bin/brew: don't set empty, unfiltered variables.

Otherwise we unconditionally set e.g. `CI`, `TRAVIS`.
2017-11-27 14:43:24 +00:00 · 2017-11-27 14:43:24 +00:00 · cd7049bb72
commit cd7049bb72
parent f262cbc531
1 changed files with 3 additions and 0 deletions
--- a/bin/brew
+++ b/bin/brew
@ -91,6 +91,9 @@ then
  for VAR in HOME SHELL PATH TERM LOGNAME USER CI TRAVIS \
             "${!HOMEBREW_@}" "${!TRAVIS_@}"
  do
+    # Skip if variable value is empty.
+    [[ -z "${!VAR}" ]] && continue
+
    FILTERED_ENV+=( "${VAR}=${!VAR}" )
  done