[ndctl PATCH] ndctl: make completion smarter wrt mode/type/idle options

[Vishal Verma <vishal.l.verma@intel.com>]

Add three new 'filters' for mode, type, and idle.

'mode' and 'type' work with each other to prevent a blk namespace from
showing modes like 'dax' or 'memory', or if those modes are specified,
then limiting 'type' to 'pmem'.

Also show completions for --map= only if mode is 'memory'.

For idle filtering (typically relevant for 'ndctl list', only show idle
{namespaces, regions} in the completion id a --idle has been specified
on the command line so far. This makes sense because trying to list an
idle namespace without --idle (even if you know that is the one you
want) won't show any output withot --idle.

Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
---

Applies on top of the last bash-completion patch:
"ndctl: bash completion updates for the --namespace= filter"

 contrib/ndctl | 31 ++++++++++++++++++++++++++-----
 1 file changed, 26 insertions(+), 5 deletions(-)

diff --git a/contrib/ndctl b/contrib/ndctl
index b7a82fc..15ca3bf 100755
--- a/contrib/ndctl
+++ b/contrib/ndctl
@@ -110,6 +110,8 @@ __ndctl_get_regions()
 {
 	local opts="--regions $*"
 	[ -n "$bus_filter" ] && opts="$opts --bus=$bus_filter"
+	[ -n "$type_filter" ] && opts="$opts --type=$type_filter"
+	[ -n "$idle_filter" ] && opts="$opts --idle"
 	echo "$(ndctl list $opts | grep -E "^\s*\"dev\":" | cut -d\" -f4)"
 }
 
@@ -118,6 +120,8 @@ __ndctl_get_ns()
 	opts="--namespaces $*"
 	[ -n "$bus_filter" ] && opts="$opts --bus=$bus_filter"
 	[ -n "$reg_filter" ] && opts="$opts --bus=$reg_filter"
+	[ -n "$type_filter" ] && opts="$opts --type=$type_filter"
+	[ -n "$idle_filter" ] && opts="$opts --idle"
 	echo "$(ndctl list $opts | grep -E "^\s*\"dev\":" | cut -d\" -f4)"
 }
 
@@ -147,7 +151,7 @@ __ndctl_comp_options()
 			opts=$(__ndctl_get_dimms)
 			;;
 		--namespace)
-			opts=$(__ndctl_get_ns -i)
+			opts=$(__ndctl_get_ns)
 			;;
 		--reconfig)
 			# It is ok to reconfig disabled namespaces
@@ -155,12 +159,20 @@ __ndctl_comp_options()
 			;;
 		--type)
 			opts="pmem blk"
+			if [[ "$mode_filter" == @(dax|memory) ]]; then
+				opts="pmem"
+			fi
 			;;
 		--mode)
 			opts="raw sector memory dax"
+			if [[ "$type_filter" == "blk" ]]; then
+				opts="raw sector"
+			fi
 			;;
 		--map)
-			opts="mem dev"
+			if [[ "$mode_filter" == "memory" ]]; then
+				opts="mem dev"
+			fi
 			;;
 		*)
 			return
@@ -224,13 +236,13 @@ __ndctl_prev_skip_opts ()
 	done
 }
 
-bus_filter=''
-reg_filter=''
-
 __ndctl_init_filters()
 {
 	bus_filter=''
 	reg_filter=''
+	type_filter=''
+	idle_filter=''
+	mode_filter=''
 
 	for __word in "${words[@]}"; do
 		if [[ "$__word" =~ --bus=(.*) ]]; then
@@ -245,6 +257,15 @@ __ndctl_init_filters()
 			local regions=$(__ndctl_get_regions -i)
 			[[ "$regions" == *"$reg_filter"* ]] || reg_filter=''
 		fi
+		if [[ "$__word" =~ --idle ]]; then
+			idle_filter="1"
+		fi
+		if [[ "$__word" =~ --type=(.*) ]]; then
+			type_filter="${BASH_REMATCH[1]}"
+		fi
+		if [[ "$__word" =~ --mode=(.*) ]]; then
+			mode_filter="${BASH_REMATCH[1]}"
+		fi
 	done
 }
 
-- 
2.5.5

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