I was looking at UML this morning. I wanted a Win32 port.
I downloaded the patch to the latest stable 2.4 kernel.
[ done while looking over the LINE 0.5 code (think Lin4Win :) ]
But I'll never get started with distractions like these...
... I wanted to look at said patch file in a non-linear fashion. :)
It contains diffs for a large number of files in the kernel tree, and I
wanted an overall picture, not the line-by-line view I was getting.
I wanted to extract those diffs into their proper tree, without patching.
... enter grep.
I could grep for all lines containing 'diff'. That would show me all
modified/added files, but looking up more detail was still tedious.
... enter a monster... :)
cat uml-patch-2_4_18-10 | {
while read LINE; do
set -- $LINE
if [ "$1" = "diff" ]; then
echo
while [ "$2" ]; do shift; done
FILE="$1.diff"
if [ -e $FILE ]; then
echo skipping $FILE
FILE=
else
echo creating $FILE
mkdirhier `dirname $FILE`
fi
fi
echo -n .
[ "$FILE" ] && echo "$LINE" >> $FILE
done
}
... enter bright idea
. o O (Maybe someone else wants to do this)
. o O (If I post it to slug, it'll pop up in the archive search...)
... footnote
I used set/shift to set the args and pick out the first/last words so bash
didn't have to spawn a subprocess. I normally would've used 'cut', but
doing it for every line slowed things down a lot.
... apologies
This was probably a waste of bandwidth.
There's probably a proper tool somewhere to do the job.
Yes, I'm sure scripting in ZSH could've done it better. :-P
-- Jessica Mayo.
(Everything with a Grin :)
--
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