[PATCH 0/8] builtin-clone

This is my latest version, rebased approximately on current master (or recent maint, I guess). It's missing all of Johan's stuff, which is tests for stuff I've fixed and (after this series) a series to make the clone generate packed refs. I believe Johannes has a bunch of changes, and I haven't been working on this lately, and it needs review more than anything, so I'm sending it out.

Daniel Barkalow (8):
  Mark the list of refs to fetch as const
  Add a lockfile function to append to a file
  Add a library function to add an alternate to the alternates file
  Add a function to set a non-default work tree
  Have a constant extern refspec for "--tags"
  Allow for having for_each_ref() list extra refs
  Provide API access to init_db()
  Build in clone

 Makefile                      |    2 +-
 builtin-clone.c               |  546 +++++++++++++++++++++++++++++++++++++++++
 builtin-fetch.c               |   10 +-
 builtin-init-db.c             |  180 +++++++-------
 builtin.h                     |    1 +
 cache.h                       |    7 +
 contrib/examples/git-clone.sh |  522 +++++++++++++++++++++++++++++++++++++++
 environment.c                 |    6 +
 git-clone.sh                  |  522 ---------------------------------------
 git.c                         |    1 +
 lockfile.c                    |   17 ++
 refs.c                        |   18 ++
 refs.h                        |    9 +
 remote.c                      |    9 +
 remote.h                      |    2 +
 sha1_file.c                   |   12 +
 transport.c                   |   16 +-
 transport.h                   |    4 +-
 18 files changed, 1256 insertions(+), 628 deletions(-)
 create mode 100644 builtin-clone.c
 create mode 100755 contrib/examples/git-clone.sh
 delete mode 100755 git-clone.sh