git-svn: remove the 'rebuild' command and make the functionality automatic

Since refs/remotes/* are not automatically cloned, we expect the
user to be capable of copying those references themselves
anyways.

Also removed the documentation for --ignore-nodate while we're
at it; it has also been made automatic.

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

Documentation/git-svn.txt

@@ -93,16 +93,6 @@ remotes/git-svn.
 	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 gitlink:git-clone[1]) 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.  A Subversion URL may be optionally
-	specified at the command-line if the directory/repository you're
-	tracking has moved or changed protocols.
-
 'show-ignore'::
 	Recursively finds and lists the svn:ignore property on
 	directories.  The output is suitable for appending to
@@ -322,9 +312,9 @@ config key: svn.followparent
 --no-metadata::
 	This gets rid of the git-svn-id: lines at the end of every commit.
 
-	With this, you lose the ability to use the rebuild command.  If
+	If you lose your .git/svn/git-svn/.rev_db file, git-svn will not
-	you ever lose your .git/svn/git-svn/.rev_db file, you won't be
+	be able to rebuild it and you won't be able to fetch again,
-	able to fetch again, either.  This is fine for one-shot imports.
+	either.  This is fine for one-shot imports.
 
 	The 'git-svn log' command will not work on repositories using this,
 	either.
@@ -333,31 +323,6 @@ config key: svn.nometadata
 
 --
 
-COMPATIBILITY OPTIONS
----------------------
---
-
---upgrade::
-Only used with the 'rebuild' command.
-
-Run this if you used an old version of git-svn that used
-"git-svn-HEAD" instead of "remotes/git-svn" as the branch
-for tracking the remote.
-
---ignore-nodate::
-Only used with the 'fetch' command.
-
-By default git-svn will crash if it tries to import a revision
-from SVN which has '(no date)' listed as the date of the revision.
-This is repository corruption on SVN's part, plain and simple.
-But sometimes you really need those revisions anyway.
-
-If supplied git-svn will convert '(no date)' entries to the UNIX
-epoch (midnight on Jan. 1, 1970).  Yes, that's probably very wrong.
-SVN was very wrong.
-
---
-
 Basic Examples
 ~~~~~~~~~~~~~~
 

git-svn.perl

@@ -106,9 +106,6 @@ my %cmd = (
 			{ 'stdin|' => \$_stdin, %cmt_opts, %fc_opts, } ],
 	'show-ignore' => [ \&cmd_show_ignore, "Show svn:ignore listings",
 			{ 'revision|r=i' => \$_revision } ],
-	rebuild => [ \&cmd_rebuild, "Rebuild git-svn metadata (after git clone)",
-			{ 'copy-remote|remote=s' => \$_cp_remote,
-			  'upgrade' => \$_upgrade } ],
 	'multi-init' => [ \&cmd_multi_init,
 			'Initialize multiple trees (like git-svnimport)',
 			{ %multi_opts, %init_opts, %remote_opts,
@@ -166,7 +163,7 @@ usage(0) if $_help;
 version() if $_version;
 usage(1) unless defined $cmd;
 load_authors() if $_authors;
-unless ($cmd =~ /^(?:init|rebuild|multi-init|commit-diff)$/) {
+unless ($cmd =~ /^(?:init|multi-init|commit-diff)$/) {
 	Git::SVN::Migration::migration_check();
 }
 eval {
@@ -211,47 +208,6 @@ sub version {
 	exit 0;
 }
 
-sub cmd_rebuild {
-	my $url = shift;
-	my $gs = $url ? Git::SVN->init($url)
-	              : eval { Git::SVN->new };
-	$gs ||= Git::SVN->_new;
-	if (!verify_ref($gs->refname.'^0')) {
-		$gs->copy_remote_ref;
-	}
-
-	my ($rev_list, $ctx) = command_output_pipe("rev-list", $gs->refname);
-	my $latest;
-	my $svn_uuid;
-	while (<$rev_list>) {
-		chomp;
-		my $c = $_;
-		fatal "Non-SHA1: $c\n" unless $c =~ /^$sha1$/o;
-		my ($url, $rev, $uuid) = cmt_metadata($c);
-
-		# 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 ((defined $svn_uuid && ($uuid ne $svn_uuid)) ||
-		    ($gs->{url} && $url && ($url ne $gs->{url}))) {
-			next;
-		}
-
-		unless (defined $latest) {
-			if (!$gs->{url} && !$url) {
-				fatal "SVN repository location required\n";
-			}
-			$gs = Git::SVN->init($url);
-			$latest = $rev;
-		}
-		$gs->rev_db_set($rev, $c);
-		print "r$rev = $c\n";
-	}
-	command_close_pipe($rev_list, $ctx);
-}
-
 sub do_git_init_db {
 	unless (-d $ENV{GIT_DIR}) {
 		my @init_db = ('init');
@@ -863,6 +819,9 @@ sub new {
 	$self->{url} = command_oneline('config', '--get',
 	                               "svn-remote.$repo_id.url") or
                   die "Failed to read \"svn-remote.$repo_id.url\" in config\n";
+	if (-z $self->{db_path} && ::verify_ref($self->refname.'^0')) {
+		$self->rebuild;
+	}
 	$self;
 }
 
@@ -883,17 +842,6 @@ sub rel_path {
 	$url;
 }
 
-sub copy_remote_ref {
-	my ($self) = @_;
-	my $origin = $::_cp_remote ? $::_cp_remote : 'origin';
-	my $ref = $self->refname;
-	if (command('ls-remote', $origin, $ref)) {
-		command_noisy('fetch', $origin, "$ref:$ref");
-	} elsif ($::_cp_remote && !$::_upgrade) {
-		die "Unable to find remote reference: $ref on $origin\n";
-	}
-}
-
 sub traverse_ignore {
 	my ($self, $fh, $path, $r) = @_;
 	$path =~ s#^/+##g;
@@ -1359,6 +1307,38 @@ sub set_tree {
 	}
 }
 
+sub rebuild {
+	my ($self) = @_;
+	print "Rebuilding $self->{db_path} ...\n";
+	my ($rev_list, $ctx) = command_output_pipe("rev-list", $self->refname);
+	my $latest;
+	my $full_url = $self->full_url;
+	my $svn_uuid;
+	while (<$rev_list>) {
+		chomp;
+		my $c = $_;
+		die "Non-SHA1: $c\n" unless $c =~ /^$::sha1$/o;
+		my ($url, $rev, $uuid) = ::cmt_metadata($c);
+
+		# 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 ((defined $svn_uuid && ($uuid ne $svn_uuid)) ||
+		    ($full_url && $url && ($url ne $full_url))) {
+			next;
+		}
+		$latest ||= $rev;
+		$svn_uuid ||= $uuid;
+
+		$self->rev_db_set($rev, $c);
+		print "r$rev = $c\n";
+	}
+	command_close_pipe($rev_list, $ctx);
+	print "Done rebuilding $self->{db_path}\n";
+}
+
 # rev_db:
 # 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