacked.
++
+The default value is 1000. git-svnimport will do import in chunks of 1000
+revisions, after each chunk git repository will be repacked. To disable
+this behavior specify some big value here which is mote than number of
+revisions to import.
+
 -P <path_from_trunk>::
        Partial import of the SVN tree.
 +

diff --git a/git-svnimport.perl b/git-svnimport.perl
index cbaa8ab37c78769002e10947d7ca08fc440e552f..f31fcf84ed3150a1d53676cd1e01ba276b122cba 100755 (executable)
--- a/git-svnimport.perl
+++ b/git-svnimport.perl
@@ -31,12 +31,13 @@ $SIG{'PIPE'}="IGNORE";
 $ENV{'TZ'}="UTC";
 
 our($opt_h,$opt_o,$opt_v,$opt_u,$opt_C,$opt_i,$opt_m,$opt_M,$opt_t,$opt_T,
-    $opt_b,$opt_r,$opt_I,$opt_A,$opt_s,$opt_l,$opt_d,$opt_D,$opt_S,$opt_F,$opt_P);
+    $opt_b,$opt_r,$opt_I,$opt_A,$opt_s,$opt_l,$opt_d,$opt_D,$opt_S,$opt_F,
+    $opt_P,$opt_R);
 
 sub usage() {
        print STDERR <<END;
 Usage: ${\basename $0}     # fetch/update GIT from SVN
-       [-o branch-for-HEAD] [-h] [-v] [-l max_rev]
+       [-o branch-for-HEAD] [-h] [-v] [-l max_rev] [-R repack_each_revs]
        [-C GIT_repository] [-t tagname] [-T trunkname] [-b branchname]
        [-d|-D] [-i] [-u] [-r] [-I ignorefilename] [-s start_chg]
        [-m] [-M regex] [-A author_file] [-S] [-F] [-P project_name] [SVN_URL]
@@ -44,7 +45,7 @@ END
        exit(1);
 }
 
-getopts("A:b:C:dDFhiI:l:mM:o:rs:t:T:SP:uv") or usage();
+getopts("A:b:C:dDFhiI:l:mM:o:rs:t:T:SP:R:uv") or usage();
 usage if $opt_h;
 
 my $tag_name = $opt_t || "tags";
@@ -52,6 +53,7 @@ my $trunk_name = $opt_T || "trunk";
 my $branch_name = $opt_b || "branches";
 my $project_name = $opt_P || "";
 $project_name = "/" . $project_name if ($project_name);
+my $repack_after = $opt_R || 1000;
 
 @ARGV == 1 or @ARGV == 2 or usage();
 
@@ -934,11 +936,27 @@ if ($opt_l < $current_rev) {
     exit;
 }
 
-print "Fetching from $current_rev to $opt_l ...\n" if $opt_v;
+print "Processing from $current_rev to $opt_l ...\n" if $opt_v;
 
-my $pool=SVN::Pool->new;
-$svn->{'svn'}->get_log("/",$current_rev,$opt_l,0,1,1,\&commit_all,$pool);
-$pool->clear;
+my $from_rev;
+my $to_rev = $current_rev;
+
+while ($to_rev < $opt_l) {
+       $from_rev = $to_rev;
+       $to_rev = $from_rev + $repack_after;
+       $to_rev = $opt_l if $opt_l < $to_rev;
+       print "Fetching from $from_rev to $to_rev ...\n" if $opt_v;
+       my $pool=SVN::Pool->new;
+       $svn->{'svn'}->get_log("/",$from_rev,$to_rev,0,1,1,\&commit_all,$pool);
+       $pool->clear;
+       my $pid = fork();
+       die "Fork: $!\n" unless defined $pid;
+       unless($pid) {
+               exec("git-repack", "-d")
+                       or die "Cannot repack: $!\n";
+       }
+       waitpid($pid, 0);
+}
 
 
 unlink($git_index);