14 our ($VERSION, @ISA, @EXPORT, @EXPORT_OK, %EXPORT_TAGS);
18 @EXPORT = qw(debiantag server_branch server_ref
19 stat_exists fail ensuredir waitstatusmsg failedcmd
20 cmdoutput cmdoutput_errok
21 git_rev_parse git_get_ref git_for_each_ref
22 git_for_each_tag_referring is_fast_fwd
23 $package_re $component_re $deliberately_re
25 initdebug enabledebug enabledebuglevel
27 $debugprefix *debuglevel *DEBUG
28 shellquote printcmd messagequote);
29 # implicitly uses $main::us
30 %EXPORT_TAGS = ( policyflags => [qw(NOFFCHECK FRESHREPO)] );
31 @EXPORT_OK = @{ $EXPORT_TAGS{policyflags} };
36 our $package_re = '[0-9a-z][-+.0-9a-z]*';
37 our $component_re = '[0-9a-zA-Z][-+.0-9a-zA-Z]*';
38 our $deliberately_re = "(?:TEST-)?$package_re";
39 our $branchprefix = 'dgit';
41 # policy hook exit status bits
42 # see dgit-repos-server head comment for documentation
43 # 1 is reserved in case something fails with `exit 1' and to spot
44 # dynamic loader, runtime, etc., failures, which report 127 or 255
45 sub NOFFCHECK () { return 0x2; }
46 sub FRESHREPO () { return 0x4; }
53 open DEBUG, ">/dev/null" or die $!;
57 open DEBUG, ">&STDERR" or die $!;
62 sub enabledebuglevel ($) {
63 my ($newlevel) = @_; # may be undef (eg from env var)
67 return unless $newlevel;
68 $debuglevel = $newlevel;
73 print DEBUG $debugprefix, @_ or die $! if $debuglevel>0;
76 sub messagequote ($) {
82 s{[\000-\037\177]}{ sprintf "\\x%02x", ord $& }ge;
91 if (!length || m{[^-=_./0-9a-z]}i) {
98 return join ' ', @out;
103 my $intro = shift @_;
104 print $fh $intro," " or die $!;
105 print $fh shellquote @_ or die $!;
106 print $fh "\n" or die $!;
110 my $extraprefix = shift @_;
111 printcmd(\*DEBUG,$debugprefix.$extraprefix,@_) if $debuglevel>0;
115 my ($v,$distro) = @_;
120 sub server_branch ($) { return "$branchprefix/$_[0]"; }
121 sub server_ref ($) { return "refs/".server_branch($_[0]); }
123 sub stat_exists ($) {
126 return 0 if $!==&ENOENT;
131 $::us // ($0 =~ m#[^/]*$#, $&);
136 my $prefix = _us().": ";
137 $s =~ s/^/$prefix/gm;
142 my ($dir) = @_; # does not create parents
143 return if mkdir $dir;
144 return if $! == EEXIST;
145 die "mkdir $dir: $!";
148 our @signames = split / /, $Config{sig_name};
150 sub waitstatusmsg () {
152 return "terminated, reporting successful completion";
153 } elsif (!($? & 255)) {
154 return "failed with error exit status ".WEXITSTATUS($?);
155 } elsif (WIFSIGNALED($?)) {
156 my $signum=WTERMSIG($?);
157 return "died due to fatal signal ".
158 ($signames[$signum] // "number $signum").
159 ($? & 128 ? " (core dumped)" : ""); # POSIX(3pm) has no WCOREDUMP
161 return "failed with unknown wait status ".$?;
166 { local ($!); printcmd \*STDERR, _us().": failed command:", @_ or die $!; };
168 fail "failed to fork/exec: $!";
170 fail "subprocess ".waitstatusmsg();
172 fail "subprocess produced invalid output";
176 sub cmdoutput_errok {
177 die Dumper(\@_)." ?" if grep { !defined } @_;
179 open P, "-|", @_ or die $!;
182 { local $/ = undef; $d = <P>; }
184 if (!close P) { printdebug "=>!$?\n"; return undef; }
186 if ($debuglevel > 0) {
189 my $more = (length $' ? '...' : ''); #');
190 $dd =~ s{[^\n -~]|\\}{ sprintf "\\x%02x", ord $& }ge;
191 printdebug "=> \`$dd'",$more,"\n";
197 my $d = cmdoutput_errok @_;
198 defined $d or failedcmd @_;
202 sub git_rev_parse ($) {
203 return cmdoutput qw(git rev-parse), "$_[0]~0";
206 sub git_for_each_ref ($$;$) {
207 my ($pattern,$func,$gitdir) = @_;
208 # calls $func->($objid,$objtype,$fullrefname,$reftail);
209 # $reftail is RHS of ref after refs/[^/]+/
210 # breaks if $pattern matches any ref `refs/blah' where blah has no `/'
211 my @cmd = (qw(git for-each-ref), $pattern);
212 if (defined $gitdir) {
213 @cmd = ('sh','-ec','cd "$1"; shift; exec "$@"','x', $gitdir, @cmd);
215 open GFER, "-|", @cmd or die $!;
219 printdebug "|> ", $_, "\n";
220 m#^(\w+)\s+(\w+)\s+(refs/[^/]+/(\S+))$# or die "$_ ?";
221 $func->($1,$2,$3,$4);
223 $!=0; $?=0; close GFER or die "$pattern $? $!";
226 sub git_get_ref ($) {
227 # => '' if no such ref
230 s{^refs/}{[r]efs/} or die "$refname $_ ?";
231 return cmdoutput qw(git for-each-ref --format=%(objectname)), $_;
234 sub git_for_each_tag_referring ($$) {
235 my ($objreferring, $func) = @_;
236 # calls $func->($tagobjid,$refobjid,$fullrefname,$tagname);
237 printdebug "git_for_each_tag_referring ",
238 ($objreferring // 'UNDEF'),"\n";
239 git_for_each_ref('refs/tags', sub {
240 my ($tagobjid,$objtype,$fullrefname,$tagname) = @_;
241 return unless $objtype eq 'tag';
242 my $refobjid = git_rev_parse $tagobjid;
244 !defined $objreferring # caller wants them all
245 or $tagobjid eq $objreferring
246 or $refobjid eq $objreferring;
247 $func->($tagobjid,$refobjid,$fullrefname,$tagname);
251 sub is_fast_fwd ($$) {
252 my ($ancestor,$child) = @_;
253 my @cmd = (qw(git merge-base), $ancestor, $child);
254 my $mb = cmdoutput_errok @cmd;
256 return git_rev_parse($mb) eq git_rev_parse($ancestor);
258 $?==256 or failedcmd @cmd;