$ echo "[extensions]" >> $HGRCPATH
  $ echo "bookmarks=" >> $HGRCPATH

  $ echo "[bookmarks]" >> $HGRCPATH
  $ echo "track.current = True" >> $HGRCPATH

  $ hg init

no bookmarks

  $ hg bookmarks
  no bookmarks set

set bookmark X

  $ hg bookmark X

list bookmarks

  $ hg bookmark
   * X                         -1:000000000000

list bookmarks with color

  $ hg --config extensions.color= --config color.mode=ansi \
  >     bookmark --color=always
   * X                         -1:000000000000

update to bookmark X

  $ hg update X
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved

list bookmarks

  $ hg bookmarks
   * X                         -1:000000000000

rename

  $ hg bookmark -m X Z

list bookmarks

  $ hg bookmarks
   * Z                         -1:000000000000

new bookmark Y

  $ hg bookmark Y

list bookmarks

  $ hg bookmark
   * Y                         -1:000000000000
     Z                         -1:000000000000

commit

  $ echo 'b' > b
  $ hg add b
  $ hg commit -m'test'

list bookmarks

  $ hg bookmark
   * Y                         0:719295282060
     Z                         -1:000000000000

delete bookmarks

  $ hg bookmark -d Y
  $ hg bookmark -d Z

list bookmarks

  $ hg bookmark
  no bookmarks set

update to tip

  $ hg update tip
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved

set bookmark Y using -r .

  $ hg bookmark -r . Y

list bookmarks

  $ hg bookmark
   * Y                         0:719295282060