[PATCH] cvsimport: rewritten in Perl
- From
Matthias Urlichs <smurf@smurf.noris.de>
- Date
- Jun 28, 2005, 19:23 UTC
- Message-ID
- <pan.2005.06.28.19.23.08.307486@smurf.noris.de>
I just got my machine blocked from a CVS server which didn't like to get hammered with connections.
That was cvs2git's shell script. Which, by the way, is slow as hell.
Appended: a git-cvsimport script, written in Perl, which directly talks to the CVS server. If the repository is local, it runs a "cvs server" child. It produces the same git repository as Linus' version. It can do incremental imports. And it's 20 times faster (on my system, with a local CVS repository).
cvs2git is thus obsolete; this patch deletes it.
Signed-Off-By: Matthias Urlichs <smurf@smurf.noris.de>
---
diff --git a/Documentation/cvs-migration.txt b/Documentation/cvs-migration.txt --- a/Documentation/cvs-migration.txt +++ b/Documentation/cvs-migration.txt @@ -63,18 +63,38 @@ Once you've gotten (and installed) cvsps any more familiar with it, but make sure it is in your path. After that, the magic command line is - git cvsimport <cvsroot> <module> + git cvsimport -v -d <cvsroot> <module> <destination> which will do exactly what you'd think it does: it will create a git -archive of the named CVS module. The new archive will be created in a -subdirectory named <module>. +archive of the named CVS module. The new archive will be created in the +subdirectory named <destination>; it'll be created if it doesn't exist. +Default is the local directory. It can take some time to actually do the conversion for a large archive since it involves checking out from CVS every revision of every file, -and the conversion script can be reasonably chatty, but on some not very -scientific tests it averaged about eight revisions per second, so a -medium-sized project should not take more than a couple of minutes. For -larger projects or remote repositories, the process may take longer. +and the conversion script is reasonably chatty unless you omit the '-v' +option, but on some not very scientific tests it averaged about twenty +revisions per second, so a medium-sized project should not take more +than a couple of minutes. For larger projects or remote repositories, +the process may take longer. + +After the (initial) import is done, the CVS archive's current head +revision will be checked out -- thus, you can start adding your own +changes right away. + +The import is incremental, i.e. if you call it again next month it'll +fetch any CVS updates that have been happening in the meantime. The +cut-off is date-based, so don't change the branches that were imported +from CVS. + +You can merge those updates (or, in fact, a different CVS branch) into +your main branch: + + cg-merge <branch> + +The HEAD revision from CVS is named "origin", not "HEAD", because git +already uses "HEAD". (If you don't like 'origin', use cvsimport's +'-o' option to change it.) Emulating CVS behaviour diff --git a/Makefile b/Makefile --- a/Makefile +++ b/Makefile @@ -35,7 +35,7 @@ PROG= git-update-cache git-diff-files git-http-pull git-ssh-push git-ssh-pull git-rev-list git-mktag \ git-diff-helper git-tar-tree git-local-pull git-write-blob \ git-get-tar-commit-id git-apply git-stripspace \ - git-cvs2git git-diff-stages git-rev-parse git-patch-id \ + git-diff-stages git-rev-parse git-patch-id \ git-pack-objects git-unpack-objects all: $(PROG) @@ -118,7 +118,6 @@ git-diff-helper: diff-helper.c git-tar-tree: tar-tree.c git-write-blob: write-blob.c git-stripspace: stripspace.c -git-cvs2git: cvs2git.c git-diff-stages: diff-stages.c git-rev-parse: rev-parse.c git-patch-id: patch-id.c diff --git a/cvs2git.c b/cvs2git.c deleted file mode 100644 --- a/cvs2git.c +++ /dev/null @@ -1,329 +0,0 @@ -/* - * cvs2git - * - * Copyright (C) Linus Torvalds 2005 - */ - -#include <stdio.h> -#include <ctype.h> -#include <string.h> -#include <stdlib.h> -#include <unistd.h> - -static int verbose = 0; - -/* - * This is a really stupid program that takes cvsps output, and - * generates a a long _shell_script_ that will create the GIT archive - * from it. - * - * You've been warned. I told you it was stupid. - * - * NOTE NOTE NOTE! In order to do branches correctly, this needs - * the fixed cvsps that has the "Ancestor branch" tag output. - * Hopefully David Mansfield will update his distribution soon - * enough (he's the one who wrote the patch, so at least we don't - * have to figt maintainer issues ;) - * - * Usage: - * - * TZ=UTC cvsps -A | - * git-cvs2git --cvsroot=[root] --module=[module] > script - * - * Creates a shell script that will generate the .git archive of - * the names CVS repository. - * - * TZ=UTC cvsps -s 1234- -A | - * git-cvs2git -u --cvsroot=[root] --module=[module] > script - * - * Creates a shell script that will update the .git archive with - * CVS changes from patchset 1234 until the last one. - * - * IMPORTANT NOTE ABOUT "cvsps"! This requires version 2.1 or better, - * and the "TZ=UTC" and the "-A" flag is required for sane results! - */ -enum state { - Header, - Log, - Members -}; - -static const char *cvsroot; -static const char *cvsmodule; - -static char date[100]; -static char author[100]; -static char branch[100]; -static char ancestor[100]; -static char tag[100]; -static char log[32768]; -static int loglen = 0; -static int initial_commit = 1; - -static void lookup_author(char *n, char **name, char **email) -{ - /* - * FIXME!!! I'm lazy and stupid. - * - * This could be something like - * - * printf("lookup_author '%s'\n", n); - * *name = "$author_name"; - * *email = "$author_email"; - * - * and that would allow the script to do its own - * lookups at run-time. - */ - *name = n; - *email = n; -} - -static void prepare_commit(void) -{ - char *author_name, *author_email; - char *src_branch; - - lookup_author(author, &author_name, &author_email); - - printf("export GIT_COMMITTER_NAME=%s\n", author_name); - printf("export GIT_COMMITTER_EMAIL=%s\n", author_email); - printf("export GIT_COMMITTER_DATE='+0000 %s'\n", date); - - printf("export GIT_AUTHOR_NAME=%s\n", author_name); - printf("export GIT_AUTHOR_EMAIL=%s\n", author_email); - printf("export GIT_AUTHOR_DATE='+0000 %s'\n", date); - - if (initial_commit) - return; - - src_branch = *ancestor ? ancestor : branch; - if (!strcmp(src_branch, "HEAD")) - src_branch = "master"; - printf("ln -sf refs/heads/'%s' .git/HEAD\n", src_branch); - - /* - * Even if cvsps claims an ancestor, we'll let the new - * branch name take precedence if it already exists - */ - if (*ancestor) { - src_branch = branch; - if (!strcmp(src_branch, "HEAD")) - src_branch = "master"; - printf("[ -e .git/refs/heads/'%s' ] && ln -sf refs/heads/'%s' .git/HEAD\n", - src_branch, src_branch); - } - - printf("git-read-tree -m HEAD || exit 1\n"); - printf("git-checkout-cache -f -u -a\n"); -} - -static void commit(void) -{ - const char *cmit_parent = initial_commit ? "" : "-p HEAD"; - const char *dst_branch; - char *space; - int i; - - printf("tree=$(git-write-tree)\n"); - printf("cat > .cmitmsg <<EOFMSG\n"); - - /* Escape $ characters, and remove control characters */ - for (i = 0; i < loglen; i++) { - unsigned char c = log[i]; - - switch (c) { - case '$': - case '\\': - case '`': - putchar('\\'); - break; - case 0 ... 31: - if (c == '\n' || c == '\t') - break; - case 128 ... 159: - continue; - } - putchar(c); - } - printf("\nEOFMSG\n"); - printf("commit=$(cat .cmitmsg | git-commit-tree $tree %s)\n", cmit_parent); - - dst_branch = branch; - if (!strcmp(dst_branch, "HEAD")) - dst_branch = "master"; - - printf("echo $commit > .git/refs/heads/'%s'\n", dst_branch); - - space = strchr(tag, ' '); - if (space) - *space = 0; - if (strcmp(tag, "(none)")) - printf("echo $commit > .git/refs/tags/'%s'\n", tag); - - printf("echo 'Committed (to %s):' ; cat .cmitmsg; echo\n", dst_branch); - - *date = 0; - *author = 0; - *branch = 0; - *ancestor = 0; - *tag = 0; - loglen = 0; - - initial_commit = 0; -} - -static void update_file(char *line) -{ - char *name, *version; - char *dir; - - while (isspace(*line)) - line++; - name = line; - line = strchr(line, ':'); - if (!line) - return; - *line++ = 0; - line = strchr(line, '>'); - if (!line) - return; - *line++ = 0; - version = line; - line = strchr(line, '('); - if (line) { /* "(DEAD)" */ - printf("git-update-cache --force-remove '%s'\n", name); - return; - } - - dir = strrchr(name, '/'); - if (dir) - printf("mkdir -p %.*s\n", (int)(dir - name), name); - - printf("cvs -q -d %s checkout -d .git-tmp -r%s '%s/%s'\n", - cvsroot, version, cvsmodule, name); - printf("mv -f .git-tmp/%s %s\n", dir ? dir+1 : name, name); - printf("rm -rf .git-tmp\n"); - printf("git-update-cache --add -- '%s'\n", name); -} - -struct hdrentry { - const char *name; - char *dest; -} hdrs[] = { - { "Date:", date }, - { "Author:", author }, - { "Branch:", branch }, - { "Ancestor branch:", ancestor }, - { "Tag:", tag }, - { "Log:", NULL }, - { NULL, NULL } -}; - -int main(int argc, char **argv) -{ - static char line[1000]; - enum state state = Header; - int i; - - for (i = 1; i < argc; i++) { - const char *arg = argv[i]; - if (!memcmp(arg, "--cvsroot=", 10)) { - cvsroot = arg + 10; - continue; - } - if (!memcmp(arg, "--module=", 9)) { - cvsmodule = arg+9; - continue; - } - if (!strcmp(arg, "-v")) { - verbose = 1; - continue; - } - if (!strcmp(arg, "-u")) { - initial_commit = 0; - continue; - } - } - - - if (!cvsroot) - cvsroot = getenv("CVSROOT"); - - if (!cvsmodule || !cvsroot) { - fprintf(stderr, "I need a CVSROOT and module name\n"); - exit(1); - } - - if (initial_commit) { - printf("[ -d .git ] && exit 1\n"); - printf("git-init-db\n"); - printf("mkdir -p .git/refs/heads\n"); - printf("mkdir -p .git/refs/tags\n"); - printf("ln -sf refs/heads/master .git/HEAD\n"); - } - - while (fgets(line, sizeof(line), stdin) != NULL) { - int linelen = strlen(line); - - while (linelen && isspace(line[linelen-1])) - line[--linelen] = 0; - - switch (state) { - struct hdrentry *entry; - - case Header: - if (verbose) - printf("# H: %s\n", line); - for (entry = hdrs ; entry->name ; entry++) { - int len = strlen(entry->name); - char *val; - - if (memcmp(entry->name, line, len)) - continue; - if (!entry->dest) { - state = Log; - break; - } - val = line + len; - linelen -= len; - while (isspace(*val)) { - val++; - linelen--; - } - memcpy(entry->dest, val, linelen+1); - break; - } - continue; - - case Log: - if (verbose) - printf("# L: %s\n", line); - if (!strcmp(line, "Members:")) { - while (loglen && isspace(log[loglen-1])) - log[--loglen] = 0; - prepare_commit(); - state = Members; - continue; - } - - if (loglen + linelen + 5 > sizeof(log)) - continue; - memcpy(log + loglen, line, linelen); - loglen += linelen; - log[loglen++] = '\n'; - continue; - - case Members: - if (verbose) - printf("# M: %s\n", line); - if (!linelen) { - commit(); - state = Header; - continue; - } - update_file(line); - continue; - } - } - return 0; -} diff --git a/git-cvsimport-script b/git-cvsimport-script --- a/git-cvsimport-script +++ b/git-cvsimport-script @@ -1,38 +1,629 @@ -#!/bin/sh +#!/usr/bin/perl -w -usage () { - echo "Usage: git cvsimport [-v] [-z fuzz] <cvsroot> <module>" - exit 1 -} - -CVS2GIT="" -CVSPS="--cvs-direct -x -A" -while true; do - case "$1" in - -v) CVS2GIT="$1" ;; - -z) shift; CVSPS="$CVSPS -z $1" ;; - -*) usage ;; - *) break ;; - esac - shift -done - -export CVSROOT="$1" -export MODULE="$2" -if [ ! "$CVSROOT" ] || [ ! "$MODULE" ] ; then - usage -fi - -cvsps -h 2>&1 | grep -q "cvsps version 2.1" >& /dev/null || { - echo "I need cvsps version 2.1" - exit 1 -} - -mkdir "$MODULE" || exit 1 -cd "$MODULE" - -TZ=UTC cvsps $CVSPS $MODULE > .git-cvsps-result -[ -s .git-cvsps-result ] || exit 1 -git-cvs2git $CVS2GIT --cvsroot="$CVSROOT" --module="$MODULE" < .git-cvsps-result > .git-create-script || exit 1 -sh .git-create-script +# This tool is copyright (c) 2005, Matthias Urlichs. +# It is released under the Gnu Public License, version 2. +# +# The basic idea is to aggregate CVS check-ins into related changes. +# Fortunately, "cvsps" does that for us; all we have to do is to parse +# its output. +# +# Checking out the files is done by a single long-running CVS connection +# / server process. +# +# The head revision is on branch "origin" by default. +# You can change that with the '-o' option. + +use strict; +use warnings; +use Getopt::Std; +use File::Path qw(mkpath); +use File::Basename qw(basename dirname); +use Time::Local; +use IO::Socket; +use IO::Pipe; +use POSIX qw(strftime dup2); + +$SIG{'PIPE'}="IGNORE"; +$ENV{'TZ'}="UTC"; + +our($opt_h,$opt_o,$opt_v,$opt_d); + +sub usage() { + print STDERR <<END; +Usage: ${\basename $0} # fetch/update GIT from CVS + [ -o branch-for-HEAD ] [ -h ] [ -v ] [ -d CVSROOT ] + CVS_module [ GIT_repository ] +END + exit(1); +} + +getopts("hqvo:d:") or usage(); +usage if $opt_h; + +@ARGV == 1 or @ARGV == 2 or usage(); + +my($cvs_tree, $git_tree) = @ARGV; + +if($opt_d) { + $ENV{"CVSROOT"} = $opt_d; +} elsif($ENV{"CVSROOT"}) { + $opt_d = $ENV{"CVSROOT"}; +} else { + die "CVSROOT needs to be set"; +} +$opt_o ||= "origin"; +$git_tree ||= "."; + +select(STDERR); $|=1; select(STDOUT); + + +package CVSconn; +# Basic CVS dialog. +# We're only interested in connecting and downloading, so ... + +use POSIX qw(strftime dup2); + +sub new { + my($what,$repo,$subdir) = @_; + $what=ref($what) if ref($what); + + my $self = {}; + $self->{'buffer'} = ""; + bless($self,$what); + + $repo =~ s#/+$##; + $self->{'fullrep'} = $repo; + $self->conn(); + + $self->{'subdir'} = $subdir; + $self->{'lines'} = undef; + + return $self; +} + +sub conn { + my $self = shift; + my $repo = $self->{'fullrep'}; + if($repo =~ s/^:pserver:(?:(.*?)(?::(.*?))?@)?([^:\/]*)(?::(\d*))?//) { + my($user,$pass,$serv,$port) = ($1,$2,$3,$4); + $user="anonymous" unless defined $user; + my $rr2 = "-"; + unless($port) { + $rr2 = ":pserver:$user\@$serv:$repo"; + $port=2401; + } + my $rr = ":pserver:$user\@$serv:$port$repo"; + + unless($pass) { + open(H,$ENV{'HOME'}."/.cvspass") and do { + # :pserver:cvs@mea.tmt.tele.fi:/cvsroot/zmailer Ah<Z + while(<H>) { + chomp; + s/^\/\d+\s+//; + my ($w,$p) = split(/\s/,$_,2); + if($w eq $rr or $w eq $rr2) { + $pass = $p; + last; + } + } + }; + } + $pass="A" unless $pass; + + my $s = IO::Socket::INET->new(PeerHost => $serv, PeerPort => $port); + die "Socket to $serv: $!\n" unless defined $s; + $s->write("BEGIN AUTH REQUEST\n$repo\n$user\n$pass\nEND AUTH REQUEST\n") + or die "Write to $serv: $!\n"; + $s->flush(); + + my $rep = <$s>; + + if($rep ne "I LOVE YOU\n") { + $rep="<unknown>" unless $rep; + die "AuthReply: $rep\n"; + } + $self->{'socketo'} = $s; + $self->{'socketi'} = $s; + } else { # local: Fork off our own cvs server. + my $pr = IO::Pipe->new(); + my $pw = IO::Pipe->new(); + my $pid = fork(); + die "Fork: $!\n" unless defined $pid; + unless($pid) { + $pr->writer(); + $pw->reader(); + dup2($pw->fileno(),0); + dup2($pr->fileno(),1); + $pr->close(); + $pw->close(); + exec("cvs","server"); + } + $pw->writer(); + $pr->reader(); + $self->{'socketo'} = $pw; + $self->{'socketi'} = $pr; + } + $self->{'socketo'}->write("Root $repo\n"); + + # Trial and error says that this probably is the minimum set + $self->{'socketo'}->write("Valid-responses ok error Valid-requests Mode M Mbinary E F Checked-in Created Updated Merged Removed\n"); + + $self->{'socketo'}->write("valid-requests\n"); + $self->{'socketo'}->flush(); + + chomp(my $rep=$self->readline()); + if($rep !~ s/^Valid-requests\s*//) { + $rep="<unknown>" unless $rep; + die "Expected Valid-requests from server, but got: $rep\n"; + } + chomp(my $res=$self->readline()); + die "validReply: $res\n" if $res ne "ok"; + + $self->{'socketo'}->write("UseUnchanged\n") if $rep =~ /\bUseUnchanged\b/; + $self->{'repo'} = $repo; +} + +sub readline { + my($self) = @_; + return $self->{'socketi'}->getline(); +} + +sub _file { + # Request a file with a given revision. + # Trial and error says this is a good way to do it. :-/ + my($self,$fn,$rev) = @_; + $self->{'socketo'}->write("Argument -N\n") or return undef; + $self->{'socketo'}->write("Argument -P\n") or return undef; + # $self->{'socketo'}->write("Argument -ko\n") or return undef; + # -ko: Linus' version doesn't use it + $self->{'socketo'}->write("Argument -r\n") or return undef; + $self->{'socketo'}->write("Argument $rev\n") or return undef; + $self->{'socketo'}->write("Argument --\n") or return undef; + $self->{'socketo'}->write("Argument $self->{'subdir'}/$fn\n") or return undef; + $self->{'socketo'}->write("Directory .\n") or return undef; + $self->{'socketo'}->write("$self->{'repo'}\n") or return undef; + $self->{'socketo'}->write("Sticky T1.1\n") or return undef; + $self->{'socketo'}->write("co\n") or return undef; + $self->{'socketo'}->flush() or return undef; + $self->{'lines'} = 0; + return 1; +} +sub _line { + # Read a line from the server. + # ... except that 'line' may be an entire file. ;-) + my($self) = @_; + die "Not in lines" unless defined $self->{'lines'}; + + my $line; + my $res=""; + while(defined($line = $self->readline())) { + # M U gnupg-cvs-rep/AUTHORS + # Updated gnupg-cvs-rep/ + # /daten/src/rsync/gnupg-cvs-rep/AUTHORS + # /AUTHORS/1.1///T1.1 + # u=rw,g=rw,o=rw + # 0 + # ok + + if($line =~ s/^(?:Created|Updated) //) { + $line = $self->readline(); # path + $line = $self->readline(); # Entries line + my $mode = $self->readline(); chomp $mode; + $self->{'mode'} = $mode; + defined (my $cnt = $self->readline()) + or die "EOF from server after 'Changed'\n"; + chomp $cnt; + die "Duh: Filesize $cnt" if $cnt !~ /^\d+$/; + $line=""; + $res=""; + while($cnt) { + my $buf; + my $num = $self->{'socketi'}->read($buf,$cnt); + die "Server: Filesize $cnt: $num: $!\n" if not defined $num or $num<=0; + $res .= $buf; + $cnt -= $num; + } + } elsif($line =~ s/^ //) { + $res .= $line; + } elsif($line =~ /^M\b/) { + # output, do nothing + } elsif($line =~ /^Mbinary\b/) { + my $cnt; + die "EOF from server after 'Mbinary'" unless defined ($cnt = $self->readline()); + chomp $cnt; + die "Duh: Mbinary $cnt" if $cnt !~ /^\d+$/ or $cnt<1; + $line=""; + while($cnt) { + my $buf; + my $num = $self->{'socketi'}->read($buf,$cnt); + die "S: Mbinary $cnt: $num: $!\n" if not defined $num or $num<=0; + $res .= $buf; + $cnt -= $num; + } + } else { + chomp $line; + if($line eq "ok") { + # print STDERR "S: ok (".length($res).")\n"; + return $res; + } elsif($line =~ s/^E //) { + # print STDERR "S: $line\n"; + } else { + die "Unknown: $line\n"; + } + } + } +} +sub file { + my($self,$fn,$rev) = @_; + my $res; + + if ($self->_file($fn,$rev)) { + $res = $self->_line(); + return $res if defined $res; + } + + # retry + $self->conn(); + $self->_file($fn,$rev) + or die "No file command send\n"; + $res = $self->_line(); + die "No input: $fn $rev\n" unless defined $res; + return $res; +} + + +package main; + +my $cvs = CVSconn->new($opt_d, $cvs_tree); + + +sub pdate($) { + my($d) = @_; + m#(\d{2,4})/(\d\d)/(\d\d)\s(\d\d):(\d\d)(?::(\d\d))?# + or die "Unparseable date: $d\n"; + my $y=$1; $y-=1900 if $y>1900; + return timegm($6||0,$5,$4,$3,$2-1,$y); +} + +sub pmode($) { + my($mode) = @_; + my $m = 0; + my $mm = 0; + my $um = 0; + for my $x(split(//,$mode)) { + if($x eq ",") { + $m |= $mm&$um; + $mm = 0; + $um = 0; + } elsif($x eq "u") { $um |= 0700; + } elsif($x eq "g") { $um |= 0070; + } elsif($x eq "o") { $um |= 0007; + } elsif($x eq "r") { $mm |= 0444; + } elsif($x eq "w") { $mm |= 0222; + } elsif($x eq "x") { $mm |= 0111; + } elsif($x eq "=") { # do nothing + } else { die "Unknown mode: $mode\n"; + } + } + $m |= $mm&$um; + return $m; +} + +my $tmpcv = "/var/cache/cvs"; + +sub getwd() { + my $pwd = `pwd`; + chomp $pwd; + return $pwd; +} + +-d $git_tree + or mkdir($git_tree,0777) + or die "Could not create $git_tree: $!"; +chdir($git_tree); + +my $last_branch = ""; +my $orig_branch = ""; +my %branch_date; + +my $git_dir = $ENV{"GIT_DIR"} || ".git"; +$git_dir = getwd()."/".$git_dir unless $git_dir =~ m#^/#; +$ENV{"GIT_DIR"} = $git_dir; +unless(-d $git_dir) { + system("git-init-db"); + die "Cannot init the GIT db at $git_tree: $?\n" if $?; + system("git-read-tree"); + die "Cannot init an empty tree: $?\n" if $?; + + $last_branch = $opt_o; + $orig_branch = ""; +} else { + $last_branch = basename(readlink("$git_dir/HEAD")); + unless($last_branch) { + warn "Cannot read the last branch name: $! -- assuming 'master'\n"; + $last_branch = "master"; + } + $orig_branch = $last_branch; + + # Get the last import timestamps + opendir(D,"$git_dir/refs/heads"); + while(defined(my $head = readdir(D))) { + next if $head =~ /^\./; + open(F,"$git_dir/refs/heads/$head") + or die "Bad head branch: $head: $!\n"; + chomp(my $ftag = <F>); + close(F); + open(F,"git-cat-file commit $ftag |"); + while(<F>) { + next unless /^author\s.*\s(\d+)\s[-+]\d{4}$/; + $branch_date{$head} = $1; + last; + } + close(F); + } + closedir(D); +} + +-d $git_dir + or die "Could not create git subdir ($git_dir).\n"; + +my $pid = open(CVS,"-|"); +die "Cannot fork: $!\n" unless defined $pid; +unless($pid) { + exec("cvsps","-A","--cvs-direct",$cvs_tree); + die "Could not start cvsps: $!\n"; +} + + +## cvsps output: +#--------------------- +#PatchSet 314 +#Date: 1999/09/18 13:03:59 +#Author: wkoch +#Branch: STABLE-BRANCH-1-0 +#Ancestor branch: HEAD +#Tag: (none) +#Log: +# See ChangeLog: Sat Sep 18 13:03:28 CEST 1999 Werner Koch +#Members: +# README:1.57->1.57.2.1 +# VERSION:1.96->1.96.2.1 +# +#--------------------- + +my $state = 0; + +my($patchset,$date,$author,$branch,$ancestor,$tag,$logmsg); +my(@old,@new); +my $commit = sub { + my $pid; + system("git-update-cache","--force-remove","--",@old) if @old; + die "Cannot remove files: $?\n" if $?; + system("git-update-cache","--add","--",@new) if @new; + die "Cannot add files: $?\n" if $?; + + $pid = open(C,"-|"); + die "Cannot fork: $!" unless defined $pid; + unless($pid) { + exec("git-write-tree"); + die "Cannot exec git-write-tree: $!\n"; + } + chomp(my $tree = <C>); + length($tree) == 40 + or die "Cannot get tree id ($tree): $!\n"; + close(C) + or die "Error running git-write-tree: $?\n"; + print "Tree ID $tree\n" if $opt_v; + + my $parent = ""; + if(open(C,"$git_dir/refs/heads/$last_branch")) { + chomp($parent = <C>); + close(C); + length($parent) == 40 + or die "Cannot get parent id ($parent): $!\n"; + print "Parent ID $parent\n" if $opt_v; + } + + my $pr = IO::Pipe->new(); + my $pw = IO::Pipe->new(); + $pid = fork(); + die "Fork: $!\n" unless defined $pid; + unless($pid) { + $pr->writer(); + $pw->reader(); + dup2($pw->fileno(),0); + dup2($pr->fileno(),1); + $pr->close(); + $pw->close(); + + my @par = (); + @par = ("-p",$parent) if $parent; + exec("env", + "GIT_AUTHOR_NAME=$author", + "GIT_AUTHOR_EMAIL=$author", + "GIT_AUTHOR_DATE=".strftime("+0000 %Y-%m-%d %H:%M:%S",gmtime($date)), + "GIT_COMMITTER_NAME=$author", + "GIT_COMMITTER_EMAIL=$author", + "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(); + print $pw $logmsg + or die "Error writing to git-commit-tree: $!\n"; + $pw->close(); + + print "Committed patch $patchset ($branch)\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 $?; + + open(C,">$git_dir/refs/heads/$branch") + or die "Cannot open branch $branch for update: $!\n"; + print C "$cid\n" + or die "Cannot write branch $branch for update: $!\n"; + close(C) + or die "Cannot write branch $branch for update: $!\n"; + + if($tag) { + open(C,">$git_dir/refs/tags/$tag") + or die "Cannot create tag $tag: $!\n"; + print C "$cid\n" + or die "Cannot write tag $branch: $!\n"; + close(C) + or die "Cannot write tag $branch: $!\n"; + print "Created tag '$tag' on '$branch'\n" if $opt_v; + } + + @old = (); + @new = (); +}; + +while(<CVS>) { + chomp; + if($state == 0 and /^-+$/) { + $state = 1; + } elsif($state == 0) { + $state = 1; + redo; + } elsif(($state==0 or $state==1) and s/^PatchSet\s+//) { + $patchset = 0+$_; + $state=2; + } elsif($state == 2 and s/^Date:\s+//) { + $date = pdate($_); + unless($date) { + print STDERR "Could not parse date: $_\n"; + $state=0; + next; + } + $state=3; + } elsif($state == 3 and s/^Author:\s+//) { + s/\s+$//; + $author = $_; + $state = 4; + } elsif($state == 4 and s/^Branch:\s+//) { + s/\s+$//; + $branch = $_; + $state = 5; + } elsif($state == 5 and s/^Ancestor branch:\s+//) { + s/\s+$//; + $ancestor = $_; + $ancestor = $opt_o if $ancestor == "HEAD"; + $state = 6; + } elsif($state == 5) { + $ancestor = undef; + $state = 6; + redo; + } elsif($state == 6 and s/^Tag:\s+//) { + s/\s+$//; + if($_ eq "(none)") { + $tag = undef; + } else { + $tag = $_; + } + $state = 7; + } elsif($state == 7 and /^Log:/) { + $logmsg = ""; + $state = 8; + } elsif($state == 8 and /^Members:/) { + $branch = $opt_o if $branch eq "HEAD"; + if(defined $branch_date{$branch} and $branch_date{$branch} >= $date) { + # skip + print "skip patchset $patchset: $date before $branch_date{$branch}\n"; + $state = 11; + next; + } + if($ancestor) { + if(-f "$git_dir/refs/heads/$branch") { + print STDERR "Branch $branch already exists!\n"; + $state=11; + next; + } + unless(open(H,"$git_dir/refs/heads/$ancestor")) { + print STDERR "Branch $ancestor does not exist!\n"; + $state=11; + next; + } + chomp(my $id = <H>); + close(H); + unless(open(H,"> $git_dir/refs/heads/$branch")) { + print STDERR "Could not create branch $branch: $!\n"; + $state=11; + next; + } + print H "$id\n" + or die "Could not write branch $branch: $!"; + close(H) + or die "Could not write branch $branch: $!"; + } + if(($ancestor || $branch) ne $last_branch) { + print "Switching from $last_branch to $branch\n" if $opt_v; + system("git-read-tree","-m","-u","$last_branch","$branch"); + die "read-tree failed: $?\n" if $?; + } + if($branch ne $last_branch) { + unlink("$git_dir/HEAD"); + symlink("refs/heads/$branch","$git_dir/HEAD"); + $last_branch = $branch; + } + $state = 9; + } elsif($state == 8) { + $logmsg .= "$_\n"; + } elsif($state == 9 and /^\s+(\S+):(INITIAL|\d(?:\.\d+)+)->(\d(?:\.\d+)+)\s*$/) { +# VERSION:1.96->1.96.2.1 + my $init = ($2 eq "INITIAL"); + my $fn = $1; + my $rev = $3; + $fn =~ s#^/+##; + my $data = $cvs->file($fn,$rev); + print "".($init ? "New" : "Update")." $fn: ".length($data)." bytes.\n"; + mkpath(dirname($fn),$opt_v); + open(F,"> ./$fn") + or die "Cannot create '$fn': $!\n"; + print F $data + or die "Cannot write to '$fn': $!\n"; + close(F) + or die "Cannot write to '$fn': $!\n"; + chmod(pmode($cvs->{'mode'}), $fn); + push(@new,$fn); # may be resurrected! + } elsif($state == 9 and /^\s+(\S+):\d(?:\.\d+)+->(\d(?:\.\d+)+)\(DEAD\)\s*$/) { + my $fn = $1; + $fn =~ s#^/+##; + push(@old,$fn); + } elsif($state == 9 and /^\s*$/) { + $state = 10; + } elsif(($state == 9 or $state == 10) and /^-+$/) { + &$commit(); + $state = 1; + } elsif($state == 11 and /^-+$/) { + $state = 1; + } elsif(/^-+$/) { # end of unknown-line processing + $state = 1; + } elsif($state != 11) { # ignore stuff when skipping + print "* UNKNOWN LINE * $_\n"; + } +} +&$commit() if $branch and $state != 11; + +# Now switch back to the branch we were in before all of this happened +if($orig_branch) { + print "DONE; switching back to $orig_branch\n" if $opt_v; +} 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 "$git_dir/refs/heads/master"; +} + +system("git-read-tree","-m","-u","$last_branch","$orig_branch"); +die "read-tree failed: $?\n" if $?; + +unlink("$git_dir/HEAD"); +symlink("refs/heads/$orig_branch","$git_dir/HEAD");