62 lines
1.4 KiB
Python
Executable file
62 lines
1.4 KiB
Python
Executable file
#!/usr/bin/python3
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import sys, re
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# sanity check
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if len(sys.argv) < 3:
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print("usage: python3 editconf.py /etc/file.conf [-s] NAME=VAL [NAME=VAL ...]")
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sys.exit(1)
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# parse command line arguments
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filename = sys.argv[1]
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settings = sys.argv[2:]
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delimiter = "="
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delimiter_re = r"\s*=\s*"
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if settings[0] == "-s":
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settings.pop(0)
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delimiter = " "
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delimiter_re = r"\s+"
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# create the new config file in memory
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found = set()
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buf = ""
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for line in open(filename):
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for i in range(len(settings)):
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name, val = settings[i].split("=", 1)
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m = re.match("\s*" + re.escape(name) + delimiter_re + "(.*?)\s*$", line)
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if m:
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# If this is already the setting, do nothing.
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if m.group(1) == val:
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buf += line
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found.add(i)
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break
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# comment-out the existing line
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buf += "#" + line
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# if this option oddly appears more than once, don't add the setting again
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if i in found:
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break
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# add the new setting
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buf += name + delimiter + val + "\n"
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# note that we've applied this option
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found.add(i)
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break
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else:
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# If did not match any setting names, pass this line through.
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buf += line
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# Put any settings we didn't see at the end of the file.
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for i in range(len(settings)):
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if i not in found:
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name, val = settings[i].split("=", 1)
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buf += name + delimiter + val + "\n"
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# Write out the new file.
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with open(filename, "w") as f:
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f.write(buf)
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