# -*- perl -*-
+# dgit
+# Debian::Dgit: functions common to dgit and its helpers and servers
+#
+# Copyright (C) 2015-2016 Ian Jackson
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
package Debian::Dgit;
use Config;
use Digest::SHA;
use Data::Dumper;
+use IPC::Open2;
+use File::Path;
BEGIN {
use Exporter ();
$VERSION = 1.00;
@ISA = qw(Exporter);
- @EXPORT = qw(setup_sigwarn
- debiantag_old server_branch server_ref
+ @EXPORT = qw(setup_sigwarn forkcheck_setup forkcheck_mainprocess
+ dep14_version_mangle
+ debiantags debiantag_old debiantag_new
+ server_branch server_ref
stat_exists link_ltarget
hashfile
fail ensuredir executable_on_path
- waitstatusmsg failedcmd
- cmdoutput cmdoutput_errok
- git_rev_parse git_get_ref git_for_each_ref
+ waitstatusmsg failedcmd_waitstatus
+ failedcmd_report_cmd failedcmd
+ runcmd cmdoutput cmdoutput_errok
+ git_rev_parse git_cat_file
+ git_get_ref git_for_each_ref
git_for_each_tag_referring is_fast_fwd
$package_re $component_re $deliberately_re
+ $distro_re $versiontag_re $series_filename_re
$branchprefix
initdebug enabledebug enabledebuglevel
printdebug debugcmd
$debugprefix *debuglevel *DEBUG
- shellquote printcmd messagequote);
+ shellquote printcmd messagequote
+ $negate_harmful_gitattrs
+ git_slurp_config_src
+ workarea_setup);
# implicitly uses $main::us
- %EXPORT_TAGS = ( policyflags => [qw(NOFFCHECK FRESHREPO)] );
+ %EXPORT_TAGS = ( policyflags => [qw(NOFFCHECK FRESHREPO NOCOMMITCHECK)] );
@EXPORT_OK = @{ $EXPORT_TAGS{policyflags} };
}
our $package_re = '[0-9a-z][-+.0-9a-z]*';
our $component_re = '[0-9a-zA-Z][-+.0-9a-zA-Z]*';
our $deliberately_re = "(?:TEST-)?$package_re";
+our $distro_re = $component_re;
+our $versiontag_re = qr{[-+.\%_0-9a-zA-Z/]+};
our $branchprefix = 'dgit';
+our $series_filename_re = qr{(?:^|\.)series(?!\n)$}s;
# policy hook exit status bits
# see dgit-repos-server head comment for documentation
# dynamic loader, runtime, etc., failures, which report 127 or 255
sub NOFFCHECK () { return 0x2; }
sub FRESHREPO () { return 0x4; }
+sub NOCOMMITCHECK () { return 0x8; }
our $debugprefix;
our $debuglevel = 0;
+our $negate_harmful_gitattrs = "-text -eol -crlf -ident -filter";
+
+our $forkcheck_mainprocess;
+
+sub forkcheck_setup () {
+ $forkcheck_mainprocess = $$;
+}
+
+sub forkcheck_mainprocess () {
+ # You must have called forkcheck_setup or setup_sigwarn already
+ getppid != $forkcheck_mainprocess;
+}
+
sub setup_sigwarn () {
- our $sigwarn_mainprocess = $$;
+ forkcheck_setup();
$SIG{__WARN__} = sub {
- die $_[0] unless getppid == $sigwarn_mainprocess;
+ die $_[0] if forkcheck_mainprocess;
};
}
sub shellquote {
my @out;
local $_;
+ defined or confess 'internal error' foreach @_;
foreach my $a (@_) {
$_ = $a;
if (!length || m{[^-=_./:0-9a-z]}i) {
printcmd(\*DEBUG,$debugprefix.$extraprefix,@_) if $debuglevel>0;
}
+sub dep14_version_mangle ($) {
+ my ($v) = @_;
+ # DEP-14 patch proposed 2016-11-09 "Version Mangling"
+ $v =~ y/~:/_%/;
+ $v =~ s/\.(?=\.|$|lock$)/.#/g;
+ return $v;
+}
+
sub debiantag_old ($$) {
my ($v,$distro) = @_;
- $v =~ y/~:/_%/;
- return "$distro/$v";
+ return "$distro/". dep14_version_mangle $v;
+}
+
+sub debiantag_new ($$) {
+ my ($v,$distro) = @_;
+ return "archive/$distro/".dep14_version_mangle $v;
+}
+
+sub debiantags ($$) {
+ my ($version,$distro) = @_;
+ map { $_->($version, $distro) } (\&debiantag_new, \&debiantag_old);
}
sub server_branch ($) { return "$branchprefix/$_[0]"; }
sub fail {
my $s = "@_\n";
+ $s =~ s/\n\n$/\n/;
my $prefix = _us().": ";
$s =~ s/^/$prefix/gm;
die $s;
}
}
+sub failedcmd_report_cmd {
+ my $intro = shift @_;
+ $intro //= "failed command";
+ { local ($!); printcmd \*STDERR, _us().": $intro:", @_ or die $!; };
+}
+
+sub failedcmd_waitstatus {
+ if ($? < 0) {
+ return "failed to fork/exec: $!";
+ } elsif ($?) {
+ return "subprocess ".waitstatusmsg();
+ } else {
+ return "subprocess produced invalid output";
+ }
+}
+
sub failedcmd {
# Expects $!,$? as set by close - see below.
# To use with system(), set $?=-1 first.
# success trashed $?==0 system
# program failed trashed $? >0 system
# syscall failure $! >0 unchanged system
- { local ($!); printcmd \*STDERR, _us().": failed command:", @_ or die $!; };
- if ($? < 0) {
- fail "failed to fork/exec: $!";
- } elsif ($?) {
- fail "subprocess ".waitstatusmsg();
- } else {
- fail "subprocess produced invalid output";
- }
+ failedcmd_report_cmd undef, @_;
+ fail failedcmd_waitstatus();
+}
+
+sub runcmd {
+ debugcmd "+",@_;
+ $!=0; $?=-1;
+ failedcmd @_ if system @_;
}
sub cmdoutput_errok {
if (-l _) {
$old = cmdoutput qw(realpath --), $old;
}
- link $old, $new or die "link $old $new: $!";
+ my $r = link $old, $new;
+ $r = symlink $old, $new if !$r && $!==EXDEV;
+ $r or die "(sym)link $old $new: $!";
}
sub hashfile ($) {
return cmdoutput qw(git rev-parse), "$_[0]~0";
}
+sub git_cat_file ($) {
+ my ($objname) = @_;
+ # => ($type, $data) or ('missing', undef)
+ # in scalar context, just the data
+ our ($gcf_pid, $gcf_i, $gcf_o);
+ if (!$gcf_pid) {
+ my @cmd = qw(git cat-file --batch);
+ debugcmd "GCF|", @cmd;
+ $gcf_pid = open2 $gcf_o, $gcf_i, @cmd or die $!;
+ }
+ printdebug "GCF>| ", $objname, "\n";
+ print $gcf_i $objname, "\n" or die $!;
+ my $x = <$gcf_o>;
+ printdebug "GCF<| ", $x;
+ if ($x =~ m/ (missing)$/) { return ($1, undef); }
+ my ($type, $size) = $x =~ m/^.* (\w+) (\d+)\n/ or die "$objname ?";
+ my $data;
+ (read $gcf_o, $data, $size) == $size or die "$objname $!";
+ $x = <$gcf_o>;
+ $x eq "\n" or die "$objname ($_) $!";
+ return ($type, $data);
+}
+
sub git_for_each_ref ($$;$) {
my ($pattern,$func,$gitdir) = @_;
# calls $func->($objid,$objtype,$fullrefname,$reftail);
# $reftail is RHS of ref after refs/[^/]+/
# breaks if $pattern matches any ref `refs/blah' where blah has no `/'
- my @cmd = (qw(git for-each-ref), $pattern);
+ # $pattern may be an array ref to mean multiple patterns
+ $pattern = [ $pattern ] unless ref $pattern;
+ my @cmd = (qw(git for-each-ref), @$pattern);
if (defined $gitdir) {
@cmd = ('sh','-ec','cd "$1"; shift; exec "$@"','x', $gitdir, @cmd);
}
}
}
+sub git_slurp_config_src ($) {
+ my ($src) = @_;
+ # returns $r such that $r->{KEY}[] = VALUE
+ my @cmd = (qw(git config -z --get-regexp), "--$src", qw(.*));
+ debugcmd "|",@cmd;
+
+ local ($debuglevel) = $debuglevel-2;
+ local $/="\0";
+
+ my $r = { };
+ open GITS, "-|", @cmd or die $!;
+ while (<GITS>) {
+ chomp or die;
+ printdebug "=> ", (messagequote $_), "\n";
+ m/\n/ or die "$_ ?";
+ push @{ $r->{$`} }, $'; #';
+ }
+ $!=0; $?=0;
+ close GITS
+ or ($!==0 && $?==256)
+ or failedcmd @cmd;
+ return $r;
+}
+
+sub workarea_setup ($) {
+ # for use in the workarea
+ my ($t_local_git_cfg) = @_;
+ # should be run in a directory .git/FOO/BAR of a working tree
+ runcmd qw(git init -q);
+ runcmd qw(git config gc.auto 0);
+ foreach my $copy (qw(user.email user.name user.useConfigOnly
+ core.sharedRepository
+ core.compression core.looseCompression
+ core.bigFileThreshold core.fsyncObjectFiles)) {
+ my $v = $t_local_git_cfg->{$copy};
+ next unless $v;
+ runcmd qw(git config), $copy, $_ foreach @$v;
+ }
+ rmtree('.git/objects');
+ symlink '../../../../objects','.git/objects' or die $!;
+ ensuredir '.git/info';
+ open GA, "> .git/info/attributes" or die $!;
+ print GA "* $negate_harmful_gitattrs\n" or die $!;
+ close GA or die $!;
+}
+
1;
~ianmdlvl / dgit.git / blobdiff