#!/usr/bin/python
# Wrapper for pkg-config that keeps track of the packages that were requested.

import garstowlib.config
import garstowlib.packages
import sys, os, re

def find_pc(p):
	for dir in os.getenv("PKG_CONFIG_PATH").split(":"):
		if dir != "":
			dir += "/"
		fn = dir + p + ".pc"
		try:
			os.stat(fn)
			return fn
		except OSError:
			pass
	return None

tty = open("/dev/tty", "w")

logname = os.getenv("FAKE_PKG_CONFIG_LOG")
if logname is None:
	tty.write("(fpc error: $FAKE_PKG_CONFIG_LOG not set)")
	sys.exit(1)

packages = {}
try:
	f = open(logname)
	for l in f.readlines():
		packages[l.strip()] = 1
	f.close()
except IOError:
	pass

if sys.argv[1] == "--fpc-dump" or sys.argv[1] == "--fpc-check":
	ps = packages.keys()
	ps.sort()
	used_pkgs = {}
	unknown_pcs = []
	pns = garstowlib.packages.get_package_names()
	for p in ps:
		pc = find_pc(p)
		if pc is None:
			unknown_pcs.append(p)
		else:
			pc = os.readlink(pc)
			pc = re.sub(r'.*/packages/([^/]+)/.*', r'\1', pc)
			used_pkgs[pc] = pns.get(pc, "unknown:" + pc)
	used_pkgs_full = used_pkgs.values()
	used_pkgs_full.sort()
	unknown_pcs.sort()
	if sys.argv[1] == "--fpc-dump":
		print "Needs pkg-config packages: %s" % " ".join(ps)
		print "Needs existing GARStow packages: %s" % " ".join(used_pkgs_full)
		print "Unknown pkg-config packages: %s" % " ".join(unknown_pcs)
	else:
		rc = 0
		packagename = sys.argv[2]
		this_port = garstowlib.packages.get_portfile(packagename)

		my_deps = set(garstowlib.packages.get_dependencies(packagename))
		ignore_deps = set(this_port.variable("IGNORE_PKGCONFIG_DEPS").split())

		missing = [(dep, garstowlib.config.select_dep_type(dep)) for dep in set(used_pkgs.keys()) - my_deps - ignore_deps]
		full_pn = pns[packagename]
		if missing != []:
			ps = {}
			for (dep, var) in missing:
				ps.setdefault(var, []).append(dep)
			portfile = garstowlib.packages.get_portfile(packagename)
			for (var, deps) in ps.items():
				print "Missing dependencies from %s: %s" % (full_pn, " ".join([used_pkgs[d] for d in deps]))
				rc = 1
		if unknown_pcs != []:
			print "Unknown dependencies in %s: %s" % (full_pn, " ".join(unknown_pcs))
		sys.exit(rc)
else:
	args = " ".join(sys.argv[1:]).split()
	while args != []:
		arg = args.pop(0)
		if arg[-1] == ",":
			arg = arg[:-1]
		if arg in (">=", "<=", ">", "<", "=", "!=", "--variable", "--atleast-pkgconfig-version", "--atleast-version", "--exact-version", "--max-version", "--define-variable"):
			args.pop(0)
		elif arg[0] == "-":
			continue
		else:
			tty.write("(fpc: " + arg + ")")
			packages[arg] = 1

	f = open(logname, "w")
	for p in packages.keys():
		print >>f, p
	f.close()

	tty.close()
	os.execvp("pkg-config", ["pkg-config"] + sys.argv[1:])
	sys.exit(20)