# Script helping make fast-forwarding histories while still rebasing
# upstream deltas when working on Debian packaging
#
-# Copyright (C)2017 Ian Jackson
+# Copyright (C)2017,2018 Ian Jackson
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
-# git-debrebase new-upstreams-v0 \
-# NEW-VERSION ORIG-COMMITISH
-# [EXTRA-ORIG-NAME EXTRA-ORIG-COMMITISH ...]
# usages:
-# git-debrebase status
-# git-debrebase start # like ffqrebase start + debrebase launder
-# git-debrebase new-upstream [stuff] # see below
-# git-debrebase <git-rebase options> # does debrebase start if necessary
#
-# git-debrebase analyse
-# git-debrebase launder # prints breakwater tip
-# git-debrebase create-new-upstream-breakwater [-f] <upstreaminfo>...
+# git-debrebase [<options>] new-upstream-v0 \
+# <new-version> <orig-commitish> \
+# [<extra-orig-name> <extra-orig-commitish> ...] \
+# [<git-rebase options>...]
#
-# <upstreaminfo> is
-# [,][<subdir>:][+]<commitid>[,...]
+# git-debrebase [<options> --] [<git-rebase options...>]
+# git-debrebase [<options>] analyse
+# git-debrebase [<options>] launder # prints breakwater tip etc.
+# git-debrebase [<options>] stitch [--prose=<for commit message>]
+# git-debrebase [<options>] downstream-rebase-launder-v0 # experimental
#
-# if initial comma is supplied, entries are not positional. Unspecified
-# <subdir> means root (and there may be only one).
-# xxx want auto branch names
-# xxx too complicated
-# how about for now
-# [+]<commit> [<subdir/> [+]<commit>...]
-# ? plus options
-# --new-upstream-different-subtrees
+# git-debrebase [<options>] gbp2debrebase-v0 \
+# <upstream>
+
+# 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.
#
-# automatic case
-# git-debrebase new-upstream
-# - previous breakwater merge must be gdr-generated
-# - orig set is the same as before
-# - implicitly uses upstream branches according to orig set
-# - not all upstream branches need be updated
-# - insists on fast-forward of each branch, unless
-# --force (or --force=<subdir>[/])
-# branch set adjustments
-# git-debrebase new-upstream --add <subdir>/
-# git-debrebase new-upstream --rm <subdir>/
-# git-debrebase new-upstream / [<subdir>/ ...]
-# - orig set is adjusted
-# - otherwise like auto (--add is not checked for ffness, obv)
-# - multiple --add and --rm may be specified
-# - --add makes new upstream the last contributor
-# explicit
-# git-debrebase / [<rootcommitid>] [<subdir>/ [<commitid>] ...]
-# - orig set is precisely as specified now
-# - previous breakwater merge is irrelevant
-# - no fast forward checks
-# for now only explicit with commitids
-
-# implicitly uses `upstream'
-# # (or multiple other branches)
-# git-debrebase new-upstream \
-# [<subdir>/]=<commitid>
-
-# UPSTREAM[,[[SUBDIR:]SUBUPSTREAM]
-# default for SUBDIR: is from previous upstream merge[xxx terminology]
-#
+# 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.
#
-#xxx
-# when starting must record original start (for ff)
-# and new rebase basis
+# * There should be a standard convention for the version number,
+# and unfinalised or not changelog, after new-upstream.
#
-# git-ffqrebase start [BASE]
-# # records previous HEAD so it can be overwritten
-# # records base for future git-ffqrebase
-# git-ffqrebase set-base BASE
-# git-ffqrebase <git-rebase options>
-# git-ffqrebase finish
-# git-ffqrebase status [BRANCH]
+# * 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.
#
-# refs/ffqrebase-prev/BRANCH BRANCH may be refs/...; if not it means
-# refs/ffqrebase-base/BRANCH refs/heads/BRANCH
-# zero, one, or both of these may exist
+# * Docs need writing and updating. Even README.git-debrebase
+# describes a design but may not reflect the implementation.
#
-# git-debrebase without start, if already started, is willing
-# to strip pseudomerges provided that they overwrite exactly
-# the previous HEAD
-# xxxx is this right ? what matters is have we pushed
-# I think in fact the right answer is:
-# git-debrebase always strips out pseudomerges from its branch
-# a pseudomerge is put in at the time we want to push
-# at that time, we make a pseudomerge of the remote tracking
-# branch (if raw git) or the dgit view (if dgit)
-# for raw git git-ffqrebase, do want preciseley to record
-# value of remote tracking branch or our branch, on start, so we
-# overwrite only things we intend to
-# the previous pseudomerge check for tags and remote branches ?
+# * 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 Data::Dumper;
use Getopt::Long qw(:config posix_default gnu_compat bundling);
use Dpkg::Version;
+use File::FnMatch qw(:fnmatch);
-our ($opt_force);
+our ($opt_force, $opt_noop_ok);
+
+our $us = qw(git-debrebase);
sub badusage ($) {
my ($m) = @_;
die "bad usage: $m\n";
}
-sub cfg ($) {
- my ($k) = @_;
- $/ = "\0";
+sub cfg ($;$) {
+ my ($k, $optional) = @_;
+ local $/ = "\0";
my @cmd = qw(git config -z);
push @cmd, qw(--get-all) if wantarray;
push @cmd, $k;
- my $out = cmdoutput @cmd;
+ my $out = cmdoutput_errok @cmd;
+ if (!defined $out) {
+ fail "missing required git config $k" unless $optional;
+ return ();
+ }
return split /\0/, $out;
}
sub get_commit ($) {
my ($objid) = @_;
- my $data = git_cat_file $objid, 'commit';
+ my $data = (git_cat_file $objid, 'commit');
$data =~ m/(?<=\n)\n/ or die "$objid ($data) ?";
return ($`,$');
}
my @cmd = (@git, qw(diff-tree -z --no-renames));
push @cmd, @$opts;
push @cmd, "$_:" foreach $x, $y;
- push @cmd, @$limits;
+ push @cmd, '--', @$limits;
my $diffs = cmdoutput @cmd;
foreach (split /\0/, $diffs) { $fn->(); }
};
if ($mode eq 'A' && !m/\.series$/s) {
$ok = 1;
} elsif ($mode eq 'M' && $_ eq 'series') {
- my $x_s = git_cat_file "$x:debian/patches/series", 'blob';
- my $y_s = git_cat_file "$y:debian/patches/series", 'blob';
+ my $x_s = (git_cat_file "$x:debian/patches/series", 'blob');
+ my $y_s = (git_cat_file "$y:debian/patches/series", 'blob');
chomp $x_s; $x_s .= "\n";
$ok = $x_s eq substr($y_s, 0, length $x_s);
} else {
runcmd @git, qw(read-tree), "--prefix=$subdir/", $new_tree_object;
}
+sub make_commit ($$) {
+ my ($parents, $message_paras) = @_;
+ my $tree = cmdoutput @git, qw(write-tree);
+ my @cmd = (@git, qw(commit-tree), $tree);
+ push @cmd, qw(-p), $_ foreach @$parents;
+ push @cmd, qw(-m), $_ foreach @$message_paras;
+ return cmdoutput @cmd;
+}
+
+our @fproblem_force_opts;
+our $fproblems_forced;
+our $fproblems_tripped;
+sub fproblem ($$) {
+ my ($tag,$msg) = @_;
+ if (grep { $_ eq $tag } @fproblem_force_opts) {
+ $fproblems_forced++;
+ print STDERR "git-debrebase: safety catch overridden (-f$tag): $msg\n";
+ } else {
+ $fproblems_tripped++;
+ print STDERR "git-debrebase: safety catch tripped (-f$tag): $msg\n";
+ }
+}
+
+sub fproblems_maybe_bail () {
+ if ($fproblems_forced) {
+ printf STDERR
+ "%s: safety catch trips: %d overriden by individual -f options\n",
+ $us, $fproblems_forced;
+ }
+ if ($fproblems_tripped) {
+ if ($opt_force) {
+ printf STDERR
+ "%s: safety catch trips: %d overriden by global --force\n",
+ $us, $fproblems_tripped;
+ } else {
+ fail sprintf
+ "%s: safety catch trips: %d blockers (you could -f<tag>, or --force)",
+ $us, $fproblems_tripped;
+ }
+ }
+}
+sub any_fproblems () {
+ return $fproblems_forced || $fproblems_tripped;
+}
+
# classify returns an info hash like this
# CommitId => $objid
# Hdr => # commit headers, including 1 final newline
return $r;
};
+ my $claims_to_be_breakwater =
+ $r->{Msg} =~ m{^\[git-debrebase breakwater.*\]$}m;
+
if (@p == 1) {
+ if ($claims_to_be_breakwater) {
+ return $unknown->("single-parent git-debrebase breakwater \`merge'");
+ }
my $d = $r->{Parents}[0]{Differs};
if ($d == D_PAT_ADD) {
return $classify->(qw(AddPatches));
}
my @identical = grep { !$_->{Differs} } @p;
- if (@p == 2 && @identical == 1) {
+ 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)
+ ) {
my @overwritten = grep { $_->{Differs} } @p;
confess "internal error $objid ?" unless @overwritten==1;
return $classify->(qw(Pseudomerge),
my $cl;
my $xmsg = sub {
- my ($appendinfo) = @_;
+ my ($prose, $info) = @_;
my $ms = $cl->{Msg};
chomp $ms;
- $ms .= "\n\n[git-debrebase $appendinfo]\n";
+ $info //= '';
+ $ms .= "\n\n[git-debrebase$info: $prose]\n";
return (Msg => $ms);
};
my $rewrite_from_here = sub {
push @brw_cl, {
%$cl,
SpecialMethod => 'DgitImportUpstreamUpdate',
- $xmsg->("convert dgit import: upstream changes")
+ $xmsg->("convert dgit import: upstream changes",
+ " breakwater")
};
}
$prline->(" Import");
return @r
}
-sub get_head () { return git_rev_parse qw(HEAD); }
+sub get_head () {
+ git_check_unmodified();
+ return git_rev_parse qw(HEAD);
+}
sub update_head ($$$) {
my ($old, $new, $mrest) = @_;
sub update_head_checkout ($$$) {
my ($old, $new, $mrest) = @_;
- my $symref = git_get_symref();
- runcmd @git, qw(checkout), $new, qw(.);
update_head $old, $new, $mrest;
+ runcmd @git, qw(reset --hard);
+}
+
+sub update_head_postlaunder ($$$) {
+ my ($old, $tip, $reflogmsg) = @_;
+ return if $tip eq $old;
+ print "git-debrebase: laundered (head was $old)\n";
+ update_head $old, $tip, $reflogmsg;
+ # no tree changes except debian/patches
+ runcmd @git, qw(rm --quiet --ignore-unmatch -rf debian/patches);
}
sub cmd_launder () {
badusage "no arguments to launder allowed" if @ARGV;
my $old = get_head();
my ($tip,$breakwater,$last_upstream_merge) = walk $old;
- update_head $old, $tip, 'launder';
- # no tree changes except debian/patches
- runcmd @git, qw(rm --quiet --ignore-unmatch -rf debian/patches);
+ 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;
}
+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: $message";
+ fproblems_maybe_bail();
+ }
+ my ($tip,$breakwater) = walk $old;
+ update_head_postlaunder $old, $tip, 'launder for rebase';
+ runcmd @git, qw(rebase), @ARGV, $breakwater;
+}
+
sub cmd_analyse () {
die if ($ARGV[0]//'') =~ m/^-/;
badusage "too many arguments to analyse" if @ARGV>1;
if (defined $old) {
$old = git_rev_parse $old;
} else {
- $old = get_head();
+ $old = git_rev_parse 'HEAD';
}
my ($dummy,$breakwater) = walk $old, 1,*STDOUT;
STDOUT->error and die $!;
}
+sub ffq_prev_branchinfo () {
+ # => ('status', "message", [$current, $ffq_prev])
+ # 'status' may be
+ # branch message is undef
+ # weird-symref } no $current,
+ # notbranch } no $ffq_prev
+ my $current = git_get_symref();
+ return ('detached', 'detached HEAD') unless defined $current;
+ return ('weird-symref', 'HEAD symref is not to refs/')
+ unless $current =~ m{^refs/};
+ my $ffq_prev = "refs/$ffq_refprefix/$'";
+ return ('branch', undef, $current, $ffq_prev);
+}
+
+sub record_ffq_prev () {
+ # => ('status', "message")
+ # 'status' may be
+ # written message is undef
+ # exists
+ # detached
+ # weird-symref
+ # notbranch
+ # if not ff from some branch we should be ff from, is an fproblem
+ # if "written", will have printed something about that to stdout,
+ # and also some messages about ff checks
+ my ($status, $message, $current, $ffq_prev) = ffq_prev_branchinfo();
+ return ($status, $message) unless $status eq 'branch';
+
+ my $currentval = get_head();
+
+ my $exists = git_get_ref $ffq_prev;
+ return ('exists',"$ffq_prev already exists") if $exists;
+
+ return ('not-branch', 'HEAD symref is not to refs/heads/')
+ unless $current =~ m{^refs/heads/};
+ my $branch = $';
+
+ my @check_specs = split /\;/, (cfg "branch.$branch.ffq-ffrefs",1) // '*';
+ my %checked;
+
+ my $check = sub {
+ my ($lrref, $desc) = @_;
+ my $invert;
+ for my $chk (@check_specs) {
+ my $glob = $chk;
+ $invert = $glob =~ s{^[^!]}{};
+ last if fnmatch $glob, $lrref;
+ }
+ return if $invert;
+ my $lrval = git_get_ref $lrref;
+ return unless defined $lrval;
+
+ 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) {
+ $checked{$lrref} = -1;
+ fproblem 'behind', "you are behind $lrref, divergence risk";
+ } else {
+ $checked{$lrref} = -1;
+ fproblem 'diverged', "you have diverged from $lrref";
+ }
+ };
+
+ my $merge = cfg "branch.$branch.merge",1;
+ if (defined $merge && $merge =~ m{^refs/heads/}) {
+ my $rhs = $';
+ my $check_remote = sub {
+ my ($remote, $desc) = (@_);
+ return unless defined $remote;
+ $check->("refs/remotes/$remote/$rhs", $desc);
+ };
+ $check_remote->((cfg "branch.$branch.remote",1),
+ 'remote fetch/merge branch');
+ $check_remote->((cfg "branch.$branch.pushRemote",1) //
+ (cfg "branch.$branch.pushDefault",1),
+ 'remote push branch');
+ }
+ if ($branch =~ m{^dgit/}) {
+ $check->("remotes/dgit/$branch", 'remote dgit branch');
+ } elsif ($branch =~ m{^master$}) {
+ $check->("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);
+}
+
sub cmd_new_upstream_v0 () {
- # xxx would like to support more git-rebase options
- badusage
- "need NEW-VERSION UPS-COMMITISH [EXTRA-UPS-NAME EXTRA-UPS-COMMITISH...]"
- unless @ARGV % 2 == 0 and @ARGV >= 2;
- # tree should be clean and this is not checked
# automatically and unconditionally launders before rebasing
# if rebase --abort is used, laundering has still been done
my %pieces;
+ badusage "need NEW-VERSION UPS-COMMITTISH" unless @ARGV >= 2;
+
# parse args - low commitment
my $new_version = (new Dpkg::Version scalar(shift @ARGV), check => 1);
my $new_upstream_version = $new_version->version();
my ($n, @x) = @_; # may be ''
my $pc = $pieces{$n} //= {
Name => $n,
- Desc => ($n ? "upstream piece $n" : "upstream (main piece"),
+ Desc => ($n ? "upstream piece \`$n'" : "upstream (main piece"),
};
while (my $k = shift @x) { $pc->{$k} = shift @x; }
+ $pc;
};
my @newpieces;
OldIx => 0,
New => $new_upstream,
);
- while (@ARGV) {
+ while (@ARGV && $ARGV[0] !~ m{^-}) {
my $n = shift @ARGV;
+
+ badusage "for each EXTRA-UPS-NAME need EXTRA-UPS-COMMITISH"
+ unless @ARGV && $ARGV[0] !~ m{^-};
+
my $c = git_rev_parse shift @ARGV;
die unless $n =~ m/^$extra_orig_namepart_re$/;
$newpiece->($n, New => $c);
my $old_upstream = parsecommit
$old_upstream_update_cl->{OrigParents}[0]{CommitId};
- my $problems = 0;
- my $problem = sub {
- my ($msg) = @_;
- $problems++;
- print STDERR "preflight check failed: $msg\n";
- };
-
$piece->('', Old => $old_upstream->{CommitId});
if ($old_upstream->{Msg} =~ m{^\[git-debrebase }m) {
if ($old_upstream->{Msg} =~
- m{^\[git-debrebase new-upstream combine \.((?: $extra_orig_namepart_re)+)\]}
+ m{^\[git-debrebase upstream-combine \.((?: $extra_orig_namepart_re)+)\:.*\]$}m
) {
my @oldpieces = ('', split / /, $1);
my $parentix = -1 + scalar @{ $old_upstream->{Parents} };
$piece->($n, Old => $old_upstream->{CommitId}.'^'.$parentix);
}
} else {
- $problem->("previous upstream $old_upstream->{CommitId} is from".
- " git-debrebase but not a \`new-upstream combine' commit");
+ fproblem 'upstream-confusing',
+ "previous upstream $old_upstream->{CommitId} is from".
+ " git-debrebase but not an \`upstream-combine' commit";
}
}
foreach my $pc (values %pieces) {
if (!$pc->{Old}) {
- $problem->("introducing upstream piece $pc->{Name}");
+ fproblem 'upstream-new-piece',
+ "introducing upstream piece \`$pc->{Name}'";
} elsif (!$pc->{New}) {
- $problem->("dropping upstream piece $pc->{Name}");
+ fproblem 'upstream-rm-piece',
+ "dropping upstream piece \`$pc->{Name}'";
} elsif (!is_fast_fwd $pc->{Old}, $pc->{New}) {
- $problem->("not fast forward: $pc->{Name} $pc->{Old}..$pc->{New}");
+ fproblem 'upstream-not-ff',
+ "not fast forward: $pc->{Name} $pc->{Old}..$pc->{New}";
}
}
- if ($problems) {
- if ($opt_force) {
- printf STDERR
- "preflight check failures (%d) overriden by --force\n",
- $problems;
- } else {
- fail sprintf
- "preflight check failures (%d) (you could --force)",
- $problems;
- }
- }
+ printdebug "%pieces = ", (dd \%pieces), "\n";
+ printdebug "\@newpieces = ", (dd \@newpieces), "\n";
+
+ fproblems_maybe_bail();
my $new_bw;
in_workarea sub {
my @upstream_merge_parents;
- if (!$problems) {
+ if (!any_fproblems()) {
push @upstream_merge_parents, $old_upstream->{CommitId};
}
if (@newpieces > 1) {
# need to make the upstream subtree merge commit
- my $us_tree = cmdoutput @git, qw(write-tree);
- my @cmd = (@git, qw(commit-tree), $us_tree);
- push @cmd, qw(-p), $_ foreach @upstream_merge_parents;
- push @cmd, qw(-m), "Combine upstreams for $new_upstream_version";
- push @cmd, qw(-m),
- "[git-debrebase new-upstream combine . ".
- (join " ", map { $_->{Name} } @newpieces[1..$#newpieces]).
- "]";
- $new_upstream = cmdoutput @cmd;
+ $new_upstream = make_commit \@upstream_merge_parents,
+ [ "Combine upstreams for $new_upstream_version",
+ ("[git-debrebase upstream-combine . ".
+ (join " ", map { $_->{Name} } @newpieces[1..$#newpieces]).
+ ": new upstream]"),
+ ];
}
# $new_upstream is either the single upstream commit, or the
read_tree_subdir 'debian', "$old_bw:debian";
# index now contains the breakwater merge contents
-
- my $bw_tree = cmdoutput @git, qw(write_tree);
- my @cmd = (@git, qw(commit-tree), $bw_tree);
- push @cmd, qw(-p), $old_bw, qw(-p), $new_upstream;
- push @cmd, qw(-m), "Update to upstream $new_upstream_version";
- push @cmd, qw(-m),
- "[git-debrebase new-upstream breakwater $new_upstream_version]";
- $new_bw = cmdoutput @git;
+ $new_bw = make_commit [ $old_bw, $new_upstream ],
+ [ "Update to upstream $new_upstream_version",
+ "[git-debrebase breakwater: new upstream $new_upstream_version, merge]",
+ ];
# Now we have to add a changelog stanza so the Debian version
# is right.
-
die if unlink "debian";
- die unless $!==ENOTEMPTY;
- unlink "debian/changelog" or die $!;
+ die $! unless $!==ENOENT or $!==ENOTEMPTY;
+ unlink "debian/changelog" or $!==ENOENT or die $!;
+ mkdir "debian" or die $!;
open CN, ">", "debian/changelog" or die $!;
my $oldclog = git_cat_file ":debian/changelog";
$oldclog =~ m/^($package_re) \(\S+\) / or
runcmd @git, qw(update-index --add --replace), 'debian/changelog';
# Now we have the final new breakwater branch in the index
-
- $bw_tree = cmdoutput @git, qw(write_tree);
- @cmd = (@git, qw(commit-tree), $bw_tree);
- push @cmd, qw(-p), $new_bw;
- push @cmd, qw(-m),
- "Update changelog for new upstream $new_upstream_version";
- push @cmd, qw(-m),
- "[git-debrebase new-upstream changelog $new_upstream_version]";
- $new_bw = cmdoutput @git;
+ $new_bw = make_commit [ $new_bw ],
+ [ "Update changelog for new upstream $new_upstream_version",
+ "[git-debrebase: new upstream $new_upstream_version, changelog]",
+ ];
};
# we have constructed the new breakwater. we now need to commit to
# the laundering output, because git-rebase can't easily be made
# to make a replay list which is based on some other branch
- update_head $old_head, $old_laundered_tip, 'launder for new upstream';
+ update_head_postlaunder $old_head, $old_laundered_tip,
+ 'launder for new upstream';
- my @cmd = (@git, qw(rebase --onto), $new_bw, $old_bw);
+ my @cmd = (@git, qw(rebase --onto), $new_bw, $old_bw, @ARGV);
runcmd @cmd;
# now it's for the user to sort out
}
+sub cmd_record_ffq_prev () {
+ badusage "no arguments allowed" if @ARGV;
+ my ($status, $msg) = record_ffq_prev();
+ if ($status eq 'exists' && $opt_noop_ok) {
+ print "Previous head already recorded\n" or die $!;
+ } elsif ($status eq 'written') {
+ } else {
+ fail "Could not preserve: $msg";
+ }
+}
+
+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, $ffq_prev) = ffq_prev_branchinfo();
+ if ($status ne 'branch') {
+ fproblem $status, "could not check ffq-prev: $message";
+ fproblems_maybe_bail();
+ }
+ my $prev = $ffq_prev && git_get_ref $ffq_prev;
+ if (!$prev) {
+ fail "No ffq-prev to stitch." unless $opt_noop_ok;
+ }
+ fresh_workarea();
+ my $old_head = get_head();
+ 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 = <<END;
+update HEAD $new_head $old_head
+delete $ffq_prev $prev
+END
+ printdebug ">= ", $_, "\n" foreach split /\n/, $u;
+ print U $u;
+ printdebug ">\$\n";
+ close U or failedcmd @upd_cmd;
+}
+
+sub cmd_gbp2debrebase () {
+ badusage "needs 1 optional argument, the upstream" unless @ARGV<=1;
+ my ($upstream_spec) = @ARGV;
+ $upstream_spec //= 'refs/heads/upstream';
+ my $upstream = git_rev_parse $upstream_spec;
+ my $old_head = get_head();
+
+ my $upsdiff = get_differs $upstream, $old_head;
+ if ($upsdiff & D_UPS) {
+ runcmd @git, qw(--no-pager diff),
+ $upstream, $old_head,
+ qw( -- :!/debian :/);
+ fail "upstream ($upstream_spec) and HEAD are not identical in upstream files";
+ }
+
+ if (!is_fast_fwd $upstream, $old_head) {
+ fproblem 'upstream-not-ancestor',
+ "upstream ($upstream) is not an ancestor of HEAD";
+ } else {
+ my $wrong = cmdoutput
+ (@git, qw(rev-list --ancestry-path), "$upstream..HEAD",
+ qw(-- :/ :!/debian));
+ if (length $wrong) {
+ fproblem 'unexpected-upstream-changes',
+ "history between upstream ($upstream) and HEAD contains direct changes to upstream files - are you sure this is a gbp (patches-unapplied) branch?";
+ print STDERR "list expected changes with: git log --stat --ancestry-path $upstream_spec..HEAD -- :/ ':!/debian'\n";
+ }
+ }
+
+ if ((git_cat_file "$upstream:debian")[0] ne 'missing') {
+ fproblem 'upstream-has-debian',
+ "upstream ($upstream) contains debian/ directory";
+ }
+
+ fproblems_maybe_bail();
+
+ my $work;
+
+ fresh_workarea();
+ in_workarea sub {
+ runcmd @git, qw(checkout -q -b gdr-internal), $old_head;
+ # make a branch out of the patch queue - we'll want this in a mo
+ runcmd qw(gbp pq import);
+ # strip the patches out
+ runcmd @git, qw(checkout -q gdr-internal~0);
+ rm_subdir_cached 'debian/patches';
+ $work = make_commit ['HEAD'], [
+ 'git-debrebase import: drop patch queue',
+ 'Delete debian/patches, as part of converting to git-debrebase format.',
+ '[git-debrebase: gbp2debrebase, drop patches]'
+ ];
+ # make the breakwater pseudomerge
+ # the tree is already exactly right
+ $work = make_commit [$work, $upstream], [
+ 'git-debrebase import: declare upstream',
+ 'First breakwater merge.',
+ '[git-debrebase breakwater: declare upstream]'
+ ];
+
+ # rebase the patch queue onto the new breakwater
+ runcmd @git, qw(reset --quiet --hard patch-queue/gdr-internal);
+ runcmd @git, qw(rebase --quiet --onto), $work, qw(gdr-internal);
+ $work = git_rev_parse 'HEAD';
+ };
+
+ update_head_checkout $old_head, $work, 'gbp2debrebase';
+}
+
sub cmd_downstream_rebase_launder_v0 () {
badusage "needs 1 argument, the baseline" unless @ARGV==1;
my ($base) = @ARGV;
}
GetOptions("D+" => \$debuglevel,
+ 'noop-ok', => \$opt_noop_ok,
+ 'f=s' => \@fproblem_force_opts,
'force!') or die badusage "bad options\n";
initdebug('git-debrebase ');
enabledebug if $debuglevel;
$rd = fresh_playground "$playprefix/misc";
-my $cmd = shift @ARGV;
-my $cmdfn = $cmd;
-$cmdfn =~ y/-/_/;
-$cmdfn = ${*::}{"cmd_$cmdfn"};
+if (!@ARGV || $ARGV[0] =~ m{^-}) {
+ defaultcmd_rebase();
+} else {
+ my $cmd = shift @ARGV;
+ my $cmdfn = $cmd;
+ $cmdfn =~ y/-/_/;
+ $cmdfn = ${*::}{"cmd_$cmdfn"};
-$cmdfn or badusage "unknown git-debrebase sub-operation $cmd";
-$cmdfn->();
+ $cmdfn or badusage "unknown git-debrebase sub-operation $cmd";
+ $cmdfn->();
+}
~ianmdlvl / dgit.git / blobdiff