package PublicInbox::SolverGit;
use strict;
use warnings;
+use 5.010_001;
use File::Temp 0.19 ();
use Fcntl qw(SEEK_SET);
use PublicInbox::Git qw(git_unquote git_quote);
# oid_a => abbreviated pre-image oid,
# oid_b => abbreviated post-image oid,
# tmp => anonymous file handle with the diff,
-# hdr_lines => arrayref of various header lines for mode information
+# hdr_lines => string of various header lines for mode information
# mode_a => original mode of oid_a (string, not integer),
# ibx => PublicInbox::Inbox object containing the diff
# smsg => PublicInbox::SearchMsg object containing diff
# n => numeric path of the patch (relative to worktree)
# }
-# don't bother if somebody sends us a patch with these path components,
-# it's junk at best, an attack attempt at worse:
-my %bad_component = map { $_ => 1 } ('', '.', '..');
-
sub dbg ($$) {
print { $_[0]->{out} } $_[1], "\n" or ERR($_[0], "print(dbg): $!");
}
sub extract_diff ($$) {
my ($p, $arg) = @_;
- my ($self, $diffs, $re, $ibx, $smsg) = @$arg;
+ my ($self, $diffs, $pre, $post, $ibx, $smsg) = @$arg;
my ($part) = @$p; # ignore $depth and @idx;
- my $hdr_lines; # diff --git a/... b/...
- my $tmp;
my $ct = $part->content_type || 'text/plain';
my ($s, undef) = msg_part_text($part, $ct);
defined $s or return;
$s =~ s/\r\n/\n/sg;
}
- foreach my $l (split(/^/m, $s)) {
- if ($l =~ $re) {
- $di->{oid_a} = $1;
- $di->{oid_b} = $2;
- if (defined($3)) {
- my $mode_a = $3;
- if ($mode_a =~ /\A(?:100644|120000|100755)\z/) {
- $di->{mode_a} = $mode_a;
- }
- }
-
-
- # start writing the diff out to a tempfile
- my $path = ++$self->{tot};
- $di->{n} = $path;
- open($tmp, '>', $self->{tmp}->dirname . "/$path") or
- die "open(tmp): $!";
-
- push @$hdr_lines, $l;
- $di->{hdr_lines} = $hdr_lines;
- utf8::encode($_) for @$hdr_lines;
- print $tmp @$hdr_lines or die "print(tmp): $!";
-
- # for debugging/diagnostics:
- $di->{ibx} = $ibx;
- $di->{smsg} = $smsg;
- } elsif ($l =~ m!\Adiff --git ("?[^/]+/.+) ("?[^/]+/.+)$!) {
- last if $tmp; # got our blob, done!
-
- my ($path_a, $path_b) = ($1, $2);
-
- # diff header lines won't have \r because git
- # will quote them, but Email::MIME gives CRLF
- # for quoted-printable:
- $path_b =~ tr/\r//d;
-
- # don't care for leading 'a/' and 'b/'
- my (undef, @a) = split(m{/}, git_unquote($path_a));
- my (undef, @b) = split(m{/}, git_unquote($path_b));
-
- # get rid of path-traversal attempts and junk patches:
- foreach (@a, @b) {
- return if $bad_component{$_};
- }
-
- $di->{path_a} = join('/', @a);
- $di->{path_b} = join('/', @b);
- $hdr_lines = [ $l ];
- } elsif ($tmp) {
- utf8::encode($l);
- print $tmp $l or die "print(tmp): $!";
- } elsif ($hdr_lines) {
- push @$hdr_lines, $l;
- if ($l =~ /\Anew file mode (100644|120000|100755)$/) {
- $di->{mode_a} = $1;
- }
- }
- }
- return undef unless $tmp;
+ state $LF = qr!\r?\n!;
+ state $FN = qr!(?:("?[^/\n]+/[^\r\n]+)|/dev/null)!;
+
+ $s =~ m!( # $1 start header lines we save for debugging:
+
+ # everything before ^index is optional, but we don't
+ # want to match ^(old|copy|rename|deleted|...) unless
+ # we match /^diff --git/ first:
+ (?: # begin optional stuff:
+
+ # try to get the pre-and-post filenames as $2 and $3
+ (?:^diff\x20--git\x20$FN\x20$FN$LF)
+
+ # old mode $4
+ (?:^old mode\x20(100644|120000|100755)$LF)?
+
+ # ignore other info
+ (?:^(?:copy|rename|deleted|dissimilarity|similarity).*$LF)?
+
+ # new mode (possibly new file) ($5)
+ (?:^new\x20(?:file\x20)?mode\x20(100644|120000|100755)$LF)?
+
+ # ignore other info
+ (?:^(?:copy|rename|deleted|dissimilarity|similarity).*$LF)?
+
+ )? # end of optional stuff, everything below is required
+
+ # match the pre and post-image OIDs as $6 $7
+ ^index\x20(${pre}[a-f0-9]*)\.\.(${post}[a-f0-9]*)
+ # mode if unchanged $8
+ (?:\x20(100644|120000|100755))?$LF
+ ) # end of header lines ($1)
+ ( # $9 is the patch body
+ # "--- a/foo.c" sets pre-filename ($10) in case
+ # $2 is missing
+ (?:^---\x20$FN$LF)
+
+ # "+++ b/foo.c" sets post-filename ($11) in case
+ # $3 is missing
+ (?:^\+{3}\x20$FN$LF)
+
+ # the meat of the diff, including "^\\No newline ..."
+ # We also allow for totally blank lines w/o leading spaces,
+ # because git-apply(1) handles that case, too
+ (?:^(?:[\@\+\x20\-\\][^\r\n]*|)$LF)+
+ )!smx or return;
+
+ my $hdr_lines = $1;
+ my $path_a = $2 // $10;
+ my $path_b = $3 // $11;
+ $di->{oid_a} = $6;
+ $di->{oid_b} = $7;
+ $di->{mode_a} = $5 // $8 // $4; # new (file) // unchanged // old
+ my $patch = $9;
+
+ # don't care for leading 'a/' and 'b/'
+ my (undef, @a) = split(m{/}, git_unquote($path_a));
+ my (undef, @b) = split(m{/}, git_unquote($path_b));
+
+ # get rid of path-traversal attempts and junk patches:
+ # it's junk at best, an attack attempt at worse:
+ state $bad_component = { map { $_ => 1 } ('', '.', '..') };
+ foreach (@a, @b) { return if $bad_component->{$_} }
+
+ $di->{path_a} = join('/', @a);
+ $di->{path_b} = join('/', @b);
+
+ utf8::encode($hdr_lines);
+ utf8::encode($patch);
+ my $path = ++$self->{tot};
+ $di->{n} = $path;
+ open(my $tmp, '>', $self->{tmp}->dirname . "/$path") or
+ die "open(tmp): $!";
+ print $tmp $hdr_lines, $patch or die "print(tmp): $!";
close $tmp or die "close(tmp): $!";
+
+ # for debugging/diagnostics:
+ $di->{ibx} = $ibx;
+ $di->{smsg} = $smsg;
+ $di->{hdr_lines} = $hdr_lines;
+
push @$diffs, $di;
}
}
my $msgs = $srch->query($q, { relevance => 1 });
- my $re = qr/\Aindex ($pre[a-f0-9]*)\.\.($post[a-f0-9]*)(?: ([0-9]+))?/;
+
my $diffs = [];
foreach my $smsg (@$msgs) {
$ibx->smsg_mime($smsg) or next;
my $mime = delete $smsg->{mime};
msg_iter($mime, \&extract_diff,
- [$self, $diffs, $re, $ibx, $smsg]);
+ [$self, $diffs, $pre, $post, $ibx, $smsg]);
}
@$diffs ? $diffs : undef;
}
my $oid_full = $existing->[1];
my $path_a = $di->{path_a} or die "BUG: path_a missing for $oid_full";
- my $mode_a = $di->{mode_a} || extract_old_mode($di);
+ my $mode_a = $di->{mode_a} // '100644';
my $in = tmpfile("update-index.$oid_full") or die "tmpfile: $!";
print $in "$mode_a $oid_full\t$path_a\0" or die "print: $!";
prepare_index($self);
}
-sub extract_old_mode ($) {
- my ($di) = @_;
- if (join('', @{$di->{hdr_lines}}) =~
- /^old mode (100644|100755|120000)\b/) {
- return $1;
- }
- '100644';
-}
-
sub do_finish ($) {
my ($self) = @_;
my ($found, $oid_want) = @$self{qw(found oid_want)};
my $i = ++$self->{nr};
$di = shift @$patches;
dbg($self, "\napplying [$i/$total] " . di_url($self, $di) .
- "\n" . join('', @{$di->{hdr_lines}}));
+ "\n" . $di->{hdr_lines});
my $path = $di->{n};
$len += length($path) + 1;
push @cmd, $path;