X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=Debian%2FDgit.pm;h=edb338ca455a3e9f50405a139518292a1f94931a;hb=0e6a55238ffdee98d5b23c70fe4105c41ea28f34;hp=1ab65a8f24c6fd1da07d25bd03e1916f81f16f4d;hpb=f08a465fb0a346019750c62dd6cdf1eed348e032;p=dgit.git diff --git a/Debian/Dgit.pm b/Debian/Dgit.pm index 1ab65a8f..edb338ca 100644 --- a/Debian/Dgit.pm +++ b/Debian/Dgit.pm @@ -6,6 +6,8 @@ use strict; use warnings; use POSIX; +use IO::Handle; +use Config; BEGIN { use Exporter (); @@ -14,8 +16,17 @@ BEGIN { $VERSION = 1.00; @ISA = qw(Exporter); @EXPORT = qw(debiantag server_branch server_ref - stat_exists git_for_each_ref - $package_re $component_re $branchprefix); + stat_exists fail ensuredir waitstatusmsg failedcmd + cmdoutput cmdoutput_errok + git_rev_parse git_get_ref git_for_each_ref + git_for_each_tag_referring is_fast_fwd + $package_re $component_re $deliberately_re + $branchprefix + initdebug enabledebug enabledebuglevel + printdebug debugcmd + $debugprefix *debuglevel *DEBUG + shellquote printcmd); + # implicitly uses $main::us %EXPORT_TAGS = ( policyflags => [qw(NOFFCHECK FRESHREPO)] ); @EXPORT_OK = @{ $EXPORT_TAGS{policyflags} }; } @@ -24,19 +35,76 @@ our @EXPORT_OK; 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 $branchprefix = 'dgit'; # policy hook exit status bits # see dgit-repos-server head comment for documentation -# 1 is reserved in case something fails with `exit 1' +# 1 is reserved in case something fails with `exit 1' and to spot +# dynamic loader, runtime, etc., failures, which report 127 or 255 sub NOFFCHECK () { return 0x2; } sub FRESHREPO () { return 0x4; } -# 0x80 is reserved -sub debiantag ($) { - my ($v) = @_; +our $debugprefix; +our $debuglevel = 0; + +sub initdebug ($) { + ($debugprefix) = @_; + open DEBUG, ">/dev/null" or die $!; +} + +sub enabledebug () { + open DEBUG, ">&STDERR" or die $!; + DEBUG->autoflush(1); + $debuglevel ||= 1; +} + +sub enabledebuglevel ($) { + my ($newlevel) = @_; # may be undef (eg from env var) + die if $debuglevel; + $newlevel //= 0; + $newlevel += 0; + return unless $newlevel; + $debuglevel = $newlevel; + enabledebug(); +} + +sub printdebug { + print DEBUG $debugprefix, @_ or die $! if $debuglevel>0; +} + +sub shellquote { + my @out; + local $_; + foreach my $a (@_) { + $_ = $a; + if (!length || m{[^-=_./0-9a-z]}i) { + s{['\\]}{'\\$&'}g; + push @out, "'$_'"; + } else { + push @out, $_; + } + } + return join ' ', @out; +} + +sub printcmd { + my $fh = shift @_; + my $intro = shift @_; + print $fh $intro," " or die $!; + print $fh shellquote @_ or die $!; + print $fh "\n" or die $!; +} + +sub debugcmd { + my $extraprefix = shift @_; + printcmd(\*DEBUG,$debugprefix.$extraprefix,@_) if $debuglevel>0; +} + +sub debiantag ($$) { + my ($v,$distro) = @_; $v =~ y/~:/_%/; - return "debian/$v"; + return "$distro/$v"; } sub server_branch ($) { return "$branchprefix/$_[0]"; } @@ -49,28 +117,137 @@ sub stat_exists ($) { die "stat $f: $!"; } -sub git_for_each_ref ($$) { - my ($pattern,$func) = @_; +sub _us () { + $::us // ($0 =~ m#[^/]*$#, $&); +} + +sub fail { + my $s = "@_\n"; + my $prefix = _us().": "; + $s =~ s/^/$prefix/gm; + die $s; +} + +sub ensuredir ($) { + my ($dir) = @_; # does not create parents + return if mkdir $dir; + return if $! == EEXIST; + die "mkdir $dir: $!"; +} + +our @signames = split / /, $Config{sig_name}; + +sub waitstatusmsg () { + if (!$?) { + return "terminated, reporting successful completion"; + } elsif (!($? & 255)) { + return "failed with error exit status ".WEXITSTATUS($?); + } elsif (WIFSIGNALED($?)) { + my $signum=WTERMSIG($?); + return "died due to fatal signal ". + ($signames[$signum] // "number $signum"). + ($? & 128 ? " (core dumped)" : ""); # POSIX(3pm) has no WCOREDUMP + } else { + return "failed with unknown wait status ".$?; + } +} + +sub failedcmd { + { local ($!); printcmd \*STDERR, _us().": failed command:", @_ or die $!; }; + if ($!) { + fail "failed to fork/exec: $!"; + } elsif ($?) { + fail "subprocess ".waitstatusmsg(); + } else { + fail "subprocess produced invalid output"; + } +} + +sub cmdoutput_errok { + die Dumper(\@_)." ?" if grep { !defined } @_; + debugcmd "|",@_; + open P, "-|", @_ or die $!; + my $d; + $!=0; $?=0; + { local $/ = undef; $d =
; }
+ die $! if P->error;
+ if (!close P) { printdebug "=>!$?\n"; return undef; }
+ chomp $d;
+ if ($debuglevel > 0) {
+ $d =~ m/^.*/;
+ my $dd = $&;
+ my $more = (length $' ? '...' : ''); #');
+ $dd =~ s{[^\n -~]|\\}{ sprintf "\\x%02x", ord $& }ge;
+ printdebug "=> \`$dd'",$more,"\n";
+ }
+ return $d;
+}
+
+sub cmdoutput {
+ my $d = cmdoutput_errok @_;
+ defined $d or failedcmd @_;
+ return $d;
+}
+
+sub git_rev_parse ($) {
+ return cmdoutput qw(git rev-parse), "$_[0]~0";
+}
+
+sub git_for_each_ref ($$;$) {
+ my ($pattern,$func,$gitdir) = @_;
# calls $func->($objid,$objtype,$fullrefname,$reftail);
- # $reftail is RHS of ref after refs/\w+/
+ # $reftail is RHS of ref after refs/[^/]+/
# breaks if $pattern matches any ref `refs/blah' where blah has no `/'
- my $fh = new IO::File "-|", qw(git for-each-ref), $pattern or die $!;
- while (<$fh>) {
- m#^(\w+)\s+(\w+)\s+(refs/\w+/(\S+))\s# or die "$_ ?";
+ my @cmd = (qw(git for-each-ref), $pattern);
+ if (defined $gitdir) {
+ @cmd = ('sh','-ec','cd "$1"; shift; exec "$@"','x', $gitdir, @cmd);
+ }
+ open GFER, "-|", @cmd or die $!;
+ debugcmd "|", @cmd;
+ while (