14 our ($VERSION, @ISA, @EXPORT, @EXPORT_OK, %EXPORT_TAGS);
18 @EXPORT = qw(setup_sigwarn
19 debiantag server_branch server_ref
20 stat_exists fail ensuredir waitstatusmsg failedcmd
21 cmdoutput cmdoutput_errok
22 git_rev_parse git_get_ref git_for_each_ref
23 git_for_each_tag_referring is_fast_fwd
24 $package_re $component_re $deliberately_re
26 initdebug enabledebug enabledebuglevel
28 $debugprefix *debuglevel *DEBUG
30 # implicitly uses $main::us
31 %EXPORT_TAGS = ( policyflags => [qw(NOFFCHECK FRESHREPO)] );
32 @EXPORT_OK = @{ $EXPORT_TAGS{policyflags} };
37 our $package_re = '[0-9a-z][-+.0-9a-z]*';
38 our $component_re = '[0-9a-zA-Z][-+.0-9a-zA-Z]*';
39 our $deliberately_re = "(?:TEST-)?$package_re";
40 our $branchprefix = 'dgit';
42 # policy hook exit status bits
43 # see dgit-repos-server head comment for documentation
44 # 1 is reserved in case something fails with `exit 1' and to spot
45 # dynamic loader, runtime, etc., failures, which report 127 or 255
46 sub NOFFCHECK () { return 0x2; }
47 sub FRESHREPO () { return 0x4; }
52 sub setup_sigwarn () {
53 our $sigwarn_mainprocess = $$;
54 $SIG{__WARN__} = sub {
55 die $_[0] unless getppid == $sigwarn_mainprocess;
61 open DEBUG, ">/dev/null" or die $!;
65 open DEBUG, ">&STDERR" or die $!;
70 sub enabledebuglevel ($) {
71 my ($newlevel) = @_; # may be undef (eg from env var)
75 return unless $newlevel;
76 $debuglevel = $newlevel;
81 print DEBUG $debugprefix, @_ or die $! if $debuglevel>0;
89 if (!length || m{[^-=_./0-9a-z]}i) {
96 return join ' ', @out;
101 my $intro = shift @_;
102 print $fh $intro," " or die $!;
103 print $fh shellquote @_ or die $!;
104 print $fh "\n" or die $!;
108 my $extraprefix = shift @_;
109 printcmd(\*DEBUG,$debugprefix.$extraprefix,@_) if $debuglevel>0;
113 my ($v,$distro) = @_;
118 sub server_branch ($) { return "$branchprefix/$_[0]"; }
119 sub server_ref ($) { return "refs/".server_branch($_[0]); }
121 sub stat_exists ($) {
124 return 0 if $!==&ENOENT;
129 $::us // ($0 =~ m#[^/]*$#, $&);
134 my $prefix = _us().": ";
135 $s =~ s/^/$prefix/gm;
140 my ($dir) = @_; # does not create parents
141 return if mkdir $dir;
142 return if $! == EEXIST;
143 die "mkdir $dir: $!";
146 our @signames = split / /, $Config{sig_name};
148 sub waitstatusmsg () {
150 return "terminated, reporting successful completion";
151 } elsif (!($? & 255)) {
152 return "failed with error exit status ".WEXITSTATUS($?);
153 } elsif (WIFSIGNALED($?)) {
154 my $signum=WTERMSIG($?);
155 return "died due to fatal signal ".
156 ($signames[$signum] // "number $signum").
157 ($? & 128 ? " (core dumped)" : ""); # POSIX(3pm) has no WCOREDUMP
159 return "failed with unknown wait status ".$?;
164 { local ($!); printcmd \*STDERR, _us().": failed command:", @_ or die $!; };
166 fail "failed to fork/exec: $!";
168 fail "subprocess ".waitstatusmsg();
170 fail "subprocess produced invalid output";
174 sub cmdoutput_errok {
175 die Dumper(\@_)." ?" if grep { !defined } @_;
177 open P, "-|", @_ or die $!;
180 { local $/ = undef; $d = <P>; }
182 if (!close P) { printdebug "=>!$?\n"; return undef; }
184 if ($debuglevel > 0) {
187 my $more = (length $' ? '...' : ''); #');
188 $dd =~ s{[^\n -~]|\\}{ sprintf "\\x%02x", ord $& }ge;
189 printdebug "=> \`$dd'",$more,"\n";
195 my $d = cmdoutput_errok @_;
196 defined $d or failedcmd @_;
200 sub git_rev_parse ($) {
201 return cmdoutput qw(git rev-parse), "$_[0]~0";
204 sub git_for_each_ref ($$;$) {
205 my ($pattern,$func,$gitdir) = @_;
206 # calls $func->($objid,$objtype,$fullrefname,$reftail);
207 # $reftail is RHS of ref after refs/[^/]+/
208 # breaks if $pattern matches any ref `refs/blah' where blah has no `/'
209 my @cmd = (qw(git for-each-ref), $pattern);
210 if (defined $gitdir) {
211 @cmd = ('sh','-ec','cd "$1"; shift; exec "$@"','x', $gitdir, @cmd);
213 open GFER, "-|", @cmd or die $!;
217 printdebug "|> ", $_, "\n";
218 m#^(\w+)\s+(\w+)\s+(refs/[^/]+/(\S+))$# or die "$_ ?";
219 $func->($1,$2,$3,$4);
221 $!=0; $?=0; close GFER or die "$pattern $? $!";
224 sub git_get_ref ($) {
225 # => '' if no such ref
228 s{^refs/}{[r]efs/} or die "$refname $_ ?";
229 return cmdoutput qw(git for-each-ref --format=%(objectname)), $_;
232 sub git_for_each_tag_referring ($$) {
233 my ($objreferring, $func) = @_;
234 # calls $func->($tagobjid,$refobjid,$fullrefname,$tagname);
235 printdebug "git_for_each_tag_referring ",
236 ($objreferring // 'UNDEF'),"\n";
237 git_for_each_ref('refs/tags', sub {
238 my ($tagobjid,$objtype,$fullrefname,$tagname) = @_;
239 return unless $objtype eq 'tag';
240 my $refobjid = git_rev_parse $tagobjid;
242 !defined $objreferring # caller wants them all
243 or $tagobjid eq $objreferring
244 or $refobjid eq $objreferring;
245 $func->($tagobjid,$refobjid,$fullrefname,$tagname);
249 sub is_fast_fwd ($$) {
250 my ($ancestor,$child) = @_;
251 my @cmd = (qw(git merge-base), $ancestor, $child);
252 my $mb = cmdoutput_errok @cmd;
254 return git_rev_parse($mb) eq git_rev_parse($ancestor);
256 $?==256 or failedcmd @cmd;