D9927: config: use level to properly deal with value priority

[marmoute (Pierre-Yves David)]

marmoute created this revision.
Herald added a reviewer: hg-reviewers.
Herald added a subscriber: mercurial-patches.

REVISION SUMMARY
  A higher priority alias will now take precedence over lower priority ones.
  
  This was a requirements step before using alias more widely, especially to
  rename existing and established config option.

REPOSITORY
  rHG Mercurial

BRANCH
  default

REVISION DETAIL
  https://phab.mercurial-scm.org/D9927

AFFECTED FILES
  mercurial/ui.py
  tests/test-config.t

CHANGE DETAILS

diff --git a/tests/test-config.t b/tests/test-config.t
--- a/tests/test-config.t
+++ b/tests/test-config.t
@@ -477,8 +477,7 @@
   $ HGRCPATH="file-B.rc" hg log -r .
   value-B
   $ HGRCPATH="file-A.rc:file-B.rc" hg log -r .
-  value-A (known-bad-output !)
-  value-B (missing-correct-output !)
+  value-B
 
 Alias and include
 -----------------
@@ -486,15 +485,12 @@
 The pre/post include priority should also apply when tie-breaking alternatives.
 
   $ HGRCPATH="file-C.rc" hg log -r .
-  value-included (known-bad-output !)
-  value-C (missing-correct-output !)
+  value-C
   $ HGRCPATH="file-D.rc" hg log -r .
-  value-D (known-bad-output !)
-  value-included (missing-correct-output !)
+  value-included
 
 command line override
 ---------------------
 
   $ HGRCPATH="file-A.rc:file-B.rc" hg log -r . --config ui.logtemplate="value-CLI\n"
-  value-A (known-bad-output !)
-  value-CLI (missing-correct-output !)
+  value-CLI
diff --git a/mercurial/ui.py b/mercurial/ui.py
--- a/mercurial/ui.py
+++ b/mercurial/ui.py
@@ -664,11 +664,18 @@
             msg %= (section, name, pycompat.bytestr(default))
             self.develwarn(msg, 2, b'warn-config-default')
 
+        candidates = []
+        config = self._data(untrusted)
         for s, n in alternates:
-            candidate = self._data(untrusted).get(s, n, None)
+            candidate = config.get(s, n, None)
             if candidate is not None:
-                value = candidate
-                break
+                candidates.append((s, n, candidate))
+        if candidates:
+
+            def level(x):
+                return config.level(x[0], x[1])
+
+            value = max(candidates, key=level)[2]
 
         if self.debugflag and not untrusted and self._reportuntrusted:
             for s, n in alternates:



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