From: Friedrich Dominicus <frido@q-software-solutions.com>
Subject: Re: A very simple question on SED or AWK for a GURU, possibly a lisp script or emacs batch processing of many files
Date: 14 Jan 2003 08:13:56 +0100 [thread overview]
Message-ID: <874r8ckxu3.fsf@fbigm.here> (raw)
In-Reply-To: b00bb831.0301131603.34e9704c@posting.google.com
gnuist006@hotmail.com (gnuist006) writes:
> Here is the type of lines I have in a file:
>
> junk label="junk1/junk2/junk3/.../junkn/" more junk
>
> I want to find every line that has
>
> label="..."
>
> pattern
>
> and then I want to replace every / by _ inside the
> quotes.
>
> For the purposes of continuity, I want the script to look like this:
>
> cat file |
> sed commands |
> awk commands |
you do not nead cat for just one file.
>
> etc.
>
> I do not care if it all sed or awk or in what order.
Well you posted to c.l.lisp here's a Lisp solutoin for one file. It is
left to you to expand to more files (which is not too difficult)
(defun q-2003-01-14 (in-file)
(let ((out-file (concatenate 'string (subseq in-file 0
(position #\. in-file :from-end t)) ".out")))
(with-open-file (out out-file :direction :output
:if-does-not-exist :create
:if-exists :supersede)
(clawk:for-file-lines (in-file)
(when (clawk:match clawk:$0 "label=\"\(.*)\"")
(let* ((submatch (aref clawk:*regs* 1))
(substr (subseq clawk:$0 (car submatch) (cdr submatch))))
(replace clawk:$0
(pregexp-replace* "/" substr "_")
:start1 (car submatch)
:end1 (cdr submatch))))
(princ clawk:$0 out)
(terpri out)
(values)))))
With this file
junk label="junk1/junk2/junk3/junk4" other stuff
other junk label="j1/j2/j3" other stuff and much more
nothing
label="/t1/t2/t3"
I got this result
junk label="junk1_junk2_junk3_junk4" other stuff
other junk label="j1_j2_j3" other stuff and much more
nothing
label="_t1_t2_t3"
Quite nice scripting with Common Lisp IMHO :)
Regards
Friedrich
next prev parent reply other threads:[~2003-01-14 7:13 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-14 0:03 A very simple question on SED or AWK for a GURU, possibly a lisp script or emacs batch processing of many files gnuist006
2003-01-14 3:46 ` Christopher J. White
2003-01-14 7:13 ` Friedrich Dominicus [this message]
2003-01-14 8:42 ` gnuist006
2003-01-14 10:23 ` Friedrich Dominicus
2003-01-14 22:10 ` Wayne Throop
2003-01-14 18:18 ` ericjb
2003-01-14 19:34 ` Stefan Monnier <foo@acm.com>
2003-01-14 22:54 ` Alan Mackenzie
2003-01-14 23:19 ` Kaz Kylheku
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