User defined methods to be added to String.
Replace the file extension with newext. If there is no extension on the string, append the new extension to the end. If the new extension is not given, or is the empty string, remove any existing extension.
ext is a user added method for the String class.
# File lib/rake.rb, line 84 84: def ext(newext='') 85: return self.dup if ['.', '..'].include? self 86: if newext != '' 87: newext = (newext =~ /^\./) ? newext : ("." + newext) 88: end 89: self.chomp(File.extname(self)) << newext 90: end
Map the path according to the given specification. The specification controls the details of the mapping. The following special patterns are recognized:
%p — The complete path.
%f — The base file name of the path, with its file extension, but without any directories.
%n — The file name of the path without its file extension.
%d — The directory list of the path.
%x — The file extension of the path. An empty string if there is no extension.
%X — Everything but the file extension.
%s — The alternate file separater if defined, otherwise use the standard file separator.
%% — A percent sign.
The %d specifier can also have a numeric prefix (e.g. ’%2d’). If the number is positive, only return (up to) n directories in the path, starting from the left hand side. If n is negative, return (up to) |n| directories from the right hand side of the path.
Examples:
'a/b/c/d/file.txt'.pathmap("%2d") => 'a/b' 'a/b/c/d/file.txt'.pathmap("%-2d") => 'c/d'
Also the %d, %p, %f, %n, %x, and %X operators can take a pattern/replacement argument to perform simple string substititions on a particular part of the path. The pattern and replacement are speparated by a comma and are enclosed by curly braces. The replacement spec comes after the % character but before the operator letter. (e.g. “%{old,new}d”). Muliple replacement specs should be separated by semi-colons (e.g. “%{old,new;src,bin}d”).
Regular expressions may be used for the pattern, and back refs may be used in the replacement text. Curly braces, commas and semi-colons are excluded from both the pattern and replacement text (let’s keep parsing reasonable).
For example:
"src/org/onestepback/proj/A.java".pathmap("%{^src,bin}X.class")
returns:
"bin/org/onestepback/proj/A.class"
If the replacement text is ’*’, then a block may be provided to perform some arbitrary calculation for the replacement.
For example:
"/path/to/file.TXT".pathmap("%X%{.*,*}x") { |ext| ext.downcase }
Returns:
"/path/to/file.txt"
# File lib/rake.rb, line 200 200: def pathmap(spec=nil, &block) 201: return self if spec.nil? 202: result = '' 203: spec.scan(/%\{[^}]*\}-?\d*[sdpfnxX%]|%-?\d+d|%.|[^%]+/) do |frag| 204: case frag 205: when '%f' 206: result << File.basename(self) 207: when '%n' 208: result << File.basename(self).ext 209: when '%d' 210: result << File.dirname(self) 211: when '%x' 212: result << File.extname(self) 213: when '%X' 214: result << self.ext 215: when '%p' 216: result << self 217: when '%s' 218: result << (File::ALT_SEPARATOR || File::SEPARATOR) 219: when '%-' 220: # do nothing 221: when '%%' 222: result << "%" 223: when /%(-?\d+)d/ 224: result << pathmap_partial($1.to_i) 225: when /^%\{([^}]*)\}(\d*[dpfnxX])/ 226: patterns, operator = $1, $2 227: result << pathmap('%' + operator).pathmap_replace(patterns, &block) 228: when /^%/ 229: fail ArgumentError, "Unknown pathmap specifier #{frag} in '#{spec}'" 230: else 231: result << frag 232: end 233: end 234: result 235: end
Explode a path into individual components. Used by pathmap.
# File lib/rake.rb, line 95 95: def pathmap_explode 96: head, tail = File.split(self) 97: return [self] if head == self 98: return [tail] if head == '.' || tail == '/' 99: return [head, tail] if head == '/' 100: return head.pathmap_explode + [tail] 101: end
Extract a partial path from the path. Include n directories from the front end (left hand side) if n is positive. Include |n| directories from the back end (right hand side) if n is negative.
# File lib/rake.rb, line 107 107: def pathmap_partial(n) 108: dirs = File.dirname(self).pathmap_explode 109: partial_dirs = 110: if n > 0 111: dirs[0...n] 112: elsif n < 0 113: dirs.reverse[0...-n].reverse 114: else 115: "." 116: end 117: File.join(partial_dirs) 118: end
Preform the pathmap replacement operations on the given path. The patterns take the form ‘pat1,rep1;pat2,rep2...’.
# File lib/rake.rb, line 123 123: def pathmap_replace(patterns, &block) 124: result = self 125: patterns.split(';').each do |pair| 126: pattern, replacement = pair.split(',') 127: pattern = Regexp.new(pattern) 128: if replacement == '*' && block_given? 129: result = result.sub(pattern, &block) 130: elsif replacement 131: result = result.sub(pattern, replacement) 132: else 133: result = result.sub(pattern, '') 134: end 135: end 136: result 137: end
Disabled; run with --debug to generate this.
Generated with the Darkfish Rdoc Generator 1.1.6.