X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=Debian%2FDgit.pm;h=bfa76cc70de127d66e1e235db79c0b83e2f2a16e;hb=509af629e19c6c9d973d9fc8cd1739bd8de2d9d9;hp=f166f11b58464b7d9616579fb3af89f4ef01a41d;hpb=89506141b188407123bf605d2b051f2dfa10ad4b;p=dgit.git diff --git a/Debian/Dgit.pm b/Debian/Dgit.pm index f166f11b..bfa76cc7 100644 --- a/Debian/Dgit.pm +++ b/Debian/Dgit.pm @@ -5,8 +5,12 @@ 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 (); @@ -14,12 +18,23 @@ 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 - initdebug enabledebug printdebug debugcmd + @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 + 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); + shellquote printcmd messagequote); + # implicitly uses $main::us %EXPORT_TAGS = ( policyflags => [qw(NOFFCHECK FRESHREPO)] ); @EXPORT_OK = @{ $EXPORT_TAGS{policyflags} }; } @@ -28,58 +43,26 @@ 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) = @_; - $v =~ y/~:/_%/; - return "debian/$v"; -} - -sub server_branch ($) { return "$branchprefix/$_[0]"; } -sub server_ref ($) { return "refs/".server_branch($_[0]); } - -sub stat_exists ($) { - my ($f) = @_; - return 1 if stat $f; - return 0 if $!==&ENOENT; - die "stat $f: $!"; -} - -sub git_for_each_ref ($$) { - my ($pattern,$func) = @_; - # calls $func->($objid,$objtype,$fullrefname,$reftail); - # $reftail is RHS of ref after refs/\w+/ - # breaks if $pattern matches any ref `refs/blah' where blah has no `/' - my $fh = new IO::File "-|", qw(git for-each-ref), $pattern or die $!; - while (<$fh>) { - m#^(\w+)\s+(\w+)\s+(refs/\w+/(\S+))\s# or die "$_ ?"; - $func->($1,$2,$3,$4); - } - $!=0; $?=0; close $fh or die "$pattern $? $!"; -} - -sub git_for_each_tag_referring ($$) { - my ($objreferring, $func) = @_; - # calls $func->($objid,$fullrefname,$tagname); - git_for_each_ref('refs/tags', sub { - my ($objid,$objtype,$fullrefname,$tagname) = @_; - next unless $objtype eq 'tag'; - next if defined $objreferring and $objid ne $objreferring; - $func->($objid,$fullrefname,$tagname); - }); -} our $debugprefix; our $debuglevel = 0; +sub setup_sigwarn () { + our $sigwarn_mainprocess = $$; + $SIG{__WARN__} = sub { + die $_[0] unless getppid == $sigwarn_mainprocess; + }; +} + sub initdebug ($) { ($debugprefix) = @_; open DEBUG, ">/dev/null" or die $!; @@ -91,16 +74,36 @@ sub enabledebug () { $debuglevel ||= 1; } +sub enabledebuglevel ($) { + my ($newlevel) = @_; # may be undef (eg from env var) + die if $debuglevel; + $newlevel //= 0; + $newlevel += 0; + return unless $newlevel; + $debuglevel = $newlevel; + enabledebug(); +} + sub printdebug { print DEBUG $debugprefix, @_ or die $! if $debuglevel>0; } +sub messagequote ($) { + local ($_) = @_; + s{\\}{\\\\}g; + s{\n}{\\n}g; + s{\x08}{\\b}g; + s{\t}{\\t}g; + s{[\000-\037\177]}{ sprintf "\\x%02x", ord $& }ge; + $_; +} + sub shellquote { my @out; local $_; foreach my $a (@_) { $_ = $a; - if (m{[^-=_./0-9a-z]}i) { + if (!length || m{[^-=_./:0-9a-z]}i) { s{['\\]}{'\\$&'}g; push @out, "'$_'"; } else { @@ -123,4 +126,204 @@ sub debugcmd { printcmd(\*DEBUG,$debugprefix.$extraprefix,@_) if $debuglevel>0; } +sub debiantag_old ($$) { + my ($v,$distro) = @_; + $v =~ y/~:/_%/; + return "$distro/$v"; +} + +sub debiantag_new ($$) { + my ($v,$distro) = @_; + $v =~ y/~:/_%/; + return "archive/$distro/$v"; +} + +sub debiantags ($$) { + my ($version,$distro) = @_; + map { $_->($version, $distro) } (\&debiantag_new, \&debiantag_old); +} + +sub server_branch ($) { return "$branchprefix/$_[0]"; } +sub server_ref ($) { return "refs/".server_branch($_[0]); } + +sub stat_exists ($) { + my ($f) = @_; + return 1 if stat $f; + return 0 if $!==&ENOENT; + die "stat $f: $!"; +} + +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: $!"; +} + +sub executable_on_path ($) { + 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 / /, $Config{sig_name}; + +sub waitstatusmsg () { + if (!$?) { + 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 { + # 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 $! >0 unchanged system + { local ($!); printcmd \*STDERR, _us().": failed command:", @_ or die $!; }; + if ($? < 0) { + fail "failed to fork/exec: $!"; + } elsif ($?) { + fail "subprocess ".waitstatusmsg(); + } else { + fail "subprocess produced invalid output"; + } +} + +sub cmdoutput_errok { + confess Dumper(\@_)." ?" if grep { !defined } @_; + debugcmd "|",@_; + open P, "-|", @_ or die "$_[0] $!"; + my $d; + $!=0; $?=0; + { local $/ = undef; $d =
; }
+ die $! if P->error;
+ if (!close P) { printdebug "=>!$?\n"; return undef; }
+ chomp $d;
+ if ($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 link_ltarget ($$) {
+ my ($old,$new) = @_;
+ lstat $old or return undef;
+ if (-l _) {
+ $old = cmdoutput qw(realpath --), $old;
+ }
+ link $old, $new or die "link $old $new: $!";
+}
+
+sub hashfile ($) {
+ my ($fn) = @_;
+ my $h = Digest::SHA->new(256);
+ $h->addfile($fn);
+ return $h->hexdigest();
+}
+
+sub git_rev_parse ($) {
+ return cmdoutput qw(git rev-parse), "$_[0]~0";
+}
+
+sub git_for_each_ref ($$;$) {
+ my ($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 `/'
+ # $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);
+ }
+ open GFER, "-|", @cmd or die $!;
+ debugcmd "|", @cmd;
+ while (