config: Revert removal of {packages}/{opts} hack

jayvdb · gaborbernat · commit ff4bd47c327d · 2021-01-12T09:19:09.000Z
This was removed in e4d0d60, and replaced with a neater approach, however the newer approach doesnt work for replacements from other sections. Fixes #1777
diff --git a/docs/changelog/1777.bugfix.rst b/docs/changelog/1777.bugfix.rst
@@ -0,0 +1 @@
+Fix regression that broke using install_command in config replacements - by :user:`jayvdb`
diff --git a/src/tox/config/__init__.py b/src/tox/config/__init__.py
@@ -1848,6 +1848,12 @@ def _replace_match(self, match):
             return os.pathsep
 
         default_value = g["default_value"]
+        # special case: opts and packages. Leave {opts} and
+        # {packages} intact, they are replaced manually in
+        # _venv.VirtualEnv.run_install_command.
+        if sub_value in ("opts", "packages"):
+            return "{{{}}}".format(sub_value)
+
         if sub_value == "posargs":
             return self.reader.getposargs(default_value)
 

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	+Fix regression that broke using install_command in config replacements - by :user:`jayvdb`