Mercurial > hgrepos > Python > libs > ConfigMix

diff configmix/config.py @ 349:83f76a41cf7c

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Implement a special filter named "None" that suppresses "KeyErrors" from interpolation lookups and returns a Python "None" instead
author Franz Glasner <fzglas.hg@dom66.de>
date Thu, 24 Jun 2021 09:33:22 +0200
parents a04cd5dbcd2c
children 9d729c479dc2
line wrap: on
line diff
--- a/configmix/config.py	Wed Jun 23 15:00:37 2021 +0200
+++ b/configmix/config.py	Thu Jun 24 09:33:22 2021 +0200
@@ -345,7 +345,12 @@
                 return s
             varname, filters = self._split_filters(s[start+2:end])
             try:
-                varvalue = self._apply_filters(filters, self.getvar_s(varname))
+                if "None" in filters:
+                    varvalue = self._apply_filters(
+                        filters, self.getvar_s(varname, default=None))
+                else:
+                    varvalue = self._apply_filters(
+                        filters, self.getvar_s(varname))
             except KeyError:
                 warnings.warn("Cannot expand variable %r in string "
                               "%r" % (varname, s, ),