bash-completion: rework startable/restartable units once more

I tried to use 'systemctl --all list-units' to filter unit files, but
this always filters out unit files which are not loaded. We want to complete
systemctl start with those units too, so this approach is not going to work.

New version is rather slow, but hopefully correct.

1 files changed, 14 insertions, 13 deletions

diff --git a/shell-completion/bash/systemctl.in b/shell-completion/bash/systemctl.in
index 1c44a8df0..9e538a9a5 100644
--- a/shell-completion/bash/systemctl.in
+++ b/shell-completion/bash/systemctl.in
@@ -52,20 +52,23 @@ __filter_units_by_property () {
 }
 
 __get_all_units      () { { __systemctl $1 list-unit-files; __systemctl $1 list-units --all; } \
-        | { while read -r a b; do echo " $a"; done; }; }
+        | { while read -r a b; do [[ $a =~ @\. ]] || echo " $a"; done; }; }
 __get_template_names () { __systemctl $1 list-unit-files \
         | { while read -r a b; do [[ $a =~ @\. ]] && echo " ${a%%@.*}@"; done; }; }
 
 __get_active_units   () { __systemctl $1 list-units       \
         | { while read -r a b; do echo " $a"; done; }; }
 __get_startable_units () {
-        # find inactive or failed units, filter out masked and not-found
-        __systemctl $1 list-units --state inactive,failed -- $( __get_all_units ) | \
-                { while read -r a b c d; do [[ $b == "loaded" ]] && echo " $a"; done; }; }
+        # find startable inactive units
+        __filter_units_by_property $mode LoadState loaded $(
+            __filter_units_by_property $mode ActiveState inactive $(
+                __filter_units_by_property $mode CanStart yes $( __get_all_units )))
+}
 __get_restartable_units () {
-        # find !masked, filter out masked and not-found
-        __systemctl $1 list-units --state active,inactive,failed -- $( __get_all_units ) | \
-                { while read -r a b c d; do [[ $b == "loaded" ]] && echo " $a"; done; }; }
+        # filter out masked and not-found
+        __filter_units_by_property $mode LoadState loaded $(
+            __filter_units_by_property $mode CanStart yes $( __get_all_units ))
+}
 __get_failed_units   () { __systemctl $1 list-units       \
         | { while read -r a b c d; do [[ $c == "failed"   ]] && echo " $a"; done; }; }
 __get_enabled_units  () { __systemctl $1 list-unit-files  \
@@ -186,15 +189,13 @@ _systemctl () {
                 compopt -o filenames
 
         elif __contains_word "$verb" ${VERBS[STARTABLE_UNITS]}; then
-                comps=$( __filter_units_by_property $mode CanStart yes \
-                        $( __get_startable_units $mode);
-                        __get_template_names $mode)
+                comps=$( __get_startable_units $mode;
+                         __get_template_names $mode)
                 compopt -o filenames
 
         elif __contains_word "$verb" ${VERBS[RESTARTABLE_UNITS]}; then
-                comps=$( __filter_units_by_property $mode CanStart yes \
-                        $( __get_restartable_units $mode); \
-                        __get_template_names $mode)
+                comps=$( __get_restartable_units $mode;
+                         __get_template_names $mode)
                 compopt -o filenames
 
         elif __contains_word "$verb" ${VERBS[STOPPABLE_UNITS]}; then