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# module : base/merge
# copyright : PRAGMA Advanced Document Engineering
# version : 2006
# author : Hans Hagen
#
# project : ConTeXt / eXaMpLe
# concept : Hans Hagen
# info : j.hagen@xs4all.nl
# www : www.pragma-ade.com
# --selfmerg ewill create stand alone script (--selfcleanup does the opposite)
# this module will package all the used modules in the file itself
# so that we can relocate the file at wish, usage:
#
# merge:
#
# unless SelfMerge::ok? && SelfMerge::merge then
# puts("merging should happen on the path were the base inserts reside")
# end
#
# cleanup:
#
# unless SelfMerge::cleanup then
# puts("merging should happen on the path were the base inserts reside")
# end
module SelfMerge
@@kpsemergestart = "\# kpse_merge_start"
@@kpsemergestop = "\# kpse_merge_stop"
@@kpsemergefile = "\# kpse_merge_file: "
@@kpsemergedone = "\# kpse_merge_done: "
@@filename = File.basename($0)
@@ownpath = File.expand_path(File.dirname($0))
@@modroot = '(base|graphics|rslb|www)' # needed in regex in order not to mess up SelfMerge
@@modules = $".collect do |file| File.expand_path(file) end
@@modules.delete_if do |file|
file !~ /^#{@@ownpath}\/#{@@modroot}.*$/i
end
def SelfMerge::ok?
begin
@@modules.each do |file|
return false unless FileTest.file?(file)
end
rescue
return false
else
return true
end
end
def SelfMerge::merge
begin
if SelfMerge::ok? && rbfile = IO.read(@@filename) then
begin
inserts = "#{@@kpsemergestart}\n\n"
@@modules.each do |file|
inserts << "#{@@kpsemergefile}'#{file}'\n\n"
inserts << IO.read(file).gsub(/^#.*?\n$/,'')
inserts << "\n\n"
end
inserts << "#{@@kpsemergestop}\n\n"
# no gsub! else we end up in SelfMerge
rbfile.sub!(/#{@@kpsemergestart}\s*#{@@kpsemergestop}/moi) do
inserts
end
rbfile.gsub!(/^(.*)(require [\"\'].*?#{@@modroot}.*)$/) do
pre, post = $1, $2
if pre =~ /#{@@kpsemergedone}/ then
"#{pre}#{post}"
else
"#{pre}#{@@kpsemergedone}#{post}"
end
end
rescue
return false
else
begin
File.open(@@filename,'w') do |f|
f << rbfile
end
rescue
return false
end
end
end
rescue
return false
else
return true
end
end
def SelfMerge::cleanup
begin
if rbfile = IO.read(@@filename) then
begin
rbfile.sub!(/#{@@kpsemergestart}(.*)#{@@kpsemergestop}\s*/moi) do
"#{@@kpsemergestart}\n\n#{@@kpsemergestop}\n\n"
end
rbfile.gsub!(/^(.*#{@@kpsemergedone}.*)$/) do
str = $1
if str =~ /require [\"\']/ then
str.gsub(/#{@@kpsemergedone}/, '')
else
str
end
end
rescue
return false
else
begin
File.open(@@filename,'w') do |f|
f << rbfile
end
rescue
return false
end
end
end
rescue
return false
else
return true
end
end
def SelfMerge::replace
if SelfMerge::ok? then
SelfMerge::cleanup
SelfMerge::merge
end
end
end
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