From d1e0bf10159968bf7c1679cc59d5c2d23726d4f6 Mon Sep 17 00:00:00 2001
From: Sami Samhuri <sami@samhuri.net>
Date: Fri, 6 Dec 2019 11:28:23 -0800
Subject: [PATCH] Add OS version munging script

---
 crunch-sessions-by-major-os-version.rb | 28 ++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100755 crunch-sessions-by-major-os-version.rb

diff --git a/crunch-sessions-by-major-os-version.rb b/crunch-sessions-by-major-os-version.rb
new file mode 100755
index 0000000..ad46bfc
--- /dev/null
+++ b/crunch-sessions-by-major-os-version.rb
@@ -0,0 +1,28 @@
+#!/usr/bin/env ruby -w
+
+require 'csv'
+
+HEADERS = %w[version sessions].freeze
+
+in_csv = CSV.new(ARGF)
+is_header = true
+
+zero_hash = Hash.new { |k, v| 0 }
+sessions_by_version = in_csv.inject(zero_hash) do |h, row|
+  if is_header
+    is_header = false
+    next h
+  end
+
+  version = row[1]
+  sessions = row[2].to_i
+  major_version = version.split('.').first
+  h[major_version] += sessions
+  h
+end
+
+puts CSV.generate_line(HEADERS)
+sessions_by_version.keys.map(&:to_i).sort.each do |version|
+  out_row = [version, sessions_by_version[version.to_s]]
+  puts CSV.generate_line(out_row)
+end