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
29 shellquote printcmd messagequote);
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;
84 sub messagequote ($) {
90 s{[\000-\037\177]}{ sprintf "\\x%02x", ord $& }ge;
99 if (!length || m{[^-=_./:0-9a-z]}i) {
106 return join ' ', @out;
111 my $intro = shift @_;
112 print $fh $intro," " or die $!;
113 print $fh shellquote @_ or die $!;
114 print $fh "\n" or die $!;
118 my $extraprefix = shift @_;
119 printcmd(\*DEBUG,$debugprefix.$extraprefix,@_) if $debuglevel>0;
123 my ($v,$distro) = @_;
128 sub server_branch ($) { return "$branchprefix/$_[0]"; }
129 sub server_ref ($) { return "refs/".server_branch($_[0]); }
131 sub stat_exists ($) {
134 return 0 if $!==&ENOENT;
139 $::us // ($0 =~ m#[^/]*$#, $&);
144 my $prefix = _us().": ";
145 $s =~ s/^/$prefix/gm;
150 my ($dir) = @_; # does not create parents
151 return if mkdir $dir;
152 return if $! == EEXIST;
153 die "mkdir $dir: $!";
156 our @signames = split / /, $Config{sig_name};
158 sub waitstatusmsg () {
160 return "terminated, reporting successful completion";
161 } elsif (!($? & 255)) {
162 return "failed with error exit status ".WEXITSTATUS($?);
163 } elsif (WIFSIGNALED($?)) {
164 my $signum=WTERMSIG($?);
165 return "died due to fatal signal ".
166 ($signames[$signum] // "number $signum").
167 ($? & 128 ? " (core dumped)" : ""); # POSIX(3pm) has no WCOREDUMP
169 return "failed with unknown wait status ".$?;
174 { local ($!); printcmd \*STDERR, _us().": failed command:", @_ or die $!; };
176 fail "failed to fork/exec: $!";
178 fail "subprocess ".waitstatusmsg();
180 fail "subprocess produced invalid output";
184 sub cmdoutput_errok {
185 die Dumper(\@_)." ?" if grep { !defined } @_;
187 open P, "-|", @_ or die $!;
190 { local $/ = undef; $d = <P>; }
192 if (!close P) { printdebug "=>!$?\n"; return undef; }
194 if ($debuglevel > 0) {
197 my $more = (length $' ? '...' : ''); #');
198 $dd =~ s{[^\n -~]|\\}{ sprintf "\\x%02x", ord $& }ge;
199 printdebug "=> \`$dd'",$more,"\n";
205 my $d = cmdoutput_errok @_;
206 defined $d or failedcmd @_;
210 sub git_rev_parse ($) {
211 return cmdoutput qw(git rev-parse), "$_[0]~0";
214 sub git_for_each_ref ($$;$) {
215 my ($pattern,$func,$gitdir) = @_;
216 # calls $func->($objid,$objtype,$fullrefname,$reftail);
217 # $reftail is RHS of ref after refs/[^/]+/
218 # breaks if $pattern matches any ref `refs/blah' where blah has no `/'
219 my @cmd = (qw(git for-each-ref), $pattern);
220 if (defined $gitdir) {
221 @cmd = ('sh','-ec','cd "$1"; shift; exec "$@"','x', $gitdir, @cmd);
223 open GFER, "-|", @cmd or die $!;
227 printdebug "|> ", $_, "\n";
228 m#^(\w+)\s+(\w+)\s+(refs/[^/]+/(\S+))$# or die "$_ ?";
229 $func->($1,$2,$3,$4);
231 $!=0; $?=0; close GFER or die "$pattern $? $!";
234 sub git_get_ref ($) {
235 # => '' if no such ref
238 s{^refs/}{[r]efs/} or die "$refname $_ ?";
239 return cmdoutput qw(git for-each-ref --format=%(objectname)), $_;
242 sub git_for_each_tag_referring ($$) {
243 my ($objreferring, $func) = @_;
244 # calls $func->($tagobjid,$refobjid,$fullrefname,$tagname);
245 printdebug "git_for_each_tag_referring ",
246 ($objreferring // 'UNDEF'),"\n";
247 git_for_each_ref('refs/tags', sub {
248 my ($tagobjid,$objtype,$fullrefname,$tagname) = @_;
249 return unless $objtype eq 'tag';
250 my $refobjid = git_rev_parse $tagobjid;
252 !defined $objreferring # caller wants them all
253 or $tagobjid eq $objreferring
254 or $refobjid eq $objreferring;
255 $func->($tagobjid,$refobjid,$fullrefname,$tagname);
259 sub is_fast_fwd ($$) {
260 my ($ancestor,$child) = @_;
261 my @cmd = (qw(git merge-base), $ancestor, $child);
262 my $mb = cmdoutput_errok @cmd;
264 return git_rev_parse($mb) eq git_rev_parse($ancestor);
266 $?==256 or failedcmd @cmd;