# HG changeset patch
# User Anton Shestakov <av6@dwimlabs.net>
# Date 1689619959 10800
# Node ID 90b631fde2d76559f77c92be52aa889603a1cb50
# Parent  ce67a138c5d6daf3b0a8477164586f80a7c661d4
topic: only set topic on workingcommitctx if it doesn't already have one

This fix is so obvious, that I wonder, if this is the correct thing to do, why
wasn't it done like this from the beginning. Despite my doubts, all the tests
pass.

diff -r ce67a138c5d6 -r 90b631fde2d7 hgext3rd/topic/__init__.py
--- a/hgext3rd/topic/__init__.py	Wed Jul 05 15:51:56 2023 -0300
+++ b/hgext3rd/topic/__init__.py	Mon Jul 17 15:52:39 2023 -0300
@@ -556,7 +556,7 @@
         def commitctx(self, ctx, *args, **kwargs):
             if isinstance(ctx, context.workingcommitctx):
                 current = self.currenttopic
-                if current:
+                if current and constants.extrakey not in ctx.extra():
                     ctx.extra()[constants.extrakey] = current
             return super(topicrepo, self).commitctx(ctx, *args, **kwargs)
 
diff -r ce67a138c5d6 -r 90b631fde2d7 tests/test-namespaces.t
--- a/tests/test-namespaces.t	Wed Jul 05 15:51:56 2023 -0300
+++ b/tests/test-namespaces.t	Mon Jul 17 15:52:39 2023 -0300
@@ -71,6 +71,51 @@
   abort: unknown revision 'alice'
   [10]
 
+Export/import of topic namespaces
+
+  $ hg export
+  # HG changeset patch
+  # User test
+  # Date 0 0
+  #      Thu Jan 01 00:00:00 1970 +0000
+  # Branch stable
+  # Node ID 69c7dbf6acd180eeec055dd67933badd3601d45f
+  # Parent  0000000000000000000000000000000000000000
+  # EXP-Topic feature
+  a
+  
+  diff -r 000000000000 -r 69c7dbf6acd1 a
+  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+  +++ b/a	Thu Jan 01 00:00:00 1970 +0000
+  @@ -0,0 +1,1 @@
+  +a
+
+  $ hg import - << EOF
+  > # HG changeset patch
+  > # User test
+  > # Date 0 0
+  > #      Thu Jan 01 00:00:00 1970 +0000
+  > # Branch another-branch
+  > # Node ID 94981e5d988ea23cf2b17f6c07c39edc0f174b01
+  > # Parent  d6d47657e765570283ec03fc68836d9eb297c4b3
+  > # EXP-Topic mytopic
+  > added z
+  > 
+  > diff --git a/z b/z
+  > new file mode 100644
+  > --- /dev/null
+  > +++ b/z
+  > @@ -0,0 +1,1 @@
+  > +z
+  > EOF
+  applying patch from stdin
+
+  $ hg log -r tip -T '{rev}: {branch} {topic_namespace} {topic}\n'
+  1: stable alice mytopic
+
+  $ hg log -r tip -T '{rev}: {fqbn}\n'
+  1: stable//alice/mytopic
+
 Revsets
 
   $ nslog() {
@@ -79,14 +124,19 @@
 
   $ nslog 'topicnamespace(:)'
   0: alice
+  1: alice
   $ nslog 'topicnamespace(all())'
   0: alice
+  1: alice
   $ nslog 'topicnamespace(topicnamespace("alice"))'
   0: alice
+  1: alice
   $ nslog 'topicnamespace(wdir())'
   0: alice
+  1: alice
   $ nslog 'topicnamespace("re:ice$")'
   0: alice
+  1: alice
   $ nslog 'topicnamespace(nonsense)'
   abort: unknown revision 'nonsense'
   [10]