Class: RippleNetworks::WarningShot::GemHandler

Inherits:
Object
  • Object
show all
Defined in:
lib/warning_shot/gem_handler.rb

Constant Summary collapse

DEFAULT_VERSION = 
">0.0.0".freeze
CONDITIONAL_RGX = 
/[^\d]*/.freeze
VERSION_RGX = 
/[\d\.]+/.freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(gem_list, do_install = false, install_dir = nil) ⇒ GemHandler

Returns a new instance of GemHandler.



17
18
19
20
21
22
23
24
25
26
27
28
29
 
# File 'lib/warning_shot/gem_handler.rb', line 17

def initialize(gem_list,do_install=false,install_dir=nil)

  @install_dir ||= Gem.dir
  
  @missing_gems = {}
  @installed_gems = []
  @gems_to_install = split(gem_list) 
  @failed_installs = {}
  
  check_gems

  install! if do_install
end

Instance Attribute Details

#failed_installs ⇒ Object (readonly)

Returns the value of attribute failed_installs.



14
15
16
 
# File 'lib/warning_shot/gem_handler.rb', line 14

def failed_installs
  @failed_installs
end

#gems_to_install ⇒ Object (readonly)

Returns the value of attribute gems_to_install.



14
15
16
 
# File 'lib/warning_shot/gem_handler.rb', line 14

def gems_to_install
  @gems_to_install
end

#installed_gems ⇒ Object (readonly)

Returns the value of attribute installed_gems.



14
15
16
 
# File 'lib/warning_shot/gem_handler.rb', line 14

def installed_gems
  @installed_gems
end

#missing_gems ⇒ Object (readonly)

Returns the value of attribute missing_gems.



14
15
16
 
# File 'lib/warning_shot/gem_handler.rb', line 14

def missing_gems
  @missing_gems
end

Instance Method Details

#add(gems) ⇒ Object 



43
44
45
46
 
# File 'lib/warning_shot/gem_handler.rb', line 43

def add(gems)
  @gems_to_install.merge!(split(gems))
  check_gems
end

#install! ⇒ Object 



55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
 
# File 'lib/warning_shot/gem_handler.rb', line 55

def install!
  @failed_installs = {}
  
  #RubyGems DependencyInstaller installs all dependencies, and the gem, woot!
  @missing_gems.each do |gem_name,gem_version|
    begin
			dep_inst = Gem::DependencyInstaller.new(gem_name,gem_version,{:install_dir => @install_dir})
		rescue Exception => e
			#Invalid Gem Name / Version
      @failed_installs[gem_name] = "Bad gem name or version #{gem_name} #{gem_version}"
		end
    
    #Determine what dependencies are missing
    dep_inst.gather_dependencies

		#Install missing dependencies
		begin
		  dep_inst.install
		  @installed_gems.push(*dep_inst.installed_gems)
    rescue Errno::EACCES => e
      @failed_installs[gem_name] = "Invalid permissions . . . try running w/ sudo"
		rescue Gem::FilePermissionError => e
		  @failed_installs[gem_name] = "Invalid permissions . . . try running w/ sudo"
		rescue Exception => e
      @failed_installs[gem_name] = e.message
  end
  end
  
  Gem::cache.refresh!
  check_gems
  
  return @failed_installs.length == 0
end

#installed?(gem_name, gem_version = DEFAULT_VERSION) ⇒ Boolean

Name

installed?

Access

public

Description

Determine if gem is installed

Last_Edited

Tue Feb 19 12:40:40 PST 2008

===Parameters
* Name: gem_name
  * Description: rubygems gem name (case sensitive)
  * Datatype: String
  * Default: None
  * Required: True
* Name: gem_version
  * Description:  Gem version (ex ">= 1.0.3", "< 3.0", "3.0.1")
  * Datatype: String
  * Default: "> 0.0.0"
  * Required: false
===Returns
*Description*:: Information queried gem
*Datatype*:: Hash

Returns:

  • (Boolean) 


110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
 
# File 'lib/warning_shot/gem_handler.rb', line 110

def installed?(gem_name,gem_version=DEFAULT_VERSION)
  gem_info = {}
  
  installed_versions = Gem::cache.search(gem_name)
  
  unless installed_versions.empty?  
    #Gem is installed, determine version
    
    version_info        = []
    comparison_results  = []
    
    conditionals        = gem_version.match(CONDITIONAL_RGX)[0]          
    required_version    = Gem::Version.create gem_version.match(VERSION_RGX)[0] 
    
    installed_versions.each do |i_gem|
      comp_result = required_version <=> i_gem.version
      version_info.push(i_gem.version.version)
      comparison_results.push(comp_result) unless comparison_results.include? comp_result
    end
    
    gem_info[:versions] = version_info.join(",")
    
    if comparison_results.include?(0) && (conditionals =~ /=/ || conditionals.empty?) # && (conditionals =~ /<>/).nil?
      #Correct version installed
      gem_info[:installed] = true
      gem_info[:info] = "#{gem_name}:#{gem_version} is installed"
    elsif comparison_results.include?(1) && (conditionals =~ /</)
      #Older version installed
      gem_info[:installed] = true
      gem_info[:info] = "Older version installed"
    elsif comparison_results.include?(-1) && (conditionals =~ />/)
      #Newer version installed
      gem_info[:installed] = true
      gem_info[:info] = "Newer version installed"
    else
      gem_info[:installed] = false
      gem_info[:info] = "Other version installed"
    end
  else 
    #Gem is NOT installed
    gem_info[:installed] = false
    gem_info[:info] = "No versions installed"
  end

  return gem_info  
end

#remove(gems) ⇒ Object 



49
50
51
52
 
# File 'lib/warning_shot/gem_handler.rb', line 49

def remove(gems)
  gems.collect { |g| @gems_to_install.delete(g) }
  check_gems
end

#split(gem_list) ⇒ Object 



32
33
34
35
36
37
38
39
40
 
# File 'lib/warning_shot/gem_handler.rb', line 32

def split(gem_list)
  gems = {}
  gem_list.collect do |gem|
    gem_name, gem_ver = gem.chomp.split(":")
    gems[gem_name]    = gem_ver || DEFAULT_VERSION     #Default to newest gem
  end
  
  return gems
end