Add bash 4+ version check to pack plugin

plugins/available/history-eternal.plugin.bash

@@ -3,7 +3,9 @@ about-plugin 'eternal bash history'
 
 if [[ ${BASH_VERSINFO[0]} -lt 4 ]] || [[ ${BASH_VERSINFO[0]} -eq 4 && ${BASH_VERSINFO[1]} -lt 3 ]]; then
 	_log_warning "Bash version 4.3 introduced the 'unlimited' history size capability."
-	return 1
+	_log_warning "Disabling history-eternal plugin (current version: $BASH_VERSION)"
+	_disable-plugin history-eternal
+	return 0
 fi
 
 # Modify history sizes before changing location to avoid unintentionally

plugins/available/pack.plugin.bash

@@ -1,6 +1,13 @@
 # shellcheck shell=bash
 # bash completion for pack                                 -*- shell-script -*-
 
+# Requires bash 3.3+ for associative arrays
+# Skip loading if bash version is too old
+if [[ -n "${BASH_VERSINFO[0]}" ]] && [[ "${BASH_VERSINFO[0]}" -eq 3 ]] && [[ "${BASH_VERSINFO[1]}" -lt 3 ]]; then
+	_disable-plugin pack
+	return 0
+fi
+
 cite about-plugin
 about-plugin 'CNB pack cli aliases'
 

plugins/available/percol.plugin.bash

@@ -17,8 +17,9 @@ _command_exists percol || return
 
 if [[ ${BASH_VERSINFO[0]} -lt 4 ]]; then
 	_log_warning "You have to upgrade Bash to Bash v4.x to use the 'percol' plugin."
-	_log_warning "Your current Bash version is $BASH_VERSION."
-	return
+	_log_warning "Disabling percol plugin (current version: $BASH_VERSION)"
+	_disable-plugin percol
+	return 0
 fi
 
 function _replace_by_history() {