subrepo: change default path in hgrc of subrepo after cloning

Previous behavior was to put in the cloned subrepos the path found in the original main repo.
However it isn't valid for relative path and it seems more logical to reference instead the subrepos
working copy path of the original main repo.

mercurial/subrepo.py

@@ -183,7 +183,8 b' class hgsubrepo(object):'
             util.makedirs(root)
             self._repo = hg.repository(r.ui, root, create=True)
             f = file(os.path.join(root, '.hg', 'hgrc'), 'w')
-            f.write('[paths]\ndefault = %s\n' % state[0])
+            f.write('[paths]\ndefault = %s\n' % os.path.join(
+                _abssource(ctx._repo), path))
             f.close()
         self._repo._subparent = r
         self._repo._subsource = state[0]

tests/test-subrepo

@@ -160,5 +160,27 b' hg ci -Am1'
 
 hg up 5
 hg merge 4    # try to merge default into br again
+cd ..
+
+echo % test repository cloning
+mkdir mercurial mercurial2
+hg init nested_absolute
+echo test > nested_absolute/foo
+hg -R nested_absolute add
+hg -R nested_absolute ci -mtest
+cd mercurial
+hg init nested_relative
+echo test2 > nested_relative/foo2
+hg -R nested_relative add
+hg -R nested_relative ci -mtest2
+hg init main
+echo nested_relative = ../nested_relative > main/.hgsub
+echo nested_absolute = $PWD/nested_absolute >> main/.hgsub
+hg -R main add
+hg -R main ci -m "add subrepos"
+cd ..
+hg clone mercurial/main mercurial2/main
+cat mercurial2/main/nested_absolute/.hg/hgrc mercurial2/main/nested_relative/.hg/hgrc | sed "s:${PWD}:/tmp:"
+rm -rf mercurial mercurial2
 
 exit 0

tests/test-subrepo.out

@@ -243,3 +243,15 b' committing subrepository s'
 0 files updated, 0 files merged, 0 files removed, 0 files unresolved
 1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 (branch merge, don't forget to commit)
+% test repository cloning
+adding nested_absolute/foo
+adding nested_relative/foo2
+adding main/.hgsub
+committing subrepository nested_relative
+committing subrepository nested_absolute
+updating to branch default
+2 files updated, 0 files merged, 0 files removed, 0 files unresolved
+[paths]
+default = /tmp/mercurial/main/nested_absolute
+[paths]
+default = /tmp/mercurial/main/nested_relative