More robust env.sh | Fix conda activate if in subshell

scripts/utils.sh

@@ -53,3 +53,27 @@ function restore_bash_options
 {
     set +vx; eval "$OLDSTATE"
 }
+
+#######################################
+# Wrapper around replace-content.py.
+# For a file ($1), write out text ($3) into it
+# replacing any area designated by $2.
+#######################################
+function replace_content
+{
+    # On macOS, use GNU readlink from 'coreutils' package in Homebrew/MacPorts
+    if [ "$(uname -s)" = "Darwin" ] ; then
+        READLINK=greadlink
+    else
+        READLINK=readlink
+    fi
+
+    # If BASH_SOURCE is undefined, we may be running under zsh, in that case
+    # provide a zsh-compatible alternative
+    DIR="$(dirname "$($READLINK -f "${BASH_SOURCE[0]:-${(%):-%x}}")")"
+    file="$1"
+    shift
+    key="$1"
+    shift
+    $DIR/replace-content.py "$file" "$key" "$@"
+}