1 | # ------------------------------------------------------------------------------ |
---|
2 | # (C) British Crown Copyright 2006-17 Met Office. |
---|
3 | # |
---|
4 | # This file is part of FCM, tools for managing and building source code. |
---|
5 | # |
---|
6 | # FCM is free software: you can redistribute it and/or modify |
---|
7 | # it under the terms of the GNU General Public License as published by |
---|
8 | # the Free Software Foundation, either version 3 of the License, or |
---|
9 | # (at your option) any later version. |
---|
10 | # |
---|
11 | # FCM is distributed in the hope that it will be useful, |
---|
12 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
---|
14 | # GNU General Public License for more details. |
---|
15 | # |
---|
16 | # You should have received a copy of the GNU General Public License |
---|
17 | # along with FCM. If not, see <http://www.gnu.org/licenses/>. |
---|
18 | # ------------------------------------------------------------------------------ |
---|
19 | use strict; |
---|
20 | use warnings; |
---|
21 | |
---|
22 | # Utility to manipulate FCM commit messages. |
---|
23 | package FCM::System::CM::CommitMessage; |
---|
24 | use base qw{FCM::Class::CODE}; |
---|
25 | |
---|
26 | use Cwd qw{cwd}; |
---|
27 | use FCM::Context::Event; |
---|
28 | use FCM::System::Exception; |
---|
29 | use File::Spec::Functions qw{catfile}; |
---|
30 | use File::Temp; |
---|
31 | use Text::ParseWords qw{shellwords}; |
---|
32 | |
---|
33 | my $CTX = 'FCM::System::CM::CommitMessage::State'; |
---|
34 | my $E = 'FCM::System::Exception'; |
---|
35 | |
---|
36 | our $COMMIT_MESSAGE_BASE = '#commit_message#'; |
---|
37 | our $DELIMITER_USER |
---|
38 | = '--Add your commit message ABOVE - do not alter this line or those below--' |
---|
39 | . "\n"; |
---|
40 | our $DELIMITER_AUTO |
---|
41 | = '--FCM message (will be inserted automatically)--' |
---|
42 | . "\n"; |
---|
43 | our $DELIMITER_INFO |
---|
44 | = '--Change summary (not part of commit message)--' |
---|
45 | . "\n"; |
---|
46 | our $EDITOR = 'vi'; |
---|
47 | our $GEDITOR = 'gvim -f'; |
---|
48 | our $SUBVERSION_CONFIG_FILE = catfile((getpwuid($<))[7], qw{.subversion/config}); |
---|
49 | |
---|
50 | __PACKAGE__->class({gui => '$', util => '&'}, |
---|
51 | {action_of => { |
---|
52 | 'ctx' => sub {$CTX->new()}, |
---|
53 | 'edit' => \&_edit, |
---|
54 | 'load' => \&_load, |
---|
55 | 'notify' => \&_notify, |
---|
56 | 'path' => \&_path, |
---|
57 | 'path_base' => sub {$COMMIT_MESSAGE_BASE}, |
---|
58 | 'save' => \&_save, |
---|
59 | 'temp' => \&_temp, |
---|
60 | }}, |
---|
61 | ); |
---|
62 | |
---|
63 | # Invokes an editor to edit the commit message context. |
---|
64 | sub _edit { |
---|
65 | my ($attrib_ref, $commit_message_ctx) = @_; |
---|
66 | my $UTIL = $attrib_ref->{'util'}; |
---|
67 | my $temp = File::Temp->new(); |
---|
68 | if ($commit_message_ctx->get_user_part()) { |
---|
69 | print($temp $commit_message_ctx->get_user_part()); |
---|
70 | } |
---|
71 | else { |
---|
72 | print($temp "\n"); |
---|
73 | } |
---|
74 | print($temp $DELIMITER_USER); |
---|
75 | if ($commit_message_ctx->get_auto_part()) { |
---|
76 | print($temp $DELIMITER_AUTO . $commit_message_ctx->get_auto_part()); |
---|
77 | } |
---|
78 | print($temp $DELIMITER_INFO . $commit_message_ctx->get_info_part()); |
---|
79 | close($temp) || die("$temp: $!\n"); |
---|
80 | my $config_value; |
---|
81 | my $editor_command |
---|
82 | = $ENV{'SVN_EDITOR'} ? $ENV{'SVN_EDITOR'} |
---|
83 | : ($config_value = _svn_config_get($attrib_ref, 'helpers', 'editor-cmd')) |
---|
84 | ? $config_value |
---|
85 | : $ENV{'VISUAL'} ? $ENV{'VISUAL'} |
---|
86 | : $ENV{'EDITOR'} ? $ENV{'EDITOR'} |
---|
87 | : $attrib_ref->{gui} ? $GEDITOR |
---|
88 | : $EDITOR |
---|
89 | ; |
---|
90 | $UTIL->event(FCM::Context::Event->CM_LOG_EDIT, $editor_command); |
---|
91 | my @command = (shellwords($editor_command), $temp->filename()); |
---|
92 | !system(@command) |
---|
93 | || return $E->throw($E->SHELL, {command_list => \@command, rc => $?}); |
---|
94 | # Note: cannot use FCM::Util->shell method for terminal based editor. |
---|
95 | #my %value_of = %{$attrib_ref->{'util'}->shell_simple(\@command)}; |
---|
96 | #if ($value_of{'rc'}) { |
---|
97 | # return $E->throw($E->SHELL, {command_list => \@command, %value_of}); |
---|
98 | #} |
---|
99 | my $user_part = _parse( |
---|
100 | $attrib_ref, |
---|
101 | scalar($UTIL->file_load($temp->filename())), |
---|
102 | $DELIMITER_USER, |
---|
103 | ); |
---|
104 | $commit_message_ctx->set_user_part($user_part); |
---|
105 | if (($user_part . $commit_message_ctx->get_auto_part()) =~ qr{\A\s*\z}msx) { |
---|
106 | return $E->throw($E->CM_LOG_EDIT_NULL); |
---|
107 | } |
---|
108 | } |
---|
109 | |
---|
110 | # Reads a commit message file from $path or the standard location. Returns a |
---|
111 | # commit message context object. |
---|
112 | sub _load { |
---|
113 | my ($attrib_ref, $path) = @_; |
---|
114 | $path ||= _path($attrib_ref); |
---|
115 | my ($user_part, $auto_part) = eval { |
---|
116 | _parse($attrib_ref, scalar($attrib_ref->{'util'}->file_load($path))); |
---|
117 | }; |
---|
118 | if (my $e = $@) { |
---|
119 | $user_part = q{}; |
---|
120 | $auto_part = q{}; |
---|
121 | $@ = undef; # TODO: should raise a high verbosity event? |
---|
122 | } |
---|
123 | $CTX->new({'user_part' => $user_part, 'auto_part' => $auto_part}); |
---|
124 | } |
---|
125 | |
---|
126 | # Raises an CM_COMMIT_MESSAGE event for the commit message. |
---|
127 | sub _notify { |
---|
128 | my ($attrib_ref, $commit_message_ctx) = @_; |
---|
129 | $attrib_ref->{util}->event( |
---|
130 | FCM::Context::Event->CM_COMMIT_MESSAGE, $commit_message_ctx, |
---|
131 | ); |
---|
132 | } |
---|
133 | |
---|
134 | # Parses a commit message into the user and auto parts. Returns the user part in |
---|
135 | # scalar context. Returns (user_part, auto_part) in list context. |
---|
136 | sub _parse { |
---|
137 | my ($attrib_ref, $message, $no_delimiter_user) = @_; |
---|
138 | my @parts = (q{}, q{}); |
---|
139 | my $state = 0; |
---|
140 | LINE: |
---|
141 | for my $line (split("\n", $message)) { |
---|
142 | if ($state && !wantarray()) { |
---|
143 | last LINE; |
---|
144 | } |
---|
145 | $line .= "\n"; |
---|
146 | if ($line eq $DELIMITER_INFO) { |
---|
147 | last LINE; |
---|
148 | } |
---|
149 | elsif ($line eq $DELIMITER_AUTO) { |
---|
150 | $state = 1; |
---|
151 | next LINE; |
---|
152 | } |
---|
153 | elsif ($line eq $DELIMITER_USER) { |
---|
154 | $no_delimiter_user = undef; |
---|
155 | $state = -1; |
---|
156 | next LINE; |
---|
157 | } |
---|
158 | if ($state >= 0) { |
---|
159 | $parts[$state] .= $line; |
---|
160 | } |
---|
161 | } |
---|
162 | if ($no_delimiter_user) { |
---|
163 | return $E->throw($E->CM_LOG_EDIT_DELIMITER, $DELIMITER_USER); |
---|
164 | } |
---|
165 | for my $part (@parts) { |
---|
166 | $part =~ s{\A\s*(.*?)\s*\z}{$1}msx; |
---|
167 | if ($part) { |
---|
168 | $part .= "\n"; |
---|
169 | } |
---|
170 | } |
---|
171 | wantarray() ? @parts : $parts[0]; |
---|
172 | } |
---|
173 | |
---|
174 | # Returns the path to the commit message file in the current working directory |
---|
175 | # or the commit message file in $dir if $dir is set. |
---|
176 | sub _path { |
---|
177 | my ($attrib_ref, $dir) = @_; |
---|
178 | catfile(($dir ? $dir : cwd()), $COMMIT_MESSAGE_BASE); |
---|
179 | } |
---|
180 | |
---|
181 | # Saves the commit message to $path or the standard location for later |
---|
182 | # retrieval. |
---|
183 | sub _save { |
---|
184 | my ($attrib_ref, $commit_message_ctx, $path) = @_; |
---|
185 | $path ||= _path($attrib_ref); |
---|
186 | my $string = $commit_message_ctx->get_user_part(); |
---|
187 | if ($commit_message_ctx->get_auto_part()) { |
---|
188 | $string .= $DELIMITER_AUTO . $commit_message_ctx->get_auto_part(); |
---|
189 | } |
---|
190 | $attrib_ref->{'util'}->file_save($path, $string); |
---|
191 | } |
---|
192 | |
---|
193 | # Returns a File::Temp object containing a commit message ready for the VCS. |
---|
194 | sub _temp { |
---|
195 | my ($attrib_ref, $commit_message_ctx) = @_; |
---|
196 | my $temp = File::Temp->new(); |
---|
197 | print($temp $commit_message_ctx->get_user_part()); |
---|
198 | print($temp $commit_message_ctx->get_auto_part()); |
---|
199 | close($temp) || die("$temp: $!\n"); |
---|
200 | $temp; |
---|
201 | } |
---|
202 | |
---|
203 | # Loads a setting from $HOME/.subversion/config, and returns its value. |
---|
204 | sub _svn_config_get { |
---|
205 | my ($attrib_ref, $section, $key) = @_; |
---|
206 | # Note: can use Config::IniFiles, but best to avoid another dependency. |
---|
207 | # Note: not very efficient logic here, but should not yet matter. |
---|
208 | my $handle = $attrib_ref->{'util'}->file_load_handle($SUBVERSION_CONFIG_FILE); |
---|
209 | my $is_in_section; |
---|
210 | my $value; |
---|
211 | LINE: |
---|
212 | while (my $line = readline($handle)) { |
---|
213 | chomp($line); |
---|
214 | if ($line =~ qr{\A\s*(?:[#;]|\z)}msx) { |
---|
215 | next LINE; |
---|
216 | } |
---|
217 | if ($line =~ qr{\A\s*\[\s*$section\s*\]\s*\z}msx) { |
---|
218 | $is_in_section = 1; |
---|
219 | } |
---|
220 | elsif ($line =~ qr{\A\s*\[}msx) { |
---|
221 | $is_in_section = 0; |
---|
222 | } |
---|
223 | elsif ($is_in_section) { |
---|
224 | my ($rhs) = $line =~ qr{\A\s*$key\s*=\s*(.*)\z}msx; |
---|
225 | if (defined($rhs)) { |
---|
226 | $value = $rhs; |
---|
227 | } |
---|
228 | } |
---|
229 | } |
---|
230 | close($handle); |
---|
231 | $value; |
---|
232 | } |
---|
233 | |
---|
234 | #------------------------------------------------------------------------------- |
---|
235 | package FCM::System::CM::CommitMessage::State; |
---|
236 | use base qw{FCM::Class::HASH}; |
---|
237 | |
---|
238 | __PACKAGE__->class({ |
---|
239 | (map {($_ . '_part' => {isa => '$', default => q{}})} qw{auto info user}), |
---|
240 | }); |
---|
241 | |
---|
242 | #------------------------------------------------------------------------------- |
---|
243 | 1; |
---|
244 | __END__ |
---|
245 | |
---|
246 | =head1 NAME |
---|
247 | |
---|
248 | FCM::System::CM::CommitMessage |
---|
249 | |
---|
250 | =head1 SYNOPSIS |
---|
251 | |
---|
252 | use FCM::System::CM::CommitMessage; |
---|
253 | my $commit_message_util = FCM::System::CM::CommitMessage->new(\%attrib); |
---|
254 | my $commit_message_ctx = $commit_message_util->ctx(); |
---|
255 | $commit_message_util->edit($ctx); |
---|
256 | |
---|
257 | =head1 DESCRIPTION |
---|
258 | |
---|
259 | The commit message dumper, editor, loader, parser, etc for the FCM code |
---|
260 | management sub-system. |
---|
261 | |
---|
262 | =head1 METHODS |
---|
263 | |
---|
264 | =over 4 |
---|
265 | |
---|
266 | =item $class->new(\%attrib) |
---|
267 | |
---|
268 | Return a new instance. This class should normally be initialised by |
---|
269 | L<FCM::System::CM|FCM::System::CM>. |
---|
270 | |
---|
271 | =item $commit_message_util->ctx() |
---|
272 | |
---|
273 | Return a new and empty commit message context. |
---|
274 | |
---|
275 | =item $commit_message_util->edit($commit_message_ctx) |
---|
276 | |
---|
277 | Invoke an editor to edit the commit message context. |
---|
278 | |
---|
279 | =item $commit_message_util->load($path) |
---|
280 | |
---|
281 | Load the content of a commit message file in $path, and return the result in a |
---|
282 | new commit message context. |
---|
283 | |
---|
284 | =item $commit_message_util->notify($commit_message_ctx) |
---|
285 | |
---|
286 | Raise a CM_COMMIT_MESSAGE event with the $commit_message_ctx. |
---|
287 | |
---|
288 | =item $commit_message_util->path($dir) |
---|
289 | |
---|
290 | Return the path to the commit message file in $dir or the current working |
---|
291 | directory if $dir is not specified. |
---|
292 | |
---|
293 | =item $commit_message_util->path($dir) |
---|
294 | |
---|
295 | Return the base name of the commit message file. |
---|
296 | |
---|
297 | =item $commit_message_util->save($commit_message_ctx, $path) |
---|
298 | |
---|
299 | Save the commit message to $path (or the standard location if $path is not |
---|
300 | specified). |
---|
301 | |
---|
302 | =item $commit_message_util->temp() |
---|
303 | |
---|
304 | Return a File::Temp object containing a commit message ready for the VCS. |
---|
305 | |
---|
306 | =back |
---|
307 | |
---|
308 | =head1 COPYRIGHT |
---|
309 | |
---|
310 | (C) Crown copyright Met Office. All rights reserved. |
---|
311 | |
---|
312 | =cut |
---|