summaryrefslogtreecommitdiffstats
path: root/Bugzilla/Attachment/PatchReader.pm
blob: 44193ed860d84f444ba4003703dc601b7b01d5a5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
# -*- Mode: perl; indent-tabs-mode: nil -*-
#
# The contents of this file are subject to the Mozilla Public
# License Version 1.1 (the "License"); you may not use this file
# except in compliance with the License. You may obtain a copy of
# the License at http://www.mozilla.org/MPL/
#
# Software distributed under the License is distributed on an "AS
# IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
# implied. See the License for the specific language governing
# rights and limitations under the License.
#
# The Original Code is the Bugzilla Bug Tracking System.
#
# Contributor(s): John Keiser <john@johnkeiser.com>
#                 Frédéric Buclin <LpSolit@gmail.com>

use strict;

package Bugzilla::Attachment::PatchReader;

use Bugzilla::Error;
use Bugzilla::Attachment;
use Bugzilla::Util;

use Encode;

sub process_diff {
    my ($attachment, $format, $context) = @_;
    my $dbh = Bugzilla->dbh;
    my $cgi = Bugzilla->cgi;
    my $lc  = Bugzilla->localconfig;
    my $vars = {};

    my ($reader, $last_reader) = setup_patch_readers(undef, $context);

    if ($format eq 'raw') {
        require PatchReader::DiffPrinter::raw;
        $last_reader->sends_data_to(new PatchReader::DiffPrinter::raw());
        # Actually print out the patch.
        print $cgi->header(-type => 'text/plain',
                           -expires => '+3M');
        disable_utf8();
        $reader->iterate_string('Attachment ' . $attachment->id, $attachment->data);
    }
    else {
        my @other_patches = ();
        if ($lc->{interdiffbin} && $lc->{diffpath}) {
            # Get the list of attachments that the user can view in this bug.
            my @attachments =
                @{Bugzilla::Attachment->get_attachments_by_bug($attachment->bug_id)};
            # Extract patches only.
            @attachments = grep {$_->ispatch == 1} @attachments;
            # We want them sorted from newer to older.
            @attachments = sort { $b->id <=> $a->id } @attachments;

            # Ignore the current patch, but select the one right before it
            # chronologically.
            my $select_next_patch = 0;
            foreach my $attach (@attachments) {
                if ($attach->id == $attachment->id) {
                    $select_next_patch = 1;
                }
                else {
                    push(@other_patches, { 'id'       => $attach->id,
                                           'desc'     => $attach->description,
                                           'selected' => $select_next_patch });
                    $select_next_patch = 0;
                }
            }
        }

        $vars->{'bugid'} = $attachment->bug_id;
        $vars->{'attachid'} = $attachment->id;
        $vars->{'description'} = $attachment->description;
        $vars->{'other_patches'} = \@other_patches;

        setup_template_patch_reader($last_reader, $format, $context, $vars);
        # The patch is going to be displayed in a HTML page and if the utf8
        # param is enabled, we have to encode attachment data as utf8.
        # Encode::decode() knows what to do with invalid characters.
        if (Bugzilla->params->{'utf8'}) {
            $attachment->{data} = Encode::decode_utf8($attachment->data);
        }
        $reader->iterate_string('Attachment ' . $attachment->id, $attachment->data);
    }
}

sub process_interdiff {
    my ($old_attachment, $new_attachment, $format, $context) = @_;
    my $cgi = Bugzilla->cgi;
    my $lc  = Bugzilla->localconfig;
    my $vars = {};

    # Encode attachment data as utf8 if it's going to be displayed in a HTML
    # page using the UTF-8 encoding.
    # Encode::decode() knows what to do with invalid characters.
    if ($format ne 'raw' && Bugzilla->params->{'utf8'}) {
        $old_attachment->{data} = Encode::decode_utf8($old_attachment->data);
        $new_attachment->{data} = Encode::decode_utf8($new_attachment->data);
    }

    # Get old patch data.
    my ($old_filename, $old_file_list) = get_unified_diff($old_attachment, $format);
    # Get new patch data.
    my ($new_filename, $new_file_list) = get_unified_diff($new_attachment, $format);

    my $warning = warn_if_interdiff_might_fail($old_file_list, $new_file_list);

    # Send through interdiff, send output directly to template.
    # Must hack path so that interdiff will work.
    $ENV{'PATH'} = $lc->{diffpath};
    open my $interdiff_fh, "$lc->{interdiffbin} $old_filename $new_filename|";
    binmode $interdiff_fh;
    my ($reader, $last_reader) = setup_patch_readers("", $context);

    if ($format eq 'raw') {
        require PatchReader::DiffPrinter::raw;
        $last_reader->sends_data_to(new PatchReader::DiffPrinter::raw());
        # Actually print out the patch.
        print $cgi->header(-type => 'text/plain',
                           -expires => '+3M');
        disable_utf8();
    }
    else {
        # In case the HTML page is displayed with the UTF-8 encoding.
        binmode $interdiff_fh, ':utf8' if Bugzilla->params->{'utf8'};

        $vars->{'warning'} = $warning if $warning;
        $vars->{'bugid'} = $new_attachment->bug_id;
        $vars->{'oldid'} = $old_attachment->id;
        $vars->{'old_desc'} = $old_attachment->description;
        $vars->{'newid'} = $new_attachment->id;
        $vars->{'new_desc'} = $new_attachment->description;

        setup_template_patch_reader($last_reader, $format, $context, $vars);
    }
    $reader->iterate_fh($interdiff_fh, 'interdiff #' . $old_attachment->id .
                        ' #' . $new_attachment->id);
    close $interdiff_fh;
    $ENV{'PATH'} = '';

    # Delete temporary files.
    unlink($old_filename) or warn "Could not unlink $old_filename: $!";
    unlink($new_filename) or warn "Could not unlink $new_filename: $!";
}

######################
#  Internal routines
######################

sub get_unified_diff {
    my ($attachment, $format) = @_;

    # Bring in the modules we need.
    require PatchReader::Raw;
    require PatchReader::FixPatchRoot;
    require PatchReader::DiffPrinter::raw;
    require PatchReader::PatchInfoGrabber;
    require File::Temp;

    $attachment->ispatch
      || ThrowCodeError('must_be_patch', { 'attach_id' => $attachment->id });

    # Reads in the patch, converting to unified diff in a temp file.
    my $reader = new PatchReader::Raw;
    my $last_reader = $reader;

    # Fixes patch root (makes canonical if possible).
    if (Bugzilla->params->{'cvsroot'}) {
        my $fix_patch_root =
            new PatchReader::FixPatchRoot(Bugzilla->params->{'cvsroot'});
        $last_reader->sends_data_to($fix_patch_root);
        $last_reader = $fix_patch_root;
    }

    # Grabs the patch file info.
    my $patch_info_grabber = new PatchReader::PatchInfoGrabber();
    $last_reader->sends_data_to($patch_info_grabber);
    $last_reader = $patch_info_grabber;

    # Prints out to temporary file.
    my ($fh, $filename) = File::Temp::tempfile();
    if ($format ne 'raw' && Bugzilla->params->{'utf8'}) {
        # The HTML page will be displayed with the UTF-8 encoding.
        binmode $fh, ':utf8';
    }
    my $raw_printer = new PatchReader::DiffPrinter::raw($fh);
    $last_reader->sends_data_to($raw_printer);
    $last_reader = $raw_printer;

    # Iterate!
    $reader->iterate_string($attachment->id, $attachment->data);

    return ($filename, $patch_info_grabber->patch_info()->{files});
}

sub warn_if_interdiff_might_fail {
    my ($old_file_list, $new_file_list) = @_;

    # Verify that the list of files diffed is the same.
    my @old_files = sort keys %{$old_file_list};
    my @new_files = sort keys %{$new_file_list};
    if (@old_files != @new_files
        || join(' ', @old_files) ne join(' ', @new_files))
    {
        return 'interdiff1';
    }

    # Verify that the revisions in the files are the same.
    foreach my $file (keys %{$old_file_list}) {
        if ($old_file_list->{$file}{old_revision} ne
            $new_file_list->{$file}{old_revision})
        {
            return 'interdiff2';
        }
    }
    return undef;
}

sub setup_patch_readers {
    my ($diff_root, $context) = @_;

    # Parameters:
    # format=raw|html
    # context=patch|file|0-n
    # collapsed=0|1
    # headers=0|1

    # Define the patch readers.
    # The reader that reads the patch in (whatever its format).
    require PatchReader::Raw;
    my $reader = new PatchReader::Raw;
    my $last_reader = $reader;
    # Fix the patch root if we have a cvs root.
    if (Bugzilla->params->{'cvsroot'}) {
        require PatchReader::FixPatchRoot;
        $last_reader->sends_data_to(new PatchReader::FixPatchRoot(Bugzilla->params->{'cvsroot'}));
        $last_reader->sends_data_to->diff_root($diff_root) if defined($diff_root);
        $last_reader = $last_reader->sends_data_to;
    }

    # Add in cvs context if we have the necessary info to do it
    if ($context ne 'patch' && Bugzilla->localconfig->{cvsbin} 
        && Bugzilla->params->{'cvsroot_get'}) 
    {
        require PatchReader::AddCVSContext;
        # We need to set $cvsbin as global, because PatchReader::CVSClient
        # needs it in order to find 'cvs'.
        $main::cvsbin = Bugzilla->localconfig->{cvsbin};
        $last_reader->sends_data_to(
          new PatchReader::AddCVSContext($context, Bugzilla->params->{'cvsroot_get'}));
        $last_reader = $last_reader->sends_data_to;
    }

    return ($reader, $last_reader);
}

sub setup_template_patch_reader {
    my ($last_reader, $format, $context, $vars) = @_;
    my $cgi = Bugzilla->cgi;
    my $template = Bugzilla->template;

    require PatchReader::DiffPrinter::template;

    # Define the vars for templates.
    if (defined $cgi->param('headers')) {
        $vars->{'headers'} = $cgi->param('headers');
    }
    else {
        $vars->{'headers'} = 1;
    }

    $vars->{'collapsed'} = $cgi->param('collapsed');
    $vars->{'context'} = $context;
    $vars->{'do_context'} = Bugzilla->localconfig->{cvsbin} 
                            && Bugzilla->params->{'cvsroot_get'} && !$vars->{'newid'};

    # Print everything out.
    print $cgi->header(-type => 'text/html',
                       -expires => '+3M');

    $last_reader->sends_data_to(new PatchReader::DiffPrinter::template($template,
                                "attachment/diff-header.$format.tmpl",
                                "attachment/diff-file.$format.tmpl",
                                "attachment/diff-footer.$format.tmpl",
                                { %{$vars},
                                  bonsai_url => Bugzilla->params->{'bonsai_url'},
                                  lxr_url => Bugzilla->params->{'lxr_url'},
                                  lxr_root => Bugzilla->params->{'lxr_root'},
                                }));
}

1;

__END__