remove sqlite3 as a gem dependency and convert to an optional dependency required for SketchRipper

Author: pzaich

README.md

@@ -22,7 +22,7 @@ File format | Supported? | Dependencies
 .docx       |     x      |
 .pdf        |     x      |   Poppler-utils
 .txt        |     x      |
-.sketch     |     x      |
+.sketch     |     x      |   Sqlite3
 
 ## Quickstart
 
@@ -63,3 +63,4 @@ File format | Supported? | Dependencies
  - Ruby version >= 1.9.2
  - [Poppler-utils/(pdftotext)](http://poppler.freedesktop.org/) (PDF)
  - [Antiword](http://www.winfield.demon.nl/) (docx) more info: http://linux.die.net/man/1/antiword
+ - Sketch support requires sqlite3 and the [sqlite3 gem](https://rubygems.org/gems/sqlite3) gem

doc_ripper.gemspec

@@ -21,8 +21,8 @@ Gem::Specification.new do |spec|
   spec.requirements << 'Antiword'
   spec.requirements << "pdftotext/poppler"
 
-  spec.add_dependency "sqlite3", "~> 1.3.11"
   spec.add_dependency "CFPropertyList", '~> 2.3'
+  spec.add_dependency 'colored', '~> 1.2'
 
   spec.add_development_dependency "bundler", "~> 1.6"
   spec.add_development_dependency "rake", "~> 10.0"

lib/doc_ripper.rb

@@ -1,5 +1,4 @@
 require 'shellwords'
-require "sqlite3"
 require "doc_ripper/version"
 require "doc_ripper/base"
 require "doc_ripper/text_ripper"
@@ -21,4 +20,4 @@ def rip!(path)
       text || raise(FileNotFound)
     end
   end
-end
+end

lib/doc_ripper/formats/sketch_ripper.rb

@@ -1,9 +1,22 @@
 require 'cfpropertylist'
+require 'colored'
+
+SQLITE_LOAD_WARNING = 'SQLite3 optional dependency not found. Sketch files are not supported in this mode.'.yellow
+
+begin
+  # gem 'sqlite3'
+  require 'sqlite3'
+rescue LoadError
+  warn SQLITE_LOAD_WARNING
+end
 
 module DocRipper
   module Formats
     class SketchRipper < Ripper::Base
 
+      class Sqlite3NotFound < StandardError
+      end
+
       class CFPropertyList::CFString
         def to_s
           value
@@ -33,6 +46,11 @@ def sketch_page?
         end
       end
 
+      def initialize(file_path, options= {})
+        raise Sqlite3NotFound if !defined?(SQLite3)
+        super
+      end
+
       def read_type
         :mem
       end
@@ -79,4 +97,4 @@ def text_objects(data)
       end
     end
   end
-end
+end

lib/doc_ripper/version.rb

@@ -1,5 +1,5 @@
 module DocRipper
-  VERSION = "0.0.7.1"
+  VERSION = "0.0.7.2"
 end