[PATCH RFC 0/5] Patches to avoid reporting conversion changes.

["Henrik Grubbström (Grubba)" <grubba@grubba.org>]

This is the first go at having the git index keep track of the
conversion mode and corresponding normalized blob for files.

The approach is relatively straight-forward:
  * struct cache_entry has been extended with two fields,
    norm_flags and norm_sha1, to keep track of the data.
  * An accessor function ce_norm_sha1() has been added,
    which checks that the fields seem valid, and otherwise
    recalculates them.
  * run_diff_files() and ce_compare_data() compare against
    the normalized blob.

Still missing is a testsuite, and I may have missed some place
that ought to use ce_norm_sha1().

Thanks to Junio C Hamano for the suggestion.

Henrik Grubbström (Grubba) (5):
  sha1_file: Added index_blob().
  cache: Added ce_norm_sha1() and related cache_entry fields.
  cache: Added index extension "NORM".
  reachable: Made the gc aware of the ce_norm_sha1.
  cache: Use ce_norm_sha1().

 cache.h      |   29 +++++++++++++++++++++++++++++
 convert.c    |   35 +++++++++++++++++++++++++++++++++++
 diff-lib.c   |    9 ++++++---
 reachable.c  |    2 ++
 read-cache.c |   51 ++++++++++++++++++++++++++++++++++++++++++++-------
 sha1_file.c  |   19 +++++++++++++++++++
 6 files changed, 135 insertions(+), 10 deletions(-)