List of installed gems?

118

Is there a Ruby method I can call to get the list of installed gems?

I want to parse the output of gem list. Is there a different way to do this?

edited Apr 20 '16 at 1:06

Eric Leschinski

89k40327281

asked Mar 3 '11 at 6:56

Prakash Raman

4,7532259105

add a comment |

118

Is there a Ruby method I can call to get the list of installed gems?

I want to parse the output of gem list. Is there a different way to do this?

edited Apr 20 '16 at 1:06

Eric Leschinski

89k40327281

asked Mar 3 '11 at 6:56

Prakash Raman

4,7532259105

add a comment |

118

Is there a Ruby method I can call to get the list of installed gems?

I want to parse the output of gem list. Is there a different way to do this?

edited Apr 20 '16 at 1:06

Eric Leschinski

89k40327281

asked Mar 3 '11 at 6:56

Prakash Raman

4,7532259105

Is there a Ruby method I can call to get the list of installed gems?

I want to parse the output of gem list. Is there a different way to do this?

ruby rubygems

edited Apr 20 '16 at 1:06

Eric Leschinski

89k40327281

asked Mar 3 '11 at 6:56

Prakash Raman

4,7532259105

edited Apr 20 '16 at 1:06

Eric Leschinski

89k40327281

asked Mar 3 '11 at 6:56

Prakash Raman

4,7532259105

edited Apr 20 '16 at 1:06

Eric Leschinski

89k40327281

edited Apr 20 '16 at 1:06

Eric Leschinski

89k40327281

edited Apr 20 '16 at 1:06

Eric Leschinski

89k40327281

asked Mar 3 '11 at 6:56

Prakash Raman

4,7532259105

asked Mar 3 '11 at 6:56

Prakash Raman

4,7532259105

asked Mar 3 '11 at 6:56

Prakash Raman

4,7532259105

add a comment |

11 Answers
11

active

oldest

votes

The Gem command is included with Ruby 1.9+ now, and is a standard addition to Ruby pre-1.9.

require 'rubygems'



name = /^/i

dep = Gem::Dependency.new(name, Gem::Requirement.default)

specs = Gem.source_index.search(dep)

puts specs[0..5].map{ |s| "#{s.name} #{s.version}" }

# >> Platform 0.4.0

# >> abstract 1.0.0

# >> actionmailer 3.0.5

# >> actionpack 3.0.5

# >> activemodel 3.0.5

# >> activerecord 3.0.5

Here's an updated way to get a list:

require 'rubygems'



def local_gems

   Gem::Specification.sort_by{ |g| [g.name.downcase, g.version] }.group_by{ |g| g.name }

end

Because local_gems relies on group_by, it returns a hash of the gems, where the key is the gem's name, and the value is an array of the gem specifications. The value is an array of the instances of that gem that is installed, sorted by the version number.

That makes it possible to do things like:

my_local_gems = local_gems()



my_local_gems['actionmailer']

# => [Gem::Specification.new do |s|

#       s.authors = ["David Heinemeier Hansson"]

#       s.date = Time.utc(2013, 12, 3)

#       s.dependencies = [Gem::Dependency.new("actionpack",

#         Gem::Requirement.new(["= 4.0.2"]),

#         :runtime),

#        Gem::Dependency.new("mail",

#         Gem::Requirement.new(["~> 2.5.4"]),

#         :runtime)]

#       s.description = "Email on Rails. Compose, deliver, receive, and test emails using the familiar controller/view pattern. First-class support for multipart email and attachments."

#       s.email = "david@loudthinking.com"

#       s.homepage = "http://www.rubyonrails.org"

#       s.licenses = ["MIT"]

#       s.name = "actionmailer"

#       s.require_paths = ["lib"]

#       s.required_ruby_version = Gem::Requirement.new([">= 1.9.3"])

#       s.requirements = ["none"]

#       s.rubygems_version = "2.0.14"

#       s.specification_version = 4

#       s.summary = "Email composition, delivery, and receiving framework (part of Rails)."

#       s.version = Gem::Version.new("4.0.2")

#       end]

And:

puts my_local_gems.map{ |name, specs| 

  [ 

    name,

    specs.map{ |spec| spec.version.to_s }.join(',')

  ].join(' ') 

}

# >> actionmailer 4.0.2

...

# >> arel 4.0.1,5.0.0

...

# >> ZenTest 4.9.5

# >> zucker 13.1

The last example is similar to the gem query --local command-line, only you have access to all the information for a particular gem's specification.

edited Dec 11 '13 at 12:54

answered Mar 3 '11 at 7:22

the Tin Man

136k27173256

2

Should be noted, "Dependency.new w/ a regexp is deprecated" now.

– Martin Poljak
Dec 11 '13 at 9:31

add a comment |

289

This lists all the gems I have installed.

gem query --local

http://guides.rubygems.org/command-reference/#gem-list

See 2.7 Listing all installed gems

edited Jan 26 '17 at 13:46

Bhargav Rao♦

30.7k2092113

answered Mar 9 '13 at 15:08

frankstuner

3,03321214

4

The OP wanted a Ruby method to do it, not a command-line.

– the Tin Man
Dec 11 '13 at 12:15

34

When I look at the upvotes, then this answer is what most people wanted. :)

– kaiser
Sep 8 '14 at 10:22

1

there is a better answer in the question itself gem list.

– blueray
Jul 11 '18 at 14:31

add a comment |

Both

gem query --local

and

 ruby -S gem list --local

list 69 entries

While

ruby -e 'puts Gem::Specification.all_names'

gives me 82

I used wc -l to get the numbers. Not sure if that is the right way to check. Tried to redirect the output to text files and diff'ed but that didn't help - will need to compare manually one by one.

edited Mar 12 '14 at 15:13

tripleee

94.1k13132186

answered Mar 12 '14 at 13:33

Roobie

681718

1

The reason is simple. The first command only adds 1 entry per gem and lists the versions in brackets on the same line. The last ruby command lists each gem version on a separate line. For e.g.: sass (3.3.14, 3.3.7, 3.3.6, 3.2.19) vs. sass-3.3.14, sass-3.3.7, sass-3.3.6, sass-3.2.19

– kaiser
Sep 8 '14 at 10:30

add a comment |

There's been a method for this for ages:

ruby -e 'puts Gem::Specification.all_names'

answered Feb 25 '14 at 14:57

Barry

3,5932839

ruby -e 'puts Gem::Specification.all_names' gives me "-e:1: uninitialized constant Gem (NameError)" How do I solve this?

– Metahuman
Oct 5 '16 at 21:18

add a comment |

Gem::Specification.map {|a| a.name}

However, if your app uses Bundler it will return only list of dependent local gems. To get all installed:

def all_installed_gems

   Gem::Specification.all = nil    

   all = Gem::Specification.map{|a| a.name}  

   Gem::Specification.reset

   all

end

answered Jan 24 '12 at 8:15

Evgenii

21.5k20110141

This gives NoMethodError: undefined method any?' for nil:NilClass` when I use it (in a rails console).

– iconoclast
Feb 9 at 0:38

add a comment |

A more modern version would be to use something akin to the following...

require 'rubygems'

puts Gem::Specification.all().map{|g| [g.name, g.version.to_s].join('-') }

NOTE: very similar the first part of an answer by Evgeny... but due to page formatting, it's easy to miss.

answered May 21 '13 at 15:15

paul.belt

24933

add a comment |

by one command:

Gem::Specification.all_names

answered Dec 22 '17 at 16:27

Игорь Хлебников

512

can you improve your answer?

– MZaragoza
Dec 22 '17 at 17:00

add a comment |

Try it in the terminal:

ruby -S gem list --local

answered Nov 6 '13 at 8:51

Kurt Russell

1241214

1

Notice that the OP wanted a Ruby method.

– the Tin Man
Dec 11 '13 at 12:15

1

good on Kurt for not resting on his laurels, though...

– dax
Nov 6 '14 at 10:31

add a comment |

Here's a really nice one-liner to print all the Gems along with their version, homepage, and description:

Gem::Specification.sort{|a,b| a.name <=> b.name}.map {|a| puts "#{a.name} (#{a.version})"; puts "-" * 50; puts a.homepage; puts a.description; puts "nn"};nil

edited Jan 1 at 22:25

Iulian Onofrei

4,10934279

answered Jul 7 '17 at 21:01

Darren Hicks

3,9162430

add a comment |

Maybe you can get the files (gems) from the gems directory?

gemsdir = "gems directory"

gems = Dir.new(gemsdir).entries

answered Mar 3 '11 at 7:05

Fossmo

1,8262042

add a comment |

From within your debugger type $LOAD_PATH to get a list of your gems. If you don't have a debugger, install pry:

gem install pry

pry

Pry(main)> $LOAD_PATH

This will output an array of your installed gems.

answered Jan 9 '16 at 20:57

Nicolai Robles

874

add a comment |

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11 Answers
11

active

oldest

votes

11 Answers
11

active

oldest

votes

The Gem command is included with Ruby 1.9+ now, and is a standard addition to Ruby pre-1.9.

require 'rubygems'



name = /^/i

dep = Gem::Dependency.new(name, Gem::Requirement.default)

specs = Gem.source_index.search(dep)

puts specs[0..5].map{ |s| "#{s.name} #{s.version}" }

# >> Platform 0.4.0

# >> abstract 1.0.0

# >> actionmailer 3.0.5

# >> actionpack 3.0.5

# >> activemodel 3.0.5

# >> activerecord 3.0.5

Here's an updated way to get a list:

require 'rubygems'



def local_gems

   Gem::Specification.sort_by{ |g| [g.name.downcase, g.version] }.group_by{ |g| g.name }

end

That makes it possible to do things like:

my_local_gems = local_gems()



my_local_gems['actionmailer']

# => [Gem::Specification.new do |s|

#       s.authors = ["David Heinemeier Hansson"]

#       s.date = Time.utc(2013, 12, 3)

#       s.dependencies = [Gem::Dependency.new("actionpack",

#         Gem::Requirement.new(["= 4.0.2"]),

#         :runtime),

#        Gem::Dependency.new("mail",

#         Gem::Requirement.new(["~> 2.5.4"]),

#         :runtime)]

#       s.description = "Email on Rails. Compose, deliver, receive, and test emails using the familiar controller/view pattern. First-class support for multipart email and attachments."

#       s.email = "david@loudthinking.com"

#       s.homepage = "http://www.rubyonrails.org"

#       s.licenses = ["MIT"]

#       s.name = "actionmailer"

#       s.require_paths = ["lib"]

#       s.required_ruby_version = Gem::Requirement.new([">= 1.9.3"])

#       s.requirements = ["none"]

#       s.rubygems_version = "2.0.14"

#       s.specification_version = 4

#       s.summary = "Email composition, delivery, and receiving framework (part of Rails)."

#       s.version = Gem::Version.new("4.0.2")

#       end]

And:

puts my_local_gems.map{ |name, specs| 

  [ 

    name,

    specs.map{ |spec| spec.version.to_s }.join(',')

  ].join(' ') 

}

# >> actionmailer 4.0.2

...

# >> arel 4.0.1,5.0.0

...

# >> ZenTest 4.9.5

# >> zucker 13.1

The last example is similar to the gem query --local command-line, only you have access to all the information for a particular gem's specification.

edited Dec 11 '13 at 12:54

answered Mar 3 '11 at 7:22

the Tin Man

136k27173256

2

Should be noted, "Dependency.new w/ a regexp is deprecated" now.

– Martin Poljak
Dec 11 '13 at 9:31

add a comment |

The Gem command is included with Ruby 1.9+ now, and is a standard addition to Ruby pre-1.9.

require 'rubygems'



name = /^/i

dep = Gem::Dependency.new(name, Gem::Requirement.default)

specs = Gem.source_index.search(dep)

puts specs[0..5].map{ |s| "#{s.name} #{s.version}" }

# >> Platform 0.4.0

# >> abstract 1.0.0

# >> actionmailer 3.0.5

# >> actionpack 3.0.5

# >> activemodel 3.0.5

# >> activerecord 3.0.5

Here's an updated way to get a list:

require 'rubygems'



def local_gems

   Gem::Specification.sort_by{ |g| [g.name.downcase, g.version] }.group_by{ |g| g.name }

end

That makes it possible to do things like:

my_local_gems = local_gems()



my_local_gems['actionmailer']

# => [Gem::Specification.new do |s|

#       s.authors = ["David Heinemeier Hansson"]

#       s.date = Time.utc(2013, 12, 3)

#       s.dependencies = [Gem::Dependency.new("actionpack",

#         Gem::Requirement.new(["= 4.0.2"]),

#         :runtime),

#        Gem::Dependency.new("mail",

#         Gem::Requirement.new(["~> 2.5.4"]),

#         :runtime)]

#       s.description = "Email on Rails. Compose, deliver, receive, and test emails using the familiar controller/view pattern. First-class support for multipart email and attachments."

#       s.email = "david@loudthinking.com"

#       s.homepage = "http://www.rubyonrails.org"

#       s.licenses = ["MIT"]

#       s.name = "actionmailer"

#       s.require_paths = ["lib"]

#       s.required_ruby_version = Gem::Requirement.new([">= 1.9.3"])

#       s.requirements = ["none"]

#       s.rubygems_version = "2.0.14"

#       s.specification_version = 4

#       s.summary = "Email composition, delivery, and receiving framework (part of Rails)."

#       s.version = Gem::Version.new("4.0.2")

#       end]

And:

puts my_local_gems.map{ |name, specs| 

  [ 

    name,

    specs.map{ |spec| spec.version.to_s }.join(',')

  ].join(' ') 

}

# >> actionmailer 4.0.2

...

# >> arel 4.0.1,5.0.0

...

# >> ZenTest 4.9.5

# >> zucker 13.1

The last example is similar to the gem query --local command-line, only you have access to all the information for a particular gem's specification.

edited Dec 11 '13 at 12:54

answered Mar 3 '11 at 7:22

the Tin Man

136k27173256

2

Should be noted, "Dependency.new w/ a regexp is deprecated" now.

– Martin Poljak
Dec 11 '13 at 9:31

add a comment |

The Gem command is included with Ruby 1.9+ now, and is a standard addition to Ruby pre-1.9.

require 'rubygems'



name = /^/i

dep = Gem::Dependency.new(name, Gem::Requirement.default)

specs = Gem.source_index.search(dep)

puts specs[0..5].map{ |s| "#{s.name} #{s.version}" }

# >> Platform 0.4.0

# >> abstract 1.0.0

# >> actionmailer 3.0.5

# >> actionpack 3.0.5

# >> activemodel 3.0.5

# >> activerecord 3.0.5

Here's an updated way to get a list:

require 'rubygems'



def local_gems

   Gem::Specification.sort_by{ |g| [g.name.downcase, g.version] }.group_by{ |g| g.name }

end

That makes it possible to do things like:

my_local_gems = local_gems()



my_local_gems['actionmailer']

# => [Gem::Specification.new do |s|

#       s.authors = ["David Heinemeier Hansson"]

#       s.date = Time.utc(2013, 12, 3)

#       s.dependencies = [Gem::Dependency.new("actionpack",

#         Gem::Requirement.new(["= 4.0.2"]),

#         :runtime),

#        Gem::Dependency.new("mail",

#         Gem::Requirement.new(["~> 2.5.4"]),

#         :runtime)]

#       s.description = "Email on Rails. Compose, deliver, receive, and test emails using the familiar controller/view pattern. First-class support for multipart email and attachments."

#       s.email = "david@loudthinking.com"

#       s.homepage = "http://www.rubyonrails.org"

#       s.licenses = ["MIT"]

#       s.name = "actionmailer"

#       s.require_paths = ["lib"]

#       s.required_ruby_version = Gem::Requirement.new([">= 1.9.3"])

#       s.requirements = ["none"]

#       s.rubygems_version = "2.0.14"

#       s.specification_version = 4

#       s.summary = "Email composition, delivery, and receiving framework (part of Rails)."

#       s.version = Gem::Version.new("4.0.2")

#       end]

And:

puts my_local_gems.map{ |name, specs| 

  [ 

    name,

    specs.map{ |spec| spec.version.to_s }.join(',')

  ].join(' ') 

}

# >> actionmailer 4.0.2

...

# >> arel 4.0.1,5.0.0

...

# >> ZenTest 4.9.5

# >> zucker 13.1

The last example is similar to the gem query --local command-line, only you have access to all the information for a particular gem's specification.

edited Dec 11 '13 at 12:54

answered Mar 3 '11 at 7:22

the Tin Man

136k27173256

The Gem command is included with Ruby 1.9+ now, and is a standard addition to Ruby pre-1.9.

require 'rubygems'



name = /^/i

dep = Gem::Dependency.new(name, Gem::Requirement.default)

specs = Gem.source_index.search(dep)

puts specs[0..5].map{ |s| "#{s.name} #{s.version}" }

# >> Platform 0.4.0

# >> abstract 1.0.0

# >> actionmailer 3.0.5

# >> actionpack 3.0.5

# >> activemodel 3.0.5

# >> activerecord 3.0.5

Here's an updated way to get a list:

require 'rubygems'



def local_gems

   Gem::Specification.sort_by{ |g| [g.name.downcase, g.version] }.group_by{ |g| g.name }

end

That makes it possible to do things like:

my_local_gems = local_gems()



my_local_gems['actionmailer']

# => [Gem::Specification.new do |s|

#       s.authors = ["David Heinemeier Hansson"]

#       s.date = Time.utc(2013, 12, 3)

#       s.dependencies = [Gem::Dependency.new("actionpack",

#         Gem::Requirement.new(["= 4.0.2"]),

#         :runtime),

#        Gem::Dependency.new("mail",

#         Gem::Requirement.new(["~> 2.5.4"]),

#         :runtime)]

#       s.description = "Email on Rails. Compose, deliver, receive, and test emails using the familiar controller/view pattern. First-class support for multipart email and attachments."

#       s.email = "david@loudthinking.com"

#       s.homepage = "http://www.rubyonrails.org"

#       s.licenses = ["MIT"]

#       s.name = "actionmailer"

#       s.require_paths = ["lib"]

#       s.required_ruby_version = Gem::Requirement.new([">= 1.9.3"])

#       s.requirements = ["none"]

#       s.rubygems_version = "2.0.14"

#       s.specification_version = 4

#       s.summary = "Email composition, delivery, and receiving framework (part of Rails)."

#       s.version = Gem::Version.new("4.0.2")

#       end]

And:

puts my_local_gems.map{ |name, specs| 

  [ 

    name,

    specs.map{ |spec| spec.version.to_s }.join(',')

  ].join(' ') 

}

# >> actionmailer 4.0.2

...

# >> arel 4.0.1,5.0.0

...

# >> ZenTest 4.9.5

# >> zucker 13.1

The last example is similar to the gem query --local command-line, only you have access to all the information for a particular gem's specification.

edited Dec 11 '13 at 12:54

answered Mar 3 '11 at 7:22

the Tin Man

136k27173256

edited Dec 11 '13 at 12:54

answered Mar 3 '11 at 7:22

the Tin Man

136k27173256

answered Mar 3 '11 at 7:22

the Tin Man

136k27173256

answered Mar 3 '11 at 7:22

the Tin Man

136k27173256

2

Should be noted, "Dependency.new w/ a regexp is deprecated" now.

– Martin Poljak
Dec 11 '13 at 9:31

add a comment |

2

Should be noted, "Dependency.new w/ a regexp is deprecated" now.

– Martin Poljak
Dec 11 '13 at 9:31

Should be noted, "Dependency.new w/ a regexp is deprecated" now.

– Martin Poljak
Dec 11 '13 at 9:31

add a comment |

289

This lists all the gems I have installed.

gem query --local

http://guides.rubygems.org/command-reference/#gem-list

See 2.7 Listing all installed gems

edited Jan 26 '17 at 13:46

Bhargav Rao♦

30.7k2092113

answered Mar 9 '13 at 15:08

frankstuner

3,03321214

4

The OP wanted a Ruby method to do it, not a command-line.

– the Tin Man
Dec 11 '13 at 12:15

34

When I look at the upvotes, then this answer is what most people wanted. :)

– kaiser
Sep 8 '14 at 10:22

1

there is a better answer in the question itself gem list.

– blueray
Jul 11 '18 at 14:31

add a comment |

289

This lists all the gems I have installed.

gem query --local

http://guides.rubygems.org/command-reference/#gem-list

See 2.7 Listing all installed gems

edited Jan 26 '17 at 13:46

Bhargav Rao♦

30.7k2092113

answered Mar 9 '13 at 15:08

frankstuner

3,03321214

4

The OP wanted a Ruby method to do it, not a command-line.

– the Tin Man
Dec 11 '13 at 12:15

34

When I look at the upvotes, then this answer is what most people wanted. :)

– kaiser
Sep 8 '14 at 10:22

1

there is a better answer in the question itself gem list.

– blueray
Jul 11 '18 at 14:31

add a comment |

289

This lists all the gems I have installed.

gem query --local

http://guides.rubygems.org/command-reference/#gem-list

See 2.7 Listing all installed gems

edited Jan 26 '17 at 13:46

Bhargav Rao♦

30.7k2092113

answered Mar 9 '13 at 15:08

frankstuner

3,03321214

This lists all the gems I have installed.

gem query --local

http://guides.rubygems.org/command-reference/#gem-list

See 2.7 Listing all installed gems

edited Jan 26 '17 at 13:46

Bhargav Rao♦

30.7k2092113

answered Mar 9 '13 at 15:08

frankstuner

3,03321214

edited Jan 26 '17 at 13:46

Bhargav Rao♦

30.7k2092113

edited Jan 26 '17 at 13:46

Bhargav Rao♦

30.7k2092113

edited Jan 26 '17 at 13:46

Bhargav Rao♦

30.7k2092113

answered Mar 9 '13 at 15:08

frankstuner

3,03321214

answered Mar 9 '13 at 15:08

frankstuner

3,03321214

answered Mar 9 '13 at 15:08

frankstuner

3,03321214

4

The OP wanted a Ruby method to do it, not a command-line.

– the Tin Man
Dec 11 '13 at 12:15

34

When I look at the upvotes, then this answer is what most people wanted. :)

– kaiser
Sep 8 '14 at 10:22

1

there is a better answer in the question itself gem list.

– blueray
Jul 11 '18 at 14:31

add a comment |

4

The OP wanted a Ruby method to do it, not a command-line.

– the Tin Man
Dec 11 '13 at 12:15

34

When I look at the upvotes, then this answer is what most people wanted. :)

– kaiser
Sep 8 '14 at 10:22

1

there is a better answer in the question itself gem list.

– blueray
Jul 11 '18 at 14:31

The OP wanted a Ruby method to do it, not a command-line.

– the Tin Man
Dec 11 '13 at 12:15

When I look at the upvotes, then this answer is what most people wanted. :)

– kaiser
Sep 8 '14 at 10:22

there is a better answer in the question itself gem list.

– blueray
Jul 11 '18 at 14:31

add a comment |

Both

gem query --local

and

 ruby -S gem list --local

list 69 entries

While

ruby -e 'puts Gem::Specification.all_names'

gives me 82

I used wc -l to get the numbers. Not sure if that is the right way to check. Tried to redirect the output to text files and diff'ed but that didn't help - will need to compare manually one by one.

edited Mar 12 '14 at 15:13

tripleee

94.1k13132186

answered Mar 12 '14 at 13:33

Roobie

681718

1

The reason is simple. The first command only adds 1 entry per gem and lists the versions in brackets on the same line. The last ruby command lists each gem version on a separate line. For e.g.: sass (3.3.14, 3.3.7, 3.3.6, 3.2.19) vs. sass-3.3.14, sass-3.3.7, sass-3.3.6, sass-3.2.19

– kaiser
Sep 8 '14 at 10:30

add a comment |

Both

gem query --local

and

 ruby -S gem list --local

list 69 entries

While

ruby -e 'puts Gem::Specification.all_names'

gives me 82

I used wc -l to get the numbers. Not sure if that is the right way to check. Tried to redirect the output to text files and diff'ed but that didn't help - will need to compare manually one by one.

edited Mar 12 '14 at 15:13

tripleee

94.1k13132186

answered Mar 12 '14 at 13:33

Roobie

681718

1

The reason is simple. The first command only adds 1 entry per gem and lists the versions in brackets on the same line. The last ruby command lists each gem version on a separate line. For e.g.: sass (3.3.14, 3.3.7, 3.3.6, 3.2.19) vs. sass-3.3.14, sass-3.3.7, sass-3.3.6, sass-3.2.19

– kaiser
Sep 8 '14 at 10:30

add a comment |

Both

gem query --local

and

 ruby -S gem list --local

list 69 entries

While

ruby -e 'puts Gem::Specification.all_names'

gives me 82

I used wc -l to get the numbers. Not sure if that is the right way to check. Tried to redirect the output to text files and diff'ed but that didn't help - will need to compare manually one by one.

edited Mar 12 '14 at 15:13

tripleee

94.1k13132186

answered Mar 12 '14 at 13:33

Roobie

681718

Both

gem query --local

and

 ruby -S gem list --local

list 69 entries

While

ruby -e 'puts Gem::Specification.all_names'

gives me 82

I used wc -l to get the numbers. Not sure if that is the right way to check. Tried to redirect the output to text files and diff'ed but that didn't help - will need to compare manually one by one.

edited Mar 12 '14 at 15:13

tripleee

94.1k13132186

answered Mar 12 '14 at 13:33

Roobie

681718

edited Mar 12 '14 at 15:13

tripleee

94.1k13132186

edited Mar 12 '14 at 15:13

tripleee

94.1k13132186

edited Mar 12 '14 at 15:13

tripleee

94.1k13132186

answered Mar 12 '14 at 13:33

Roobie

681718

answered Mar 12 '14 at 13:33

Roobie

681718

answered Mar 12 '14 at 13:33

Roobie

681718

1

The reason is simple. The first command only adds 1 entry per gem and lists the versions in brackets on the same line. The last ruby command lists each gem version on a separate line. For e.g.: sass (3.3.14, 3.3.7, 3.3.6, 3.2.19) vs. sass-3.3.14, sass-3.3.7, sass-3.3.6, sass-3.2.19

– kaiser
Sep 8 '14 at 10:30

add a comment |

1

The reason is simple. The first command only adds 1 entry per gem and lists the versions in brackets on the same line. The last ruby command lists each gem version on a separate line. For e.g.: sass (3.3.14, 3.3.7, 3.3.6, 3.2.19) vs. sass-3.3.14, sass-3.3.7, sass-3.3.6, sass-3.2.19

– kaiser
Sep 8 '14 at 10:30

The reason is simple. The first command only adds 1 entry per gem and lists the versions in brackets on the same line. The last ruby command lists each gem version on a separate line. For e.g.: sass (3.3.14, 3.3.7, 3.3.6, 3.2.19) vs. sass-3.3.14, sass-3.3.7, sass-3.3.6, sass-3.2.19

– kaiser
Sep 8 '14 at 10:30

add a comment |

There's been a method for this for ages:

ruby -e 'puts Gem::Specification.all_names'

answered Feb 25 '14 at 14:57

Barry

3,5932839

ruby -e 'puts Gem::Specification.all_names' gives me "-e:1: uninitialized constant Gem (NameError)" How do I solve this?

– Metahuman
Oct 5 '16 at 21:18

add a comment |

There's been a method for this for ages:

ruby -e 'puts Gem::Specification.all_names'

answered Feb 25 '14 at 14:57

Barry

3,5932839

ruby -e 'puts Gem::Specification.all_names' gives me "-e:1: uninitialized constant Gem (NameError)" How do I solve this?

– Metahuman
Oct 5 '16 at 21:18

add a comment |

There's been a method for this for ages:

ruby -e 'puts Gem::Specification.all_names'

answered Feb 25 '14 at 14:57

Barry

3,5932839

There's been a method for this for ages:

ruby -e 'puts Gem::Specification.all_names'

answered Feb 25 '14 at 14:57

Barry

3,5932839

answered Feb 25 '14 at 14:57

Barry

3,5932839

answered Feb 25 '14 at 14:57

Barry

3,5932839

answered Feb 25 '14 at 14:57

Barry

3,5932839

ruby -e 'puts Gem::Specification.all_names' gives me "-e:1: uninitialized constant Gem (NameError)" How do I solve this?

– Metahuman
Oct 5 '16 at 21:18

add a comment |

ruby -e 'puts Gem::Specification.all_names' gives me "-e:1: uninitialized constant Gem (NameError)" How do I solve this?

– Metahuman
Oct 5 '16 at 21:18

ruby -e 'puts Gem::Specification.all_names' gives me "-e:1: uninitialized constant Gem (NameError)" How do I solve this?

– Metahuman
Oct 5 '16 at 21:18

add a comment |

Gem::Specification.map {|a| a.name}

However, if your app uses Bundler it will return only list of dependent local gems. To get all installed:

def all_installed_gems

   Gem::Specification.all = nil    

   all = Gem::Specification.map{|a| a.name}  

   Gem::Specification.reset

   all

end

answered Jan 24 '12 at 8:15

Evgenii

21.5k20110141

This gives NoMethodError: undefined method any?' for nil:NilClass` when I use it (in a rails console).

– iconoclast
Feb 9 at 0:38

add a comment |

Gem::Specification.map {|a| a.name}

However, if your app uses Bundler it will return only list of dependent local gems. To get all installed:

def all_installed_gems

   Gem::Specification.all = nil    

   all = Gem::Specification.map{|a| a.name}  

   Gem::Specification.reset

   all

end

answered Jan 24 '12 at 8:15

Evgenii

21.5k20110141

This gives NoMethodError: undefined method any?' for nil:NilClass` when I use it (in a rails console).

– iconoclast
Feb 9 at 0:38

add a comment |

Gem::Specification.map {|a| a.name}

However, if your app uses Bundler it will return only list of dependent local gems. To get all installed:

def all_installed_gems

   Gem::Specification.all = nil    

   all = Gem::Specification.map{|a| a.name}  

   Gem::Specification.reset

   all

end

answered Jan 24 '12 at 8:15

Evgenii

21.5k20110141

Gem::Specification.map {|a| a.name}

However, if your app uses Bundler it will return only list of dependent local gems. To get all installed:

def all_installed_gems

   Gem::Specification.all = nil    

   all = Gem::Specification.map{|a| a.name}  

   Gem::Specification.reset

   all

end

answered Jan 24 '12 at 8:15

Evgenii

21.5k20110141

answered Jan 24 '12 at 8:15

Evgenii

21.5k20110141

answered Jan 24 '12 at 8:15

Evgenii

21.5k20110141

answered Jan 24 '12 at 8:15

Evgenii

21.5k20110141

This gives NoMethodError: undefined method any?' for nil:NilClass` when I use it (in a rails console).

– iconoclast
Feb 9 at 0:38

add a comment |

This gives NoMethodError: undefined method any?' for nil:NilClass` when I use it (in a rails console).

– iconoclast
Feb 9 at 0:38

This gives NoMethodError: undefined method any?' for nil:NilClass` when I use it (in a rails console).

– iconoclast
Feb 9 at 0:38

add a comment |

A more modern version would be to use something akin to the following...

require 'rubygems'

puts Gem::Specification.all().map{|g| [g.name, g.version.to_s].join('-') }

NOTE: very similar the first part of an answer by Evgeny... but due to page formatting, it's easy to miss.

answered May 21 '13 at 15:15

paul.belt

24933

add a comment |

A more modern version would be to use something akin to the following...

require 'rubygems'

puts Gem::Specification.all().map{|g| [g.name, g.version.to_s].join('-') }

NOTE: very similar the first part of an answer by Evgeny... but due to page formatting, it's easy to miss.

answered May 21 '13 at 15:15

paul.belt

24933

add a comment |

A more modern version would be to use something akin to the following...

require 'rubygems'

puts Gem::Specification.all().map{|g| [g.name, g.version.to_s].join('-') }

NOTE: very similar the first part of an answer by Evgeny... but due to page formatting, it's easy to miss.

answered May 21 '13 at 15:15

paul.belt

24933

A more modern version would be to use something akin to the following...

require 'rubygems'

puts Gem::Specification.all().map{|g| [g.name, g.version.to_s].join('-') }

NOTE: very similar the first part of an answer by Evgeny... but due to page formatting, it's easy to miss.

answered May 21 '13 at 15:15

paul.belt

24933

answered May 21 '13 at 15:15

paul.belt

24933

answered May 21 '13 at 15:15

paul.belt

24933

answered May 21 '13 at 15:15

paul.belt

24933

add a comment |

by one command:

Gem::Specification.all_names

answered Dec 22 '17 at 16:27

Игорь Хлебников

512

can you improve your answer?

– MZaragoza
Dec 22 '17 at 17:00

add a comment |

by one command:

Gem::Specification.all_names

answered Dec 22 '17 at 16:27

Игорь Хлебников

512

can you improve your answer?

– MZaragoza
Dec 22 '17 at 17:00

add a comment |

by one command:

Gem::Specification.all_names

answered Dec 22 '17 at 16:27

Игорь Хлебников

512

by one command:

Gem::Specification.all_names

answered Dec 22 '17 at 16:27

Игорь Хлебников

512

answered Dec 22 '17 at 16:27

Игорь Хлебников

512

answered Dec 22 '17 at 16:27

Игорь Хлебников

512

answered Dec 22 '17 at 16:27

Игорь Хлебников

512

can you improve your answer?

– MZaragoza
Dec 22 '17 at 17:00

add a comment |

can you improve your answer?

– MZaragoza
Dec 22 '17 at 17:00

can you improve your answer?

– MZaragoza
Dec 22 '17 at 17:00

add a comment |

Try it in the terminal:

ruby -S gem list --local

answered Nov 6 '13 at 8:51

Kurt Russell

1241214

1

Notice that the OP wanted a Ruby method.

– the Tin Man
Dec 11 '13 at 12:15

1

good on Kurt for not resting on his laurels, though...

– dax
Nov 6 '14 at 10:31

add a comment |

Try it in the terminal:

ruby -S gem list --local

answered Nov 6 '13 at 8:51

Kurt Russell

1241214

1

Notice that the OP wanted a Ruby method.

– the Tin Man
Dec 11 '13 at 12:15

1

good on Kurt for not resting on his laurels, though...

– dax
Nov 6 '14 at 10:31

add a comment |

Try it in the terminal:

ruby -S gem list --local

answered Nov 6 '13 at 8:51

Kurt Russell

1241214

Try it in the terminal:

ruby -S gem list --local

answered Nov 6 '13 at 8:51

Kurt Russell

1241214

answered Nov 6 '13 at 8:51

Kurt Russell

1241214

answered Nov 6 '13 at 8:51

Kurt Russell

1241214

answered Nov 6 '13 at 8:51

Kurt Russell

1241214

1

Notice that the OP wanted a Ruby method.

– the Tin Man
Dec 11 '13 at 12:15

1

good on Kurt for not resting on his laurels, though...

– dax
Nov 6 '14 at 10:31

add a comment |

1

Notice that the OP wanted a Ruby method.

– the Tin Man
Dec 11 '13 at 12:15

1

good on Kurt for not resting on his laurels, though...

– dax
Nov 6 '14 at 10:31

Notice that the OP wanted a Ruby method.

– the Tin Man
Dec 11 '13 at 12:15

good on Kurt for not resting on his laurels, though...

– dax
Nov 6 '14 at 10:31

add a comment |

Here's a really nice one-liner to print all the Gems along with their version, homepage, and description:

Gem::Specification.sort{|a,b| a.name <=> b.name}.map {|a| puts "#{a.name} (#{a.version})"; puts "-" * 50; puts a.homepage; puts a.description; puts "nn"};nil

edited Jan 1 at 22:25

Iulian Onofrei

4,10934279

answered Jul 7 '17 at 21:01

Darren Hicks

3,9162430

add a comment |

Here's a really nice one-liner to print all the Gems along with their version, homepage, and description:

Gem::Specification.sort{|a,b| a.name <=> b.name}.map {|a| puts "#{a.name} (#{a.version})"; puts "-" * 50; puts a.homepage; puts a.description; puts "nn"};nil

edited Jan 1 at 22:25

Iulian Onofrei

4,10934279

answered Jul 7 '17 at 21:01

Darren Hicks

3,9162430

add a comment |

Here's a really nice one-liner to print all the Gems along with their version, homepage, and description:

Gem::Specification.sort{|a,b| a.name <=> b.name}.map {|a| puts "#{a.name} (#{a.version})"; puts "-" * 50; puts a.homepage; puts a.description; puts "nn"};nil

edited Jan 1 at 22:25

Iulian Onofrei

4,10934279

answered Jul 7 '17 at 21:01

Darren Hicks

3,9162430

Here's a really nice one-liner to print all the Gems along with their version, homepage, and description:

Gem::Specification.sort{|a,b| a.name <=> b.name}.map {|a| puts "#{a.name} (#{a.version})"; puts "-" * 50; puts a.homepage; puts a.description; puts "nn"};nil

edited Jan 1 at 22:25

Iulian Onofrei

4,10934279

answered Jul 7 '17 at 21:01

Darren Hicks

3,9162430

edited Jan 1 at 22:25

Iulian Onofrei

4,10934279

edited Jan 1 at 22:25

Iulian Onofrei

4,10934279

edited Jan 1 at 22:25

Iulian Onofrei

4,10934279

answered Jul 7 '17 at 21:01

Darren Hicks

3,9162430

answered Jul 7 '17 at 21:01

Darren Hicks

3,9162430

answered Jul 7 '17 at 21:01

Darren Hicks

3,9162430

add a comment |

Maybe you can get the files (gems) from the gems directory?

gemsdir = "gems directory"

gems = Dir.new(gemsdir).entries

answered Mar 3 '11 at 7:05

Fossmo

1,8262042

add a comment |

Maybe you can get the files (gems) from the gems directory?

gemsdir = "gems directory"

gems = Dir.new(gemsdir).entries

answered Mar 3 '11 at 7:05

Fossmo

1,8262042

add a comment |

Maybe you can get the files (gems) from the gems directory?

gemsdir = "gems directory"

gems = Dir.new(gemsdir).entries

answered Mar 3 '11 at 7:05

Fossmo

1,8262042

Maybe you can get the files (gems) from the gems directory?

gemsdir = "gems directory"

gems = Dir.new(gemsdir).entries

answered Mar 3 '11 at 7:05

Fossmo

1,8262042

answered Mar 3 '11 at 7:05

Fossmo

1,8262042

answered Mar 3 '11 at 7:05

Fossmo

1,8262042

answered Mar 3 '11 at 7:05

Fossmo

1,8262042

add a comment |

From within your debugger type $LOAD_PATH to get a list of your gems. If you don't have a debugger, install pry:

gem install pry

pry

Pry(main)> $LOAD_PATH

This will output an array of your installed gems.

answered Jan 9 '16 at 20:57

Nicolai Robles

874

add a comment |

From within your debugger type $LOAD_PATH to get a list of your gems. If you don't have a debugger, install pry:

gem install pry

pry

Pry(main)> $LOAD_PATH

This will output an array of your installed gems.

answered Jan 9 '16 at 20:57

Nicolai Robles

874

add a comment |

From within your debugger type $LOAD_PATH to get a list of your gems. If you don't have a debugger, install pry:

gem install pry

pry

Pry(main)> $LOAD_PATH

This will output an array of your installed gems.

answered Jan 9 '16 at 20:57

Nicolai Robles

874

From within your debugger type $LOAD_PATH to get a list of your gems. If you don't have a debugger, install pry:

gem install pry

pry

Pry(main)> $LOAD_PATH

This will output an array of your installed gems.

answered Jan 9 '16 at 20:57

Nicolai Robles

874

answered Jan 9 '16 at 20:57

Nicolai Robles

874

answered Jan 9 '16 at 20:57

Nicolai Robles

874

answered Jan 9 '16 at 20:57

Nicolai Robles

874

add a comment |

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