precheck: Switch to file-based detection and report all conditions

Detect all ongoing git conditions by checking for the existence of some
file or directory within the .git folder.  This eliminates the previous
git rev-parse --verify commands, which should be a slight boost to
performance.  Furthermore, the implementation of rebase detection is no
longer a special case.

Also, restructure the script such that all applicable conditions are
reported when run, not just the first we detect.  The script exit code
reflects the highest value of the active conditions.  Though, as an
optimization, still exit on the first found when --quiet is in effect.

The script is cleaned up as well.  In some cases style is changed to
better match the current state of git-sonar.  git-status is now only
called once and cached for both dirty and untracked detection.

Signed-off-by: Matt Hunter <m@lfurio.us>

0 files changed, 0 insertions, 0 deletions