From: Andre Noll <maan@systemlinux.org>
Date: Tue, 29 Nov 2011 22:28:51 +0000 (+0100)
Subject: gsu subcommand: Add gsu_get_unnamed_arg_num().
X-Git-Url: http://git.tuebingen.mpg.de/?p=gsu.git;a=commitdiff_plain;h=b8baa7b1efbed81a527f589d3f917f7b518b856a

gsu subcommand: Add gsu_get_unnamed_arg_num().

This will be handy for many gsu applications.
---

diff --git a/misc/gsu/subcommand b/misc/gsu/subcommand
index 84c0174..5ccb3fc 100644
--- a/misc/gsu/subcommand
+++ b/misc/gsu/subcommand
@@ -469,6 +469,47 @@ gsu_cword_is_option_parameter()
 	ret=0
 }
 
+# Get the word number on which the cursor is, not counting options.
+#
+# This is useful for completing commands whose possible completions depend
+# on the word number, for example mount.
+#
+# $1:   Getopt option string.
+# $2:   The current word number.
+# $3..: All words of the current command line.
+#
+# return: If the current word is an option, or a parameter to an option,
+# this function sets $result to -1. Otherwise, the number of the non-option
+# is returned in $result.
+#
+gsu_get_unnamed_arg_num()
+{
+	local opts="$1" cword="$2" prev cur
+	local -i i n=0
+	local -a words
+
+	shift 2
+	words=("$@")
+	cur="${words[$cword]}"
+	prev="${words[$(($cword - 1))]}"
+	result=-1
+	[[ "$cur" == -* ]] && return
+	[[ "$prev" == -* ]] && [[ "$opts" == *${prev#-}:* ]] && return
+
+	for ((i=1; i <= $cword; i++)); do
+		prev="${words[$(($i - 1))]}"
+		cur="${words[$i]}"
+		[[ "$cur" == -* ]] && continue
+		if [[ "$prev" == -* ]]; then
+			opt=${prev#-}
+			[[ "$opts" != *$opt:* ]] && let n++
+			continue
+		fi
+		let n++
+	done
+	result="$(($n - 1))"
+}
+
 gsu()
 {
 	local i