# -*- 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 strict;
use warnings;
+use Carp;
use POSIX;
use IO::Handle;
use Config;
+use Digest::SHA;
+use Data::Dumper;
+use IPC::Open2;
BEGIN {
use Exporter ();
$VERSION = 1.00;
@ISA = qw(Exporter);
@EXPORT = qw(setup_sigwarn
- debiantag server_branch server_ref
- stat_exists fail ensuredir waitstatusmsg failedcmd
+ dep14_version_mangle
+ debiantags debiantag_old debiantag_new
+ server_branch server_ref
+ stat_exists link_ltarget
+ hashfile
+ fail ensuredir executable_on_path
+ waitstatusmsg failedcmd_waitstatus
+ failedcmd_report_cmd failedcmd
cmdoutput cmdoutput_errok
- git_rev_parse git_get_ref git_for_each_ref
+ 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
$branchprefix
initdebug enabledebug enabledebuglevel
printdebug debugcmd
$debugprefix *debuglevel *DEBUG
shellquote printcmd messagequote);
# 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';
# policy hook exit status bits
# 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;
local $_;
foreach my $a (@_) {
$_ = $a;
- if (!length || m{[^-=_./0-9a-z]}i) {
+ if (!length || m{[^-=_./:0-9a-z]}i) {
s{['\\]}{'\\$&'}g;
push @out, "'$_'";
} else {
printcmd(\*DEBUG,$debugprefix.$extraprefix,@_) if $debuglevel>0;
}
-sub debiantag ($$) {
- my ($v,$distro) = @_;
+sub dep14_version_mangle ($) {
+ my ($v) = @_;
+ # DEP-14 patch proposed 2016-11-09 "Version Mangling"
$v =~ y/~:/_%/;
- return "$distro/$v";
+ $v =~ s/\.(?=\.|$|lock$)/.#/g;
+ return $v;
+}
+
+sub debiantag_old ($$) {
+ my ($v,$distro) = @_;
+ 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;
die "mkdir $dir: $!";
}
+sub executable_on_path ($) {
+ my ($program) = @_;
+ return 1 if $program =~ m{/};
+ my @path = split /:/, ($ENV{PATH} // "/usr/local/bin:/bin:/usr/bin");
+ foreach my $pe (@path) {
+ my $here = "$pe/$program";
+ return $here if stat_exists $here && -x _;
+ }
+ return undef;
+}
+
our @signames = split / /, $Config{sig_name};
sub waitstatusmsg () {
}
}
-sub failedcmd {
- { local ($!); printcmd \*STDERR, _us().": failed command:", @_ or die $!; };
- if ($!) {
- fail "failed to fork/exec: $!";
+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: $!";
} elsif ($?) {
- fail "subprocess ".waitstatusmsg();
+ return "subprocess ".waitstatusmsg();
} else {
- fail "subprocess produced invalid output";
+ return "subprocess produced invalid output";
}
}
+sub failedcmd {
+ # Expects $!,$? as set by close - see below.
+ # To use with system(), set $?=-1 first.
+ #
+ # Actual behaviour of perl operations:
+ # success $!==0 $?==0 close of piped open
+ # program failed $!==0 $? >0 close of piped open
+ # syscall failure $! >0 $?=-1 close of piped open
+ # failure $! >0 unchanged close of something else
+ # success trashed $?==0 system
+ # program failed trashed $? >0 system
+ # syscall failure $! >0 unchanged system
+ failedcmd_report_cmd undef, @_;
+ fail failedcmd_waitstatus();
+}
+
sub cmdoutput_errok {
- die Dumper(\@_)." ?" if grep { !defined } @_;
+ confess Dumper(\@_)." ?" if grep { !defined } @_;
debugcmd "|",@_;
- open P, "-|", @_ or die $!;
+ open P, "-|", @_ or die "$_[0] $!";
my $d;
$!=0; $?=0;
{ local $/ = undef; $d = <P>; }
return $d;
}
+sub link_ltarget ($$) {
+ my ($old,$new) = @_;
+ lstat $old or return undef;
+ if (-l _) {
+ $old = cmdoutput qw(realpath --), $old;
+ }
+ my $r = link $old, $new;
+ $r = symlink $old, $new if !$r && $!==EXDEV;
+ $r or die "(sym)link $old $new: $!";
+}
+
+sub hashfile ($) {
+ my ($fn) = @_;
+ my $h = Digest::SHA->new(256);
+ $h->addfile($fn);
+ return $h->hexdigest();
+}
+
sub git_rev_parse ($) {
return cmdoutput qw(git rev-parse), "$_[0]~0";
}
+sub git_cat_file ($) {
+ my ($objname) = @_;
+ # => ($type, $data) or ('missing', undef)
+ # in scalar context, just the data
+ our ($gcf_pid, $gcf_i, $gcf_o);
+ if (!$gcf_pid) {
+ my @cmd = qw(git cat-file --batch);
+ debugcmd "GCF|", @cmd;
+ $gcf_pid = open2 $gcf_o, $gcf_i, @cmd or die $!;
+ }
+ printdebug "GCF>| ", $objname, "\n";
+ print $gcf_i $objname, "\n" or die $!;
+ my $x = <$gcf_o>;
+ printdebug "GCF<| ", $x;
+ if ($x =~ m/ (missing)$/) { return ($1, undef); }
+ my ($type, $size) = $x =~ m/^.* (\w+) (\d+)\n/ or die "$objname ?";
+ my $data;
+ (read $gcf_o, $data, $size) == $size or die "$objname $!";
+ $x = <$gcf_o>;
+ $x eq "\n" or die "$objname ($_) $!";
+ return ($type, $data);
+}
+
sub git_for_each_ref ($$;$) {
my ($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);
}
~ianmdlvl / dgit.git / blobdiff