Shallow clones (--depth X) lack the N tag used to compute
the revision number: use 'git-YYYY-MM-DD-hhhhhhh' as revision,
where hhhhhhh is the short git hash.

Snapshots from gitweb do not have git information at all,
but they have the short git hash in the directory name:
append it to the release number.

Signed-off-by: Mans Rullgard <mans@mansr.com>

This makes binaries produced by source tarballs identify themselves with
the version number of the corresponding release series, unless overriden
by a 'VERSION' file.

This reverts commit a03be6e1.

(cherry picked from commit 203df50d)

Patch by: Ramiro Polla <ramiro <DOT> polla  gmail <DOT> com>

Originally committed as revision 26394 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 24527 to svn://svn.ffmpeg.org/ffmpeg/trunk

affected by changes in other directories (such as branches).

Originally committed as revision 21252 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 21068 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 21067 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 21065 to svn://svn.ffmpeg.org/ffmpeg/trunk

information from git.

Originally committed as revision 20015 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 19655 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 17836 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 17578 to svn://svn.ffmpeg.org/ffmpeg/trunk

This will be used by daily snapshots without Subversion metadata.

Originally committed as revision 17577 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 17576 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 15434 to svn://svn.ffmpeg.org/ffmpeg/trunk

FFmpeg's version string output. This can be used by distributions to mark
their packages as being modified versions without hacking the sources.

Originally committed as revision 15433 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 13819 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 10817 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 10816 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 9363 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 9362 to svn://svn.ffmpeg.org/ffmpeg/trunk

patch by Michel Bardiaux, mbardiaux mediaxim be

Originally committed as revision 6179 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 5861 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 5859 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 5539 to svn://svn.ffmpeg.org/ffmpeg/trunk

based on a patch by Ismail Dönmez ismail##@##pardus##.##org##.##tr

Originally committed as revision 5511 to svn://svn.ffmpeg.org/ffmpeg/trunk

based on a patch by Ismail Dönmez ismail$$at$$pardus$$dot$$org$$dot$$tr

Originally committed as revision 5502 to svn://svn.ffmpeg.org/ffmpeg/trunk