Open a link to a file in Github from the command line.

github_show.sh

#!/usr/bin/env ruby
require 'open-uri'


if ARGV.length == 0
  puts <<-MESSAGE

  GitHub Show Script
  ------------------

  Generates github URLs

  Usage:

  Show a file:             github_show <FILE>[#LINE_NUMBER]
  Show a branch:           github_show branch <BRANCH_NAME>
  Show a diff:             github_show diff [TARGET_BRANCH_NAME] BRANCH_NAME
  Create a pull request:   github_show pr [TARGET_BRANCH_NAME] BRANCH_NAME

  MESSAGE
  exit
end

GITHUB_BASE_URL = "https://github.com"

tmp = `git remote -v`.match(/(\w+)\/(\w+)\.git/)

@owner = tmp[1]
@repo  = tmp[2]


url = "#{GITHUB_BASE_URL}/#{@owner}/#{@repo}/"

def default_branch
  @owner == 'cerego' ? 'stable' : 'master'
end

def current_branch
  `git branch`.scan(/\* (.+)$/)[0]
end

if ARGV[0] == 'show'

  # Commit view:
  # https://github.com/cerego/iknow/commit/a1eaffa69594c7c792a0ab5d366468b2bebb020c

  url << "commit/#{ARGV[1]}"

elsif ARGV[0] == 'branch'

  # Branch view:
  # https://github.com/cerego/iknow/tree/require_authentication_for_teacher_lesson_page_%237183

  branch = ARGV[1]
  url << "tree/#{branch}"

elsif ARGV[0] == 'pr'

  # Pull request view:
  # https://github.com/cerego/iknow/pull/new/require_authentication_for_teacher_lesson_page_%237183

  branch1 = ARGV[1]
  branch2 = ARGV[2]

  if branch1.nil?
    branch1 = current_branch
  end

  if branch2.nil?
    branch2 = branch1
    branch1 = default_branch
  end

  url << "pull/new/#{branch1}...#{branch2}"

elsif ARGV[0] == 'diff'

  # Compare view:
  # https://github.com/cerego/iknow/compare/stable...gge_vote_on_lessons_%237002

  branch1 = ARGV[1]
  branch2 = ARGV[2]

  if branch2.nil?
    branch2 = branch1
    branch1 = default_branch
  end

  url << "compare/#{branch1}...#{branch2}"

else

  # Code view:
  # https://githube.com/cerego/iknow/blob/stable/app/controllers/application_controller.rb

  if ARGV.length == 1
    file = ARGV[0]
    branch = default_branch
  else
    file = ARGV[1]
    branch = ARGV[0]
  end

  if file =~ /#\d+$/
    tmp = file.split('#')
    file = tmp[0]
    line = tmp[1]
  end

  url << "blob/#{branch}/#{file}"

end

url = URI::encode(url)

if line
  url += "#L" + line
end



puts "Opening: #{url}"
#`xdg-open #{url}`

c = <<-COMMAND
if which xdg-open &> /dev/null; then
    xdg-open #{url}
else
    open #{url}
fi
COMMAND

`#{c}`

Try this

if (which xdg-ope2n > /dev/null)
then 
  xdg-open $url &
else
  open $url
fi

make sure that is xdg-open not the ope2n