Re: [9fans] tip o' the day

[Russ Cox <russcox@gmail.com>]

> fn gn { grep -n $* /dev/null }
>         Grep, but force listing of filename:lineno so you
>         can click on an entry to jump to it in an editor.
>
> fn g { grep -n $* *.[chsyl] /dev/null }
>         gn on all sources in the current directory

rob and i use this as /bin/g.  it handles both of these:

% cat /bin/g
#!/bin/rc

flags=()
while(! ~ $#* 1 && ~ $1 -* && ! ~ $1 --){
	flags=($flags $1);
	shift
}
if(~ $1 --)
	shift

switch($#*){
case 0
	echo 'usage: g [flags] pattern [files]' >[1=2]
	exit usage
case 1
	pattern=$1
	files=(`{ls *.[bcChm] *.cc *.py *.tex *.ms *.java >[2]/dev/null})
case *
	pattern=$1
	shift
	files=($*)
}
grep -n $flags -- $pattern $files /dev/null
%

> (how about a plumber command that ran grep -n on the files
> in the current directory and the include directory?  Then
> you could plumb words to it in acme with mouse chording to
> quickly crossreference keywords in the src tree.  I tried
> goofing with that once but failed pretty miserably).

i don't see why you'd involve the plumber.  just write
a script.

i find i almost never want to grep both local files and
/sys/include.  i either run g or sig.

% sig memmove
	void* memmove(void *s1, void *s2, long n)
%

russ