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bug#516: [PATCH] Minor Enhancement for grep.el: auto-input thesymbol int


From: Drew Adams
Subject: bug#516: [PATCH] Minor Enhancement for grep.el: auto-input thesymbol into minibuffer command line.
Date: Sat, 5 Dec 2009 12:28:03 -0800

> >> > This patch is to let you input the cursor position symbol
> >> > automatically into minibuffer command line. I think it makes
> >> > us easier to use "grep-find" function.
> >>
> >> There is a function `grep-default-command' in grep.el that 
> >> does this. I wonder why it's used in `grep', but not in
> >> `grep-find'.  I think we should do the same in `grep-find'.
> >
> > Yes, and as I've suggested before, if the region is active,
> > then its contents, surrounded by "s, should be the default
> > search string. Example code:
> > http://www.emacswiki.org/emacs/grep%2b.el
> 
> `grep-tag-default' already provides the active region. But it uses
> `shell-quote-argument' instead of surrounding by quotes.  I don't know
> what is better, since it's harder to edit the command when
> `shell-quote-argument' puts a backslash before every space
> and some other characters.

Not only that, but:

a. You must use M-n to put it in the minibuffer. Not a big deal, but you must
know about this, to think to do that.

b. A default file-name pattern (e.g. "*.el") is also included, as part of what's
inserted.

All of that (especially the backslashing instead of quoting), makes it harder to
edit the text to match and the file names to match.

> Another drawback of `grep-tag-default' is that it provides only
> one alternative.  This is unlike `read-regexp' that proposes
> a list of possible default values.  So `grep-tag-default' could be
> improved to do the same.

FWIW, the code I use inserts the (quoted) region or the symbol name nearest
point (if no active region), and leaves out a file pattern. (You can still get
the vanilla default using `M-n'.)






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