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module Neovim
# Object representing the `nvim` executable.
class Executable
VERSION_PATTERN = /\ANVIM v?(.+)$/
class Error < RuntimeError; end
# Load the current executable from the +NVIM_EXECUTABLE+ environment
# variable.
#
# @param env [Hash]
# @return [Executable]
def self.from_env(env=ENV)
new(env.fetch("NVIM_EXECUTABLE", "nvim"))
end
attr_reader :path
def initialize(path)
@path = path
end
# Fetch the +nvim+ version.
#
# @return [String]
def version
@version ||= IO.popen([@path, "--version"]) do |io|
io.gets[VERSION_PATTERN, 1]
end
rescue => e
raise Error, "Couldn't load #{@path}: #{e}"
end
end
end
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