Andrew's git - gitweb.git/blob

   1#!/bin/sh
   2#
   3# Copyright (c) 2005 Linus Torvalds
   4# Copyright (c) 2005 Junio C Hamano
   5
   6USAGE='[ --diff-options ] <ent>{0,2} [<path>...]'
   7SUBDIRECTORY_OK='Yes'
   8. git-sh-setup
   9
  10rev=$(git-rev-parse --revs-only --no-flags --sq "$@") || exit
  11flags=$(git-rev-parse --no-revs --flags --sq "$@")
  12files=$(git-rev-parse --no-revs --no-flags --sq "$@")
  13
  14# I often say 'git diff --cached -p' and get scolded by git-diff-files, but
  15# obviously I mean 'git diff --cached -p HEAD' in that case.
  16case "$rev" in
  17'')
  18        case " $flags " in
  19        *" '--cached' "*)
  20                rev='HEAD '
  21                ;;
  22        esac
  23esac
  24
  25# If we do not have --name-status, --name-only nor -r, default to -p.
  26# If we do not have -B nor -C, default to -M.
  27case " $flags " in
  28*" '--name-status' "* | *" '--name-only' "* | *" '-r' "* )
  29        ;;
  30*)
  31        flags="$flags'-p' " ;;
  32esac
  33case " $flags " in
  34*" '-"[BCM]* | *" '--find-copies-harder' "*)
  35        ;; # something like -M50.
  36*)
  37        flags="$flags'-M' " ;;
  38esac
  39
  40case "$rev" in
  41?*' '?*' '?*)
  42        usage
  43        ;;
  44?*' '^?*)
  45        begin=$(expr "$rev" : '.*^.\([0-9a-f]*\).*') &&
  46        end=$(expr "$rev" : '.\([0-9a-f]*\). .*') || exit
  47        cmd="git-diff-tree $flags $begin $end -- $files"
  48        ;;
  49?*' '?*)
  50        cmd="git-diff-tree $flags $rev -- $files"
  51        ;;
  52?*' ')
  53        cmd="git-diff-index $flags $rev -- $files"
  54        ;;
  55'')
  56        cmd="git-diff-files $flags -- $files"
  57        ;;
  58*)
  59        usage
  60        ;;
  61esac
  62
  63eval "$cmd"