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module Usage
def usage_message message
puts ''
puts message
puts ''
exit 0
end
def check_for_env_vars(env_vars, example)
missing = []
env_vars.each do |env_var|
unless ENV[env_var]
missing << env_var
end
end
if !missing.empty?
usage = "Usage: This task requires #{env_vars.to_sentence} - missing #{missing.to_sentence}"
if example
usage += "\nExample: #{example}"
end
usage_message usage
end
end
end
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