1 package Catalyst::Utils;
9 use FindBin qw/ $Bin /;
11 use String::RewritePrefix;
12 use List::MoreUtils qw/ any /;
18 Catalyst::Utils - The Catalyst Utils
30 =head2 appprefix($class)
32 MyApp::Foo becomes myapp_foo
43 =head2 class2appclass($class);
45 MyApp::Controller::Foo::Bar becomes MyApp
46 My::App::Controller::Foo::Bar becomes My::App
51 my $class = shift || '';
53 if ( $class =~ /^(.+?)::([MVC]|Model|View|Controller)::.+$/ ) {
59 =head2 class2classprefix($class);
61 MyApp::Controller::Foo::Bar becomes MyApp::Controller
62 My::App::Controller::Foo::Bar becomes My::App::Controller
66 sub class2classprefix {
67 my $class = shift || '';
69 if ( $class =~ /^(.+?::([MVC]|Model|View|Controller))::.+$/ ) {
75 =head2 class2classsuffix($class);
77 MyApp::Controller::Foo::Bar becomes Controller::Foo::Bar
81 sub class2classsuffix {
82 my $class = shift || '';
83 my $prefix = class2appclass($class) || '';
84 $class =~ s/$prefix\:://;
88 =head2 class2env($class);
90 Returns the environment name for class.
93 My::App becomes MY_APP
98 my $class = shift || '';
103 =head2 class2prefix( $class, $case );
105 Returns the uri prefix for a class. If case is false the prefix is converted to lowercase.
107 My::App::Controller::Foo::Bar becomes foo/bar
112 my $class = shift || '';
113 my $case = shift || 0;
115 if ( $class =~ /^.+?::([MVC]|Model|View|Controller)::(.+)$/ ) {
116 $prefix = $case ? $2 : lc $2;
117 $prefix =~ s{::}{/}g;
122 =head2 class2tempdir( $class [, $create ] );
124 Returns a tempdir for a class. If create is true it will try to create the path.
126 My::App becomes /tmp/my/app
127 My::App::Controller::Foo::Bar becomes /tmp/my/app/c/foo/bar
132 my $class = shift || '';
133 my $create = shift || 0;
134 my @parts = split '::', lc $class;
136 my $tmpdir = dir( File::Spec->tmpdir, @parts )->cleanup;
138 if ( $create && !-e $tmpdir ) {
140 eval { $tmpdir->mkpath };
143 # don't load Catalyst::Exception as a BEGIN in Utils,
144 # because Utils often gets loaded before MyApp.pm, and if
145 # Catalyst::Exception is loaded before MyApp.pm, it does
147 # $Catalyst::Exception::CATALYST_EXCEPTION_CLASS in
149 require Catalyst::Exception;
150 Catalyst::Exception->throw(
151 message => qq/Couldn't create tmpdir '$tmpdir', "$@"/ );
155 return $tmpdir->stringify;
158 =head2 dist_indicator_file_list
160 Returns a list of files which can be tested to check if you're inside a checkout
164 sub dist_indicator_file_list {
165 qw/ Makefile.PL Build.PL dist.ini /;
170 Returns home directory for given class.
172 Note that the class must be loaded for the home directory to be found using this function.
179 # make an $INC{ $key } style string from the class name
180 (my $file = "$class.pm") =~ s{::}{/}g;
182 if ( my $inc_entry = $INC{$file} ) {
184 # look for an uninstalled Catalyst app
186 # find the @INC entry in which $file was found
187 (my $path = $inc_entry) =~ s/$file$//;
188 my $home = find_home_unloaded_in_checkout($path);
189 return $home if $home;
193 # look for an installed Catalyst app
195 # trim the .pm off the thing ( Foo/Bar.pm -> Foo/Bar/ )
196 ( my $path = $inc_entry) =~ s/\.pm$//;
197 my $home = dir($path)->absolute->cleanup;
199 # return if if it's a valid directory
200 return $home->stringify if -d $home;
208 =head2 find_home_unloaded_in_checkout ($path)
210 Tries to determine if C<$path> (or $FindBin::Bin if not supplied)
211 looks like a checkout. Any leading lib, script or blib components
212 will be removed, then the directory produced will be checked
213 for the existence of a C<< dist_indicator_file_list() >>.
215 If one is found, the directory will be returned, otherwise false.
219 sub find_home_unloaded_in_checkout {
221 $path ||= $Bin if !defined $path || !length $path;
222 my $home = dir($path)->absolute->cleanup;
224 # pop off /lib and /blib if they're there
225 $home = $home->parent while $home =~ /b?lib$/;
226 # pop off /script if it's there.
227 $home = $home->parent while $home =~ /b?script$/;
229 # only return the dir if it has a Makefile.PL or Build.PL or dist.ini
230 if (any { $_ } map { -f $home->file($_) } dist_indicator_file_list()) {
232 # clean up relative path:
233 # MyApp/script/.. -> MyApp
236 my @dir_list = $home->dir_list();
237 while (($dir = pop(@dir_list)) && $dir eq '..') {
238 $home = dir($home)->parent->parent;
241 return $home->stringify;
246 =head2 prefix($class, $name);
248 Returns a prefixed action.
250 MyApp::Controller::Foo::Bar, yada becomes foo/bar/yada
255 my ( $class, $name ) = @_;
256 my $prefix = &class2prefix($class);
257 $name = "$prefix/$name" if $prefix;
263 Returns an L<HTTP::Request> object for a uri.
269 unless ( ref $request ) {
270 if ( $request =~ m/^http/i ) {
271 $request = URI->new($request);
274 $request = URI->new( 'http://localhost' . $request );
277 unless ( ref $request eq 'HTTP::Request' ) {
278 $request = HTTP::Request->new( 'GET', $request );
283 =head2 ensure_class_loaded($class_name, \%opts)
285 Loads the class unless it already has been loaded.
287 If $opts{ignore_loaded} is true always tries the require whether the package
288 already exists or not. Only pass this if you're either (a) sure you know the
289 file exists on disk or (b) have code to catch the file not found exception
290 that will result if it doesn't.
294 sub ensure_class_loaded {
298 croak "Malformed class Name $class"
299 if $class =~ m/(?:\b\:\b|\:{3,})/;
301 croak "Malformed class Name $class"
302 if $class =~ m/[^\w:]/;
304 croak "ensure_class_loaded should be given a classname, not a filename ($class)"
305 if $class =~ m/\.pm$/;
307 # $opts->{ignore_loaded} can be set to true, and this causes the class to be required, even
308 # if it already has symbol table entries. This is to support things like Schema::Loader, which
309 # part-generate classes in memory, but then also load some of their contents from disk.
310 return if !$opts->{ ignore_loaded }
311 && Class::MOP::is_class_loaded($class); # if a symbol entry exists we don't load again
313 # this hack is so we don't overwrite $@ if the load did not generate an error
317 my $file = $class . '.pm';
319 eval { CORE::require($file) };
323 die $error if $error;
325 warn "require $class was successful but the package is not defined."
326 unless Class::MOP::is_class_loaded($class);
331 =head2 merge_hashes($hashref, $hashref)
333 Base code to recursively merge two hashes together with right-hand precedence.
338 my ( $lefthash, $righthash ) = @_;
340 return $lefthash unless defined $righthash;
342 my %merged = %$lefthash;
343 for my $key ( keys %$righthash ) {
344 my $right_ref = ( ref $righthash->{ $key } || '' ) eq 'HASH';
345 my $left_ref = ( ( exists $lefthash->{ $key } && ref $lefthash->{ $key } ) || '' ) eq 'HASH';
346 if( $right_ref and $left_ref ) {
347 $merged{ $key } = merge_hashes(
348 $lefthash->{ $key }, $righthash->{ $key }
352 $merged{ $key } = $righthash->{ $key };
359 =head2 env_value($class, $key)
361 Checks for and returns an environment value. For instance, if $key is
362 'home', then this method will check for and return the first value it finds,
363 looking at $ENV{MYAPP_HOME} and $ENV{CATALYST_HOME}.
368 my ( $class, $key ) = @_;
371 my @prefixes = ( class2env($class), 'CATALYST' );
373 for my $prefix (@prefixes) {
374 if ( defined( my $value = $ENV{"${prefix}_${key}"} ) ) {
384 Try to guess terminal width to use with formatting of debug output
386 All you need to get this work, is:
388 1) Install Term::Size::Any, or
390 2) Export $COLUMNS from your shell.
392 (Warning to bash users: 'echo $COLUMNS' may be showing you the bash
393 variable, not $ENV{COLUMNS}. 'export COLUMNS=$COLUMNS' and you should see
394 that 'env' now lists COLUMNS.)
396 As last resort, default value of 80 chars will be used.
403 return $_term_width if $_term_width;
407 my ($columns, $rows) = Term::Size::Any::chars;
412 $width = $ENV{COLUMNS}
413 if exists($ENV{COLUMNS})
414 && $ENV{COLUMNS} =~ m/^\d+$/;
417 $width = 80 unless ($width && $width >= 80);
418 return $_term_width = $width;
422 =head2 resolve_namespace
424 Method which adds the namespace for plugins and actions.
426 __PACKAGE__->setup(qw(MyPlugin));
428 # will load Catalyst::Plugin::MyPlugin
433 sub resolve_namespace {
434 my $appnamespace = shift;
435 my $namespace = shift;
437 return String::RewritePrefix->rewrite({
438 q[] => qq[${namespace}::],
440 (defined $appnamespace
441 ? (q[~] => qq[${appnamespace}::])
450 Catalyst Contributors, see Catalyst.pm
454 This library is free software. You can redistribute it and/or modify it under
455 the same terms as Perl itself.