1 files changed, 139 insertions, 0 deletions
diff --git a/scripts/context/ruby/base/merge.rb b/scripts/context/ruby/base/merge.rb
new file mode 100644
index 000000000..a66b97e91
--- /dev/null
+++ b/scripts/context/ruby/base/merge.rb
@@ -0,0 +1,139 @@
+# 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