Search & Replace with RegEx

[tchurm]

Hi Pythonistas,

Here's my problem: I'm using a version of MOOX Firefox
(http://moox.ws/tech/mozilla/) that's been modified to run completely
from a USB Stick. It works fine, except when I install or uninstall an
extension, in which case I then have to physically edit the compreg.dat
file in my profile directory, replacing all instances of Absolute Path
links to relative ones. (And, yes, I have filed a Bugzilla report.)

For example, after installing a new extension, I change in compreg.dat

lines such as:

abs:J:\Firefox\ Firefox_Data\Pr ofiles\default. uyw\extensions\ {0538E3E3-7E9B-4d49-8831-A227C80A7AD3}\c omponents\nsFor ecastfox.js,111 1185900000
abs:J:\Firefox\ Firefox_Data\Pr ofiles\default. uyw\extensions\ {c4dc572a-3295-40eb-b30f-b54aa4cdc4b7}\c omponents\wml-service.js,1114 705020000

to:

rel:nsForecastf ox.js,111118590 0000
rel:wml-service.js,1114 705020000

I started a Python script that searches compreg.dat and finds all the
lines that I need to edit. I just need some help using RegEx to search
and replace these lines (as in the examples above), so that I no longer
need to edit compreg.dat manually.

Here's the script that I started:

############### ############### ############### ###

import os
import re
import fileinput

theRegEx = '.*abs:.*\.*.js .*'

p = re.compile(theR egEx, re.IGNORECASE)

fileToSearch = 'compreg.dat'
print "File to perfrom search-and-replace on: " + fileToSearch
print "Using Regex: " + theRegEx
print ""

if os.path.isfile( fileToSearch ):
tempFile = open( fileToSearch, 'r' )

for line in fileinput.input ( fileToSearch ):
if (p.match(line)! =None):
print line

tempFile.close( )

raw_input( '\n\nPress Enter to exit...' )

############### ############### ############### ###

I'd be very glad to get a helping hand here ;)

Thanks,

Tom

[George Sakkis]

<tc****@gmail.c om> wrote:

[snipped]

For example, after installing a new extension, I change in compreg.dat

lines such as:

abs:J:\Firefox\ Firefox_Data\Pr ofiles\default. uyw\extensions\ {0538E3E3-7E9B-4d49-8831-A227C80A7AD3}\c omponents\nsFor ecastfox.js,111 1185900000
abs:J:\Firefox\ Firefox_Data\Pr ofiles\default. uyw\extensions\ {c4dc572a-3295-40eb-b30f-b54aa4cdc4b7}\c omponents\wml-service.js,1114 705020000

to:

rel:nsForecastf ox.js,111118590 0000
rel:wml-service.js,1114 705020000

Try this:

import re
from fileinput import FileInput

regex = re.compile(r'^a bs:.*\\(.+)$')
input = FileInput(filen ame)
unparsed = []

for line in input:
try:
print regex.match(lin e).group(1)
except:
unparsed.append (input.fileline no())
print line

print "Unparsed lines:", ','.join(map(st r,unparsed))

George

[Thomas Guettler]

Am Tue, 12 Jul 2005 01:11:44 -0700 schrieb tc****@gmail.co m:

Hi Pythonistas,

Here's my problem: I'm using a version of MOOX Firefox
(http://moox.ws/tech/mozilla/) that's been modified to run completely
from a USB Stick. It works fine, except when I install or uninstall an
extension, in which case I then have to physically edit the compreg.dat
file in my profile directory, replacing all instances of Absolute Path
links to relative ones. (And, yes, I have filed a Bugzilla report.)

For example, after installing a new extension, I change in compreg.dat

lines such as:

abs:J:\Firefox\ Firefox_Data\Pr ofiles\default. uyw\extensions\ {0538E3E3-7E9B-4d49-8831-A227C80A7AD3}\c omponents\nsFor ecastfox.js,111 1185900000
abs:J:\Firefox\ Firefox_Data\Pr ofiles\default. uyw\extensions\ {c4dc572a-3295-40eb-b30f-b54aa4cdc4b7}\c omponents\wml-service.js,1114 705020000

to:

rel:nsForecastf ox.js,111118590 0000
rel:wml-service.js,1114 705020000

Hi,

some time ago I wrote "replace-recursive.py":

http://www.thomas-guettler.de/script...cursive.py.txt

Maybe this helps you,

Thomas

--
Thomas Güttler, http://www.thomas-guettler.de/

[tchurm]

thanks for the comments + help.

i think i got it working, although it's not pretty:

############### ###############
import os
import re

theRegEx = '.*abs:.*\.*.\\ \\'

p = re.compile(theR egEx, re.IGNORECASE)

fileToSearch = 'compreg.dat'
print "File to perform search-and-replace on: " + fileToSearch
print "Using Regex: " + theRegEx
print ""

#set this to an empty string
newdoc = ""

if os.path.isfile( fileToSearch ):
x = open(fileToSear ch, "r")
while 1:
line = x.readline()
if(p.match(line )!=None):
print ""
print line
newdoc = newdoc + re.sub("abs:.*\ .*.\\\\", "rel:", line)
else: newdoc = newdoc + line
if line == "":
print ""
print "finished !"
break

x.close()

if newdoc != '':
x = open(fileToSear ch, "w")
x.write(newdoc)
x.close()
print ""
print "file written!"
raw_input( '\n\nPress Enter to exit...' )
############### ###############