| #!/bin/sh |
| # |
| # Copyright (c) 2005 Linus Torvalds |
| # Copyright (c) 2005 Junio C Hamano |
| |
| rev=$(git-rev-parse --revs-only --no-flags --sq "$@") || exit |
| flags=$(git-rev-parse --no-revs --flags --sq "$@") |
| files=$(git-rev-parse --no-revs --no-flags --sq "$@") |
| |
| die () { |
| echo >&2 "$*" |
| exit 1 |
| } |
| |
| # I often say 'git diff --cached -p' and get scolded by git-diff-files, but |
| # obviously I mean 'git diff --cached -p HEAD' in that case. |
| case "$rev" in |
| '') |
| case " $flags " in |
| *" '--cached' "*) |
| rev='HEAD ' |
| ;; |
| esac |
| esac |
| |
| # If we do not have --name-status, --name-only nor -r, default to -p. |
| # If we do not have -B nor -C, default to -M. |
| case " $flags " in |
| *" '--name-status' "* | *" '--name-only' "* | *" '-r' "* ) |
| ;; |
| *) |
| flags="$flags'-p' " ;; |
| esac |
| case " $flags " in |
| *" '-"[BCM]* | *" '--find-copies-harder' "*) |
| ;; # something like -M50. |
| *) |
| flags="$flags'-M' " ;; |
| esac |
| |
| case "$rev" in |
| ?*' '?*' '?*) |
| echo >&2 "I don't understand" |
| exit 1 |
| ;; |
| ?*' '^?*) |
| begin=$(expr "$rev" : '.*^.\([0-9a-f]*\).*') && |
| end=$(expr "$rev" : '.\([0-9a-f]*\). .*') || exit |
| cmd="git-diff-tree $flags $begin $end -- $files" |
| ;; |
| ?*' '?*) |
| cmd="git-diff-tree $flags $rev -- $files" |
| ;; |
| ?*' ') |
| cmd="git-diff-index $flags $rev -- $files" |
| ;; |
| '') |
| cmd="git-diff-files $flags -- $files" |
| ;; |
| *) |
| die "I don't understand $*" |
| ;; |
| esac |
| |
| eval "$cmd" |