X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=dgit.git;a=blobdiff_plain;f=Debian%2FDgit.pm;h=37cbc51b68e52116705d1988cf040eef36919bda;hp=e2a503d73eee9e5ae89f12b32d27e659963e426a;hb=9e3287b0f9611af321b7cb1ca7b7757dbe96cfd2;hpb=41d1bd6a6c194f11f906e1140861e976fac3f4e0 diff --git a/Debian/Dgit.pm b/Debian/Dgit.pm index e2a503d7..37cbc51b 100644 --- a/Debian/Dgit.pm +++ b/Debian/Dgit.pm @@ -7,6 +7,7 @@ use warnings; use POSIX; use IO::Handle; +use Config; BEGIN { use Exporter (); @@ -15,12 +16,17 @@ BEGIN { $VERSION = 1.00; @ISA = qw(Exporter); @EXPORT = qw(debiantag server_branch server_ref - stat_exists git_for_each_ref - $package_re $component_re $branchprefix + stat_exists fail ensuredir waitstatusmsg failedcmd + cmdoutput cmdoutput_errok + git_rev_parse git_get_ref git_for_each_ref + git_for_each_tag_referring is_fast_fwd + $package_re $component_re $deliberately_re + $branchprefix initdebug enabledebug enabledebuglevel printdebug debugcmd $debugprefix *debuglevel *DEBUG shellquote printcmd); + # implicitly uses $main::us %EXPORT_TAGS = ( policyflags => [qw(NOFFCHECK FRESHREPO)] ); @EXPORT_OK = @{ $EXPORT_TAGS{policyflags} }; } @@ -29,54 +35,15 @@ our @EXPORT_OK; our $package_re = '[0-9a-z][-+.0-9a-z]*'; our $component_re = '[0-9a-zA-Z][-+.0-9a-zA-Z]*'; +our $deliberately_re = "(?:TEST-)?$package_re"; our $branchprefix = 'dgit'; # policy hook exit status bits # see dgit-repos-server head comment for documentation -# 1 is reserved in case something fails with `exit 1' +# 1 is reserved in case something fails with `exit 1' and to spot +# dynamic loader, runtime, etc., failures, which report 127 or 255 sub NOFFCHECK () { return 0x2; } sub FRESHREPO () { return 0x4; } -# 0x80 is reserved - -sub debiantag ($) { - my ($v) = @_; - $v =~ y/~:/_%/; - return "debian/$v"; -} - -sub server_branch ($) { return "$branchprefix/$_[0]"; } -sub server_ref ($) { return "refs/".server_branch($_[0]); } - -sub stat_exists ($) { - my ($f) = @_; - return 1 if stat $f; - return 0 if $!==&ENOENT; - die "stat $f: $!"; -} - -sub git_for_each_ref ($$) { - my ($pattern,$func) = @_; - # calls $func->($objid,$objtype,$fullrefname,$reftail); - # $reftail is RHS of ref after refs/\w+/ - # breaks if $pattern matches any ref `refs/blah' where blah has no `/' - my $fh = new IO::File "-|", qw(git for-each-ref), $pattern or die $!; - while (<$fh>) { - m#^(\w+)\s+(\w+)\s+(refs/\w+/(\S+))\s# or die "$_ ?"; - $func->($1,$2,$3,$4); - } - $!=0; $?=0; close $fh or die "$pattern $? $!"; -} - -sub git_for_each_tag_referring ($$) { - my ($objreferring, $func) = @_; - # calls $func->($objid,$fullrefname,$tagname); - git_for_each_ref('refs/tags', sub { - my ($objid,$objtype,$fullrefname,$tagname) = @_; - next unless $objtype eq 'tag'; - next if defined $objreferring and $objid ne $objreferring; - $func->($objid,$fullrefname,$tagname); - }); -} our $debugprefix; our $debuglevel = 0; @@ -93,8 +60,12 @@ sub enabledebug () { } sub enabledebuglevel ($) { + my ($newlevel) = @_; # may be undef (eg from env var) die if $debuglevel; - ($debuglevel) = @_ + 0; + $newlevel //= 0; + $newlevel += 0; + return unless $newlevel; + $debuglevel = $newlevel; enabledebug(); } @@ -107,7 +78,7 @@ sub shellquote { local $_; foreach my $a (@_) { $_ = $a; - if (m{[^-=_./0-9a-z]}i) { + if (!length || m{[^-=_./0-9a-z]}i) { s{['\\]}{'\\$&'}g; push @out, "'$_'"; } else { @@ -130,4 +101,148 @@ sub debugcmd { printcmd(\*DEBUG,$debugprefix.$extraprefix,@_) if $debuglevel>0; } +sub debiantag ($) { + my ($v) = @_; + $v =~ y/~:/_%/; + return "debian/$v"; +} + +sub server_branch ($) { return "$branchprefix/$_[0]"; } +sub server_ref ($) { return "refs/".server_branch($_[0]); } + +sub stat_exists ($) { + my ($f) = @_; + return 1 if stat $f; + return 0 if $!==&ENOENT; + die "stat $f: $!"; +} + +sub _us () { + $::us // ($0 =~ m#[^/]*$#, $&); +} + +sub fail { + my $s = "@_\n"; + my $prefix = _us().": "; + $s =~ s/^/$prefix/gm; + die $s; +} + +sub ensuredir ($) { + my ($dir) = @_; # does not create parents + return if mkdir $dir; + return if $! == EEXIST; + die "mkdir $dir: $!"; +} + +our @signames = split / /, $Config{sig_name}; + +sub waitstatusmsg () { + if (!$?) { + return "terminated, reporting successful completion"; + } elsif (!($? & 255)) { + return "failed with error exit status ".WEXITSTATUS($?); + } elsif (WIFSIGNALED($?)) { + my $signum=WTERMSIG($?); + return "died due to fatal signal ". + ($signames[$signum] // "number $signum"). + ($? & 128 ? " (core dumped)" : ""); # POSIX(3pm) has no WCOREDUMP + } else { + return "failed with unknown wait status ".$?; + } +} + +sub failedcmd { + { local ($!); printcmd \*STDERR, _us().": failed command:", @_ or die $!; }; + if ($!) { + fail "failed to fork/exec: $!"; + } elsif ($?) { + fail "subprocess ".waitstatusmsg(); + } else { + fail "subprocess produced invalid output"; + } +} + +sub cmdoutput_errok { + die Dumper(\@_)." ?" if grep { !defined } @_; + debugcmd "|",@_; + open P, "-|", @_ or die $!; + my $d; + $!=0; $?=0; + { local $/ = undef; $d =

; } + die $! if P->error; + if (!close P) { printdebug "=>!$?\n"; return undef; } + chomp $d; + $d =~ m/^.*/; + printdebug "=> \`$&'",(length $' ? '...' : ''),"\n" if $debuglevel>0; #'; + return $d; +} + +sub cmdoutput { + my $d = cmdoutput_errok @_; + defined $d or failedcmd @_; + return $d; +} + +sub git_rev_parse ($) { + return cmdoutput qw(git rev-parse), "$_[0]~0"; +} + +sub git_for_each_ref ($$;$) { + my ($pattern,$func,$gitdir) = @_; + # calls $func->($objid,$objtype,$fullrefname,$reftail); + # $reftail is RHS of ref after refs/[^/]+/ + # breaks if $pattern matches any ref `refs/blah' where blah has no `/' + my @cmd = (qw(git for-each-ref), $pattern); + if (defined $gitdir) { + @cmd = ('sh','-ec','cd "$1"; shift; exec "$@"','x', $gitdir, @cmd); + } + open GFER, "-|", @cmd or die $!; + debugcmd "|", @cmd; + while () { + chomp or die "$_ ?"; + printdebug "|> ", $_, "\n"; + m#^(\w+)\s+(\w+)\s+(refs/[^/]+/(\S+))$# or die "$_ ?"; + $func->($1,$2,$3,$4); + } + $!=0; $?=0; close GFER or die "$pattern $? $!"; +} + +sub git_get_ref ($) { + # => '' if no such ref + my ($refname) = @_; + local $_ = $refname; + s{^refs/}{[r]efs/} or die "$refname $_ ?"; + return cmdoutput qw(git for-each-ref --format=%(objectname)), $_; +} + +sub git_for_each_tag_referring ($$) { + my ($objreferring, $func) = @_; + # calls $func->($tagobjid,$refobjid,$fullrefname,$tagname); + printdebug "git_for_each_tag_referring ", + ($objreferring // 'UNDEF'),"\n"; + git_for_each_ref('refs/tags', sub { + my ($tagobjid,$objtype,$fullrefname,$tagname) = @_; + return unless $objtype eq 'tag'; + my $refobjid = git_rev_parse $tagobjid; + return unless + !defined $objreferring # caller wants them all + or $tagobjid eq $objreferring + or $refobjid eq $objreferring; + $func->($tagobjid,$refobjid,$fullrefname,$tagname); + }); +} + +sub is_fast_fwd ($$) { + my ($ancestor,$child) = @_; + my @cmd = (qw(git merge-base), $ancestor, $child); + my $mb = cmdoutput_errok @cmd; + if (defined $mb) { + return git_rev_parse($mb) eq git_rev_parse($ancestor); + } else { + $?==256 or failedcmd @cmd; + return 0; + } +} + 1;