watch: New completion (Linux only for now).

completions/procps

@@ -73,6 +73,56 @@ _pwdx()
 } &&
 complete -F _pwdx pwdx
 
+[[ $UNAME == Linux ]] && have watch &&
+_watch()
+{
+    local cur prev words cword split
+    _init_completion -s || return
+
+    local offset=0 i
+    for (( i=1; i <= cword; i++ )); do
+        case ${words[i]} in
+            -h|--help|--version)
+                return
+                ;;
+            -n|--interval)
+                (( i++ ))
+                continue
+                ;;
+            -*)
+                continue
+                ;;
+        esac
+        offset=$i
+        break
+    done
+
+    if [[ $offset -gt 0 ]]; then
+        _command_offset $offset
+        return
+    fi
+
+    case $prev in
+        -d|--differences)
+            [[ $cur != -* ]] && \
+                COMPREPLY=( $( compgen -W 'cumulative' -- "$cur" ) )
+            return
+            ;;
+        -n|--interval)
+            return
+            ;;
+    esac
+
+    $split && return
+
+    if [[ $cur == -* ]]; then
+        COMPREPLY=( $( compgen -W '$( _parse_help "$1" )' -- "$cur" ) )
+        [[ $COMPREPLY == *= ]] && compopt -o nospace
+        return
+    fi
+} &&
+complete -F _watch watch
+
 # Local variables:
 # mode: shell-script
 # sh-basic-offset: 4

test/completion/watch.exp

@@ -0,0 +1 @@
+assert_source_completions watch

test/lib/completions/watch.exp

@@ -0,0 +1,18 @@
+proc setup {} {
+    save_env
+}
+
+
+proc teardown {} {
+    assert_env_unmodified
+}
+
+
+setup
+
+
+assert_complete_any "watch -"
+sync_after_int
+
+
+teardown