Documentation / diff-options.txton commit trivial: use git-repo-config to detect if the test can be run on the repository (e58b97a)
   1-p::
   2        Generate patch (see section on generating patches)
   3
   4-u::
   5        Synonym for "-p".
   6
   7-z::
   8        \0 line termination on output
   9
  10--name-only::
  11        Show only names of changed files.
  12
  13--name-status::
  14        Show only names and status of changed files.
  15
  16--full-index::
  17        Instead of the first handful characters, show full
  18        object name of pre- and post-image blob on the "index"
  19        line when generating a patch format output.     
  20
  21--abbrev[=<n>]::
  22        Instead of showing the full 40-byte hexadecimal object
  23        name in diff-raw format output and diff-tree header
  24        lines, show only handful hexdigits prefix.  This is
  25        independent of --full-index option above, which controls
  26        the diff-patch output format.  Non default number of
  27        digits can be specified with --abbrev=<n>.
  28
  29-B::
  30        Break complete rewrite changes into pairs of delete and create.
  31
  32-M::
  33        Detect renames.
  34
  35-C::
  36        Detect copies as well as renames.
  37
  38--find-copies-harder::
  39        For performance reasons, by default, -C option finds copies only 
  40        if the original file of the copy was modified in the same 
  41        changeset.  This flag makes the command
  42        inspect unmodified files as candidates for the source of
  43        copy.  This is a very expensive operation for large
  44        projects, so use it with caution.
  45
  46-l<num>::
  47        -M and -C options require O(n^2) processing time where n
  48        is the number of potential rename/copy targets.  This
  49        option prevents rename/copy detection from running if
  50        the number of rename/copy targets exceeds the specified
  51        number.
  52
  53-S<string>::
  54        Look for differences that contain the change in <string>.
  55
  56--pickaxe-all::
  57        When -S finds a change, show all the changes in that
  58        changeset, not just the files that contain the change
  59        in <string>.
  60
  61-O<orderfile>::
  62        Output the patch in the order specified in the
  63        <orderfile>, which has one shell glob pattern per line.
  64
  65-R::
  66        Swap two inputs; that is, show differences from index or
  67        on-disk file to tree contents.
  68
  69For more detailed explanation on these common options, see also
  70link:diffcore.html[diffcore documentation].