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|
require 'digest/md5'
module LeapCli
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="")
puts(message)
puts("Bailing out.")
raise SystemExit.new
#ENV['GLI_DEBUG'] = "false"
#exit_now!(message)
end
#
# quit with no message
#
def quit!(message='')
puts(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=nil)
cmd = cmd + " 2>&1"
output = `#{cmd}`
unless $?.success?
log1(" * run: #{cmd}")
log1(" * FAILED: (exit #{$?}) #{output}")
else
log2(" * run: #{cmd}")
end
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
##
## FILE READING, WRITING, DELETING, and MOVING
##
#
# All file read and write methods support using named paths in the place of an actual file path.
#
# To call using a named path, use a symbol in the place of filepath, like so:
#
# read_file(:known_hosts)
#
# In some cases, the named path will take an argument. In this case, set the filepath to be an array:
#
# write_file!([:user_ssh, 'bob'], ssh_key_str)
#
# To resolve a named path, use the shortcut helper 'path()'
#
# path([:user_ssh, 'bob']) ==> files/users/bob/bob_ssh_pub.key
#
def read_file!(filepath)
filepath = Path.named_path(filepath)
if !File.exists?(filepath)
bail!("File '%s' does not exist." % filepath)
else
File.read(filepath)
end
end
def read_file(filepath)
filepath = Path.named_path(filepath)
if !File.exists?(filepath)
nil
else
File.read(filepath)
end
end
def remove_file!(filepath)
filepath = Path.named_path(filepath)
if File.exists?(filepath)
File.unlink(filepath)
progress_removed(filepath)
end
end
def write_file!(filepath, contents)
filepath = Path.named_path(filepath)
ensure_dir File.dirname(filepath)
existed = File.exists?(filepath)
if existed
if file_content_equals?(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
#def rename_file(filepath)
#end
#private
##
## PRIVATE HELPER METHODS
##
#
# compares md5 fingerprints to see if the contents of a file match the string we have in memory
#
def file_content_equals?(filepath, contents)
filepath = Path.named_path(filepath)
output = `md5sum '#{filepath}'`.strip
if $?.to_i == 0
return output.split(" ").first == Digest::MD5.hexdigest(contents).to_s
else
return false
end
end
end
end
|
