mirror of
https://github.com/git/git.git
synced 2024-11-24 10:26:17 +08:00
c015bf2bcb
svn doesn't seem to save file modes: removed the code that analyzes them. Signed-Off-By: Matthias Urlichs <smurf@smurf.noris.de>
653 lines
15 KiB
Perl
Executable File
653 lines
15 KiB
Perl
Executable File
#!/usr/bin/perl -w
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# This tool is copyright (c) 2005, Matthias Urlichs.
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# It is released under the Gnu Public License, version 2.
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#
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# The basic idea is to pull and analyze SVN changes.
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#
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# Checking out the files is done by a single long-running CVS connection
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# / server process.
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#
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# The head revision is on branch "origin" by default.
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# You can change that with the '-o' option.
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require v5.8.0; # for shell-safe open("-|",LIST)
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use strict;
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use warnings;
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use Getopt::Std;
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use File::Spec;
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use File::Temp qw(tempfile);
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use File::Path qw(mkpath);
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use File::Basename qw(basename dirname);
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use Time::Local;
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use IO::Pipe;
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use POSIX qw(strftime dup2);
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use IPC::Open2;
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use SVN::Core;
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use SVN::Ra;
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$SIG{'PIPE'}="IGNORE";
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$ENV{'TZ'}="UTC";
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our($opt_h,$opt_o,$opt_v,$opt_u,$opt_C,$opt_i,$opt_m,$opt_M,$opt_t,$opt_T,$opt_b);
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sub usage() {
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print STDERR <<END;
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Usage: ${\basename $0} # fetch/update GIT from CVS
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[-o branch-for-HEAD] [-h] [-v]
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[-C GIT_repository] [-t tagname] [-T trunkname] [-b branchname]
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[-i] [-u] [-s subst] [-m] [-M regex] [SVN_URL]
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END
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exit(1);
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}
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getopts("b:C:hivmM:o:t:T:u") or usage();
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usage if $opt_h;
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my $tag_name = $opt_t || "tags";
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my $trunk_name = $opt_T || "trunk";
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my $branch_name = $opt_b || "branches";
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@ARGV <= 1 or usage();
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$opt_o ||= "origin";
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my $git_tree = $opt_C;
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$git_tree ||= ".";
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my $cvs_tree;
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if ($#ARGV == 0) {
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$cvs_tree = $ARGV[0];
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} elsif (-f 'CVS/Repository') {
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open my $f, '<', 'CVS/Repository' or
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die 'Failed to open CVS/Repository';
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$cvs_tree = <$f>;
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chomp $cvs_tree;
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close $f;
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} else {
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usage();
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}
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our @mergerx = ();
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if ($opt_m) {
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@mergerx = ( qr/\W(?:from|of|merge|merging|merged) (\w+)/i );
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}
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if ($opt_M) {
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push (@mergerx, qr/$opt_M/);
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}
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select(STDERR); $|=1; select(STDOUT);
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package SVNconn;
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# Basic SVN connection.
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# We're only interested in connecting and downloading, so ...
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use File::Spec;
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use File::Temp qw(tempfile);
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use POSIX qw(strftime dup2);
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sub new {
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my($what,$repo) = @_;
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$what=ref($what) if ref($what);
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my $self = {};
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$self->{'buffer'} = "";
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bless($self,$what);
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$repo =~ s#/+$##;
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$self->{'fullrep'} = $repo;
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$self->conn();
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$self->{'lines'} = undef;
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return $self;
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}
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sub conn {
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my $self = shift;
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my $repo = $self->{'fullrep'};
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my $s = SVN::Ra->new($repo);
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die "SVN connection to $repo: $!\n" unless defined $s;
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$self->{'svn'} = $s;
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$self->{'repo'} = $repo;
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$self->{'maxrev'} = $s->get_latest_revnum();
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}
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sub file {
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my($self,$path,$rev) = @_;
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my $res;
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my ($fh, $name) = tempfile('gitsvn.XXXXXX',
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DIR => File::Spec->tmpdir(), UNLINK => 1);
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print "... $rev $path ...\n" if $opt_v;
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eval { $self->{'svn'}->get_file($path,$rev,$fh); };
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if (defined $@ and $@ !~ /Attempted to get checksum/) {
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# retry
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$self->conn();
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eval { $self->{'svn'}->get_file($path,$rev,$fh); };
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};
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return () if defined $@ and $@ !~ /Attempted to get checksum/;
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die $@ if $@;
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close ($fh);
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return ($name, $res);
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}
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package main;
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my $svn = SVNconn->new($cvs_tree);
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sub pdate($) {
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my($d) = @_;
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$d =~ m#(\d\d\d\d)-(\d\d)-(\d\d)T(\d\d):(\d\d):(\d\d)#
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or die "Unparseable date: $d\n";
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my $y=$1; $y-=1900 if $y>1900;
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return timegm($6||0,$5,$4,$3,$2-1,$y);
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}
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sub getwd() {
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my $pwd = `pwd`;
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chomp $pwd;
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return $pwd;
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}
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sub get_headref($$) {
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my $name = shift;
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my $git_dir = shift;
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my $sha;
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if (open(C,"$git_dir/refs/heads/$name")) {
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chomp($sha = <C>);
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close(C);
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length($sha) == 40
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or die "Cannot get head id for $name ($sha): $!\n";
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}
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return $sha;
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}
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-d $git_tree
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or mkdir($git_tree,0777)
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or die "Could not create $git_tree: $!";
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chdir($git_tree);
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my $orig_branch = "";
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my $forward_master = 0;
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my %branches;
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my $git_dir = $ENV{"GIT_DIR"} || ".git";
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$git_dir = getwd()."/".$git_dir unless $git_dir =~ m#^/#;
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$ENV{"GIT_DIR"} = $git_dir;
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my $orig_git_index;
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$orig_git_index = $ENV{GIT_INDEX_FILE} if exists $ENV{GIT_INDEX_FILE};
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my ($git_ih, $git_index) = tempfile('gitXXXXXX', SUFFIX => '.idx',
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DIR => File::Spec->tmpdir());
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close ($git_ih);
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$ENV{GIT_INDEX_FILE} = $git_index;
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my $maxnum = 0;
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my $last_rev = "";
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my $last_branch;
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my $current_rev = 0;
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unless(-d $git_dir) {
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system("git-init-db");
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die "Cannot init the GIT db at $git_tree: $?\n" if $?;
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system("git-read-tree");
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die "Cannot init an empty tree: $?\n" if $?;
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$last_branch = $opt_o;
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$orig_branch = "";
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} else {
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-f "$git_dir/refs/heads/$opt_o"
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or die "Branch '$opt_o' does not exist.\n".
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"Either use the correct '-o branch' option,\n".
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"or import to a new repository.\n";
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-f "$git_dir/svn2git"
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or die "'$git_dir/svn2git' does not exist.\n".
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"You need that file for incremental imports.\n";
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$last_branch = basename(readlink("$git_dir/HEAD"));
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unless($last_branch) {
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warn "Cannot read the last branch name: $! -- assuming 'master'\n";
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$last_branch = "master";
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}
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$orig_branch = $last_branch;
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$last_rev = get_headref($orig_branch, $git_dir);
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if (-f "$git_dir/SVN2GIT_HEAD") {
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die <<EOM;
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SVN2GIT_HEAD exists.
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Make sure your working directory corresponds to HEAD and remove SVN2GIT_HEAD.
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You may need to run
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git-read-tree -m -u SVN2GIT_HEAD HEAD
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EOM
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}
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system('cp', "$git_dir/HEAD", "$git_dir/SVN2GIT_HEAD");
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$forward_master =
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$opt_o ne 'master' && -f "$git_dir/refs/heads/master" &&
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system('cmp', '-s', "$git_dir/refs/heads/master",
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"$git_dir/refs/heads/$opt_o") == 0;
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# populate index
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system('git-read-tree', $last_rev);
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die "read-tree failed: $?\n" if $?;
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# Get the last import timestamps
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open my $B,"<", "$git_dir/svn2git";
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while(<$B>) {
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chomp;
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my($num,$branch,$ref) = split;
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$branches{$branch}{$num} = $ref;
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$branches{$branch}{"LAST"} = $ref;
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$current_rev = $num+1 if $current_rev < $num+1;
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}
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close($B);
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}
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-d $git_dir
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or die "Could not create git subdir ($git_dir).\n";
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open BRANCHES,">>", "$git_dir/svn2git";
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## cvsps output:
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#---------------------
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#PatchSet 314
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#Date: 1999/09/18 13:03:59
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#Author: wkoch
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#Branch: STABLE-BRANCH-1-0
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#Ancestor branch: HEAD
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#Tag: (none)
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#Log:
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# See ChangeLog: Sat Sep 18 13:03:28 CEST 1999 Werner Koch
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#Members:
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# README:1.57->1.57.2.1
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# VERSION:1.96->1.96.2.1
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#
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#---------------------
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my $state = 0;
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sub get_file($$$) {
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my($rev,$branch,$path) = @_;
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# revert split_path(), below
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my $svnpath;
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$path = "" if $path eq "/"; # this should not happen, but ...
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if($branch eq "/") {
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$svnpath = "/$trunk_name/$path";
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} elsif($branch =~ m#^/#) {
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$svnpath = "/$tag_name$branch/$path";
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} else {
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$svnpath = "/$branch_name/$branch/$path";
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}
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# now get it
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my ($name, $res) = eval { $svn->file($svnpath,$rev); };
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return () unless defined $name;
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open my $F, '-|', "git-hash-object -w $name"
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or die "Cannot create object: $!\n";
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my $sha = <$F>;
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chomp $sha;
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close $F;
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my $mode = "0644"; # SV does not seem to store any file modes
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return [$mode, $sha, $path];
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}
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sub split_path($$) {
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my($rev,$path) = @_;
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my $branch;
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if($path =~ s#^/\Q$tag_name\E/([^/]+)/?##) {
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$branch = "/$1";
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} elsif($path =~ s#^/\Q$trunk_name\E/?##) {
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$branch = "/";
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} elsif($path =~ s#^/\Q$branch_name\E/([^/]+)/?##) {
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$branch = $1;
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} else {
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print STDERR "$rev: Unrecognized path: $path\n";
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return ()
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}
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$path = "/" if $path eq "";
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return ($branch,$path);
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}
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sub commit {
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my($branch, $changed_paths, $revision, $author, $date, $message) = @_;
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my($author_name,$author_email,$dest);
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my(@old,@new);
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if (not defined $author) {
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$author_name = $author_email = "unknown";
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} elsif ($author =~ /^(.*?)\s+<(.*)>$/) {
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($author_name, $author_email) = ($1, $2);
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} else {
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$author =~ s/^<(.*)>$/$1/;
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$author_name = $author_email = $author;
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}
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$date = pdate($date);
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my $tag;
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my $parent;
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if($branch eq "/") { # trunk
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$parent = $opt_o;
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} elsif($branch =~ m#^/(.+)#) { # tag
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$tag = 1;
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$parent = $1;
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} else { # "normal" branch
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# nothing to do
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$parent = $branch;
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}
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$dest = $parent;
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my $prev = $changed_paths->{"/"};
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if($prev and $prev->action eq "A") {
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delete $changed_paths->{"/"};
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my $oldpath = $prev->copyfrom_path;
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my $rev;
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if(defined $oldpath) {
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my $p;
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($parent,$p) = split_path($revision,$oldpath);
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if($parent eq "/") {
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$parent = $opt_o;
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} else {
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$parent =~ s#^/##; # if it's a tag
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}
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} else {
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$parent = undef;
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}
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}
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my $rev;
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if(defined $parent) {
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open(H,"git-rev-parse --verify $parent |");
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$rev = <H>;
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close(H) or do {
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print STDERR "$revision: cannot find commit '$parent'!\n";
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return;
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};
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chop $rev;
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if(length($rev) != 40) {
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print STDERR "$revision: cannot find commit '$parent'!\n";
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return;
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}
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$rev = $branches{($parent eq $opt_o) ? "/" : $parent}{"LAST"};
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if($revision != 1 and not $rev) {
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print STDERR "$revision: do not know ancestor for '$parent'!\n";
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return;
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}
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} else {
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$rev = undef;
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}
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# if($prev and $prev->action eq "A") {
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# if(not $tag) {
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# unless(open(H,"> $git_dir/refs/heads/$branch")) {
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# print STDERR "$revision: Could not create branch $branch: $!\n";
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# $state=11;
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# next;
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# }
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# print H "$rev\n"
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# or die "Could not write branch $branch: $!";
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# close(H)
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# or die "Could not write branch $branch: $!";
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# }
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# }
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if(not defined $rev) {
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unlink($git_index);
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} elsif ($rev ne $last_rev) {
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print "Switching from $last_rev to $rev ($branch)\n" if $opt_v;
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system("git-read-tree", $rev);
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die "read-tree failed for $rev: $?\n" if $?;
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$last_rev = $rev;
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}
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while(my($path,$action) = each %$changed_paths) {
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if ($action->action eq "A") {
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my $f = get_file($revision,$branch,$path);
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push(@new,$f) if $f;
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} elsif ($action->action eq "D") {
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push(@old,$path);
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} elsif ($action->action eq "M") {
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my $f = get_file($revision,$branch,$path);
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push(@new,$f) if $f;
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} elsif ($action->action eq "R") {
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# refer to a file/tree in an earlier commit
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push(@old,$path); # remove any old stuff
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# ... and add any new stuff
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my($b,$p) = split_path($revision,$action->oldpath);
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open my $F,"-|","git-ls-tree","-r","-z", $branches{$b}{$action->oldrev}, $p;
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local $/ = '\0';
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while(<$F>) {
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chomp;
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my($m,$p) = split(/\t/,$_,2);
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my($mode,$type,$sha1) = split(/ /,$m);
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next if $type ne "blob";
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push(@new,[$mode,$sha1,$p]);
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}
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} else {
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die "$revision: unknown action '".$action->action."' for $path\n";
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}
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}
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if(@old) {
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open F, "-│", "git-ls-files", "-z", @old or die $!;
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@old = ();
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local $/ = '\0';
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while(<F>) {
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chomp;
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push(@old,$_);
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}
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close(F);
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while(@old) {
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my @o2;
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if(@old > 55) {
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@o2 = splice(@old,0,50);
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} else {
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@o2 = @old;
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@old = ();
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}
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system("git-update-index","--force-remove","--",@o2);
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die "Cannot remove files: $?\n" if $?;
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}
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}
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while(@new) {
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my @n2;
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if(@new > 12) {
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@n2 = splice(@new,0,10);
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} else {
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@n2 = @new;
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@new = ();
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}
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system("git-update-index","--add",
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(map { ('--cacheinfo', @$_) } @n2));
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die "Cannot add files: $?\n" if $?;
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}
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my $pid = open(C,"-|");
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die "Cannot fork: $!" unless defined $pid;
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unless($pid) {
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exec("git-write-tree");
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die "Cannot exec git-write-tree: $!\n";
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}
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chomp(my $tree = <C>);
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length($tree) == 40
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or die "Cannot get tree id ($tree): $!\n";
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close(C)
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or die "Error running git-write-tree: $?\n";
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print "Tree ID $tree\n" if $opt_v;
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my $pr = IO::Pipe->new() or die "Cannot open pipe: $!\n";
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my $pw = IO::Pipe->new() or die "Cannot open pipe: $!\n";
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$pid = fork();
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die "Fork: $!\n" unless defined $pid;
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unless($pid) {
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$pr->writer();
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$pw->reader();
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open(OUT,">&STDOUT");
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dup2($pw->fileno(),0);
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dup2($pr->fileno(),1);
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$pr->close();
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$pw->close();
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my @par = ();
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@par = ("-p",$rev) if defined $rev;
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# loose detection of merges
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# based on the commit msg
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foreach my $rx (@mergerx) {
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if ($message =~ $rx) {
|
|
my $mparent = $1;
|
|
if ($mparent eq 'HEAD') { $mparent = $opt_o };
|
|
if ( -e "$git_dir/refs/heads/$mparent") {
|
|
$mparent = get_headref($mparent, $git_dir);
|
|
push @par, '-p', $mparent;
|
|
print OUT "Merge parent branch: $mparent\n" if $opt_v;
|
|
}
|
|
}
|
|
}
|
|
|
|
exec("env",
|
|
"GIT_AUTHOR_NAME=$author_name",
|
|
"GIT_AUTHOR_EMAIL=$author_email",
|
|
"GIT_AUTHOR_DATE=".strftime("+0000 %Y-%m-%d %H:%M:%S",gmtime($date)),
|
|
"GIT_COMMITTER_NAME=$author_name",
|
|
"GIT_COMMITTER_EMAIL=$author_email",
|
|
"GIT_COMMITTER_DATE=".strftime("+0000 %Y-%m-%d %H:%M:%S",gmtime($date)),
|
|
"git-commit-tree", $tree,@par);
|
|
die "Cannot exec git-commit-tree: $!\n";
|
|
}
|
|
$pw->writer();
|
|
$pr->reader();
|
|
|
|
$message =~ s/[\s\n]+\z//;
|
|
|
|
print $pw "$message\n"
|
|
or die "Error writing to git-commit-tree: $!\n";
|
|
$pw->close();
|
|
|
|
print "Committed change $revision:$branch ".strftime("%Y-%m-%d %H:%M:%S",gmtime($date)).")\n" if $opt_v;
|
|
chomp(my $cid = <$pr>);
|
|
length($cid) == 40
|
|
or die "Cannot get commit id ($cid): $!\n";
|
|
print "Commit ID $cid\n" if $opt_v;
|
|
$pr->close();
|
|
|
|
waitpid($pid,0);
|
|
die "Error running git-commit-tree: $?\n" if $?;
|
|
|
|
if(defined $dest) {
|
|
print "Writing to refs/heads/$dest\n" if $opt_v;
|
|
open(C,">$git_dir/refs/heads/$dest") and
|
|
print C ("$cid\n") and
|
|
close(C)
|
|
or die "Cannot write branch $dest for update: $!\n";
|
|
} else {
|
|
print "... no known parent\n" if $opt_v;
|
|
}
|
|
$branches{$branch}{"LAST"} = $cid;
|
|
$branches{$branch}{$revision} = $cid;
|
|
$last_rev = $cid;
|
|
print BRANCHES "$revision $branch $cid\n";
|
|
print "DONE: $revision $dest $cid\n" if $opt_v;
|
|
|
|
if($tag) {
|
|
my($in, $out) = ('','');
|
|
$last_rev = "-" if %$changed_paths;
|
|
# the tag was 'complex', i.e. did not refer to a "real" revision
|
|
|
|
$tag =~ tr/_/\./ if $opt_u;
|
|
|
|
my $pid = open2($in, $out, 'git-mktag');
|
|
print $out ("object $cid\n".
|
|
"type commit\n".
|
|
"tag $tag\n".
|
|
"tagger $author_name <$author_email>\n") and
|
|
close($out)
|
|
or die "Cannot create tag object $tag: $!\n";
|
|
|
|
my $tagobj = <$in>;
|
|
chomp $tagobj;
|
|
|
|
if ( !close($in) or waitpid($pid, 0) != $pid or
|
|
$? != 0 or $tagobj !~ /^[0123456789abcdef]{40}$/ ) {
|
|
die "Cannot create tag object $tag: $!\n";
|
|
}
|
|
|
|
|
|
open(C,">$git_dir/refs/tags/$tag")
|
|
or die "Cannot create tag $tag: $!\n";
|
|
print C "$tagobj\n"
|
|
or die "Cannot write tag $tag: $!\n";
|
|
close(C)
|
|
or die "Cannot write tag $tag: $!\n";
|
|
|
|
print "Created tag '$tag' on '$branch'\n" if $opt_v;
|
|
}
|
|
}
|
|
|
|
my ($changed_paths, $revision, $author, $date, $message, $pool) = @_;
|
|
sub _commit_all {
|
|
($changed_paths, $revision, $author, $date, $message, $pool) = @_;
|
|
}
|
|
sub commit_all {
|
|
my %done;
|
|
my @col;
|
|
my $pref;
|
|
my $branch;
|
|
|
|
while(my($path,$action) = each %$changed_paths) {
|
|
($branch,$path) = split_path($revision,$path);
|
|
next if not defined $branch;
|
|
$done{$branch}{$path} = $action;
|
|
}
|
|
while(($branch,$changed_paths) = each %done) {
|
|
commit($branch, $changed_paths, $revision, $author, $date, $message);
|
|
}
|
|
}
|
|
|
|
while(++$current_rev < $svn->{'maxrev'}) {
|
|
$svn->{'svn'}->get_log("/",$current_rev,$current_rev,$current_rev,1,1,\&_commit_all,"");
|
|
commit_all();
|
|
}
|
|
|
|
|
|
unlink($git_index);
|
|
|
|
if (defined $orig_git_index) {
|
|
$ENV{GIT_INDEX_FILE} = $orig_git_index;
|
|
} else {
|
|
delete $ENV{GIT_INDEX_FILE};
|
|
}
|
|
|
|
# Now switch back to the branch we were in before all of this happened
|
|
if($orig_branch) {
|
|
print "DONE\n" if $opt_v;
|
|
system("cp","$git_dir/refs/heads/$opt_o","$git_dir/refs/heads/master")
|
|
if $forward_master;
|
|
unless ($opt_i) {
|
|
system('git-read-tree', '-m', '-u', 'SVN2GIT_HEAD', 'HEAD');
|
|
die "read-tree failed: $?\n" if $?;
|
|
}
|
|
} else {
|
|
$orig_branch = "master";
|
|
print "DONE; creating $orig_branch branch\n" if $opt_v;
|
|
system("cp","$git_dir/refs/heads/$opt_o","$git_dir/refs/heads/master")
|
|
unless -f "$git_dir/refs/heads/master";
|
|
unlink("$git_dir/HEAD");
|
|
symlink("refs/heads/$orig_branch","$git_dir/HEAD");
|
|
unless ($opt_i) {
|
|
system('git checkout');
|
|
die "checkout failed: $?\n" if $?;
|
|
}
|
|
}
|
|
unlink("$git_dir/SVN2GIT_HEAD");
|
|
close(BRANCHES);
|