Linux build: Use sysroot when calculating dependencies

third_party/dpkg-dev/scripts/Dpkg/Source/Quilt.pm

+# Copyright © 2008-2012 Raphaël Hertzog <hertzog@debian.org>
+#
+# 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
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package Dpkg::Source::Quilt;
+
+use strict;
+use warnings;
+
+our $VERSION = '0.01';
+
+use Dpkg::Gettext;
+use Dpkg::ErrorHandling;
+use Dpkg::Source::Patch;
+use Dpkg::Source::Functions qw(erasedir fs_time);
+use Dpkg::Vendor qw(get_current_vendor);
+
+use File::Spec;
+use File::Copy;
+use File::Find;
+use File::Path qw(make_path);
+use File::Basename;
+
+sub new {
+    my ($this, $dir, %opts) = @_;
+    my $class = ref($this) || $this;
+
+    my $self = {
+        dir => $dir,
+    };
+    bless $self, $class;
+
+    $self->load_series();
+    $self->load_db();
+
+    return $self;
+}
+
+sub setup_db {
+    my ($self) = @_;
+    my $db_dir = $self->get_db_file();
+    if (not -d $db_dir) {
+        mkdir $db_dir or syserr(_g('cannot mkdir %s'), $db_dir);
+    }
+    my $file = $self->get_db_file('.version');
+    if (not -e $file) {
+        open(my $version_fh, '>', $file) or syserr(_g('cannot write %s'), $file);
+        print { $version_fh } "2\n";
+        close($version_fh);
+    }
+    # The files below are used by quilt to know where patches are stored
+    # and what file contains the patch list (supported by quilt >= 0.48-5
+    # in Debian).
+    $file = $self->get_db_file('.quilt_patches');
+    if (not -e $file) {
+        open(my $qpatch_fh, '>', $file) or syserr(_g('cannot write %s'), $file);
+        print { $qpatch_fh } "debian/patches\n";
+        close($qpatch_fh);
+    }
+    $file = $self->get_db_file('.quilt_series');
+    if (not -e $file) {
+        open(my $qseries_fh, '>', $file) or syserr(_g('cannot write %s'), $file);
+        my $series = $self->get_series_file();
+        $series = (File::Spec->splitpath($series))[2];
+        print { $qseries_fh } "$series\n";
+        close($qseries_fh);
+    }
+}
+
+sub load_db {
+    my ($self) = @_;
+
+    my $pc_applied = $self->get_db_file('applied-patches');
+    $self->{applied_patches} = [ $self->read_patch_list($pc_applied) ];
+}
+
+sub write_db {
+    my ($self) = @_;
+
+    $self->setup_db();
+    my $pc_applied = $self->get_db_file('applied-patches');
+    open(my $applied_fh, '>', $pc_applied) or
+        syserr(_g('cannot write %s'), $pc_applied);
+    foreach my $patch (@{$self->{applied_patches}}) {
+        print { $applied_fh } "$patch\n";
+    }
+    close($applied_fh);
+}
+
+sub load_series {
+    my ($self, %opts) = @_;
+
+    my $series = $self->get_series_file();
+    $self->{series} = [ $self->read_patch_list($series, %opts) ];
+}
+
+sub series {
+    my ($self) = @_;
+    return @{$self->{series}};
+}
+
+sub applied {
+    my ($self) = @_;
+    return @{$self->{applied_patches}};
+}
+
+sub top {
+    my ($self) = @_;
+    my $count = scalar @{$self->{applied_patches}};
+    return $self->{applied_patches}[$count - 1] if $count;
+    return;
+}
+
+sub next {
+    my ($self) = @_;
+    my $count_applied = scalar @{$self->{applied_patches}};
+    my $count_series = scalar @{$self->{series}};
+    return $self->{series}[$count_applied] if ($count_series > $count_applied);
+    return;
+}
+
+sub push {
+    my ($self, %opts) = @_;
+    $opts{verbose} //= 0;
+    $opts{timestamp} //= fs_time($self->{dir});
+
+    my $patch = $self->next();
+    return unless defined $patch;
+
+    my $path = $self->get_patch_file($patch);
+    my $obj = Dpkg::Source::Patch->new(filename => $path);
+
+    info(_g('applying %s'), $patch) if $opts{verbose};
+    eval {
+        $obj->apply($self->{dir}, timestamp => $opts{timestamp},
+                    verbose => $opts{verbose},
+                    force_timestamp => 1, create_dirs => 1, remove_backup => 0,
+                    options => [ '-t', '-F', '0', '-N', '-p1', '-u',
+                                 '-V', 'never', '-g0', '-E', '-b',
+                                 '-B', ".pc/$patch/", '--reject-file=-' ]);
+    };
+    if ($@) {
+        info(_g('fuzz is not allowed when applying patches'));
+        info(_g("if patch '%s' is correctly applied by quilt, use '%s' to update it"),
+             $patch, 'quilt refresh');
+        $self->restore_quilt_backup_files($patch, %opts);
+        erasedir($self->get_db_file($patch));
+        die $@;
+    }
+    CORE::push @{$self->{applied_patches}}, $patch;
+    $self->write_db();
+}
+
+sub pop {
+    my ($self, %opts) = @_;
+    $opts{verbose} //= 0;
+    $opts{timestamp} //= fs_time($self->{dir});
+    $opts{reverse_apply} //= 0;
+
+    my $patch = $self->top();
+    return unless defined $patch;
+
+    info(_g('unapplying %s'), $patch) if $opts{verbose};
+    my $backup_dir = $self->get_db_file($patch);
+    if (-d $backup_dir and not $opts{reverse_apply}) {
+        # Use the backup copies to restore
+        $self->restore_quilt_backup_files($patch);
+    } else {
+        # Otherwise reverse-apply the patch
+        my $path = $self->get_patch_file($patch);
+        my $obj = Dpkg::Source::Patch->new(filename => $path);
+
+        $obj->apply($self->{dir}, timestamp => $opts{timestamp},
+                    verbose => 0, force_timestamp => 1, remove_backup => 0,
+                    options => [ '-R', '-t', '-N', '-p1',
+                                 '-u', '-V', 'never', '-g0', '-E',
+                                 '--no-backup-if-mismatch' ]);
+    }
+
+    erasedir($backup_dir);
+    pop @{$self->{applied_patches}};
+    $self->write_db();
+}
+
+sub get_db_version {
+    my ($self) = @_;
+    my $pc_ver = $self->get_db_file('.version');
+    if (-f $pc_ver) {
+        open(my $ver_fh, '<', $pc_ver) or syserr(_g('cannot read %s'), $pc_ver);
+        my $version = <$ver_fh>;
+        chomp $version;
+        close($ver_fh);
+        return $version;
+    }
+    return;
+}
+
+sub find_problems {
+    my ($self) = @_;
+    my $patch_dir = $self->get_patch_file();
+    if (-e $patch_dir and not -d _) {
+        return sprintf(_g('%s should be a directory or non-existing'), $patch_dir);
+    }
+    my $series = $self->get_series_file();
+    if (-e $series and not -f _) {
+        return sprintf(_g('%s should be a file or non-existing'), $series);
+    }
+    return;
+}
+
+sub get_series_file {
+    my ($self) = @_;
+    my $vendor = lc(get_current_vendor() || 'debian');
+    # Series files are stored alongside patches
+    my $default_series = $self->get_patch_file('series');
+    my $vendor_series = $self->get_patch_file("$vendor.series");
+    return $vendor_series if -e $vendor_series;
+    return $default_series;
+}
+
+sub get_db_file {
+    my $self = shift;
+    return File::Spec->catfile($self->{dir}, '.pc', @_);
+}
+
+sub get_db_dir {
+    my ($self) = @_;
+    return $self->get_db_file();
+}
+
+sub get_patch_file {
+    my $self = shift;
+    return File::Spec->catfile($self->{dir}, 'debian', 'patches', @_);
+}
+
+sub get_patch_dir {
+    my ($self) = @_;
+    return $self->get_patch_file();
+}
+
+## METHODS BELOW ARE INTERNAL ##
+
+sub read_patch_list {
+    my ($self, $file, %opts) = @_;
+    return () if not defined $file or not -f $file;
+    $opts{warn_options} //= 0;
+    my @patches;
+    open(my $series_fh, '<' , $file) or syserr(_g('cannot read %s'), $file);
+    while (defined($_ = <$series_fh>)) {
+        chomp; s/^\s+//; s/\s+$//; # Strip leading/trailing spaces
+        s/(^|\s+)#.*$//; # Strip comment
+        next unless $_;
+        if (/^(\S+)\s+(.*)$/) {
+            $_ = $1;
+            if ($2 ne '-p1') {
+                warning(_g('the series file (%s) contains unsupported ' .
+                           "options ('%s', line %s); dpkg-source might " .
+                           'fail when applying patches'),
+                        $file, $2, $.) if $opts{warn_options};
+            }
+        }
+        error(_g('%s contains an insecure path: %s'), $file, $_) if m{(^|/)\.\./};
+        CORE::push @patches, $_;
+    }
+    close($series_fh);
+    return @patches;
+}
+
+sub restore_quilt_backup_files {
+    my ($self, $patch, %opts) = @_;
+    my $patch_dir = $self->get_db_file($patch);
+    return unless -d $patch_dir;
+    info(_g('restoring quilt backup files for %s'), $patch) if $opts{verbose};
+    find({
+        no_chdir => 1,
+        wanted => sub {
+            return if -d $_;
+            my $relpath_in_srcpkg = File::Spec->abs2rel($_, $patch_dir);
+            my $target = File::Spec->catfile($self->{dir}, $relpath_in_srcpkg);
+            if (-s $_) {
+                unlink($target);
+                make_path(dirname($target));
+                unless (link($_, $target)) {
+                    copy($_, $target)
+                        or syserr(_g('failed to copy %s to %s'), $_, $target);
+                    chmod((stat(_))[2], $target)
+                        or syserr(_g("unable to change permission of `%s'"), $target);
+                }
+            } else {
+                # empty files are "backups" for new files that patch created
+                unlink($target);
+            }
+        }
+    }, $patch_dir);
+}
+
+1;