# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@octobus.net>
# Date 1586826112 -7200
# Node ID 6b01799e9db0311c0b0bd7d8e95549293c2974f1
# Parent  6493f0a567c20f1d3ddde2b59e40e850a6be4c7d
nodemap: add a new mode value, "strict"

When "strict" is set, operation will refuse to use the slow path and abort if
they would. This is useful for testing, benchmarking and server operation.

Differential Revision: https://phab.mercurial-scm.org/D8415

diff -r 6493f0a567c2 -r 6b01799e9db0 mercurial/revlogutils/nodemap.py
--- a/mercurial/revlogutils/nodemap.py	Tue Apr 14 02:45:05 2020 +0200
+++ b/mercurial/revlogutils/nodemap.py	Tue Apr 14 03:01:52 2020 +0200
@@ -148,6 +148,8 @@
         msg = _(b"persistent nodemap in strict mode without efficient method")
         if mode == b'warn':
             tr._report(b"%s\n" % msg)
+        elif mode == b'strict':
+            raise error.Abort(msg)
 
     data = None
     # first attemp an incremental update of the data
diff -r 6493f0a567c2 -r 6b01799e9db0 tests/test-persistent-nodemap.t
--- a/tests/test-persistent-nodemap.t	Tue Apr 14 02:45:05 2020 +0200
+++ b/tests/test-persistent-nodemap.t	Tue Apr 14 03:01:52 2020 +0200
@@ -96,6 +96,17 @@
   5001 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo foo > foo
   $ hg add foo
+
+#if no-pure no-rust
+
+  $ hg ci -m 'foo' --config "experimental.exp-persistent-nodemap.mode=strict"
+  transaction abort!
+  rollback completed
+  abort: persistent nodemap in strict mode without efficient method
+  [255]
+
+#endif
+
   $ hg ci -m 'foo'
 
 #if no-pure no-rust