mhayes · August 29, 2015 14:22 · Jun 9, 2015 · Jun 9, 2015
diff --git a/renamer.rb b/renamer.rb
@@ -1,6 +1,6 @@
 require "fileutils"
 names  = %w{EXAMPLE_ONE EXAMPLE_TWO}
-sizes = %w{160x600-3 300x250-4 300x600-4 728x90-4}
+sizes = %w{160x600-4}
 expanded_sizes = sizes.map do |s|
   new_sizes = []
   size  = s.split("-")

diff --git a/README.md b/README.md
@@ -0,0 +1,15 @@
+# quickstart
+
+Let's assume you have OS X screenshots named like `Screen Shot 2015-06-09 at 9.39.56 AM.png`. You can use this script to rename them like so:
+
+```bash
+mark:screens mark$ ruby renamer.rb 
+move ./Screen Shot 2015-06-09 at 9.39.56 AM.png to EXAMPLE_ONE_160x600_1.png
+move ./Screen Shot 2015-06-09 at 9.39.57 AM.png to EXAMPLE_ONE_160x600_2.png
+move ./Screen Shot 2015-06-09 at 9.39.58 AM.png to EXAMPLE_ONE_160x600_3.png
+move ./Screen Shot 2015-06-09 at 9.40.00 AM.png to EXAMPLE_ONE_160x600_4.png
+move ./Screen Shot 2015-06-09 at 9.40.30 AM.png to EXAMPLE_TWO_160x600_1.png
+move ./Screen Shot 2015-06-09 at 9.40.31 AM.png to EXAMPLE_TWO_160x600_2.png
+move ./Screen Shot 2015-06-09 at 9.40.32 AM.png to EXAMPLE_TWO_160x600_3.png
+move ./Screen Shot 2015-06-09 at 9.40.34 AM.png to EXAMPLE_TWO_160x600_4.png
+```
diff --git a/renamer.rb b/renamer.rb
@@ -0,0 +1,28 @@
+require "fileutils"
+names  = %w{EXAMPLE_ONE EXAMPLE_TWO}
+sizes = %w{160x600-3 300x250-4 300x600-4 728x90-4}
+expanded_sizes = sizes.map do |s|
+  new_sizes = []
+  size  = s.split("-")
+  dims  = size[0]
+  variations = size[1].to_i
+  variations.times do |i|
+    new_sizes << "#{dims}_#{i+1}"
+  end
+  new_sizes
+end
+expanded_sizes.flatten!
+sizes = []
+names.each do |name|
+  sizes << expanded_sizes.map {|size| "#{name}_#{size}"}
+end
+sizes.flatten!
+
+files = Dir.glob("./Screen*").sort_by {|pth| File.mtime(pth)}
+
+raise Exception unless sizes.length == files.length
+
+files.each_with_index do |path, idx|
+  puts "move #{path} to #{sizes[idx]}.png"
+  FileUtils.mv path, "#{sizes[idx]}.png"
+end
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