Add special logic for implicit keys and values

src/rezplugins/shell/sh.py

@@ -104,10 +104,13 @@ def _bind_interactive_rez(self):
             self._addline(cmd % r"\[\e[1m\]$REZ_ENV_PROMPT\[\e[0m\]")
 
     def setenv(self, key, value):
+        is_implicit = key == 'REZ_USED_IMPLICIT_PACKAGES'
+
         value = self.escape_string(
             value,
             is_path=self._is_pathed_key(key),
             is_shell_path=self._is_shell_pathed_key(key),
+            is_implicit=is_implicit,
         )
 
         self._addline('export %s=%s' % (key, value))
@@ -124,9 +127,13 @@ def source(self, value):
         value = self.escape_string(value)
         self._addline('. %s' % value)
 
-    def escape_string(self, value, is_path=False, is_shell_path=False):
+    def escape_string(
+        self, value, is_path=False, is_shell_path=False, is_implicit=False
+    ):
         value = EscapedString.promote(value)
-        value = value.expanduser()
+        if not is_implicit:
+            value = value.expanduser()
+
         result = ''
 
         for is_literal, txt in value.strings: