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Contents
require "digest"
# 1. md5sum the file or zipfile - shared
# 2. add prefix and md5sum - shared, lets break out prefix adding logic to elsewhere
# Using md5sum on the zipped file will an always changing value since the timestamp and other metadata of the zipfile
# changes whenever we create it.
#
# This is custom checksum logic that only accounts for the contents of the files in the directory.
module Lono
class Md5
class << self
extend Memoist
# This checksum within the file name is to mainly make sure that Lambda::Function resources "change" and an update is triggered.
# There's another checksum in the upload code that makes sure we don't upload the code again to speed up things.
def sum(path)
files = Dir["#{path}/**/*"]
files = files.reject { |f| File.directory?(f) }
.reject { |f| File.symlink?(f) }
files.sort!
content = files.map do |f|
Digest::MD5.file(f).to_s[0..7]
end.join
md5 = Digest::MD5.new
md5.update(content)
md5.hexdigest.to_s[0..7]
end
memoize :sum
def name(path)
relative_path = name_without_md5(path)
relative_path = relative_path.sub(/\.(\w+)$/,'') # strip extension
ext = File.directory?(path) ? "zip" : $1
md5 = sum(path)
"#{relative_path}-#{md5}.#{ext}"
end
def name_without_md5(path)
regexp = %r{.*/output/[\w_-]+/files/}
path.sub(regexp, '') # relative_path w/o md5
end
end
end
end
Version data entries
28 entries across 28 versions & 1 rubygems