threadr.lostcave.ddnss.de/variable_grabbler.py

88 lines
3.2 KiB
Python

#!/usr/bin/python2
print """
Variable Grabbler - version 4.0_pre1
------------------------------------"""
################################################################
# Changes in this version:
#===============================================================
# *"\?" in a variable will now be replaced with a simple ?
# before processing, remember to double escape that because
# json (=> \\?)
# *commands are now not run over and over again if not needed
#
################################################################
# Exit codes:
#===============================================================
# 0 => normal exit
# 1 => argument error
# 2 => error while processing
#
# definitions
import os, json, sys, subprocess
def print_err(text):
print >> sys.stderr, text
if not len(sys.argv)==3:
print_err("Error: Exactly two arguments required: \"python variable_grabbler.py <file to be rewritten> <config file>\"")
sys.exit(1)
print "Reading config file...",
config_file = open(sys.argv[2],"r")
config_values = json.loads(config_file.read().decode("utf-8"))
config_file.close()
print "Done."
print "Working on file: "+sys.argv[1]
for variable in config_values:
print "> "+variable.upper()+" => ",
file_in = open(sys.argv[1], "r")
file_content = file_in.read()
file_in.close()
if config_values[variable][0] == "file":
print "Found array. Adding file instead: " + config_values[variable][1]
file_replacement = open(config_values[variable][1], "r")
replacement = file_replacement.read()
file_replacement.close()
elif config_values[variable][0] == "exec":
print "Found array. Executing command instead: " + config_values[variable][1]
if variable.upper() in file_content:
process = subprocess.Popen(config_values[variable][1], shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
stdout, stderr = process.communicate()
if process.returncode == 0:
print "Process exited normally. Replacing variable with the output from STDOUT..."
print_err("Subprocess exited normally.\nThe following error messages were produced:")
print_err(stderr)
replacement = stdout
else:
print "Process exited abnormally. Exiting. No changes will be made."
print_err("Subprocess exited abnormally. Exiting.\nThe following output was produced:")
print_err(stdout)
print_err("The following error messages were produced:")
print_err(stderr)
print "Exiting now."
sys.exit(2)
else:
print variable.upper(),
print "was not found in the file. Skipping command execution."
else:
replacement = repr(config_values[variable])
print repr(replacement)
# look for variable sections that contain question marks
argument_positions = []
i = 0
while i<len(replacement):
if replacement[i] == '?' and (i==0 or not replacement[i-1]=='\\'):
argument_positions = argument_positions + [ i ]
i = i+1
print "DEBUG: " + argument_positions
replacement = replacement.replace("\\?", "?")
file_out = open(sys.argv[1], "w")
file_out.write(file_content.decode('utf-8').replace("%" + variable.upper() + "%", replacement).encode('utf-8'))
file_out.close()
print "Done."