ci: specify COLUMNS as env to avoid inconsisten test result

.github/workflows/ci.yml

@@ -2,6 +2,9 @@ name: CI
 
 on: [push, pull_request]
 
+env:
+  COLUMNS: 80
+
 defaults:
   run:
     shell: bash

buildspec.yml

@@ -4,6 +4,8 @@ env:
   parameter-store:
     LOGIN_PASSWORD: /dotbare/dockerpassword
     LOGIN_USERNAME: /dotbare/dockerusername
+  exported-variables:
+    COLUMNS: 80
 
 phases:
   install:

helper/set_variable.sh

@@ -41,7 +41,8 @@ FZF_DEFAULT_OPTS="
   $DOTBARE_KEY
 "
 
-COLUMNS=$(stty size < /dev/tty | cut -d' ' -f2)
+[[ -z "${COLUMNS}" ]] \
+  && COLUMNS=$(stty size < /dev/tty | cut -d' ' -f2)
 [[ "${COLUMNS}" -lt 80 ]] \
   && FZF_DEFAULT_OPTS="$FZF_DEFAULT_OPTS --preview-window=hidden"