fattener.py

# fattener.py

import sys
import os
import envoy
import json

resolved = {}

def resolve_dependencies(gem_name):
	required_dependencies = []
	dependencies = envoy.run("gem dependency %s" % gem_name)
	if dependencies.status_code != 0:
		dependencies = envoy.run("gem dependency --remote %s" % gem_name)
	dep_output = dependencies.std_out.split('\n')
	for x in dep_output:
		if x.startswith("  "):
			dep_line = x.strip().split()
			dep_name = dep_line[0]
			required_dependencies.append(dep_name)
	resolved[gem_name] = required_dependencies
	return resolved

def flatten_dict_to_set(dict_deep):
	master = dict_deep.keys()
	subkeys = dict_deep.values()
	all_values = []
	all_values += master
	for keyset in subkeys:
		all_values += keyset
	return set(all_values)

def build_gem_to_deb(gem_name):
	r = envoy.run("fpm -s gem -t deb %s" % gem_name)
	print r.std_out

if __name__ == '__main__':
	starting_gem = sys.argv[1]
	try:
		with open("%s.json" % starting_gem, 'r') as infile:
			flattened_list = json.load(infile)
		for gem_to_build in flattened_list:
			build_gem_to_deb(gem_to_build)

	except:
		initial = resolve_dependencies(starting_gem)
		for gem in resolved[starting_gem]:
			print gem
			resolve_dependencies(gem)
		flattened_list = flatten_dict_to_set(resolved)
		with open("%s.json" % starting_gem, 'w') as outfile:
			json.dump(list(flattened_list),outfile)
		for gem_to_build in flattened_list:
			build_gem_to_deb(gem_to_build)