1Refactor(3) User Contributed Perl Documentation Refactor(3)
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6 Devel::Refactor - Perl extension for refactoring Perl code.
7
9 $Revision: $ This is the CVS revision number.
10
12 use Devel::Refactor;
13 my $refactory = Devel::Refactor->new;
15 my ($new_sub_call,$new_sub_code) =
17 $refactory->extract_subroutine($sub_name, $code_snippet);
18 my $files_to_change = $refactory->rename_subroutine('./path/to/dir',
20 'oldSubName','newSubName');
21 # $files_to_change is a hashref where keys are file names, and values are
22 # arrays of hashes with line_number => new_text
23
25 Perl module that facilitates refactoring Perl code.
26
28 The Devel::Refactor module is for code refactoring.
29 While Devel::Refactor may be used from Perl programs, it is also
31 designed to be used with the EPIC plug-in for the eclipse integrated
32 development environment.
33
35 Just the constructor for now.
36 new
38 Returns a new Devel::Refactor object.
39
41 Call on a object returned by new().
42 extract_subroutine($new_name,$old_code [,$syntax_check])
44 Pass it a snippet of Perl code that belongs in its own subroutine as
45 well as a name for that sub. It figures out which variables need to be
46 passed into the sub, and which variables might be passed back. It then
47 produces the sub along with a call to the sub.
48 Hashes and arrays within the code snippet are converted to hashrefs and
50 arrayrefs.
51 If the syntax_check argument is true then a sytax check is performed on
53 the refactored code.
54 Example:
56 $new_name = 'newSub';
58 $old_code = <<'eos';
59 my @results;
60 my %hash;
61 my $date = localtime;
62 $hash{foo} = 'value 1';
63 $hash{bar} = 'value 2';
64 for my $loopvar (@array) {
65 print "Checking $loopvar\n";
66 push @results, $hash{$loopvar} || '';
67 }
68 eos
69 ($new_sub_call,$new_code) = $refactory->extract_subroutine($new_name,$old_code);
71 # $new_sub_call is 'my ($date, $hash, $results) = newSub (\@array);'
72 # $new_code is
73 # sub newSub {
74 # my $array = shift;
75 #
76 # my @results;
77 # my %hash;
78 # my $date = localtime;
79 # $hash{foo} = 'value 1';
80 # $hash{bar} = 'value 2';
81 # for my $loopvar (@$array) {
82 # print "Checking $loopvar\n";
83 # push @results, $hash{$loopvar} || '';
84 # }
85 #
86 #
87 # return ($date, \%hash, \@results);
88 # }
89 Included in the examples directory is a script for use in KDE under
91 Linux. The script gets its code snippet from the KDE clipboard and
92 returns the transformed code the same way. The new sub name is
93 prompted for via STDIN.
94 rename_subroutine($where,$old_name,$new_name,[$max_depth])
96 where is one of:
97 path-to-file
98 path-to-directory
99 If where is a directory then all Perl files (default is ".pl", ".pm",
101 and ".pod" See the perl_file_extensions method.) in that directory and
102 its' descendents (to max_depth deep,) are searched.
103 Default for max_depth is 0 -- just the directory itself; max_depth of 1
105 means the specified directory, and it's immeadiate sub-directories;
106 max_depth of 2 means the specified directory, it's sub-directories, and
107 their sub-directrories, and so forth. If you want to scan very deep,
108 use a high number like 99.
109 If no matches are found then returns undef, otherwise:
111 Returns a hashref that tells you which files you might want to change,
113 and for each file gives you the line numbers and proposed new text for
114 that line. The hashref looks like this, where old_name was found on
115 two lines in the first file and on one line in the second file:
116 {
118 ./path/to/file1.pl => [
119 { 11 => "if (myClass->newName($x)) {\n" },
120 { 27 => "my $result = myClass->newName($foo);\n"},
121 ],
122 ./path/to/file2.pm => [
123 { 235 => "sub newName {\n"},
124 ],
125 }
126 The keys are paths to individual files. The values are arraryrefs
128 containing hashrefs where the keys are the line numbers where old_name
129 was found and the values are the proposed new line, with old_name
130 changed to new_name.
131 is_perlfile($filename)
133 Takes a filename or path and returns true if the file has one of the
134 extensions in perl_file_extensions, otherwise returns false.
135
137 These object methods return various data structures that may be stored
138 in a Devel::Refactor object. In some cases the method also allows
139 setting the property, e.g. perl_file_extensions.
140 get_new_code
142 Returns the return_snippet object property.
143 get_eval_results
145 Returns the eval_err object property.
146 get_sub_call
148 Returns the return_sub_call object property.
149 get_scalars
151 Returns an array of the keys from scalar_vars object property.
152 get_arrays
154 Returns an array of the keys from the array_vars object property.
155 get_hashes
157 Returns an array of the keys from the hash_vars object property.
158 get_local_scalars
160 Returns an array of the keys from the local_scalars object property.
161 get_local_arrays
163 Returns an array of the keys from the local_arrays object property.
164 get_local_hashes
166 Returns an array of the keys from the local_hashes object property.
167 perl_file_extensions([$arrayref|$hashref])
169 Returns a hashref where the keys are regular expressions that match
170 filename extensions that we think are for Perl files. Default are
171 ".pl", ".pm", and ".pod"
172 If passed a hashref then it replaces the current values for this
174 object. The keys should be regular expressions, e.g. "\.cgi$".
175 If passed an arrayref then the list of values are added as valid Perl
177 filename extensions. The list should be filename extensions, NOT
178 regular expressions, For example:
179 my @additonal_filetypes = qw( .ipl .cgi );
181 my $new_hash = $refactory->perl_file_extensions(\@additional_filetypes);
182 # $new_hash = {
183 # '\.pl$' => 1,
184 # '\.pm$' => 1,
185 # '\.pod$' => 1,
186 # '\.ipl$' => 1,
187 # '\.cgi$' => 1,
188 # '\.t$' => 1,
189 # }
190
192 Come up with a more uniform approach to ACCESSORS.
193 Add more refactoring features, such as add_parameter.
194 Add a SEE ALSO section with URLs for eclipse/EPIC, refactoring.com,
195 etc.
196
198 Scott Sotka, <ssotka@barracudanetworks.com>
199
201 Copyright 2005 by Scott Sotka
202 This library is free software; you can redistribute it and/or modify it
204 under the same terms as Perl itself.
205perl v5.34.0 2021-07-22 Refactor(3)