Clean up shellcheck warnings

rowbot

@@ -78,6 +78,8 @@ if [[ $tls = yes ]]; then
     exit 1
   fi
 
+  # false positive
+  # shellcheck disable=SC2102
   if [[ -v opts[client-cert] ]]; then
     client_cert=${opts[client-cert]}
   fi
@@ -206,6 +208,8 @@ fi
 
 send() {
   local fmt
+  # As this is a printf wrapper, the format string is provided as an argument
+  # shellcheck disable=SC2059
   printf -v fmt "$1" "${@:2}"
   printf '%s\r\n' "$fmt" >&"$out_sock"
   debug "sending line: %s" "$fmt"
@@ -240,7 +244,7 @@ on_MODE() {
 }
 
 on_NICK() {
-  if [[ $from = $nick ]]; then
+  if [[ $from = "$nick" ]]; then
     nick=${params[0]}
   fi
 
@@ -316,7 +320,12 @@ on_005() {
   local param key value
 
   for param in "${params[@]:1:${#params[@]}-2}"; do
+    # This is a valid assignment, not a comparison
+    # shellcheck disable=SC1097
     IFS== read -r key value <<< "$param"
+    # While isupport is unused, it's still there in case later code wants to
+    # use it
+    # shellcheck disable=SC2034
     isupport[$key]=$value
     debug "isupport: %s = %s" "$key" "$value"
   done
@@ -373,7 +382,7 @@ on_353() {
 }
 
 on_354() {
-  if (( ${params[1]} == 42 )); then
+  if (( params[1] == 42 )); then
     debug "received the identifying who"
     ident=${params[2]} host=${params[3]}
     debug "ident=%s host=%s" "$ident" "$host"
@@ -583,7 +592,8 @@ hook_post_PRIVMSG_factoids() {
       local key=${words[0]:${#trigger}}
 
       if [[ -f $fact_root/${params[0]}/$key ]]; then
-        local msg=$(<"$fact_root"/"${params[0]}"/"$key")
+        local msg
+        msg=$(<"$fact_root"/"${params[0]}"/"$key")
 
         if (( ${#words[@]} > 1 )) && [[ ${words[1]} = \> ]]; then
           local target
@@ -599,7 +609,7 @@ hook_post_PRIVMSG_factoids() {
 
 hook_post_PRIVMSG_control_panel() {
   if [[ ${words[0]} = "$trigger"* ]]; then
-    if [[ $from != $owner && $dev != yes ]]; then
+    if [[ $from != "$owner" && $dev != yes ]]; then
       return 0
     fi
 
@@ -695,7 +705,7 @@ hook_post_433_alternick() {
 }
 
 hook_post_NICK_alternick() {
-  if [[ ${params[0]} = $desired_nick ]]; then
+  if [[ ${params[0]} = "$desired_nick" ]]; then
     keep_trying=no
     info "obtained nick %s" "$desired_nick"
   fi