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bisect: move argument parsing before state modification.

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Currently 'git bisect start' modifies some state prior to checking
that its arguments are valid.

This change moves argument validation before state modification
with the effect that state modification does not occur
unless argument validations succeeds.

An existing test is changed to check that new bisect state
is not created if arguments are invalid.

A new test is added to check that existing bisect state
is not modified if arguments are invalid.

Signed-off-by: Jon Seymour <jon.seymour@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jon Seymour
2011-08-04 22:00:57 +10:00
committed by Junio C Hamano
parent b35acb5345
commit 4764f46492
2 changed files with 44 additions and 36 deletions
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66
git-bisect.sh
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@ -59,6 +59,39 @@ bisect_autostart() {
}
bisect_start() {
#
# Check for one bad and then some good revisions.
#
has_double_dash=0
for arg; do
case "$arg" in --) has_double_dash=1; break ;; esac
done
orig_args=$(git rev-parse --sq-quote "$@")
bad_seen=0
eval=''
while [ $# -gt 0 ]; do
arg="$1"
case "$arg" in
--)
shift
break
;;
*)
rev=$(git rev-parse -q --verify "$arg^{commit}") || {
test $has_double_dash -eq 1 &&
die "$(eval_gettext "'\$arg' does not appear to be a valid revision")"
break
}
case $bad_seen in
0) state='bad' ; bad_seen=1 ;;
*) state='good' ;;
esac
eval="$eval bisect_write '$state' '$rev' 'nolog'; "
shift
;;
esac
done
#
# Verify HEAD.
#
@ -97,39 +130,6 @@ bisect_start() {
#
bisect_clean_state || exit
#
# Check for one bad and then some good revisions.
#
has_double_dash=0
for arg; do
case "$arg" in --) has_double_dash=1; break ;; esac
done
orig_args=$(git rev-parse --sq-quote "$@")
bad_seen=0
eval=''
while [ $# -gt 0 ]; do
arg="$1"
case "$arg" in
--)
shift
break
;;
*)
rev=$(git rev-parse -q --verify "$arg^{commit}") || {
test $has_double_dash -eq 1 &&
die "$(eval_gettext "'\$arg' does not appear to be a valid revision")"
break
}
case $bad_seen in
0) state='bad' ; bad_seen=1 ;;
*) state='good' ;;
esac
eval="$eval bisect_write '$state' '$rev' 'nolog'; "
shift
;;
esac
done
#
# Change state.
# In case of mistaken revs or checkout error, or signals received,