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bisect--helper: bisect_clean_state shell function in C

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Reimplement `bisect_clean_state` shell function in C and add a
`bisect-clean-state` subcommand to `git bisect--helper` to call it from
git-bisect.sh .

Using `--bisect-clean-state` subcommand is a measure to port shell
function to C so as to use the existing test suite. As more functions
are ported, this subcommand will be retired but its implementation  will
be called by bisect_reset() and bisect_start().

Also introduce a function `mark_for_removal` to store the refs which
need to be removed while iterating through the refs.

Mentored-by: Lars Schneider <larsxschneider@gmail.com>
Mentored-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Pranit Bauva <pranit.bauva@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Pranit Bauva 2017-09-29 06:49:39 +00:00 committed by Junio C Hamano
parent ecb3f3733c
commit fb71a32996
4 changed files with 56 additions and 24 deletions
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42
bisect.c
View File

@ -433,7 +433,12 @@ static int read_bisect_refs(void)
static GIT_PATH_FUNC(git_path_bisect_names, "BISECT_NAMES")
static GIT_PATH_FUNC(git_path_bisect_expected_rev, "BISECT_EXPECTED_REV")
static GIT_PATH_FUNC(git_path_bisect_ancestors_ok, "BISECT_ANCESTORS_OK")
static GIT_PATH_FUNC(git_path_bisect_run, "BISECT_RUN")
static GIT_PATH_FUNC(git_path_bisect_start, "BISECT_START")
static GIT_PATH_FUNC(git_path_bisect_log, "BISECT_LOG")
static GIT_PATH_FUNC(git_path_bisect_terms, "BISECT_TERMS")
static GIT_PATH_FUNC(git_path_head_name, "head-name")
static void read_bisect_paths(struct argv_array *array)
{
@ -1044,3 +1049,40 @@ int estimate_bisect_steps(int all)
return (e < 3 * x) ? n : n - 1;
}
static int mark_for_removal(const char *refname, const struct object_id *oid,
int flag, void *cb_data)
{
struct string_list *refs = cb_data;
char *ref = xstrfmt("refs/bisect%s", refname);
string_list_append(refs, ref);
return 0;
}
int bisect_clean_state(void)
{
int result = 0;
/* There may be some refs packed during bisection */
struct string_list refs_for_removal = STRING_LIST_INIT_NODUP;
for_each_ref_in("refs/bisect", mark_for_removal, (void *) &refs_for_removal);
string_list_append(&refs_for_removal, xstrdup("BISECT_HEAD"));
result = delete_refs("bisect: remove", &refs_for_removal, REF_NODEREF);
refs_for_removal.strdup_strings = 1;
string_list_clear(&refs_for_removal, 0);
unlink_or_warn(git_path_bisect_expected_rev());
unlink_or_warn(git_path_bisect_ancestors_ok());
unlink_or_warn(git_path_bisect_log());
unlink_or_warn(git_path_bisect_names());
unlink_or_warn(git_path_bisect_run());
unlink_or_warn(git_path_bisect_terms());
/* Cleanup head-name if it got left by an old version of git-bisect */
unlink_or_warn(git_path_head_name());
/*
* Cleanup BISECT_START last to support the --no-checkout option
* introduced in the commit 4796e823a.
*/
unlink_or_warn(git_path_bisect_start());
return result;
}

2
bisect.h
View File

@ -28,4 +28,6 @@ extern int estimate_bisect_steps(int all);
extern void read_bisect_terms(const char **bad, const char **good);
extern int bisect_clean_state(void);
#endif

10
builtin/bisect--helper.c
View File

@ -9,6 +9,7 @@ static GIT_PATH_FUNC(git_path_bisect_terms, "BISECT_TERMS")
static const char * const git_bisect_helper_usage[] = {
N_("git bisect--helper --next-all [--no-checkout]"),
N_("git bisect--helper --write-terms <bad_term> <good_term>"),
N_("git bisect--helper --bisect-clean-state"),
NULL
};
@ -83,7 +84,8 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
{
enum {
NEXT_ALL = 1,
WRITE_TERMS
WRITE_TERMS,
BISECT_CLEAN_STATE
} cmdmode = 0;
int no_checkout = 0;
struct option options[] = {
@ -91,6 +93,8 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
N_("perform 'git bisect next'"), NEXT_ALL),
OPT_CMDMODE(0, "write-terms", &cmdmode,
N_("write the terms to .git/BISECT_TERMS"), WRITE_TERMS),
OPT_CMDMODE(0, "bisect-clean-state", &cmdmode,
N_("cleanup the bisection state"), BISECT_CLEAN_STATE),
OPT_BOOL(0, "no-checkout", &no_checkout,
N_("update BISECT_HEAD instead of checking out the current commit")),
OPT_END()
@ -109,6 +113,10 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
if (argc != 2)
return error(_("--write-terms requires two arguments"));
return write_terms(argv[0], argv[1]);
case BISECT_CLEAN_STATE:
if (argc != 0)
return error(_("--bisect-clean-state requires no arguments"));
return bisect_clean_state();
default:
return error("BUG: unknown subcommand '%d'", cmdmode);
}

26
git-bisect.sh
View File

@ -186,7 +186,7 @@ bisect_start() {
#
# Get rid of any old bisect state.
#
bisect_clean_state || exit
git bisect--helper --bisect-clean-state || exit
#
# Change state.
@ -195,7 +195,7 @@ bisect_start() {
# We have to trap this to be able to clean up using
# "bisect_clean_state".
#
trap 'bisect_clean_state' 0
trap 'git bisect--helper --bisect-clean-state' 0
trap 'exit 255' 1 2 3 15
#
@ -430,27 +430,7 @@ bisect_reset() {
die "$(eval_gettext "Could not check out original HEAD '\$branch'.
Try 'git bisect reset <commit>'.")"
fi
bisect_clean_state
}
bisect_clean_state() {
# There may be some refs packed during bisection.
git for-each-ref --format='%(refname) %(objectname)' refs/bisect/\* |
while read ref hash
do
git update-ref -d $ref $hash || exit
done
rm -f "$GIT_DIR/BISECT_EXPECTED_REV" &&
rm -f "$GIT_DIR/BISECT_ANCESTORS_OK" &&
rm -f "$GIT_DIR/BISECT_LOG" &&
rm -f "$GIT_DIR/BISECT_NAMES" &&
rm -f "$GIT_DIR/BISECT_RUN" &&
rm -f "$GIT_DIR/BISECT_TERMS" &&
# Cleanup head-name if it got left by an old version of git-bisect
rm -f "$GIT_DIR/head-name" &&
git update-ref -d --no-deref BISECT_HEAD &&
# clean up BISECT_START last
rm -f "$GIT_DIR/BISECT_START"
git bisect--helper --bisect-clean-state || exit
}
bisect_replay () {