} elsif ($vcmp > 0) {
print STDERR <<END or die $!;
-Version actually in archive: $cversion (older)
-Last allegedly pushed/uploaded: $oversion (newer or same)
+Version actually in archive: $cversion (older)
+Last version pushed with dgit: $oversion (newer or same)
$later_warning_msg
END
@output = $lastpush_mergeinput;
} else {
+ # Same version. Use what's in the server git branch,
+ # discarding our own import. (This could happen if the
+ # server automatically imports all packages into git.)
@output = $lastpush_mergeinput;
}
}
sub git_fetch_us () {
my @specs =
- map { "+refs/$_/*:".lrfetchrefs."/$_/*" }
+ map { "$_/*" }
qw(tags heads), $branchprefix;
- runcmd_ordryrun_local @git, qw(fetch -p -n -q), access_giturl(), @specs;
+
+ # This is rather miserable:
+ # When git-fetch --prune is passed a fetchspec ending with a *,
+ # it does a plausible thing. If there is no * then:
+ # - it matches subpaths too, even if the supplied refspec
+ # starts refs, and behaves completely madly if the source
+ # has refs/refs/something. (See, for example, Debian #NNNN.)
+ # - if there is no matching remote ref, it bombs out the whole
+ # fetch.
+ # We want to fetch a fixed ref, and we don't know in advance
+ # if it exists, so this is not suitable.
+ #
+ # Our workaround is to use git-ls-remote. git-ls-remote has its
+ # own qairks. Notably, it has the absurd multi-tail-matching
+ # behaviour: git-ls-remote R refs/foo can report refs/foo AND
+ # refs/refs/foo etc.
+ #
+ # Also, we want an idempotent snapshot, but we have to make two
+ # calls to the remote: one to git-ls-remote and to git-fetch. The
+ # solution is use git-ls-remote to obtain a target state, and
+ # git-fetch to try to generate it. If we don't manage to generate
+ # the target state, we try again.
+
+ my $specre = join '|', map {
+ my $x = $_;
+ $x =~ s/\W/\\$&/g;
+ $x =~ s/\\\*$/.*/;
+ "(?:refs/$x)";
+ } @specs;
+ printdebug "git_fetch_us specre=$specre\n";
+ my $wanted_rref = sub {
+ local ($_) = @_;
+ return m/^(?:$specre)$/o;
+ };
+
+ my %lrfetchrefs_f;
+
+ my $fetch_iteration = 0;
+ FETCH_ITERATION:
+ for (;;) {
+ if (++$fetch_iteration > 10) {
+ fail "too many iterations trying to get sane fetch!";
+ }
+
+ my @look = map { "refs/$_" } @specs;
+ my @lcmd = (@git, qw(ls-remote -q --refs), access_giturl(), @look);
+ debugcmd "|",@lcmd;
+
+ my %wantr;
+ open GITLS, "-|", @lcmd or die $!;
+ while (<GITLS>) {
+ printdebug "=> ", $_;
+ m/^(\w+)\s+(\S+)\n/ or die "ls-remote $_ ?";
+ my ($objid,$rrefname) = ($1,$2);
+ if (!$wanted_rref->($rrefname)) {
+ print STDERR <<END;
+warning: git-ls-remote @look reported $rrefname; this is silly, ignoring it.
+END
+ next;
+ }
+ $wantr{$rrefname} = $objid;
+ }
+ $!=0; $?=0;
+ close GITLS or failedcmd @lcmd;
+
+ # OK, now %want is exactly what we want for refs in @specs
+ my @fspecs = map {
+ return () if !m/\*$/ && !exists $wantr{"refs/$_"};
+ "+refs/$_:".lrfetchrefs."/$_";
+ } @specs;
+
+ my @fcmd = (@git, qw(fetch -p -n -q), access_giturl(), @fspecs);
+ runcmd_ordryrun_local @git, qw(fetch -p -n -q), access_giturl(),
+ @fspecs;
+
+ %lrfetchrefs_f = ();
+ my %objgot;
+
+ git_for_each_ref(lrfetchrefs, sub {
+ my ($objid,$objtype,$lrefname,$reftail) = @_;
+ $lrfetchrefs_f{$lrefname} = $objid;
+ $objgot{$objid} = 1;
+ });
+
+ foreach my $lrefname (sort keys %lrfetchrefs_f) {
+ my $rrefname = 'refs'.substr($lrefname, length lrfetchrefs);
+ if (!exists $wantr{$rrefname}) {
+ if ($wanted_rref->($rrefname)) {
+ printdebug <<END;
+git-fetch @fspecs created $lrefname which git-ls-remote @look didn't list.
+END
+ } else {
+ print STDERR <<END
+warning: git-fetch @fspecs created $lrefname; this is silly, deleting it.
+END
+ }
+ runcmd_ordryrun_local @git, qw(update-ref -d), $lrefname;
+ delete $lrfetchrefs_f{$lrefname};
+ next;
+ }
+ }
+ foreach my $rrefname (sort keys %wantr) {
+ my $lrefname = lrfetchrefs.substr($rrefname, 4);
+ my $got = $lrfetchrefs_f{$lrefname} // '<none>';
+ my $want = $wantr{$rrefname};
+ next if $got eq $want;
+ if (!defined $objgot{$want}) {
+ print STDERR <<END;
+warning: git-ls-remote suggests we want $lrefname
+warning: and it should refer to $want
+warning: but git-fetch didn't fetch that object to any relevant ref.
+warning: This may be due to a race with someone updating the server.
+warning: Will try again...
+END
+ next FETCH_ITERATION;
+ }
+ printdebug <<END;
+git-fetch @fspecs made $lrefname=$got but want git-ls-remote @look says $want
+END
+ runcmd_ordryrun_local @git, qw(update-ref -m),
+ "dgit fetch git-fetch fixup", $lrefname, $want;
+ $lrfetchrefs_f{$lrefname} = $want;
+ }
+ last;
+ }
+ printdebug "git_fetch_us: git-fetch --no-insane emulation complete\n",
+ Dumper(\%lrfetchrefs_f);
my %here;
my @tagpats = debiantags('*',access_basedistro);
print STDERR <<END or die $!;
Git commit in archive is behind the last version allegedly pushed/uploaded.
-Commit referred to by archive: $dsc_hash
-Last allegedly pushed/uploaded: $lastpush_hash
+Commit referred to by archive: $dsc_hash
+Last version pushed with dgit: $lastpush_hash
$later_warning_msg
END
@mergeinputs = ($lastpush_mergeinput);
~ianmdlvl / dgit.git / blobdiff