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_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
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;
81 if (!length || m{[^-=_./0-9a-z]}i) {
88 return join ' ', @out;
94 print $fh $intro," " or die $!;
95 print $fh shellquote @_ or die $!;
96 print $fh "\n" or die $!;
100 my $extraprefix = shift @_;
101 printcmd(\*DEBUG,$debugprefix.$extraprefix,@_) if $debuglevel>0;
110 sub server_branch ($) { return "$branchprefix/$_[0]"; }
111 sub server_ref ($) { return "refs/".server_branch($_[0]); }
113 sub stat_exists ($) {
116 return 0 if $!==&ENOENT;
121 $::us // ($0 =~ m#[^/]*$#, $&);
126 my $prefix = _us().": ";
127 $s =~ s/^/$prefix/gm;
132 my ($dir) = @_; # does not create parents
133 return if mkdir $dir;
134 return if $! == EEXIST;
135 die "mkdir $dir: $!";
138 our @signames = split / /, $Config{sig_name};
140 sub waitstatusmsg () {
142 return "terminated, reporting successful completion";
143 } elsif (!($? & 255)) {
144 return "failed with error exit status ".WEXITSTATUS($?);
145 } elsif (WIFSIGNALED($?)) {
146 my $signum=WTERMSIG($?);
147 return "died due to fatal signal ".
148 ($signames[$signum] // "number $signum").
149 ($? & 128 ? " (core dumped)" : ""); # POSIX(3pm) has no WCOREDUMP
151 return "failed with unknown wait status ".$?;
156 { local ($!); printcmd \*STDERR, _us().": failed command:", @_ or die $!; };
158 fail "failed to fork/exec: $!";
160 fail "subprocess ".waitstatusmsg();
162 fail "subprocess produced invalid output";
166 sub cmdoutput_errok {
167 die Dumper(\@_)." ?" if grep { !defined } @_;
169 open P, "-|", @_ or die $!;
172 { local $/ = undef; $d = <P>; }
174 if (!close P) { printdebug "=>!$?\n"; return undef; }
177 printdebug "=> \`$&'",(length $' ? '...' : ''),"\n" if $debuglevel>0; #';
182 my $d = cmdoutput_errok @_;
183 defined $d or failedcmd @_;
187 sub git_rev_parse ($) {
188 return cmdoutput qw(git rev-parse), "$_[0]~0";
191 sub git_for_each_ref ($$) {
192 my ($pattern,$func) = @_;
193 # calls $func->($objid,$objtype,$fullrefname,$reftail);
194 # $reftail is RHS of ref after refs/\w+/
195 # breaks if $pattern matches any ref `refs/blah' where blah has no `/'
196 my @cmd = (qw(git for-each-ref), $pattern);
197 open GFER, "-|", @cmd or die $!;
201 printdebug "|> ", $_, "\n";
202 m#^(\w+)\s+(\w+)\s+(refs/\w+/(\S+))$# or die "$_ ?";
203 $func->($1,$2,$3,$4);
205 $!=0; $?=0; close GFER or die "$pattern $? $!";
208 sub git_for_each_tag_referring ($$) {
209 my ($objreferring, $func) = @_;
210 # calls $func->($tagobjid,$refobjid,$fullrefname,$tagname);
211 printdebug "git_for_each_tag_referring ",
212 ($objreferring // 'UNDEF'),"\n";
213 git_for_each_ref('refs/tags', sub {
214 my ($tagobjid,$objtype,$fullrefname,$tagname) = @_;
215 return unless $objtype eq 'tag';
216 my $refobjid = git_rev_parse $tagobjid;
218 !defined $objreferring # caller wants them all
219 or $tagobjid eq $objreferring
220 or $refobjid eq $objreferring;
221 $func->($tagobjid,$refobjid,$fullrefname,$tagname);
225 sub is_fast_fwd ($$) {
226 my ($ancestor,$child) = @_;
227 my @cmd = (qw(git merge-base), $ancestor, $child);
228 my $mb = cmdoutput_errok @cmd;
230 return git_rev_parse($mb) eq git_rev_parse($ancestor);
232 $?==256 or failedcmd @cmd;