refactor: set pipefail conditionally

expand alias in bash

src/script.sh

@@ -1,14 +1,17 @@
 #!/bin/sh
 
-## dash does not support pipefail
-# this does not work in `dash script.sh`
-DASH=$(readlink -f "/bin/sh" | grep "dash" || [ $? = 1 ])
-if [ -n "$DASH" ]; then
+if ! (set -o pipefail 2>/dev/null); then
+  # dash does not support pipefail
   set -efx
 else
   set -efx -o pipefail
 fi
 
+# bash does not expand alias by default for non-interactive script
+if [ -n "$BASH_VERSION" ]; then
+  shopt -s expand_aliases
+fi
+
 alias curl="curl -L"
 alias mkdir="mkdir -p"
 alias rm="rm -rf"