Re: [RFC/PATCH v11 08/13] bisect--helper: `is_expected_rev` & `check_expected_revs` shell function in C

[Junio C Hamano]

Pranit Bauva  writes:

> + for (i = 0; i < rev_nr; i++) {
> + if (!is_expected_rev(revs[i])) {
> + remove_path(git_path_bisect_ancestors_ok());
> + remove_path(git_path_bisect_expected_rev());
> + return 0;

Same comment on the use of this helper function applies here, too.
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[RFC/PATCH v11 08/13] bisect--helper: `is_expected_rev` & `check_expected_revs` shell function in C

[Pranit Bauva]

Reimplement `is_expected_rev` & `check_expected_revs` shell function in
C and add a `--check-expected-revs` subcommand to `git bisect--helper` to
call it from git-bisect.sh .

Using `--check-expected-revs` subcommand is a temporary measure to port
shell functions to C so as to use the existing test suite. As more
functions are ported, this subcommand would be retired and will be
called by some other method.

Helped-by: Eric Sunshine 
Mentored-by: Lars Schneider 
Mentored-by: Christian Couder 
Signed-off-by: Pranit Bauva 
---
 builtin/bisect--helper.c | 33 -
 git-bisect.sh| 20 ++--
 2 files changed, 34 insertions(+), 19 deletions(-)

diff --git a/builtin/bisect--helper.c b/builtin/bisect--helper.c
index 0e09630..c0f7091 100644
--- a/builtin/bisect--helper.c
+++ b/builtin/bisect--helper.c
@@ -162,13 +162,40 @@ static int bisect_reset(const char *commit)
return bisect_clean_state();
 }
 
+static int is_expected_rev(const char *expected_hex)
+{
+   struct strbuf actual_hex = STRBUF_INIT;
+   int res = 0;
+   if (strbuf_read_file(_hex, git_path_bisect_expected_rev(), 0) >= 
0) {
+   strbuf_trim(_hex);
+   res = !strcmp(actual_hex.buf, expected_hex);
+   }
+   strbuf_release(_hex);
+   return res;
+}
+
+static int check_expected_revs(const char **revs, int rev_nr)
+{
+   int i;
+
+   for (i = 0; i < rev_nr; i++) {
+   if (!is_expected_rev(revs[i])) {
+   remove_path(git_path_bisect_ancestors_ok());
+   remove_path(git_path_bisect_expected_rev());
+   return 0;
+   }
+   }
+   return 0;
+}
+
 int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 {
enum {
NEXT_ALL = 1,
WRITE_TERMS,
BISECT_CLEAN_STATE,
-   BISECT_RESET
+   BISECT_RESET,
+   CHECK_EXPECTED_REVS
} cmdmode = 0;
int no_checkout = 0;
struct option options[] = {
@@ -180,6 +207,8 @@ int cmd_bisect__helper(int argc, const char **argv, const 
char *prefix)
 N_("cleanup the bisection state"), BISECT_CLEAN_STATE),
OPT_CMDMODE(0, "bisect-reset", ,
 N_("reset the bisection state"), BISECT_RESET),
+   OPT_CMDMODE(0, "check-expected-revs", ,
+N_("check for expected revs"), CHECK_EXPECTED_REVS),
OPT_BOOL(0, "no-checkout", _checkout,
 N_("update BISECT_HEAD instead of checking out the 
current commit")),
OPT_END()
@@ -206,6 +235,8 @@ int cmd_bisect__helper(int argc, const char **argv, const 
char *prefix)
if (argc > 1)
die(_("--bisect-reset requires either zero or one 
arguments"));
return bisect_reset(argc ? argv[0] : NULL);
+   case CHECK_EXPECTED_REVS:
+   return check_expected_revs(argv, argc);
default:
die("BUG: unknown subcommand '%d'", cmdmode);
}
diff --git a/git-bisect.sh b/git-bisect.sh
index 18580b7..4f6545e 100755
--- a/git-bisect.sh
+++ b/git-bisect.sh
@@ -238,22 +238,6 @@ bisect_write() {
test -n "$nolog" || echo "git bisect $state $rev" 
>>"$GIT_DIR/BISECT_LOG"
 }
 
-is_expected_rev() {
-   test -f "$GIT_DIR/BISECT_EXPECTED_REV" &&
-   test "$1" = $(cat "$GIT_DIR/BISECT_EXPECTED_REV")
-}
-
-check_expected_revs() {
-   for _rev in "$@"; do
-   if ! is_expected_rev "$_rev"
-   then
-   rm -f "$GIT_DIR/BISECT_ANCESTORS_OK"
-   rm -f "$GIT_DIR/BISECT_EXPECTED_REV"
-   return
-   fi
-   done
-}
-
 bisect_skip() {
all=''
for arg in "$@"
@@ -280,7 +264,7 @@ bisect_state() {
rev=$(git rev-parse --verify $(bisect_head)) ||
die "$(gettext "Bad rev input: $(bisect_head)")"
bisect_write "$state" "$rev"
-   check_expected_revs "$rev" ;;
+   git bisect--helper --check-expected-revs "$rev" ;;
2,"$TERM_BAD"|*,"$TERM_GOOD"|*,skip)
shift
hash_list=''
@@ -294,7 +278,7 @@ bisect_state() {
do
bisect_write "$state" "$rev"
done
-   check_expected_revs $hash_list ;;
+   git bisect--helper --check-expected-revs $hash_list ;;
*,"$TERM_BAD")
die "$(eval_gettext "'git bisect \$TERM_BAD' can take only one 
argument.")" ;;
*)

--
https://github.com/git/git/pull/281
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