Re: [PATCH v2] git-jump: pick a mode automatically when invoked without arguments

[Junio C Hamano <gitster@pobox.com>]

Junio C Hamano <gitster@pobox.com> writes:

>> +mode_auto() {
>> +	if test "$(git rev-parse --is-inside-work-tree 2>/dev/null)" != "true"; then
>> +		usage >&2
>> +		exit 1
>> +	fi
>
> That looks like a basic safety measure, which is good.
>
>> +	if test -n "$(git ls-files -u "$@")"; then
>> +		mode_merge "$@"
>> +	elif ! git diff --quiet "$@"; then
>> +		mode_diff "$@"
>> +	elif ! git diff --check >/dev/null 2>&1; then
>
> Shouldn't this "diff --check" be restricted by "$@" if given?

>> +		mode_ws "$@"

If there are any unstaged changes (possibly with whitespace errors),
'git diff --quiet' would exit with non-zero, so "elif ! git diff
--quiet" would be taken and we do mode_diff.  The user cannot rely
on "auto" to trigger mode_ws to check whitespace errors in the
working tree files because of this.  If there is no unstaged
changes, 'git diff --quiet' woudl exit with zero, so the control
comes to "git diff --check", but then there is nothing mode_ws to
work on in that case, right?  So it is not clear to me in what
situation this auto selection of mode_ws would help us.

>> +	else
>> +		usage >&2
>> +		exit 1
>> +	fi
>> +}