diff --git a/hgext/largefiles/overrides.py b/hgext/largefiles/overrides.py
--- a/hgext/largefiles/overrides.py
+++ b/hgext/largefiles/overrides.py
@@ -905,8 +905,8 @@
 
     return result
 
-def hgpostshare(orig, sourcerepo, destrepo, bookmarks=True, defaultpath=None):
-    orig(sourcerepo, destrepo, bookmarks, defaultpath)
+def hgpostshare(orig, sourcerepo, destrepo, defaultpath=None):
+    orig(sourcerepo, destrepo, defaultpath=defaultpath)
 
     # If largefiles is required for this repo, permanently enable it locally
     if 'largefiles' in destrepo.requirements:
diff --git a/hgext/lfs/wrapper.py b/hgext/lfs/wrapper.py
--- a/hgext/lfs/wrapper.py
+++ b/hgext/lfs/wrapper.py
@@ -240,8 +240,8 @@
 
     return result
 
-def hgpostshare(orig, sourcerepo, destrepo, bookmarks=True, defaultpath=None):
-    orig(sourcerepo, destrepo, bookmarks, defaultpath)
+def hgpostshare(orig, sourcerepo, destrepo, defaultpath=None):
+    orig(sourcerepo, destrepo, defaultpath=defaultpath)
 
     # If lfs is required for this repo, permanently enable it locally
     if 'lfs' in destrepo.requirements:
diff --git a/mercurial/hg.py b/mercurial/hg.py
--- a/mercurial/hg.py
+++ b/mercurial/hg.py
@@ -259,12 +259,17 @@
         srcrepo = source.local()
         checkout = None
 
+    shareditems = set()
+    if bookmarks:
+        shareditems.add(sharedbookmarks)
+
     r = repository(ui, dest, create=True, createopts={
         'sharedrepo': srcrepo,
         'sharedrelative': relative,
+        'shareditems': shareditems,
     })
 
-    postshare(srcrepo, r, bookmarks=bookmarks, defaultpath=defaultpath)
+    postshare(srcrepo, r, defaultpath=defaultpath)
     _postshareupdate(r, update, checkout=checkout)
     return r
 
@@ -315,7 +320,7 @@
 
     return newrepo
 
-def postshare(sourcerepo, destrepo, bookmarks=True, defaultpath=None):
+def postshare(sourcerepo, destrepo, defaultpath=None):
     """Called after a new shared repo is created.
 
     The new repo only has a requirements file and pointer to the source.
@@ -330,10 +335,6 @@
                     'default = %s\n')
         destrepo.vfs.write('hgrc', util.tonativeeol(template % default))
 
-    with destrepo.wlock():
-        if bookmarks:
-            destrepo.vfs.write('shared', sharedbookmarks + '\n')
-
 def _postshareupdate(repo, update, checkout=None):
     """Maybe perform a working directory update after a shared repo is created.
 
diff --git a/mercurial/localrepo.py b/mercurial/localrepo.py
--- a/mercurial/localrepo.py
+++ b/mercurial/localrepo.py
@@ -2786,6 +2786,7 @@
         'narrowfiles',
         'sharedrepo',
         'sharedrelative',
+        'shareditems',
     }
 
     return {k: v for k, v in createopts.items() if k not in known}
@@ -2806,6 +2807,8 @@
        Boolean indicating if the path to the shared repo should be
        stored as relative. By default, the pointer to the "parent" repo
        is stored as an absolute path.
+    shareditems
+       Set of items to share to the new repository (in addition to storage).
     """
     createopts = createopts or {}
 
@@ -2867,6 +2870,10 @@
     if 'sharedrepo' in createopts:
         hgvfs.write(b'sharedpath', sharedpath)
 
+    if createopts.get('shareditems'):
+        shared = b'\n'.join(sorted(createopts['shareditems'])) + b'\n'
+        hgvfs.write(b'shared', shared)
+
 def poisonrepository(repo):
     """Poison a repository instance so it can no longer be used."""
     # Perform any cleanup on the instance.