--- a/hgext/share.py	Tue Oct 17 20:25:43 2017 +0200
+++ b/hgext/share.py	Tue Oct 17 21:48:56 2017 -0400
@@ -114,28 +114,7 @@
     if not repo.shared():
         raise error.Abort(_("this is not a shared repo"))
 
-    destlock = lock = None
-    lock = repo.lock()
-    try:
-        # we use locks here because if we race with commit, we
-        # can end up with extra data in the cloned revlogs that's
-        # not pointed to by changesets, thus causing verify to
-        # fail
-
-        destlock = hg.copystore(ui, repo, repo.path)
-
-        sharefile = repo.vfs.join('sharedpath')
-        util.rename(sharefile, sharefile + '.old')
-
-        repo.requirements.discard('shared')
-        repo.requirements.discard('relshared')
-        repo._writerequirements()
-    finally:
-        destlock and destlock.release()
-        lock and lock.release()
-
-    # update store, spath, svfs and sjoin of repo
-    repo.unfiltered().__init__(repo.baseui, repo.root)
+    hg.unshare(ui, repo)
 
 # Wrap clone command to pass auto share options.
 def clone(orig, ui, source, *args, **opts):

--- a/mercurial/hg.py	Tue Oct 17 20:25:43 2017 +0200
+++ b/mercurial/hg.py	Tue Oct 17 21:48:56 2017 -0400
@@ -257,6 +257,35 @@
     _postshareupdate(r, update, checkout=checkout)
     return r
 
+def unshare(ui, repo):
+    """convert a shared repository to a normal one
+
+    Copy the store data to the repo and remove the sharedpath data.
+    """
+
+    destlock = lock = None
+    lock = repo.lock()
+    try:
+        # we use locks here because if we race with commit, we
+        # can end up with extra data in the cloned revlogs that's
+        # not pointed to by changesets, thus causing verify to
+        # fail
+
+        destlock = copystore(ui, repo, repo.path)
+
+        sharefile = repo.vfs.join('sharedpath')
+        util.rename(sharefile, sharefile + '.old')
+
+        repo.requirements.discard('shared')
+        repo.requirements.discard('relshared')
+        repo._writerequirements()
+    finally:
+        destlock and destlock.release()
+        lock and lock.release()
+
+    # update store, spath, svfs and sjoin of repo
+    repo.unfiltered().__init__(repo.baseui, repo.root)
+
 def postshare(sourcerepo, destrepo, bookmarks=True, defaultpath=None):
     """Called after a new shared repo is created.