X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=dgit.git;a=blobdiff_plain;f=Debian%2FDgit.pm;h=57ae99418a1fc79bc4e734d15b18a36f09b5f529;hp=48aae188560ddc825351b2cd09d0d8cebc0e475d;hb=dc204aadf2b4afa84fd002597041fc9e5b981d83;hpb=33757ceaca394c2af95930775ee8ca1fd55108cf
diff --git a/Debian/Dgit.pm b/Debian/Dgit.pm
index 48aae188..57ae9941 100644
--- a/Debian/Dgit.pm
+++ b/Debian/Dgit.pm
@@ -1,13 +1,33 @@
# -*- 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 .
package Debian::Dgit;
use strict;
use warnings;
+use Carp;
use POSIX;
use IO::Handle;
use Config;
+use Digest::SHA;
+use Data::Dumper;
BEGIN {
use Exporter ();
@@ -15,8 +35,14 @@ BEGIN {
$VERSION = 1.00;
@ISA = qw(Exporter);
- @EXPORT = qw(debiantag server_branch server_ref
- stat_exists fail ensuredir waitstatusmsg failedcmd
+ @EXPORT = qw(setup_sigwarn
+ 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_for_each_tag_referring is_fast_fwd
@@ -25,7 +51,7 @@ BEGIN {
initdebug enabledebug enabledebuglevel
printdebug debugcmd
$debugprefix *debuglevel *DEBUG
- shellquote printcmd);
+ shellquote printcmd messagequote);
# implicitly uses $main::us
%EXPORT_TAGS = ( policyflags => [qw(NOFFCHECK FRESHREPO)] );
@EXPORT_OK = @{ $EXPORT_TAGS{policyflags} };
@@ -48,6 +74,13 @@ sub FRESHREPO () { return 0x4; }
our $debugprefix;
our $debuglevel = 0;
+sub setup_sigwarn () {
+ our $sigwarn_mainprocess = $$;
+ $SIG{__WARN__} = sub {
+ die $_[0] unless getppid == $sigwarn_mainprocess;
+ };
+}
+
sub initdebug ($) {
($debugprefix) = @_;
open DEBUG, ">/dev/null" or die $!;
@@ -73,12 +106,22 @@ sub printdebug {
print DEBUG $debugprefix, @_ or die $! if $debuglevel>0;
}
+sub messagequote ($) {
+ local ($_) = @_;
+ s{\\}{\\\\}g;
+ s{\n}{\\n}g;
+ s{\x08}{\\b}g;
+ s{\t}{\\t}g;
+ s{[\000-\037\177]}{ sprintf "\\x%02x", ord $& }ge;
+ $_;
+}
+
sub shellquote {
my @out;
local $_;
foreach my $a (@_) {
$_ = $a;
- if (!length || m{[^-=_./0-9a-z]}i) {
+ if (!length || m{[^-=_./:0-9a-z]}i) {
s{['\\]}{'\\$&'}g;
push @out, "'$_'";
} else {
@@ -101,10 +144,21 @@ sub debugcmd {
printcmd(\*DEBUG,$debugprefix.$extraprefix,@_) if $debuglevel>0;
}
-sub debiantag ($) {
- my ($v) = @_;
+sub debiantag_old ($$) {
+ my ($v,$distro) = @_;
+ $v =~ y/~:/_%/;
+ return "$distro/$v";
+}
+
+sub debiantag_new ($$) {
+ my ($v,$distro) = @_;
$v =~ y/~:/_%/;
- return "debian/$v";
+ return "archive/$distro/$v";
+}
+
+sub debiantags ($$) {
+ my ($version,$distro) = @_;
+ map { $_->($version, $distro) } (\&debiantag_new, \&debiantag_old);
}
sub server_branch ($) { return "$branchprefix/$_[0]"; }
@@ -123,6 +177,7 @@ sub _us () {
sub fail {
my $s = "@_\n";
+ $s =~ s/\n\n$/\n/;
my $prefix = _us().": ";
$s =~ s/^/$prefix/gm;
die $s;
@@ -135,6 +190,17 @@ sub ensuredir ($) {
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 / /, $Config{sig_name};
sub waitstatusmsg () {
@@ -152,29 +218,55 @@ sub waitstatusmsg () {
}
}
-sub failedcmd {
- { local ($!); 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 = ; }
die $! if P->error;
if (!close P) { printdebug "=>!$?\n"; return undef; }
chomp $d;
- $d =~ m/^.*/;
- printdebug "=> \`$&'",(length $' ? '...' : ''),"\n" if $debuglevel>0; #';
+ if ($debuglevel > 0) {
+ $d =~ m/^.*/;
+ my $dd = $&;
+ my $more = (length $' ? '...' : ''); #');
+ $dd =~ s{[^\n -~]|\\}{ sprintf "\\x%02x", ord $& }ge;
+ printdebug "=> \`$dd'",$more,"\n";
+ }
return $d;
}
@@ -184,6 +276,22 @@ sub cmdoutput {
return $d;
}
+sub link_ltarget ($$) {
+ my ($old,$new) = @_;
+ lstat $old or return undef;
+ if (-l _) {
+ $old = cmdoutput qw(realpath --), $old;
+ }
+ link $old, $new or die "link $old $new: $!";
+}
+
+sub hashfile ($) {
+ my ($fn) = @_;
+ my $h = Digest::SHA->new(256);
+ $h->addfile($fn);
+ return $h->hexdigest();
+}
+
sub git_rev_parse ($) {
return cmdoutput qw(git rev-parse), "$_[0]~0";
}
@@ -193,7 +301,9 @@ sub git_for_each_ref ($$;$) {
# 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);
}
@@ -211,7 +321,7 @@ sub git_for_each_ref ($$;$) {
sub git_get_ref ($) {
# => '' if no such ref
my ($refname) = @_;
- my $_ = $refname;
+ local $_ = $refname;
s{^refs/}{[r]efs/} or die "$refname $_ ?";
return cmdoutput qw(git for-each-ref --format=%(objectname)), $_;
}