module SM
##
# Handle common directives that can occur in a block of text:
#
# : include : filename
#
class PreProcess
def initialize(input_file_name, include_path)
@input_file_name = input_file_name
@include_path = include_path
end
# Look for common options in a chunk of text. Options that
# we don't handle are passed back to our caller
# as |directive, param|
def handle(text)
text.gsub!(/^([ \t#]*):(\w+):\s*(.+)?\n/) do
prefix = $1
directive = $2.downcase
param = $3
case directive
when "include"
filename = param.split[0]
include_file(filename, prefix)
else
yield(directive, param)
end
end
end
#######
private
#######
# Include a file, indenting it correctly
def include_file(name, indent)
if (full_name = find_include_file(name))
content = File.open(full_name) {|f| f.read}
# strip leading '#'s, but only if all lines start with them
if content =~ /^[^#]/
content.gsub(/^/, indent)
else
content.gsub(/^#?/, indent)
end
else
$stderr.puts "Couldn't find file to include: '#{name}'"
''
end
end
# Look for the given file in the directory containing the current
# file, and then in each of the directories specified in the
# RDOC_INCLUDE path
def find_include_file(name)
to_search = [ File.dirname(@input_file_name) ].concat @include_path
to_search.each do |dir|
full_name = File.join(dir, name)
stat = File.stat(full_name) rescue next
return full_name if stat.readable?
end
nil
end
end
end
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