I am running the command helm-do-grep and I notice that the search is not recursive, i.e. it searches only in the directory I specify and not in subdirectories. How do I direct helm-grep to automatically search recursively?
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incandescentman
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helm does offer a non-recursive and a recursive command, by default it's using the non-recursive one when invoking M-x helm-do-grep unless it has been called with a prefix argument. The values for the non-recursive and recursive command are stored in the helm-grep-default-command and helm-grep-default-recurse-command variables.
The easiest way of achieving recursion by default would be setting the former variable to the value of the latter.
(eval-after-load 'helm-grep
'(setq helm-grep-default-command helm-grep-default-recurse-command))
Caution: The solution above might have unintended consequences, such as using grep on the buffers list to recurse on every listed file.
wasamasa
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What's helm's recursive command? (I see helm-do-zgrep...) Would calling helm's recursive command be a safer way to invoke grep recursively than the above? – incandescentman Jan 19 '15 at 03:35
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You can inspect it with `F1 v helm-grep-default-recurse-command`. – wasamasa Jan 19 '15 at 08:42
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I get `grep -a -d recurse %e -n%cH -e %p %f`. What's the correct string for recursive searching? – incandescentman Jan 19 '15 at 21:10
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Well, you set `helm-grep-default-command` to this value by `(setq helm-grep-default-command "grep -a -d recurse %e -n%cH -e %p %f")`. – wasamasa Jan 19 '15 at 23:06
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But what's the new value for recursive search? – incandescentman Jan 20 '15 at 07:17
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Doesn't matter, just leave it that way. – wasamasa Jan 20 '15 at 09:29
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Evaluating the code in the answer makes it so that `helm-do-grep` doesn't run a search at all. – incandescentman Feb 20 '15 at 05:53
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I find that hard to believe as I cannot reproduce that with a recent installation of `helm` and `emacs -Q`. – wasamasa Feb 20 '15 at 09:03