bundle: transpose transaction scope with bundle type switch

This moves the transaction with-statements outside of the
per-bundle-version switches, so the next patch will be a little
simpler.

mercurial/commands.py

@@ -5203,14 +5203,15 b' def unbundle(ui, repo, fname1, *fnames, '
                         hint=_('use "hg debugapplystreamclonebundle"'))
             url = 'bundle:' + fname
             try:
+                txnname = 'unbundle'
+                if not isinstance(gen, bundle2.unbundle20):
+                    txnname = 'unbundle\n%s' % util.hidepassword(url)
+                with repo.transaction(txnname) as tr:
                 if isinstance(gen, bundle2.unbundle20):
-                    with repo.transaction('unbundle') as tr:
                         op = bundle2.applybundle(repo, gen, tr,
                                                  source='unbundle',
                                                  url=url)
                 else:
-                    txnname = 'unbundle\n%s' % util.hidepassword(url)
-                    with repo.transaction(txnname) as tr:
                         op = bundle2.applybundle1(repo, gen, tr,
                                                   source='unbundle', url=url)
             except error.BundleUnknownFeatureError as exc:

mercurial/repair.py

@@ -207,13 +207,14 b' def strip(ui, repo, nodelist, backup=Tru'
                 # silence internal shuffling chatter
                 repo.ui.pushbuffer()
             tmpbundleurl = 'bundle:' + vfs.join(tmpbundlefile)
+            txnname = 'strip'
+            if not isinstance(gen, bundle2.unbundle20):
+                txnname = "strip\n%s" % util.hidepassword(tmpbundleurl)
+            with repo.transaction(txnname) as tr:
             if isinstance(gen, bundle2.unbundle20):
-                with repo.transaction('strip') as tr:
                     bundle2.applybundle(repo, gen, tr, source='strip',
                                         url=tmpbundleurl)
             else:
-                txnname = "strip\n%s" % util.hidepassword(tmpbundleurl)
-                with repo.transaction(txnname) as tr:
                     bundle2.applybundle1(repo, gen, tr, 'strip', tmpbundleurl,
                                          emptyok=True)
             if not repo.ui.verbose: