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added support for command execution

master
BodgeMaster 2020-04-08 02:06:32 +02:00
parent 723d082116
commit e2d684fff3
1 changed files with 36 additions and 6 deletions
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42
variable_grabbler.py
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@ -1,14 +1,32 @@
#!/usr/bin/python2 #!/usr/bin/python2
print """ print """
Variable Grabbler - version 3.3 Variable Grabbler - version 3.4
-------------------------------""" -------------------------------"""
################################################################
# Changes in this version:
#===============================================================
# * added support for command execution
# * some internal technicalities that should not impact features
# * Yes.
#
################################################################
# Exit codes:
#===============================================================
# 0 => normal exit
# 1 => argument error
# 2 => error while processing
#
# definitions # definitions
import os, json, sys import os, json, sys, subprocess
def print_err(text):
print >> sys.stderr, text
if not len(sys.argv)==3: if not len(sys.argv)==3:
print >> sys.stderr, "Error: Exactly two arguments required: \"python variable_grabbler.py <file to be rewritten> <config file>\"" print_err("Error: Exactly two arguments required: \"python variable_grabbler.py <file to be rewritten> <config file>\"")
sys.exit(1) sys.exit(1)
print "Reading config file...", print "Reading config file...",
@ -30,9 +48,21 @@ for variable in config_values:
file_replacement.close() file_replacement.close()
elif config_values[variable][0] == "exec": elif config_values[variable][0] == "exec":
print "Found array. Executing command instead: " + config_values[variable][1] print "Found array. Executing command instead: " + config_values[variable][1]
#Add code to replace variable with command output here process = subprocess.Popen(config_values[variable][1], shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
print >> sys.stderr, "Error: This option is not yet supported." stdout, stderr = process.communicate()
replacement = "" 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: else:
replacement = config_values[variable] replacement = config_values[variable]
print repr(replacement) print repr(replacement)