# 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
#
# git-debrebase [<options>] gbp2debrebase-v0 \
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;
}
return cmdoutput @cmd;
}
-our $fproblems;
-sub fproblem ($) {
- my ($msg) = @_;
- $fproblems++;
- print STDERR "git-debrebase: safety catch tripped: $msg\n";
+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) {
+ 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
- "safety catch trips (%d) overriden by --force\n",
- $fproblems;
+ "%s: safety catch trips: %d overriden by global --force\n",
+ $us, $fproblems_tripped;
} else {
fail sprintf
- "safety catch trips (%d) (you could --force)",
- $fproblems;
+ "%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
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 &&
- $r->{Msg} !~ m{^\[git-debrebase breakwater.*\]$}m
+ if (@p == 2 && @identical == 1 && !$claims_to_be_breakwater
# breakwater merges can look like pseudomerges, if they are
# "declare" commits (ie, there are no upstream changes)
) {
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 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';
- @ARGV = qw(-i) unless @ARGV; # make configurable
runcmd @git, qw(rebase), @ARGV, $breakwater;
}
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 () {
- # 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
$piece->($n, Old => $old_upstream->{CommitId}.'^'.$parentix);
}
} else {
- fproblem "previous upstream $old_upstream->{CommitId} is from".
- " git-debrebase but not an \`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}) {
- fproblem "introducing upstream piece \`$pc->{Name}'";
+ fproblem 'upstream-new-piece',
+ "introducing upstream piece \`$pc->{Name}'";
} elsif (!$pc->{New}) {
- fproblem "dropping upstream piece \`$pc->{Name}'";
+ fproblem 'upstream-rm-piece',
+ "dropping upstream piece \`$pc->{Name}'";
} elsif (!is_fast_fwd $pc->{Old}, $pc->{New}) {
- fproblem "not fast forward: $pc->{Name} $pc->{Old}..$pc->{New}";
+ fproblem 'upstream-not-ff',
+ "not fast forward: $pc->{Name} $pc->{Old}..$pc->{New}";
}
}
in_workarea sub {
my @upstream_merge_parents;
- if (!$fproblems) {
+ if (!any_fproblems()) {
push @upstream_merge_parents, $old_upstream->{CommitId};
}
# now it's for the user to sort out
}
+sub cmd_record_ffq_prev () {
+ badusage "no arguments allowed" if @ARGV;
+ my ($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;
}
if (!is_fast_fwd $upstream, $old_head) {
- fproblem "upstream ($upstream) is not an ancestor of 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 $wrong) {
- fproblem "history between upstream ($upstream) and HEAD contains direct changes to upstream files - are you sure this is a gbp (patches-unapplied) branch?";
+ 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 ($upstream) contains debian/ directory";
+ fproblem 'upstream-has-debian',
+ "upstream ($upstream) contains debian/ directory";
}
fproblems_maybe_bail();
# 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 = get_head();
+ $work = git_rev_parse 'HEAD';
};
update_head_checkout $old_head, $work, 'gbp2debrebase';
}
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;
~ianmdlvl / dgit.git / blobdiff