[PATCH 00/15] port branch.c to use ref-filter's printing options

This is part of unification of the commands 'git tag -l, git branch -l and git for-each-ref'. This ports over branch.c to use ref-filter's printing options.

Initially posted here: $(gmane/279226). It was decided that this series would follow up after refactoring ref-filter parsing mechanism, which is now merged into master (9606218b32344c5c756f7c29349d3845ef60b80c).

Karthik Nayak (15):
  ref-filter: implement %(if), %(then), and %(else) atoms
  ref-filter: implement %(if:equals=<string>) and
    %(if:notequals=<string>)
  ref-filter: modify "%(objectname:short)" to take length
  ref-filter: move get_head_description() from branch.c
  ref-filter: introduce format_ref_array_item()
  ref-filter: make %(upstream:track) prints "[gone]" for invalid
    upstreams
  ref-filter: add support for %(upstream:track,nobracket)
  ref-filter: make "%(symref)" atom work with the ':short' modifier
  ref-filter: introduce symref_atom_parser()
  ref-filter: introduce refname_atom_parser()
  ref-filter: add support for %(refname:dir) and %(refname:base)
  ref-filter: allow porcelain to translate messages in the output
  branch, tag: use porcelain output
  branch: use ref-filter printing APIs
  branch: implement '--format' option

 Documentation/git-branch.txt       |   7 +-
 Documentation/git-for-each-ref.txt |  58 ++++-
 builtin/branch.c                   | 267 +++++++----------------
 builtin/tag.c                      |   2 +
 ref-filter.c                       | 428 +++++++++++++++++++++++++++++++------
 ref-filter.h                       |   7 +
 t/t3203-branch-output.sh           |  11 +
 t/t6040-tracking-info.sh           |   2 +-
 t/t6300-for-each-ref.sh            |  40 +++-
 t/t6302-for-each-ref-filter.sh     |  88 ++++++++
 10 files changed, 637 insertions(+), 273 deletions(-)