Teach "git diff" to handle filenames starting with '-'
[git/git.git] / 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"