Remove empty directories on update

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Remove empty directories on update

manifest hash: 113969ec14c75eb9e1013b23cf096f722932b84d
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tests/test-empty-dir

@@ -0,0 +1,16 b''
+#!/bin/sh
+
+hg init
+echo 123 > a
+hg add a
+hg commit -t "first" -u test -d "0 0" a
+mkdir sub
+echo 321 > sub/b
+hg add sub/b
+hg commit -t "second" -u test -d "0 0" sub/b
+cat sub/b
+hg co 0
+cat sub/b
+ls sub
+
+true

tests/test-empty-dir.out

@@ -0,0 +1,3 b''
+321
+cat: sub/b: No such file or directory
+ls: sub: No such file or directory

mercurial/hg.py

@@ -1255,6 +1255,9 b' class localrepository:'
         for f in remove:
             self.ui.note("removing %s\n" % f)
             os.unlink(f)
+            # try removing directories that might now be empty
+            try: os.removedirs(os.path.dirname(f))
+            except: pass
         if mode == 'n':
             self.dirstate.forget(remove)
         else: