build: use uname instead of relying on sed --version (#28900)

PR Close #28900

integration/bazel/pretest.sh

@@ -1,7 +1,20 @@
-# sedi makes sed work on both OSX & Linux
+#!/usr/bin/env bash
+
+set -eux -o pipefail
+# -e: exits if a command fails
+# -u: errors if an variable is referenced before being set
+# -x: shows the commands that get run
+# -o pipefail: causes a pipeline to produce a failure return code if any command errors
+
+# sedi makes `sed -i` work on both OSX & Linux
 # See https://stackoverflow.com/questions/2320564/i-need-my-sed-i-command-for-in-place-editing-to-work-with-both-gnu-sed-and-bsd
 sedi () {
-    sed --version >/dev/null 2>&1 && sed -i -- "$@" || sed -i "" "$@"
+  case $(uname) in
+    Darwin*) sedi=('-i' '') ;;
+    *) sedi='-i' ;;
+  esac
+
+  sed "${sedi[@]}" "$@"
 }
 
 sedi "s#packages-dist:#file://$PWD/../../dist/packages-dist/#" src/package.json