v1.2.2: fix more interactivity hangups

Author: makesourcenotcode

README.name-safe-in-bash-help-information

@@ -1,6 +1,6 @@
 === SUMMARY ===
 
-version: 1.2.1 | home: https://github.com/makesourcenotcode/name-safe-in-bash
+version: 1.2.2 | home: https://github.com/makesourcenotcode/name-safe-in-bash
 
 Help choosing Bash alias and function names that WON'T come back to bite you
 later!
@@ -71,6 +71,7 @@ may be spun up as another project.
 
 === CHANGELOG ===
 
+v1.2.2: fix more interactivity hangups
 v1.2.1: minor documentation fix
 v1.2.0: fix package manager interactivity hangups
 v1.1.2: minor documentation improvement

name-safe-in-bash

@@ -15,14 +15,22 @@ output_commands_found_in_path(){
   for directory in `echo $PATH | sed 's/:/ /g'`; do
     ls -A $directory 2>/dev/null; done;}
 
+assert_command_exists(){ type "$1" >/dev/null 2>&1;}
+
 output_name_if_known_to_dnf(){
-  dnf --assumeno provides "$1" >/dev/null 2>&1 && echo "$1";}
+  assert_command_exists dnf &&
+  dnf --assumeno provides "$1" >/dev/null 2>&1 &&
+  echo "$1";}
 
 output_name_if_known_to_yum(){
-  yum --assumeno provides "$1" >/dev/null 2>&1 && echo "$1";}
+  assert_command_exists yum &&
+  yum --assumeno provides "$1" >/dev/null 2>&1 &&
+  echo "$1";}
 
 output_name_if_known_to_zypper(){
-  zypper --non-interactive what-provides "$1" >/dev/null 2>&1 && echo "$1";}
+  assert_command_exists zypper &&
+  zypper --non-interactive what-provides "$1" >/dev/null 2>&1 &&
+  echo "$1";}
 
 output_names_for_edit_distance_comparision() {
   local -r proposed_name="$1"