X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=dgit.git;a=blobdiff_plain;f=Debian%2FDgit.pm;h=2bac4859f887ee5a17788755e00cfa5537503669;hp=c4a61af1f081b62f21938ac86783a0deef000286;hb=11c8c965c3419fddf2444a7497b45b65f05d3db5;hpb=e4130d897958102a5be89236ac79372bbf688708 diff --git a/Debian/Dgit.pm b/Debian/Dgit.pm index c4a61af1..2bac4859 100644 --- a/Debian/Dgit.pm +++ b/Debian/Dgit.pm @@ -44,28 +44,33 @@ BEGIN { 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_update_ref_cmd $package_re $component_re $deliberately_re $distro_re $versiontag_re $series_filename_re + $extra_orig_namepart_re + $git_null_obj $branchprefix + $ffq_refprefix $gdrlast_refprefix initdebug enabledebug enabledebuglevel printdebug debugcmd $debugprefix *debuglevel *DEBUG shellquote printcmd messagequote $negate_harmful_gitattrs changedir git_slurp_config_src + gdr_ffq_prev_branchinfo 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 +85,10 @@ 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 $git_null_obj = '0' x 40; +our $ffq_refprefix = 'ffq-prev'; +our $gdrlast_refprefix = 'debrebase-last'; # policy hook exit status bits # see dgit-repos-server head comment for documentation @@ -92,7 +101,9 @@ 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 +119,7 @@ sub forkcheck_mainprocess () { sub setup_sigwarn () { forkcheck_setup(); $SIG{__WARN__} = sub { - die $_[0] if forkcheck_mainprocess; + confess $_[0] if forkcheck_mainprocess; }; } @@ -213,12 +224,16 @@ sub _us () { $::us // ($0 =~ m#[^/]*$#, $&); } -sub fail { - my $s = "@_\n"; +sub failmsg { + my $s = "error: @_\n"; $s =~ s/\n\n$/\n/; my $prefix = _us().": "; $s =~ s/^/$prefix/gm; - die $s; + return "\n".$s; +} + +sub fail { + die failmsg @_; } sub ensuredir ($) { @@ -300,6 +315,11 @@ sub runcmd { failedcmd @_ if system @_; } +sub shell_cmd { + my ($first_shell, @cmd) = @_; + return qw(sh -ec), $first_shell.'; exec "$@"', 'x', @cmd; +} + sub cmdoutput_errok { confess Dumper(\@_)." ?" if grep { !defined } @_; debugcmd "|",@_; @@ -348,11 +368,21 @@ 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); + 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 +392,26 @@ 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 ($$;$) { @@ -418,6 +461,25 @@ sub git_for_each_tag_referring ($$) { }); } +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 ($$) { my ($ancestor,$child) = @_; my @cmd = (qw(git merge-base), $ancestor, $child); @@ -430,6 +492,13 @@ sub is_fast_fwd ($$) { } } +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 @_; + return qw(git update-ref -m), $msg, @_; +} + sub changedir ($) { my ($newdir) = @_; printdebug "CD $newdir\n"; @@ -460,12 +529,28 @@ sub git_slurp_config_src ($) { 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); +} + # ========== playground handling ========== # terminology: # # $maindir user's git working tree -# $playground area in .git/ where we can make files, unpack, etc. etc. +# playground area in .git/ where we can make files, unpack, etc. etc. # playtree git working tree sharing object store with the user's # inside playground, or identical to it # @@ -485,28 +570,26 @@ sub git_slurp_config_src ($) { # # 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 ----- @@ -538,8 +621,6 @@ sub record_maindir () { # ----- playgrounds ----- -our $playground; - sub ensure_a_playground_parent ($) { my ($spc) = @_; record_maindir(); @@ -562,7 +643,7 @@ sub fresh_playground ($) { $spc = ensure_a_playground_parent $spc; rmtree $spc; mkdir $spc or fail "failed to mkdir the playground $spc: $!"; - return $playground = $spc; + return $spc; } # ----- playtrees -----