# HG changeset patch
# User Matt Harbison <matt_harbison@yahoo.com>
# Date 1675121111 18000
# Node ID 84680c003d449ae4387f8be479a7a6ab3a05eb9b
# Parent  566f7dd563c19d3ca535c140fd1e41208fedf156
bundlerepo: enforce the requirements declared by the underlying repository

Previously, `hg log -r 'bundle()' -R bundle.hg` was failing for me when run from
source, complaining about an unknown parent, when the system installed `hg`
didn't.  Some debugging showed the index was 0 length.  It turned out that I
didn't have the C extensions compiled, which a simple `hg log -r .` was able to
indicate.  The problem being that the RequirementError got handled by RepoError,
which uses an empty directory as a fallback to process the bundle.

diff -r 566f7dd563c1 -r 84680c003d44 mercurial/bundlerepo.py
--- a/mercurial/bundlerepo.py	Sat Jan 28 18:26:28 2023 +0400
+++ b/mercurial/bundlerepo.py	Mon Jan 30 18:25:11 2023 -0500
@@ -533,6 +533,8 @@
     try:
         repo = localrepo.instance(ui, repopath, create=False)
         tempparent = None
+    except error.RequirementError:
+        raise  # no fallback if the backing repo is unsupported
     except error.RepoError:
         tempparent = pycompat.mkdtemp()
         try:
diff -r 566f7dd563c1 -r 84680c003d44 tests/test-requires.t
--- a/tests/test-requires.t	Sat Jan 28 18:26:28 2023 +0400
+++ b/tests/test-requires.t	Mon Jan 30 18:25:11 2023 -0500
@@ -81,4 +81,14 @@
   abort: required features are not supported in the destination: featuresetup-test
   [255]
 
+Bundlerepo also enforces the underlying repo requirements
+
+  $ hg --cwd supported bundle --all ../bundle.hg
+  1 changesets found
+  $ echo outdoor-pool > push-dst/.hg/requires
+  $ hg --cwd push-dst log -R ../bundle.hg -T phases
+  abort: repository requires features unknown to this Mercurial: outdoor-pool
+  (see https://mercurial-scm.org/wiki/MissingRequirement for more information)
+  [255]
+
   $ cd ..