X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=dgit.git;a=blobdiff_plain;f=git-debrebase;h=f79aef5ff2241478bb98e452fe134d30492208a1;hp=403fba1ba6bc458099849df521b7d6ebff88e660;hb=2e4434dbec72dd4a042d2fc3beab9db88943b2c8;hpb=6122e79e9fe147a285cd98aa938de6c1f024a0c3 diff --git a/git-debrebase b/git-debrebase index 403fba1b..f79aef5f 100755 --- a/git-debrebase +++ b/git-debrebase @@ -18,66 +18,6 @@ # You should have received a copy of the GNU General Public License # along with this program. If not, see . - -# usages: -# -# git-debrebase [] new-upstream-v0 \ -# \ -# [ ...] \ -# [...] -# -# git-debrebase [ --] [] -# git-debrebase [] analyse -# git-debrebase [] breakwater # prints breakwater tip only -# git-debrebase [] launder # prints breakwater tip etc. -# git-debrebase [] stitch [--prose=] -# git-debrebase [] downstream-rebase-launder-v0 # experimental -# -# git-debrebase [] convert-from-gbp [] -# git-debrebase [] convert-to-gbp - -# problems / outstanding questions: -# -# * dgit push with a `3.0 (quilt)' package means doing quilt -# fixup. Usually this involves recommitting the whole patch -# series, one at a time, with dpkg-source --commit. This is -# terribly terribly slow. (Maybe this should be fixed in dgit.) -# -# * dgit push usually needs to (re)make a pseudomerge. The "first" -# git-debrebase stripped out the previous pseudomerge and could -# have remembeed the HEAD. But it's not quite clear what history -# ought to be preserved and what should be discarded. For now -# the user will have to tell dgit --overwrite. -# -# To fix this, do we need a new push hook for dgit ? -# -# * Workflow is currently clumsy. Lots of spurious runes to type. -# There's not even a guide. -# -# * There are no tests. -# -# * new-upstream-v0 has a terrible UI. You end up with giant -# runic command lines. -# -# One consequence of the lack of richness it can need --force in -# fairly sensible situations and there is no way to tell it what -# you are really trying to do, other than just --force. There -# should be an interface with some default branch names. -# -# * There should be a standard convention for the version number, -# and unfinalised or not changelog, after new-upstream. -# -# * Handing of multi-orig dgit new-upstream .dsc imports is known to -# be broken. They may be not recognised, improperly converted, or -# their conversion may be unrecognised. -# -# * Docs need writing and updating. Even README.git-debrebase -# describes a design but may not reflect the implementation. -# -# * We need to develop a plausible model that works for derivatives, -# who probably want to maintain their stack on top of Debian's. -# downstream-rebase-launder-v0 may be a starting point? - use strict; use Debian::Dgit qw(:DEFAULT :playground); @@ -91,7 +31,7 @@ use Getopt::Long qw(:config posix_default gnu_compat bundling); use Dpkg::Version; use File::FnMatch qw(:fnmatch); -our ($opt_force, $opt_noop_ok); +our ($opt_force, $opt_noop_ok, @opt_anchors); our $us = qw(git-debrebase); @@ -157,6 +97,28 @@ sub fresh_workarea () { in_workarea sub { playtree_setup }; } +our @deferred_updates; +our @deferred_update_messages; + +sub run_deferred_updates ($) { + my ($mrest) = @_; + + my @upd_cmd = (@git, qw(update-ref --stdin -m), "debrebase: $mrest"); + debugcmd '>|', @upd_cmd; + open U, "|-", @upd_cmd or die $!; + foreach (@deferred_updates) { + printdebug ">= ", $_, "\n"; + print U $_, "\n" or die $!; + } + printdebug ">\$\n"; + close U or failedcmd @upd_cmd; + + print $_, "\n" foreach @deferred_update_messages; + + @deferred_updates = (); + @deferred_update_messages = (); +} + sub get_differs ($$) { my ($x,$y) = @_; # This resembles quiltify_trees_differ, in dgit, a bit. @@ -330,10 +292,14 @@ sub any_fproblems () { # has additional entry in classification result # OrigParents = [ subset of Parents ] # -# BreakwaterUpstreamMerge +# Anchor # has additional entry in classification result # OrigParents = [ subset of Parents ] # singleton list # +# TreatAsAnchor +# +# BreakwaterStart +# # Unknown # has additional entry in classification result # Why => "prose" @@ -400,13 +366,57 @@ sub classify ($) { return $r; }; - my $claims_to_be_breakwater = - $r->{Msg} =~ m{^\[git-debrebase breakwater.*\]$}m; + if (grep { $_ eq $objid } @opt_anchors) { + return $classify->('TreatAsAnchor'); + } + + my @identical = grep { !$_->{Differs} } @p; + my ($stype, $series) = git_cat_file "$t:debian/patches/series"; + my $haspatches = $stype ne 'missing' && $series =~ m/^\s*[^#\n\t ]/m; + + if ($r->{Msg} =~ m{^\[git-debrebase anchor.*\]$}m) { + # multi-orig upstreams are represented with an anchor merge + # from a single upstream commit which combines the orig tarballs + + # Every anchor tagged this way must be a merge. + # We are relying on the + # [git-debrebase anchor: ...] + # commit message annotation in "declare" anchor merges (which + # do not have any upstream changes), to distinguish those + # anchor merges from ordinary pseudomerges (which we might + # just try to strip). + # + # However, the user is going to be doing git-rebase a lot. We + # really don't want them to rewrite an anchor commit. + # git-rebase trips up on merges, so that is a useful safety + # catch. + # + # BreakwaterStart commits are also anchors in the terminology + # of git-debrebase(5), but they are untagged (and always + # manually generated). + + my $badanchor = sub { $unknown->("git-debrebase \`anchor' but @_"); }; + @p == 2 or return $badanchor->("has other than two parents"); + $haspatches and return $badanchor->("contains debian/patches"); + + # How to decide about l/r ordering of anchors ? git + # --topo-order prefers to expand 2nd parent first. There's + # already an easy rune to look for debian/ history anyway (git log + # debian/) so debian breakwater branch should be 1st parent; that + # way also there's also an easy rune to look for the upstream + # patches (--topo-order). + + $p[0]{IsOrigin} and $badanchor->("is an origin commit"); + $p[1]{Differs} & ~DS_DEB and + $badanchor->("upstream files differ from left parent"); + $p[0]{Differs} & ~D_UPS and + $badanchor->("debian/ differs from right parent"); + + return $classify->(qw(Anchor), + OrigParents => [ $p[1] ]); + } if (@p == 1) { - if ($claims_to_be_breakwater) { - return $unknown->("single-parent git-debrebase breakwater \`merge'"); - } my $d = $r->{Parents}[0]{Differs}; if ($d == D_PAT_ADD) { return $classify->(qw(AddPatches)); @@ -439,11 +449,7 @@ sub classify ($) { return $unknown->("origin commit"); } - my @identical = grep { !$_->{Differs} } @p; - if (@p == 2 && @identical == 1 && !$claims_to_be_breakwater - # breakwater merges can look like pseudomerges, if they are - # "declare" commits (ie, there are no upstream changes) - ) { + if (@p == 2 && @identical == 1) { my @overwritten = grep { $_->{Differs} } @p; confess "internal error $objid ?" unless @overwritten==1; return $classify->(qw(Pseudomerge), @@ -485,47 +491,22 @@ sub classify ($) { OrigParents => \@orig_ps); } - my ($stype, $series) = git_cat_file "$t:debian/patches/series"; - my $haspatches = $stype ne 'missing' && $series =~ m/^\s*[^#\n\t ]/m; - - # How to decide about l/r ordering of breakwater merges ? git - # --topo-order prefers to expand 2nd parent first. There's - # already an easy rune to look for debian/ history anyway (git log - # debian/) so debian breakwater branch should be 1st parent; that - # way also there's also an easy rune to look for the upstream - # patches (--topo-order). - - # The above tells us which way *we* will generate them. But we - # might encounter ad-hoc breakwater merges generated manually, - # which might be the other way around. In principle, in some odd - # situations, a breakwater merge might have two identical parents. - # In that case we guess which way round it is (ie, which parent - # has the upstream history). The order of the 2-iteration loop - # controls which guess we make. - - foreach my $prevbrw (qw(0 1)) { - if (@p == 2 && - !$haspatches && - !$p[$prevbrw]{IsOrigin} && # breakwater never starts with an origin - !($p[!$prevbrw]{Differs} & ~DS_DEB) && # no non-debian changess - !($p[$prevbrw]{Differs} & ~D_UPS)) { # no non-upstream changes - return $classify->(qw(BreakwaterUpstreamMerge), - OrigParents => [ $p[!$prevbrw] ]); - } - } - - # multi-orig upstreams are represented with a breakwater merge - # from a single upstream commit which combines the orig tarballs - return $unknown->("complex merge"); } -sub breakwater_of ($) { - my ($head) = @_; # must be laundered +sub breakwater_of ($;$) { + my ($head, $unclean_fproblem_tag) = @_; + # $head should be laundered; if not, $unclean_fproblem_tag controls: + # if falseish, calls fail; otherwise, calls fproblem and returns undef my $breakwater; my $unclean = sub { my ($why) = @_; - fail "branch needs laundering (run git-debrebase): $why"; + my $m = "branch needs laundering (run git-debrebase): $why"; + fail $m unless $unclean_fproblem_tag; + fproblem $unclean_fproblem_tag, $m; + $breakwater = undef; + no warnings qw(exiting); + last; }; for (;;) { my $cl = classify $head; @@ -533,7 +514,8 @@ sub breakwater_of ($) { if ($ty eq 'Packaging' or $ty eq 'Changelog') { $breakwater //= $head; - } elsif ($ty eq 'BreakwaterUpstreamMerge' or + } elsif ($ty eq 'Anchor' or + $ty eq 'TreatAsAnchor' or $ty eq 'BreakwaterStart') { $breakwater //= $head; last; @@ -560,7 +542,7 @@ sub walk ($;$$); sub walk ($;$$) { my ($input, $nogenerate,$report) = @_; - # => ($tip, $breakwater_tip, $last_upstream_merge_in_breakwater) + # => ($tip, $breakwater_tip, $last_anchor) # (or nothing, if $nogenerate) printdebug "*** WALK $input ".($nogenerate//0)." ".($report//'-')."\n"; @@ -583,8 +565,9 @@ sub walk ($;$$) { return (Msg => $ms); }; my $rewrite_from_here = sub { + my ($cl) = @_; my $sp_cl = { SpecialMethod => 'StartRewrite' }; - push @brw_cl, $sp_cl; + push @$cl, $sp_cl; push @processed, $sp_cl; }; my $cur = $input; @@ -622,7 +605,7 @@ sub walk ($;$$) { no warnings qw(exiting); last; }; - my $last_upstream_update; + my $last_anchor; for (;;) { $cl = classify $cur; @@ -634,14 +617,14 @@ sub walk ($;$$) { my $p0 = @{ $cl->{Parents} }==1 ? $cl->{Parents}[0]{CommitId} : undef; if ($ty eq 'AddPatches') { $cur = $p0; - $rewrite_from_here->(); + $rewrite_from_here->(\@upp_cl); next; } elsif ($ty eq 'Packaging' or $ty eq 'Changelog') { push @brw_cl, $cl; $cur = $p0; next; } elsif ($ty eq 'BreakwaterStart') { - $last_upstream_update = $cur; + $last_anchor = $cur; $build_start->('FirstPackaging', $cur); } elsif ($ty eq 'Upstream') { push @upp_cl, $cl; @@ -655,19 +638,19 @@ sub walk ($;$$) { }; $queue->(\@brw_cl, "debian"); $queue->(\@upp_cl, "upstream"); - $rewrite_from_here->(); + $rewrite_from_here->(\@brw_cl); $cur = $p0; next; } elsif ($ty eq 'Pseudomerge') { my $contrib = $cl->{Contributor}{CommitId}; print $report " Contributor=$contrib" if $report; push @pseudomerges, $cl; - $rewrite_from_here->(); + $rewrite_from_here->(\@upp_cl); $cur = $contrib; next; - } elsif ($ty eq 'BreakwaterUpstreamMerge') { - $last_upstream_update = $cur; - $build_start->("PreviousBreakwater", $cur); + } elsif ($ty eq 'Anchor' or $ty eq 'TreatAsAnchor') { + $last_anchor = $cur; + $build_start->("Anchor", $cur); } elsif ($ty eq 'DgitImportUnpatched') { my $pm = $pseudomerges[-1]; if (defined $pm) { @@ -708,10 +691,10 @@ sub walk ($;$$) { %$cl, SpecialMethod => 'DgitImportUpstreamUpdate', $xmsg->("convert dgit import: upstream update", - " breakwater") + " anchor") }; $prline->(" Import"); - $rewrite_from_here->(); + $rewrite_from_here->(\@brw_cl); $upp_limit //= $#upp_cl; # further, deeper, patches discarded $cur = $ovwr; next; @@ -829,7 +812,7 @@ sub walk ($;$$) { confess "$ch ?" unless $rewriting or $newcommit eq $cl->{CommitId}; $build = $newcommit; if (grep { $method eq $_ } qw(DgitImportUpstreamUpdate)) { - $last_upstream_update = $cur; + $last_anchor = $cur; } } }; @@ -838,7 +821,7 @@ sub walk ($;$$) { die sprintf "internal error %#x %s %s", $final_check, $build, $input if $final_check & ~D_PAT_ADD; - my @r = ($build, $breakwater, $last_upstream_update); + my @r = ($build, $breakwater, $last_anchor); printdebug "*** WALK RETURN @r\n"; return @r } @@ -850,7 +833,8 @@ sub get_head () { sub update_head ($$$) { my ($old, $new, $mrest) = @_; - runcmd @git, qw(update-ref -m), "debrebase: $mrest", 'HEAD', $new, $old; + push @deferred_updates, "update HEAD $new $old"; + run_deferred_updates $mrest; } sub update_head_checkout ($$$) { @@ -868,24 +852,19 @@ sub update_head_postlaunder ($$$) { runcmd @git, qw(rm --quiet --ignore-unmatch -rf debian/patches); } -sub cmd_launder () { - badusage "no arguments to launder allowed" if @ARGV; +sub cmd_launder_v0 () { + badusage "no arguments to launder-v0 allowed" if @ARGV; my $old = get_head(); - my ($tip,$breakwater,$last_upstream_merge) = walk $old; + my ($tip,$breakwater,$last_anchor) = walk $old; update_head_postlaunder $old, $tip, 'launder'; printf "# breakwater tip\n%s\n", $breakwater; printf "# working tip\n%s\n", $tip; - printf "# last upstream merge\n%s\n", $last_upstream_merge; + printf "# last anchor\n%s\n", $last_anchor; } sub defaultcmd_rebase () { my $old = get_head(); - my ($status, $message) = record_ffq_prev(); - if ($status eq 'written' || $status eq 'exists') { - } else { - fproblem $status, "could not record ffq-prev: $message"; - fproblems_maybe_bail(); - } + record_ffq_auto(); my ($tip,$breakwater) = walk $old; update_head_postlaunder $old, $tip, 'launder for rebase'; runcmd @git, qw(rebase), @ARGV, $breakwater; @@ -905,7 +884,7 @@ sub cmd_analyse () { } sub ffq_prev_branchinfo () { - # => ('status', "message", [$current, $ffq_prev]) + # => ('status', "message", [$current, $ffq_prev, $drlast]) # 'status' may be # branch message is undef # weird-symref } no $current, @@ -915,21 +894,25 @@ sub ffq_prev_branchinfo () { return ('weird-symref', 'HEAD symref is not to refs/') unless $current =~ m{^refs/}; my $ffq_prev = "refs/$ffq_refprefix/$'"; - return ('branch', undef, $current, $ffq_prev); + my $drlast = "refs/$gdrlast_refprefix/$'"; + printdebug "ffq_prev_branchinfo branch current $current\n"; + return ('branch', undef, $current, $ffq_prev, $drlast); } -sub record_ffq_prev () { +sub record_ffq_prev_deferred () { # => ('status', "message") # 'status' may be - # written message is undef + # deferred message is undef # exists # detached # weird-symref # notbranch # if not ff from some branch we should be ff from, is an fproblem - # if "written", will have printed something about that to stdout, - # and also some messages about ff checks - my ($status, $message, $current, $ffq_prev) = ffq_prev_branchinfo(); + # if "deferred", will have added something about that to + # @deferred_update_messages, and also maybe printed (already) + # some messages about ff checks + my ($status, $message, $current, $ffq_prev, $drlast) + = ffq_prev_branchinfo(); return ($status, $message) unless $status eq 'branch'; my $currentval = get_head(); @@ -944,12 +927,15 @@ sub record_ffq_prev () { my @check_specs = split /\;/, (cfg "branch.$branch.ffq-ffrefs",1) // '*'; my %checked; + printdebug "ffq check_specs @check_specs\n"; + my $check = sub { my ($lrref, $desc) = @_; + printdebug "ffq might check $lrref ($desc)\n"; my $invert; for my $chk (@check_specs) { my $glob = $chk; - $invert = $glob =~ s{^[^!]}{}; + $invert = $glob =~ s{^[!^]}{}; last if fnmatch $glob, $lrref; } return if $invert; @@ -959,7 +945,7 @@ sub record_ffq_prev () { if (is_fast_fwd $lrval, $currentval) { print "OK, you are ahead of $lrref\n" or die $!; $checked{$lrref} = 1; - } if (is_fast_fwd $currentval, $lrval) { + } elsif (is_fast_fwd $currentval, $lrval) { $checked{$lrref} = -1; fproblem 'behind', "you are behind $lrref, divergence risk"; } else { @@ -969,30 +955,42 @@ sub record_ffq_prev () { }; my $merge = cfg "branch.$branch.merge",1; - if (defined $merge && $merge =~ m{^refs/heads/}) { + if (defined $merge and $merge =~ m{^refs/heads/}) { my $rhs = $'; + printdebug "ffq merge $rhs\n"; my $check_remote = sub { - my ($remote, $desc) = (@_); + my ($remote, $desc) = @_; + printdebug "ffq check_remote ".($remote//'undef')." $desc\n"; return unless defined $remote; $check->("refs/remotes/$remote/$rhs", $desc); }; - $check_remote->((cfg "branch.$branch.remote",1), + $check_remote->((scalar cfg "branch.$branch.remote",1), 'remote fetch/merge branch'); - $check_remote->((cfg "branch.$branch.pushRemote",1) // - (cfg "branch.$branch.pushDefault",1), + $check_remote->((scalar cfg "branch.$branch.pushRemote",1) // + (scalar cfg "branch.$branch.pushDefault",1), 'remote push branch'); } if ($branch =~ m{^dgit/}) { - $check->("remotes/dgit/$branch", 'remote dgit branch'); + $check->("refs/remotes/dgit/$branch", 'remote dgit branch'); } elsif ($branch =~ m{^master$}) { - $check->("remotes/dgit/dgit/sid", 'remote dgit branch for sid'); + $check->("refs/remotes/dgit/dgit/sid", 'remote dgit branch for sid'); } fproblems_maybe_bail(); - runcmd @git, qw(update-ref -m), "record current head for preservation", - $ffq_prev, $currentval, $git_null_obj; - print "Recorded current head for preservation\n" or die $!; - return ('written', undef); + + push @deferred_updates, "update $ffq_prev $currentval $git_null_obj"; + push @deferred_updates, "delete $drlast"; + push @deferred_update_messages, "Recorded current head for preservation"; + return ('deferred', undef); +} + +sub record_ffq_auto () { + my ($status, $message) = record_ffq_prev_deferred(); + if ($status eq 'deferred' || $status eq 'exists') { + } else { + fproblem $status, "could not record ffq-prev: $message"; + fproblems_maybe_bail(); + } } sub cmd_new_upstream_v0 () { @@ -1001,13 +999,15 @@ sub cmd_new_upstream_v0 () { my %pieces; - badusage "need NEW-VERSION UPS-COMMITTISH" unless @ARGV >= 2; + badusage "need NEW-VERSION [UPS-COMMITTISH]" unless @ARGV >= 1; # parse args - low commitment my $new_version = (new Dpkg::Version scalar(shift @ARGV), check => 1); my $new_upstream_version = $new_version->version(); - my $new_upstream = git_rev_parse shift @ARGV; + my $new_upstream = git_rev_parse (shift @ARGV // 'upstream'); + + record_ffq_auto(); my $piece = sub { my ($n, @x) = @_; # may be '' @@ -1044,17 +1044,21 @@ sub cmd_new_upstream_v0 () { # now we need to investigate the branch this generates the # laundered version but we don't switch to it yet my $old_head = get_head(); - my ($old_laundered_tip,$old_bw,$old_upstream_update) = walk $old_head; + my ($old_laundered_tip,$old_bw,$old_anchor) = walk $old_head; my $old_bw_cl = classify $old_bw; - my $old_upstream_update_cl = classify $old_upstream_update; - confess unless $old_upstream_update_cl->{OrigParents}; - my $old_upstream = parsecommit - $old_upstream_update_cl->{OrigParents}[0]{CommitId}; - - $piece->('', Old => $old_upstream->{CommitId}); + my $old_anchor_cl = classify $old_anchor; + my $old_upstream; + if (!$old_anchor_cl->{OrigParents}) { + fproblem 'anchor-treated', + 'old anchor is recognised due to --anchor, cannot check upstream'; + } else { + $old_upstream = parsecommit + $old_anchor_cl->{OrigParents}[0]{CommitId}; + $piece->('', Old => $old_upstream->{CommitId}); + } - if ($old_upstream->{Msg} =~ m{^\[git-debrebase }m) { + if ($old_upstream && $old_upstream->{Msg} =~ m{^\[git-debrebase }m) { if ($old_upstream->{Msg} =~ m{^\[git-debrebase upstream-combine \.((?: $extra_orig_namepart_re)+)\:.*\]$}m ) { @@ -1072,7 +1076,9 @@ sub cmd_new_upstream_v0 () { } foreach my $pc (values %pieces) { - if (!$pc->{Old}) { + if (!$old_upstream) { + # we have complained already + } elsif (!$pc->{Old}) { fproblem 'upstream-new-piece', "introducing upstream piece \`$pc->{Name}'"; } elsif (!$pc->{New}) { @@ -1122,14 +1128,14 @@ sub cmd_new_upstream_v0 () { # $new_upstream is either the single upstream commit, or the # combined commit we just made. Either way it will be the - # "upstream" parent of the breakwater special merge. + # "upstream" parent of the anchor merge. read_tree_subdir 'debian', "$old_bw:debian"; - # index now contains the breakwater merge contents + # index now contains the anchor merge contents $new_bw = make_commit [ $old_bw, $new_upstream ], [ "Update to upstream $new_upstream_version", - "[git-debrebase breakwater: new upstream $new_upstream_version, merge]", + "[git-debrebase anchor: new upstream $new_upstream_version, merge]", ]; # Now we have to add a changelog stanza so the Debian version @@ -1175,10 +1181,11 @@ END sub cmd_record_ffq_prev () { badusage "no arguments allowed" if @ARGV; - my ($status, $msg) = record_ffq_prev(); + my ($status, $msg) = record_ffq_prev_deferred(); if ($status eq 'exists' && $opt_noop_ok) { print "Previous head already recorded\n" or die $!; - } elsif ($status eq 'written') { + } elsif ($status eq 'deferred') { + run_deferred_updates 'record-ffq-prev'; } else { fail "Could not preserve: $msg"; } @@ -1194,7 +1201,8 @@ sub cmd_stitch () { my $prose = ''; GetOptions('prose=s', \$prose) or die badusage("bad options to stitch"); badusage "no arguments allowed" if @ARGV; - my ($status, $message, $current, $ffq_prev) = ffq_prev_branchinfo(); + my ($status, $message, $current, $ffq_prev, $drlast) + = ffq_prev_branchinfo(); if ($status ne 'branch') { fproblem $status, "could not check ffq-prev: $message"; fproblems_maybe_bail(); @@ -1203,23 +1211,27 @@ sub cmd_stitch () { if (!$prev) { fail "No ffq-prev to stitch." unless $opt_noop_ok; } - fresh_workarea(); + push @deferred_updates, "delete $ffq_prev $prev"; + my $old_head = get_head(); + if (is_fast_fwd $old_head, $prev) { + my $differs = get_differs $old_head, $prev; + unless ($differs & ~D_PAT_ADD) { + # ffq-prev is ahead of us, and the only tree changes it has + # are possibly addition of things in debian/patches/. + # Just wind forwards rather than making a pointless pseudomerge. + push @deferred_updates, "update $drlast $prev $git_null_obj"; + update_head_checkout $old_head, $prev, "stitch (fast forward)"; + return; + } + } + fresh_workarea(); my $new_head = make_commit [ $old_head, $ffq_prev ], [ 'Declare fast forward / record previous work', "[git-debrebase pseudomerge: stitch$prose]", ]; - my @upd_cmd = (@git, qw(update-ref --stdin)); - debugcmd '>|', @upd_cmd; - open U, "|-", @upd_cmd or die $!; - my $u = <= ", $_, "\n" foreach split /\n/, $u; - print U $u; - printdebug ">\$\n"; - close U or failedcmd @upd_cmd; + push @deferred_updates, "update $drlast $new_head $git_null_obj"; + update_head $old_head, $new_head, "stitch"; } sub cmd_convert_from_gbp () { @@ -1274,12 +1286,12 @@ sub cmd_convert_from_gbp () { 'Delete debian/patches, as part of converting to git-debrebase format.', '[git-debrebase convert-from-gbp: drop patches from tree]' ]; - # make the breakwater pseudomerge + # make the anchor merge # the tree is already exactly right $work = make_commit [$work, $upstream], [ 'git-debrebase import: declare upstream', 'First breakwater merge.', - '[git-debrebase breakwater: declare upstream]' + '[git-debrebase anchor: declare upstream]' ]; # rebase the patch queue onto the new breakwater @@ -1294,7 +1306,7 @@ sub cmd_convert_from_gbp () { sub cmd_convert_to_gbp () { badusage "no arguments allowed" if @ARGV; my $head = get_head(); - my $ffq = (ffq_prev_branchinfo())[3]; + my (undef, undef, undef, $ffq, $drlast) = ffq_prev_branchinfo(); my $bw = breakwater_of $head; fresh_workarea(); my $out; @@ -1309,9 +1321,8 @@ sub cmd_convert_to_gbp () { ]; }; if (defined $ffq) { - runcmd @git, qw(update-ref -m), - "debrebase: converting corresponding main branch to gbp format", - $ffq, $git_null_obj; + push @deferred_updates, "delete $ffq"; + push @deferred_updates, "delete $drlast"; } update_head_checkout $head, $out, "convert to gbp (v0)"; print < \$debuglevel, 'noop-ok', => \$opt_noop_ok, 'f=s' => \@fproblem_force_opts, + 'anchor=s' => \@opt_anchors, 'force!') or die badusage "bad options\n"; initdebug('git-debrebase '); enabledebug if $debuglevel; @@ -1382,6 +1394,8 @@ chdir $toplevel or die "chdir $toplevel: $!"; $rd = fresh_playground "$playprefix/misc"; +@opt_anchors = map { git_rev_parse $_ } @opt_anchors; + if (!@ARGV || $ARGV[0] =~ m{^-}) { defaultcmd_rebase(); } else {