Daily background logger to write completed TaskPaper tasks (system-wide) to a Day One entry

tp-dailylog.rb

#!/usr/bin/ruby
# tp-dailylog.rb - Log TaskPaper tasks completed on the current day to a Day One entry
# Brett Terpstra 2012 <http://brettterpstra.com>
# 
# Run it with launchd at 11pm and forget about it
# 
# Notes:
# * Uses `mdfind` to locate all .taskpaper files changed in the last day
# * Scans for @done(xxxx-xx-xx) tags in each line matching today's date
# * Does not alter TaskPaper files in any way
# * Does not require the Day One CLI tool
# * Only generates report if there are completed tasks found
# * It's configured to locate an iCloud-synced journal. 
#   If you use Dropbox or other, you'll want to just hardcode the path (comment line 23, edit `dayonepath` line 24)
# * To set the automatic Day One entries to starred, just change `starred = false` to true

require 'time'
require 'erb'

uuid = %x{uuidgen}.gsub(/-/,'').strip
datestamp = Time.now.utc.iso8601
starred = false

dayonedir = %x{ls ~/Library/Mobile\\ Documents/|grep dayoneapp}.strip
dayonepath = "~/Library/Mobile\ Documents/#{dayonedir}/Documents/Journal_dayone/entries/"

template = ERB.new <<-XMLTEMPLATE
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>Creation Date</key>
	<date><%= datestamp %></date>
	<key>Entry Text</key>
	<string><%= entrytext %></string>
	<key>Starred</key>
	<<%= starred %>/>
	<key>UUID</key>
	<string><%= uuid %></string>
</dict>
</plist>
XMLTEMPLATE

today = Time.now().strftime('%Y-%m-%d')
files = %x{mdfind 'kMDItemContentModificationDate >= "$time.today(-1)" && kMDItemKind == "TaskPaperDocumentType"'}

projects = []
files.each do |file|
	if File.exists?(file.strip)
		f = File.open(file.strip)
		lines = f.read
		f.close
		project = "### " + File.dirname(file).gsub(/^.*?\/([^\/]+)$/,"\\1") + ":\n\n"
		found_completed = false
		lines.each do |line|
			if line =~ /@done\(#{today}\)/
				found_completed = true
				project += line.gsub(/@done\(.*?\)/,'').strip + "\n" 
			end
		end
		if found_completed
			projects.push(project)
		end
	end
end

def e_sh(str)
	str.to_s.gsub(/(?=["\\])/, '\\')
end

if projects.length > 0
	entrytext = "# Task report for #{today}\n\n"
	projects.each do |project|
		entrytext += project + "\n\n"
	end
	fh = File.new(File.expand_path(dayonepath+uuid+".doentry"),'w+')
	fh.puts template.result(binding)
	fh.close
end

I had to add lines = lines.split("\n") between lines 52 and 53 for this to work on my Mavericks installation. (After the f.close line.)
Otherwise I got ./tp-dailylog.rb:55:in 'block in <main>': undefined method 'each' for #<String:0x007fcd1b103c78> (NoMethodError)