14 our ($VERSION, @ISA, @EXPORT, @EXPORT_OK, %EXPORT_TAGS);
18 @EXPORT = qw(debiantag server_branch server_ref
19 stat_exists fail 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;
131 our @signames = split / /, $Config{sig_name};
133 sub waitstatusmsg () {
135 return "terminated, reporting successful completion";
136 } elsif (!($? & 255)) {
137 return "failed with error exit status ".WEXITSTATUS($?);
138 } elsif (WIFSIGNALED($?)) {
139 my $signum=WTERMSIG($?);
140 return "died due to fatal signal ".
141 ($signames[$signum] // "number $signum").
142 ($? & 128 ? " (core dumped)" : ""); # POSIX(3pm) has no WCOREDUMP
144 return "failed with unknown wait status ".$?;
149 { local ($!); printcmd \*STDERR, _us().": failed command:", @_ or die $!; };
151 fail "failed to fork/exec: $!";
153 fail "subprocess ".waitstatusmsg();
155 fail "subprocess produced invalid output";
159 sub cmdoutput_errok {
160 die Dumper(\@_)." ?" if grep { !defined } @_;
162 open P, "-|", @_ or die $!;
165 { local $/ = undef; $d = <P>; }
167 if (!close P) { printdebug "=>!$?\n"; return undef; }
170 printdebug "=> \`$&'",(length $' ? '...' : ''),"\n" if $debuglevel>0; #';
175 my $d = cmdoutput_errok @_;
176 defined $d or failedcmd @_;
180 sub git_rev_parse ($) {
181 return cmdoutput qw(git rev-parse), "$_[0]~0";
184 sub git_for_each_ref ($$) {
185 my ($pattern,$func) = @_;
186 # calls $func->($objid,$objtype,$fullrefname,$reftail);
187 # $reftail is RHS of ref after refs/\w+/
188 # breaks if $pattern matches any ref `refs/blah' where blah has no `/'
189 my @cmd = (qw(git for-each-ref), $pattern);
190 open GFER, "-|", @cmd or die $!;
194 printdebug "|> ", $_, "\n";
195 m#^(\w+)\s+(\w+)\s+(refs/\w+/(\S+))$# or die "$_ ?";
196 $func->($1,$2,$3,$4);
198 $!=0; $?=0; close GFER or die "$pattern $? $!";
201 sub git_for_each_tag_referring ($$) {
202 my ($objreferring, $func) = @_;
203 # calls $func->($objid,$fullrefname,$tagname);
204 printdebug "git_for_each_tag_referring ",
205 ($objreferring // 'UNDEF'),"\n";
206 git_for_each_ref('refs/tags', sub {
207 my ($objid,$objtype,$fullrefname,$tagname) = @_;
208 return unless $objtype eq 'tag';
209 return if defined $objreferring and $objid ne $objreferring;
210 $func->($objid,$fullrefname,$tagname);
214 sub is_fast_fwd ($$) {
215 my ($ancestor,$child) = @_;
216 my @cmd = (qw(git merge-base), $ancestor, $child);
217 my $mb = cmdoutput_errok @cmd;
219 return git_rev_parse($mb) eq git_rev_parse($ancestor);
221 $?==256 or failedcmd @cmd;