On 10/23/2012 11:42 AM, Geert Uytterhoeven wrote:
> On Tue, Oct 23, 2012 at 8:27 PM, Thomas Petazzoni
> <thomas.petazz...@free-electrons.com> wrote:
>>>> find . -exec fgrep -H "$1" {} \;
>>>>
>>>> but with lots and lots of other qualifiers. You can see a usable
>>>> version at
>>>>
>>>> https://www.ridgerun.com/developer/wiki/index.php/Tip_of_the_day#finds_-_find_a_string_in_common_text_files
>>>
>>> This looks useful.
>>>
>>> I do something similar with the kernel. I have
>>> a small one-line wrapper called armcgrep, which greps only the files
>>> in the arch/arm section of the kernel source tree, and only those
>>> with filenames matching the pattern "*.[chS]". Once things
>>> are in the page cache, it works pretty fast.
>>>
>>> 'finds' looks similar, but it also omits some areas, and includes
>>> things like Kconfig and others. I need to mentally digest all
>>> the 'find' magic in it...
>>
>> Note also that you can use 'git grep', that will only grep the source
>> files that are under version control, skipping all object files and
>> other generated files you may have in your tree, if you're not doing
>> out of tree builds. I use 'git grep' routinely.
>
> Yeah. For Tim's use case:
>
> git grep <pattern> -- "arch/arm/*.[chS]"
Actually I mis-stated the case a bit. I'm searching the whole kernel
tree, but only including one architecture directory, arch/arm, in the search.
This is primarily to omit extraneous matches for other architectures (which I
might not be interested in at the moment). The way the kernel is written,
there are often arch-specific functions or structures that show up multiple
times if you don't filter down to one arch.
Here's my solution (armcgrep):
#!/bin/sh
find . -path "./.pc" -prune -o -name "*.[chS]" | xargs egrep "$1" | grep -v
arch/[^a] | grep -v arch/a[^r]
I know there must be a simpler way to filter out non-arm arches than with
two "grep -v"s (anyone??), but it works... :-)
I have to prune out .pc because I'm using quilt and would otherwise get a lot
of matches in that sub-directory.
-- Tim
=============================
Tim Bird
Architecture Group Chair, CE Workgroup of the Linux Foundation
Senior Staff Engineer, Sony Network Entertainment
=============================
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