[GSoC Update] Week 3

[Pranit Bauva <pranit.bauva@gmail.com>]

============================ INTRODUCTION ==============================
The purpose of this project is to convert the git-bisect utility which
partly exists in the form of shell scripts to C code so as to make it more
portable. I plan to do this by converting each function to C and then
calling it from git-bisect.sh so as to use the existing test suite to test
the function which is converted.

Mentors:
Christian Couder <chriscool@tuxfamily.org>
Lars Schneider <larsxschneider@gmail.com>

============================== UPDATES =================================
Things which were done in this week:

 * My patches for write_terms()[1] and bisect_log()/voc()[2] have collected
   some reviews from Eric Sunshine and Johannes Schindelin.

 * As advised in the reviews I have mainly read about git_path() and other
   related functions from cache.h

 * Also read up on the refs stuff like for_each_ref_in() which Junio
   mentioned in the previous update email.

 * I have made 2 commits[3] which I am keeping on hold for now as they are
   followup for a commit made by Jeff King which I came across while
   reading about git_path() and related stuff.

 * I have kind of finished writing bisect_clean_state() function. But I
   am still working on that as I suspect there might be something missing.

============================ NEXT STEPS ================================
Since I wasn't able to cover up many things this week (which I had
initially planned), those things have now been carried forward along with
a few other stuff. I plan to work more this week and the coming few ones
to make up for the lost time.

Things which would be done in the coming week:

 * Finish off (finally) bisect_clean_state() conversion.

 * Convert the function bisect_head(). I plan to convert this function and
   add it as a subcommand to test the implementation but I will only send
   the function without the subcommand to the mailing list because its a
   too small function. Though the subcommand version will be put up on
   github for everyone to verify whether it is passing the test suite like
   I have done it for bisect_voc().

 * Convert the function bisect_write(). I plan to convert this function
   and add it as a subcommand.

 * Investigate why test no. 43 and 44 are failing in t6030 with `|| exit`
   in --write-terms.

[1]: http://thread.gmane.org/gmane.comp.version-control.git/294388
[2]: http://thread.gmane.org/gmane.comp.version-control.git/294571