Guard tput calls for errors from CI (#827)

omnibus/package-scripts/firezone/postinst

@@ -32,9 +32,18 @@ if [ -e ${DEST_DIR}/embedded/bin/symlink_ctl_cmds ]; then
     ${DEST_DIR}/embedded/bin/symlink_ctl_cmds
 fi
 
-bold=$(tput bold)
-reset=$(tput sgr0)
+if tput bold; then
+  bold=$(tput bold)
+else
+  bold=''
+fi
+if tput sgr0; then
+  normal=$(tput sgr0)
+else
+  normal=''
+fi
+
 echo $bold
 echo "Please see our upgrade guide for any version notes that apply:"
 echo "https://docs.firezone.dev/administer/upgrade"
-echo $reset
+echo $normal

omnibus/package-scripts/firezone/preinst

@@ -18,15 +18,24 @@ kernelCheck() {
 }
 
 configCheck() {
-    config_file='/etc/firezone/firezone.rb'
-    error_color=$(tput setaf 1) #red
-    reset_color=$(tput sgr0)
+  config_file='/etc/firezone/firezone.rb'
 
-    if test -f $config_file && grep -q "^\s*default\['firezone'\]\['authentication'\]\['\(google\|okta\)'\]\['enabled'\]\s*=\s*true" $config_file ; then
-        echo "${error_color}ERROR: Firezone 0.5+ disables support for pre-configured Okta and Google OAuth2 providers!${reset_color}"
-        echo "Please see our transition guide to move to a generic OIDC config: https://docs.firezone.dev/administer/upgrade#upgrading-from--050-to--050"
-        exit 1
-    fi
+  if tput setaf 1; then
+    error=$(tput setaf 1)
+  else
+    error=''
+  fi
+  if tput sgr0; then
+    normal=$(tput sgr0)
+  else
+    normal=''
+  fi
+
+  if test -f $config_file && grep -q "^\s*default\['firezone'\]\['authentication'\]\['\(google\|okta\)'\]\['enabled'\]\s*=\s*true" $config_file ; then
+    echo "${error}ERROR: Firezone 0.5+ disables support for pre-configured Okta and Google OAuth2 providers!${normal}"
+    echo "Please see our transition guide to move to a generic OIDC config: https://docs.firezone.dev/administer/upgrade#upgrading-from--050-to--050"
+    exit 1
+  fi
 }
 
 capture () {

scripts/uninstall.sh

@@ -43,11 +43,20 @@ rm -rf \
 
 echo 'Done! Firezone has been uninstalled.'
 
-bold=$(tput bold)
-normal=$(tput sgr0)
+if tput bold; then
+  bold=$(tput bold)
+else
+  bold=''
+fi
+if tput sgr0; then
+  normal=$(tput sgr0)
+else
+  normal=''
+fi
+
 echo $bold
 echo 'We rely on feedback from users to steer development.' \
-    'Would you mind taking a minute to share product feedback in exchange' \
-    'for some Firezone stickers?'
+  'Would you mind taking a minute to share product feedback in exchange' \
+  'for some Firezone stickers?'
 echo "https://firezone.dev/feedback#source=uninstall-script"
 echo $normal