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require 'md5'
module LeapCli
class FileMissing < Exception
attr_reader :file_path
def initialize(file_path)
@file_path = file_path
end
end
module Util
extend self
##
## QUITTING
##
#
# quit and print help
#
def help!(message=nil)
ENV['GLI_DEBUG'] = "false"
help_now!(message)
#say("ERROR: " + message)
end
#
# quit with a message that we are bailing out.
#
def bail!(message="")
say(message)
say("Bailing out.")
raise SystemExit.new
#ENV['GLI_DEBUG'] = "false"
#exit_now!(message)
end
#
# quit with no message
#
def quit!(message='')
say(message)
raise SystemExit.new
end
#
# bails out with message if assertion is false.
#
def assert!(boolean, message)
bail!(message) unless boolean
end
#
# assert that the command is available
#
def assert_bin!(cmd_name)
assert! `which #{cmd_name}`.strip.any?, "Sorry, bailing out, the command '%s' is not installed." % cmd_name
end
#
# assert that the command is run without an error.
# if successful, return output.
#
def assert_run!(cmd, message)
log2(" * run: #{cmd}")
cmd = cmd + " 2>&1"
output = `#{cmd}`
assert!($?.success?, message)
return output
end
##
## FILES AND DIRECTORIES
##
def relative_path(path)
path.sub(/^#{Regexp.escape(Path.provider)}\//,'')
end
def progress_created(path)
progress 'created %s' % relative_path(path)
end
def progress_updated(path)
progress 'updated %s' % relative_path(path)
end
def progress_nochange(path)
progress2 'no change %s' % relative_path(path)
end
def progress_removed(path)
progress 'removed %s' % relative_path(path)
end
#
# creates a directory if it doesn't already exist
#
def ensure_dir(dir)
unless File.directory?(dir)
if File.exists?(dir)
bail! 'Unable to create directory "%s", file already exists.' % dir
else
FileUtils.mkdir_p(dir)
unless dir =~ /\/$/
dir = dir + '/'
end
progress_created dir
end
end
end
NAMED_PATHS = {
:user_ssh => 'users/#{arg}/#{arg}_ssh.pub',
:user_pgp => 'users/#{arg}/#{arg}_pgp.pub',
:hiera => 'hiera/#{arg}.yaml',
:node_ssh_pub_key => 'files/nodes/#{arg}/#{arg}_ssh_key.pub',
:known_hosts => 'files/ssh/known_hosts',
:authorized_keys => 'files/ssh/authorized_keys'
}
def read_file!(*args)
begin
try_to_read_file!(*args)
rescue FileMissing => exc
bail!("File '%s' does not exist." % exc.file_path)
end
end
def read_file(*args)
begin
try_to_read_file!(*args)
rescue FileMissing => exc
return nil
end
end
#
# Three ways to call:
#
# - write_file!(file_path, file_contents)
# - write_file!(named_path, file_contents)
# - write_file!(named_path, file_contents, argument) -- deprecated
# - write_file!([named_path, argument], file_contents)
#
#
def write_file!(*args)
if args.first.is_a? Symbol
write_named_file!(*args)
elsif args.first.is_a? Array
write_named_file!(args.first[0], args.last, args.first[1])
else
write_to_path!(*args)
end
end
def remove_file!(file_path)
if File.exists?(file_path)
File.unlink(file_path)
progress_removed(file_path)
end
end
#
# saves a named file.
#
def write_named_file!(name, contents, arg=nil)
fullpath = named_path(name, arg)
write_to_path!(fullpath, contents)
end
def named_path(name, arg=nil)
assert!(NAMED_PATHS[name], "Error, I don't know the path for :#{name} (with argument '#{arg}')")
filename = eval('"' + NAMED_PATHS[name] + '"')
fullpath = Path.provider + '/' + filename
end
def write_to_path!(filepath, contents)
ensure_dir File.dirname(filepath)
existed = File.exists?(filepath)
if existed
if file_content_is?(filepath, contents)
progress_nochange filepath
return
end
end
File.open(filepath, 'w') do |f|
f.write contents
end
if existed
progress_updated filepath
else
progress_created filepath
end
end
private
def file_content_is?(filepath, contents)
output = `md5sum '#{filepath}'`.strip
if $?.to_i == 0
return output.split(" ").first == MD5.md5(contents).to_s
else
return false
end
end
#
# trys to read a file, raise exception if the file doesn't exist.
#
def try_to_read_file!(*args)
if args.first.is_a? Symbol
file_path = named_path(args.first)
elsif args.first.is_a? Array
file_path = named_path(*args.first)
else
file_path = args.first
end
if !File.exists?(file_path)
raise FileMissing.new(file_path)
else
File.read(file_path)
end
end
end
end
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