X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=dgit.git;a=blobdiff_plain;f=Debian%2FDgit.pm;h=91d4c7111f57dc80a16943714f38fe66850e0dfb;hp=b678ba53ead7cba05a4d579ebef5ae1f5f5df6c9;hb=268663da0b2726d94d54f95299ed2c4a0bd7351b;hpb=780a7c95e17f7d467015070895cb1fc18e1daff4 diff --git a/Debian/Dgit.pm b/Debian/Dgit.pm index b678ba53..91d4c711 100644 --- a/Debian/Dgit.pm +++ b/Debian/Dgit.pm @@ -31,6 +31,8 @@ use Data::Dumper; use IPC::Open2; use File::Path; use File::Basename; +use Dpkg::Control::Hash; +use Debian::Dgit::ExitStatus; BEGIN { use Exporter (); @@ -41,31 +43,46 @@ BEGIN { @EXPORT = qw(setup_sigwarn forkcheck_setup forkcheck_mainprocess dep14_version_mangle debiantags debiantag_old debiantag_new + debiantag_maintview + upstreamversion + stripepoch source_file_leafname is_orig_file_of_p_v server_branch server_ref stat_exists link_ltarget hashfile - fail ensuredir must_getcwd executable_on_path + fail failmsg ensuredir must_getcwd executable_on_path waitstatusmsg failedcmd_waitstatus failedcmd_report_cmd failedcmd - runcmd cmdoutput cmdoutput_errok + runcmd shell_cmd cmdoutput cmdoutput_errok git_rev_parse git_cat_file - git_get_ref git_for_each_ref + git_get_ref git_get_symref git_for_each_ref git_for_each_tag_referring is_fast_fwd + git_check_unmodified + git_reflog_action_msg git_update_ref_cmd + make_commit_text + reflog_cache_insert reflog_cache_lookup $package_re $component_re $deliberately_re $distro_re $versiontag_re $series_filename_re + $orig_f_comp_re $orig_f_sig_re $orig_f_tail_re + $extra_orig_namepart_re + $git_null_obj $branchprefix + $ffq_refprefix $gdrlast_refprefix initdebug enabledebug enabledebuglevel printdebug debugcmd + $printdebug_when_debuglevel $debugcmd_when_debuglevel $debugprefix *debuglevel *DEBUG shellquote printcmd messagequote $negate_harmful_gitattrs changedir git_slurp_config_src + gdr_ffq_prev_branchinfo + parsecontrolfh parsecontrol parsechangelog + getfield parsechangelog_loop playtree_setup); # implicitly uses $main::us %EXPORT_TAGS = ( policyflags => [qw(NOFFCHECK FRESHREPO NOCOMMITCHECK)], playground => [qw(record_maindir $maindir $local_git_cfg $maindir_gitdir $maindir_gitcommon - fresh_playground $playground + fresh_playground ensure_a_playground)]); @EXPORT_OK = ( @{ $EXPORT_TAGS{policyflags} }, @{ $EXPORT_TAGS{playground} } ); @@ -80,6 +97,20 @@ our $distro_re = $component_re; our $versiontag_re = qr{[-+.\%_0-9a-zA-Z/]+}; our $branchprefix = 'dgit'; our $series_filename_re = qr{(?:^|\.)series(?!\n)$}s; +our $extra_orig_namepart_re = qr{[-0-9a-z]+}; +our $orig_f_comp_re = qr{orig(?:-$extra_orig_namepart_re)?}; +our $orig_f_sig_re = '\\.(?:asc|gpg|pgp)'; +our $orig_f_tail_re = "$orig_f_comp_re\\.tar(?:\\.\\w+)?(?:$orig_f_sig_re)?"; +our $git_null_obj = '0' x 40; +our $ffq_refprefix = 'ffq-prev'; +our $gdrlast_refprefix = 'debrebase-last'; +our $printdebug_when_debuglevel = 1; +our $debugcmd_when_debuglevel = 1; + +# these three all go together, only valid after record_maindir +our $maindir; +our $maindir_gitdir; +our $maindir_gitcommon; # policy hook exit status bits # see dgit-repos-server head comment for documentation @@ -92,7 +123,9 @@ sub NOCOMMITCHECK () { return 0x8; } our $debugprefix; our $debuglevel = 0; -our $negate_harmful_gitattrs = "-text -eol -crlf -ident -filter"; +our $negate_harmful_gitattrs = + "-text -eol -crlf -ident -filter -working-tree-encoding"; + # ^ when updating this, alter the regexp in dgit:is_gitattrs_setup our $forkcheck_mainprocess; @@ -108,7 +141,7 @@ sub forkcheck_mainprocess () { sub setup_sigwarn () { forkcheck_setup(); $SIG{__WARN__} = sub { - die $_[0] if forkcheck_mainprocess; + confess $_[0] if forkcheck_mainprocess; }; } @@ -134,7 +167,21 @@ sub enabledebuglevel ($) { } sub printdebug { - print DEBUG $debugprefix, @_ or die $! if $debuglevel>0; + # Prints a prefix, and @_, to DEBUG. @_ should normally contain + # a trailing \n. + + # With no (or only empty) arguments just prints the prefix and + # leaves the caller to do more with DEBUG. The caller should make + # sure then to call printdebug with something ending in "\n" to + # get the prefix right in subsequent calls. + + return unless $debuglevel >= $printdebug_when_debuglevel; + our $printdebug_noprefix; + print DEBUG $debugprefix unless $printdebug_noprefix; + pop @_ while @_ and !length $_[-1]; + return unless @_; + print DEBUG @_ or die $!; + $printdebug_noprefix = $_[-1] !~ m{\n$}; } sub messagequote ($) { @@ -173,7 +220,8 @@ sub printcmd { sub debugcmd { my $extraprefix = shift @_; - printcmd(\*DEBUG,$debugprefix.$extraprefix,@_) if $debuglevel>0; + printcmd(\*DEBUG,$debugprefix.$extraprefix,@_) + if $debuglevel >= $debugcmd_when_debuglevel; } sub dep14_version_mangle ($) { @@ -194,11 +242,40 @@ sub debiantag_new ($$) { return "archive/$distro/".dep14_version_mangle $v; } +sub debiantag_maintview ($$) { + my ($v,$distro) = @_; + return "$distro/".dep14_version_mangle $v; +} + sub debiantags ($$) { my ($version,$distro) = @_; map { $_->($version, $distro) } (\&debiantag_new, \&debiantag_old); } +sub stripepoch ($) { + my ($vsn) = @_; + $vsn =~ s/^\d+\://; + return $vsn; +} + +sub upstreamversion ($) { + my ($vsn) = @_; + $vsn =~ s/-[^-]+$//; + return $vsn; +} + +sub source_file_leafname ($$$) { + my ($package,$vsn,$sfx) = @_; + return "${package}_".(stripepoch $vsn).$sfx +} + +sub is_orig_file_of_p_v ($$$) { + my ($f, $package, $upstreamvsn) = @_; + my $base = source_file_leafname $package, $upstreamvsn, ''; + return 0 unless $f =~ m/^\Q$base\E\.$orig_f_tail_re$/; + return 1; +} + sub server_branch ($) { return "$branchprefix/$_[0]"; } sub server_ref ($) { return "refs/".server_branch($_[0]); } @@ -213,12 +290,16 @@ sub _us () { $::us // ($0 =~ m#[^/]*$#, $&); } -sub fail { - my $s = "@_\n"; - $s =~ s/\n\n$/\n/; +sub failmsg { + my $s = "error: @_\n"; + $s =~ s/\n\n$/\n/g; my $prefix = _us().": "; $s =~ s/^/$prefix/gm; - die $s; + return "\n".$s; +} + +sub fail { + die failmsg @_; } sub ensuredir ($) { @@ -300,8 +381,14 @@ sub runcmd { failedcmd @_ if system @_; } +sub shell_cmd { + my ($first_shell, @cmd) = @_; + return qw(sh -ec), $first_shell.'; exec "$@"', 'x', @cmd; +} + sub cmdoutput_errok { confess Dumper(\@_)." ?" if grep { !defined } @_; + local $printdebug_when_debuglevel = $debugcmd_when_debuglevel; debugcmd "|",@_; open P, "-|", @_ or die "$_[0] $!"; my $d; @@ -348,11 +435,22 @@ sub git_rev_parse ($) { return cmdoutput qw(git rev-parse), "$_[0]~0"; } -sub git_cat_file ($) { - my ($objname) = @_; +sub git_cat_file ($;$) { + my ($objname, $etype) = @_; # => ($type, $data) or ('missing', undef) # in scalar context, just the data + # if $etype defined, dies unless type is $etype or in @$etype our ($gcf_pid, $gcf_i, $gcf_o); + local $printdebug_when_debuglevel = $debugcmd_when_debuglevel; + my $chk = sub { + my ($gtype, $data) = @_; + if ($etype) { + $etype = [$etype] unless ref $etype; + confess "$objname expected @$etype but is $gtype" + unless grep { $gtype eq $_ } @$etype; + } + return ($gtype, $data); + }; if (!$gcf_pid) { my @cmd = qw(git cat-file --batch); debugcmd "GCF|", @cmd; @@ -362,13 +460,26 @@ sub git_cat_file ($) { print $gcf_i $objname, "\n" or die $!; my $x = <$gcf_o>; printdebug "GCF<| ", $x; - if ($x =~ m/ (missing)$/) { return ($1, undef); } + if ($x =~ m/ (missing)$/) { return $chk->($1, undef); } my ($type, $size) = $x =~ m/^.* (\w+) (\d+)\n/ or die "$objname ?"; my $data; (read $gcf_o, $data, $size) == $size or die "$objname $!"; $x = <$gcf_o>; $x eq "\n" or die "$objname ($_) $!"; - return ($type, $data); + return $chk->($type, $data); +} + +sub git_get_symref (;$) { + my ($symref) = @_; $symref //= 'HEAD'; + # => undef if not a symref, otherwise refs/... + my @cmd = (qw(git symbolic-ref -q HEAD)); + my $branch = cmdoutput_errok @cmd; + if (!defined $branch) { + $?==256 or failedcmd @cmd; + } else { + chomp $branch; + } + return $branch; } sub git_for_each_ref ($$;$) { @@ -418,6 +529,25 @@ sub git_for_each_tag_referring ($$) { }); } +sub git_check_unmodified () { + foreach my $cached (qw(0 1)) { + my @cmd = qw(git diff --quiet); + push @cmd, qw(--cached) if $cached; + push @cmd, qw(HEAD); + debugcmd "+",@cmd; + $!=0; $?=-1; system @cmd; + return if !$?; + if ($?==256) { + fail + $cached + ? "git index contains changes (does not match HEAD)" + : "working tree is dirty (does not match HEAD)"; + } else { + failedcmd @cmd; + } + } +} + sub is_fast_fwd ($$) { my ($ancestor,$child) = @_; my @cmd = (qw(git merge-base), $ancestor, $child); @@ -430,6 +560,21 @@ sub is_fast_fwd ($$) { } } +sub git_reflog_action_msg ($) { + my ($msg) = @_; + my $rla = $ENV{GIT_REFLOG_ACTION}; + $msg = "$rla: $msg" if length $rla; + return $msg; +} + +sub git_update_ref_cmd { + # returns qw(git update-ref), qw(-m), @_ + # except that message may be modified to honour GIT_REFLOG_ACTION + my $msg = shift @_; + $msg = git_reflog_action_msg $msg; + return qw(git update-ref -m), $msg, @_; +} + sub changedir ($) { my ($newdir) = @_; printdebug "CD $newdir\n"; @@ -460,12 +605,184 @@ sub git_slurp_config_src ($) { return $r; } +sub gdr_ffq_prev_branchinfo ($) { + my ($symref) = @_; + # => ('status', "message", [$symref, $ffq_prev, $gdrlast]) + # 'status' may be + # branch message is undef + # weird-symref } no $symref, + # notbranch } no $ffq_prev + return ('detached', 'detached HEAD') unless defined $symref; + return ('weird-symref', 'HEAD symref is not to refs/') + unless $symref =~ m{^refs/}; + my $ffq_prev = "refs/$ffq_refprefix/$'"; + my $gdrlast = "refs/$gdrlast_refprefix/$'"; + printdebug "ffq_prev_branchinfo branch current $symref\n"; + return ('branch', undef, $symref, $ffq_prev, $gdrlast); +} + +sub parsecontrolfh ($$;$) { + my ($fh, $desc, $allowsigned) = @_; + our $dpkgcontrolhash_noissigned; + my $c; + for (;;) { + my %opts = ('name' => $desc); + $opts{allow_pgp}= $allowsigned || !$dpkgcontrolhash_noissigned; + $c = Dpkg::Control::Hash->new(%opts); + $c->parse($fh,$desc) or die "parsing of $desc failed"; + last if $allowsigned; + last if $dpkgcontrolhash_noissigned; + my $issigned= $c->get_option('is_pgp_signed'); + if (!defined $issigned) { + $dpkgcontrolhash_noissigned= 1; + seek $fh, 0,0 or die "seek $desc: $!"; + } elsif ($issigned) { + fail "control file $desc is (already) PGP-signed. ". + " Note that dgit push needs to modify the .dsc and then". + " do the signature itself"; + } else { + last; + } + } + return $c; +} + +sub parsecontrol { + my ($file, $desc, $allowsigned) = @_; + my $fh = new IO::Handle; + open $fh, '<', $file or die "$file: $!"; + my $c = parsecontrolfh($fh,$desc,$allowsigned); + $fh->error and die $!; + close $fh; + return $c; +} + +sub parsechangelog { + my $c = Dpkg::Control::Hash->new(name => 'parsed changelog'); + my $p = new IO::Handle; + my @cmd = (qw(dpkg-parsechangelog), @_); + open $p, '-|', @cmd or die $!; + $c->parse($p); + $?=0; $!=0; close $p or failedcmd @cmd; + return $c; +} + +sub getfield ($$) { + my ($dctrl,$field) = @_; + my $v = $dctrl->{$field}; + return $v if defined $v; + fail "missing field $field in ".$dctrl->get_option('name'); +} + +sub parsechangelog_loop ($$$) { + my ($clogcmd, $descbase, $fn) = @_; + # @$clogcmd is qw(dpkg-parsechangelog ...some...options...) + # calls $fn->($thisstanza, $desc); + debugcmd "|",@$clogcmd; + open CLOGS, "-|", @$clogcmd or die $!; + for (;;) { + my $stanzatext = do { local $/=""; ; }; + printdebug "clogp stanza ".Dumper($stanzatext) if $debuglevel>1; + last if !defined $stanzatext; + + my $desc = "$descbase, entry no.$."; + open my $stanzafh, "<", \$stanzatext or die; + my $thisstanza = parsecontrolfh $stanzafh, $desc, 1; + + $fn->($thisstanza, $desc); + } + die $! if CLOGS->error; + close CLOGS or $?==SIGPIPE or failedcmd @$clogcmd; +} + +sub make_commit_text ($) { + my ($text) = @_; + my ($out, $in); + my @cmd = (qw(git hash-object -w -t commit --stdin)); + debugcmd "|",@cmd; + print Dumper($text) if $debuglevel > 1; + my $child = open2($out, $in, @cmd) or die $!; + my $h; + eval { + print $in $text or die $!; + close $in or die $!; + $h = <$out>; + $h =~ m/^\w+$/ or die; + $h = $&; + printdebug "=> $h\n"; + }; + close $out; + waitpid $child, 0 == $child or die "$child $!"; + $? and failedcmd @cmd; + return $h; +} + +sub reflog_cache_insert ($$$) { + my ($ref, $cachekey, $value) = @_; + # you must call this in $maindir + # you must have called record_maindir + + # When we no longer need to support squeeze, use --create-reflog + # instead of this: + my $parent = $ref; $parent =~ s{/[^/]+$}{}; + ensuredir "$maindir_gitcommon/logs/$parent"; + my $makelogfh = new IO::File "$maindir_gitcommon/logs/$ref", '>>' + or die $!; + + my $oldcache = git_get_ref $ref; + + if ($oldcache eq $value) { + my $tree = cmdoutput qw(git rev-parse), "$value:"; + # git update-ref doesn't always update, in this case. *sigh* + my $authline = (ucfirst _us()). + ' <'._us().'@example.com> 1000000000 +0000'; + my $dummy = make_commit_text <(no reflog)\n"; + finish 0; + } + exec @cmd; die $!; + } + while () { + chomp; + printdebug ">| ", $_, "\n" if $debuglevel > 1; + next unless m/^(\w+) (\S.*\S)$/ && $2 eq $cachekey; + close GC; + return $1; + } + die $! if GC->error; + failedcmd unless close GC; + return undef; +} + # ========== playground handling ========== # terminology: # # $maindir user's git working tree -# $playground area in .git/ where we can make files, unpack, etc. etc. +# playground area in .git/ where we can make files, unpack, etc. etc. # playtree git working tree sharing object store with the user's # inside playground, or identical to it # @@ -485,36 +802,29 @@ sub git_slurp_config_src ($) { # # fresh_playground SUBDIR_PATH_COMPONENTS # e.g fresh_playground 'dgit/unpack' ('.git/' is implied) -# default SUBDIR_PATH_COMPONENTS is $playground_subdir +# default SUBDIR_PATH_COMPONENTS is playground_subdir # calls record_maindir # sets up a new playground (destroying any old one) -# assigns to $playground and returns the same pathname +# returns playground pathname # caller may call multiple times with different subdir paths -# createing different playgrounds; but $playground global can -# refer only to one, obv. +# createing different playgrounds # # ensure_a_playground SUBDIR_PATH_COMPONENTS # like fresh_playground except: # merely ensures the directory exists; does not delete an existing one -# never sets global $playground # # then can use # -# changedir $playground +# changedir playground # changedir $maindir # # playtree_setup $local_git_cfg -# # ^ call in some (perhaps trivial) subdir of $playground +# # ^ call in some (perhaps trivial) subdir of playground # -# rmtree $playground +# rmtree playground # ----- maindir ----- -# these three all go together -our $maindir; -our $maindir_gitdir; -our $maindir_gitcommon; - our $local_git_cfg; sub record_maindir () { @@ -538,12 +848,10 @@ sub record_maindir () { # ----- playgrounds ----- -our $playground; - sub ensure_a_playground_parent ($) { my ($spc) = @_; record_maindir(); - $spc = ".git/$spc"; + $spc = "$maindir_gitdir/$spc"; my $parent = dirname $spc; mkdir $parent or $!==EEXIST or fail "failed to mkdir playground parent $parent: $!"; @@ -561,8 +869,8 @@ sub fresh_playground ($) { my ($spc) = @_; $spc = ensure_a_playground_parent $spc; rmtree $spc; - mkdir $spc or die "$spc $!"; - return $playground = "$maindir/$spc"; + mkdir $spc or fail "failed to mkdir the playground $spc: $!"; + return $spc; } # ----- playtrees ----- @@ -582,8 +890,13 @@ sub playtree_setup (;$) { next unless $v; runcmd qw(git config), $copy, $_ foreach @$v; } + # this is confusing: we have + # . playtree, not a worktree, has .git/, our cwd + # $maindir might be a worktree so + # $maindir_gitdir contains our main working "dgit", HEAD, etc. + # $maindir_gitcommon the shared stuff, including .objects rmtree('.git/objects'); - symlink "$maindir/.git/objects",'.git/objects' or die $!; + symlink "$maindir_gitcommon/objects",'.git/objects' or die $!; ensuredir '.git/info'; open GA, "> .git/info/attributes" or die $!; print GA "* $negate_harmful_gitattrs\n" or die $!;