feat(cmdline): recursive :find, ripgrep :grep, quiet grep menu

- path+=** so :find searches subdirectories recursively
- grepprg/grepformat drive :grep through ripgrep (--vimgrep
  --smart-case), with a comment on the -./-uu/-uuu opt-in flags
- the auto-completion menu skips grep-family commands while their
  search-pattern argument is being typed, and dismisses any menu
  left over from completing the command name

1 files changed, 15 insertions, 0 deletions

diff --git a/plugin/50-autocompletion.lua b/plugin/50-autocompletion.lua
index a8b7f4b..1960871 100644
--- a/plugin/50-autocompletion.lua
+++ b/plugin/50-autocompletion.lua
@@ -48,7 +48,18 @@ local function c_accept_selection_or_dismiss()
 end
 
 -- Show the command-line completion menu automatically.
+-- Except for `:grep` commands (`:grep`, `:vimgrep`, their `add` and location-list variants).
 local function trigger_wildmenu()
+	if vim.fn.getcmdtype() == ":" then
+		-- A command word followed by a delimiter (space, `/`, …) means we are past it, into the args.
+		local cmd = vim.fn.getcmdline():match("^%s*(%a+)%A")
+		if cmd and vim.fn.fullcommand(cmd):find("grep", 1, true) then
+			if vim.fn.cmdcomplete_info().pum_visible == 1 then
+				vim.api.nvim_feedkeys(vim.keycode("<C-e>"), "n", false)
+			end
+			return
+		end
+	end
 	vim.fn.wildtrigger()
 end
 
@@ -74,6 +85,10 @@ vim.opt.wildoptions = { "exacttext", "pum", "tagfile", "fuzzy" }
 --[[ Completion modes triggered in order by `wildtrigger()` or `wildchar`: list matches without
 inserting (`noselect`), then list matches and insert the first full match (`full`). ]]
 vim.opt.wildmode = { "noselect", "full" }
+-- Search recursively under the current directory so `:find` matches files in any subdirectory.
+-- `:find` globs the tree synchronously with no timeout, so cap the depth (`**4`): the default `**`
+-- depth of 30 walks all of `$HOME` when run from there and hangs.
+vim.opt.path:append("**4")
 
 ----------------------------------------------------------------------------------------------------
 -- Autocommands ------------------------------------------------------------------------------------