8

At the moment I'm using two commands, I'm sure there must be a better way...

wim@wim-acer:~/ffmpeg$ find . -name "*.h" -print0 | xargs -0 grep -i invalid\ preset
wim@wim-acer:~/ffmpeg$ find . -name "*.c" -print0 | xargs -0 grep -i invalid\ preset
  • 1
    does -name '*.[ch]' work? – glenn jackman Aug 25 '11 at 14:40
10

ack (or, on Debian/Ubuntu, ack-grep) will ignore non-source files like version control or binaries. Very useful.

to search just .c and .h files, as above:

ack-grep -i --cc "invalid preset"

the --cc (the longer form is --type cc) only looks at .c .h & .xs files. The full list of filetypes is viewable with ack-grep --help type. Most of the time, you won't particularly need the --type, as it will generally only have the files to search, and then files you won't see by default, like binaries, backups and version control files.

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5

The grep program itself can search recursively and also accepts an option to search only certain files. The following is equivalent to your two find commands.

grep -Ri --include=*.[ch] invalid\ preset .
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  • This worked for me when I got rid of the brackets – Mike Oct 31 '15 at 22:48
1

The find command can call grep itself.

find . \( -name "*.c" -o -name "*.h" \) -exec grep -i "invalid preset" {} \; -print

and variations of thereof.

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  • Changed it to the obvious variation. ;-) – Keith Aug 25 '11 at 8:35
0

I can add something like this to your ~/.bashrc

alias cppgrep='grep -Ri "--include=*.[hc]" "--include=*.cpp" "--include=*.hpp"'
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