git-diff.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2005 Linus Torvalds
   4 # Copyright (c) 2005 Junio C Hamano
   5
   6 rev=$(git-rev-parse --revs-only --no-flags --sq "$@") || exit
   7 flags=$(git-rev-parse --no-revs --flags --sq "$@")
   8 files=$(git-rev-parse --no-revs --no-flags --sq "$@")
   9
  10 : ${flags:="'-M' '-p'"}
  11
  12 # I often say 'git diff --cached -p' and get scolded by git-diff-files, but
  13 # obviously I mean 'git diff --cached -p HEAD' in that case.
  14 case "$rev" in
  15 '')
  16         case " $flags " in
  17         *" '--cached' "*)
  18                 rev='HEAD '
  19                 ;;
  20         esac
  21 esac
  22
  23 case "$rev" in
  24 ?*' '?*' '?*)
  25         echo >&2 "I don't understand"
  26         exit 1
  27         ;;
  28 ?*' '^?*)
  29         begin=$(expr "$rev" : '.*^.\([0-9a-f]*\).*') &&
  30         end=$(expr "$rev" : '.\([0-9a-f]*\). .*') || exit
  31         cmd="git-diff-tree $flags $begin $end $files"
  32         ;;
  33 ?*' '?*)
  34         cmd="git-diff-tree $flags $rev $files"
  35         ;;
  36 ?*' ')
  37         cmd="git-diff-index $flags $rev $files"
  38         ;;
  39 '')
  40         cmd="git-diff-files $flags $files"
  41         ;;
  42 *)
  43         die "I don't understand $*"
  44         ;;
  45 esac
  46
  47 eval "$cmd"