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# Copyright 2010-2011 Wincent Colaiuta. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
require 'command-t/vim'
require 'command-t/scanner'
module CommandT
# Reads the current directory recursively for the paths to all regular files.
class FileScanner < Scanner
class FileLimitExceeded < ::RuntimeError; end
def initialize path = Dir.pwd, options = {}
@path = path
@max_depth = options[:max_depth] || 15
@max_files = options[:max_files] || 10_000
@scan_dot_directories = options[:scan_dot_directories] || false
end
def paths
return @paths unless @paths.nil?
begin
@paths = []
@depth = 0
@files = 0
@prefix_len = @path.chomp('/').length
add_paths_for_directory @path, @paths
rescue FileLimitExceeded
end
@paths
end
def flush
@paths = nil
end
def path= str
if @path != str
@path = str
flush
end
end
private
def path_excluded? path
# first strip common prefix (@path) from path to match VIM's behavior
path = path[(@prefix_len + 1)..-1]
path = VIM::escape_for_single_quotes path
::VIM::evaluate("empty(expand(fnameescape('#{path}')))").to_i == 1
end
def add_paths_for_directory dir, accumulator
Dir.foreach(dir) do |entry|
next if ['.', '..'].include?(entry)
path = File.join(dir, entry)
unless path_excluded?(path)
if File.file?(path)
@files += 1
raise FileLimitExceeded if @files > @max_files
accumulator << path[@prefix_len + 1..-1]
elsif File.directory?(path)
next if @depth >= @max_depth
next if (entry.match(/\A\./) && !@scan_dot_directories)
@depth += 1
add_paths_for_directory path, accumulator
@depth -= 1
end
end
end
rescue Errno::EACCES
# skip over directories for which we don't have access
end
end # class FileScanner
end # module CommandT
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