generic_erb.rb: -i option

* tool/generic_erb.rb: -i option to merge multiple template files.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60083 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 10 insertions, 5 deletions

diff --git a/tool/generic_erb.rb b/tool/generic_erb.rb
index 08077f2dbc..c9986c7284 100644
--- a/tool/generic_erb.rb
+++ b/tool/generic_erb.rb
@@ -16,24 +16,29 @@ output = nil
 ifchange = nil
 source = false
 color = nil
+templates = []
 
-opt = OptionParser.new do |o|
+ARGV.options do |o|
   o.on('-t', '--timestamp[=PATH]') {|v| timestamp = v || true}
+  o.on('-i', '--input=PATH') {|v| template << v}
   o.on('-o', '--output=PATH') {|v| output = v}
   o.on('-c', '--[no-]if-change') {|v| ifchange = v}
   o.on('-x', '--source') {source = true}
   o.on('--color') {color = true}
   vpath.def_options(o)
   o.order!(ARGV)
+  templates << (ARGV.shift or abort o.to_s) if templates.empty?
 end
 color = Colorize.new(color)
 unchanged = color.pass("unchanged")
 updated = color.fail("updated")
 
-template = ARGV.shift or abort opt.to_s
-erb = ERB.new(File.read(template), nil, '%-')
-erb.filename = template
-result = source ? erb.src : proc{erb.result}.call
+result = templates.map do |template|
+  erb = ERB.new(File.read(template), nil, '%-')
+  erb.filename = template
+  source ? erb.src : proc{erb.result(binding)}.call
+end
+result = result.size == 1 ? result[0] : result.join("")
 if output
   if ifchange and (vpath.open(output, "rb") {|f| f.read} rescue nil) == result
     puts "#{output} #{unchanged}"