diff mbox series

[v8,4/6] bisect--helper: reimplement `bisect_autostart` shell function in C

Message ID 20200923072740.20772-5-mirucam@gmail.com (mailing list archive)
State Superseded
Headers show
Series Finish converting git bisect to C part 2 subset 1 | expand

Commit Message

Miriam R. Sept. 23, 2020, 7:27 a.m. UTC 
From: Pranit Bauva <pranit.bauva@gmail.com>

Reimplement the `bisect_autostart()` shell function in C and add the
C implementation from `bisect_next()` which was previously left
uncovered.

Add `--bisect-autostart` subcommand to be called from git-bisect.sh.
Using `--bisect-autostart` subcommand is a temporary measure to port
the shell function to C so as to use the existing test suite. As more
functions are ported, this subcommand will be retired and
bisect_autostart() will be called directly by `bisect_state()`.

Change behavior of shell script that returned success when user aborted
the bisection.

Mentored-by: Lars Schneider <larsxschneider@gmail.com>
Mentored-by: Christian Couder <chriscool@tuxfamily.org>
Mentored-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Pranit Bauva <pranit.bauva@gmail.com>
Signed-off-by: Tanushree Tumane <tanushreetumane@gmail.com>
Signed-off-by: Miriam Rubio <mirucam@gmail.com>
---
 builtin/bisect--helper.c | 44 +++++++++++++++++++++++++++++++++++++++-
 git-bisect.sh            | 25 ++---------------------
 2 files changed, 45 insertions(+), 24 deletions(-)

Comments

Johannes Schindelin Sept. 23, 2020, 2:41 p.m. UTC | #1 
Hi Miriam,

On Wed, 23 Sep 2020, Miriam Rubio wrote:

> diff --git a/builtin/bisect--helper.c b/builtin/bisect--helper.c
> index 46d2abb36f..ab27a8dff6 100644
> --- a/builtin/bisect--helper.c
> +++ b/builtin/bisect--helper.c
> @@ -29,6 +29,7 @@ static const char * const git_bisect_helper_usage[] = {
>  	N_("git bisect--helper --bisect-terms [--term-good | --term-old | --term-bad | --term-new]"),
>  	N_("git bisect--helper --bisect-start [--term-{new,bad}=<term> --term-{old,good}=<term>]"
>  					    " [--no-checkout] [--first-parent] [<bad> [<good>...]] [--] [<paths>...]"),
> +	N_("git bisect--helper --bisect-autostart"),
>  	NULL
>  };
>
> @@ -653,6 +654,38 @@ static int bisect_start(struct bisect_terms *terms, const char **argv, int argc)
>  	return res;
>  }
>
> +static inline int file_is_not_empty(const char *path)
> +{
> +	return !is_empty_or_missing_file(path);
> +}
> +
> +static int bisect_autostart(struct bisect_terms *terms)
> +{
> +	int res;
> +	const char *yesno;
> +
> +	if (file_is_not_empty(git_path_bisect_start()))
> +		return 0;
> +
> +	fprintf_ln(stderr, _("You need to start by \"git bisect "
> +			  "start\"\n"));
> +
> +	if (!isatty(STDIN_FILENO))
> +		return -1;
> +
> +	/*
> +	 * TRANSLATORS: Make sure to include [Y] and [n] in your
> +	 * translation. The program will only accept English input
> +	 * at this point.
> +	 */
> +	yesno = git_prompt(_("Do you want me to do it for you "
> +			     "[Y/n]? "), PROMPT_ECHO);
> +	res = tolower(*yesno) == 'n' ?
> +		-1 : bisect_start(terms, empty_strvec, 0);
> +
> +	return res;
> +}
> +
>  int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
>  {
>  	enum {
> @@ -665,7 +698,8 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
>  		CHECK_AND_SET_TERMS,
>  		BISECT_NEXT_CHECK,
>  		BISECT_TERMS,
> -		BISECT_START
> +		BISECT_START,
> +		BISECT_AUTOSTART,
>  	} cmdmode = 0;
>  	int res = 0, nolog = 0;
>  	struct option options[] = {
> @@ -689,6 +723,8 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
>  			 N_("print out the bisect terms"), BISECT_TERMS),
>  		OPT_CMDMODE(0, "bisect-start", &cmdmode,
>  			 N_("start the bisect session"), BISECT_START),
> +		OPT_CMDMODE(0, "bisect-autostart", &cmdmode,
> +			 N_("start the bisection if it has not yet been started"), BISECT_AUTOSTART),
>  		OPT_BOOL(0, "no-log", &nolog,
>  			 N_("no log for BISECT_WRITE")),
>  		OPT_END()
> @@ -748,6 +784,12 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
>  		set_terms(&terms, "bad", "good");
>  		res = bisect_start(&terms, argv, argc);
>  		break;
> +	case BISECT_AUTOSTART:
> +		if (argc)
> +			return error(_("--bisect-autostart does not accept arguments"));
> +		set_terms(&terms, "bad", "good");
> +		res = bisect_autostart(&terms);
> +		break;
>  	default:
>  		BUG("unknown subcommand %d", cmdmode);
>  	}
> diff --git a/git-bisect.sh b/git-bisect.sh
> index 2f60fefcfa..4e9b2d36cb 100755
> --- a/git-bisect.sh
> +++ b/git-bisect.sh
> @@ -49,27 +49,6 @@ bisect_head()
>  	fi
>  }
>
> -bisect_autostart() {
> -	test -s "$GIT_DIR/BISECT_START" || {
> -		gettextln "You need to start by \"git bisect start\"" >&2
> -		if test -t 0
> -		then
> -			# TRANSLATORS: Make sure to include [Y] and [n] in your
> -			# translation. The program will only accept English input
> -			# at this point.
> -			gettext "Do you want me to do it for you [Y/n]? " >&2
> -			read yesno
> -			case "$yesno" in
> -			[Nn]*)
> -				exit ;;
> -			esac
> -			bisect_start
> -		else
> -			exit 1
> -		fi
> -	}
> -}
> -
>  bisect_start() {
>  	git bisect--helper --bisect-start $@ || exit
>
> @@ -108,7 +87,7 @@ bisect_skip() {
>  }
>
>  bisect_state() {
> -	bisect_autostart
> +	git bisect--helper --bisect-autostart || exit
>  	state=$1
>  	git bisect--helper --check-and-set-terms $state $TERM_GOOD $TERM_BAD || exit
>  	get_terms
> @@ -149,7 +128,7 @@ bisect_auto_next() {
>
>  bisect_next() {
>  	case "$#" in 0) ;; *) usage ;; esac
> -	bisect_autostart
> +	git bisect--helper --bisect-autostart

Just like above, we need an `|| exit` here.

Other than that, this patch looks good to me.

Thanks,
Dscho

>  	git bisect--helper --bisect-next-check $TERM_GOOD $TERM_BAD $TERM_GOOD|| exit
>
>  	# Perform all bisection computation, display and checkout
> --
> 2.25.0
>
>
diff mbox series

Patch

diff --git a/builtin/bisect--helper.c b/builtin/bisect--helper.c
index 46d2abb36f..ab27a8dff6 100644
--- a/builtin/bisect--helper.c
+++ b/builtin/bisect--helper.c
@@ -29,6 +29,7 @@  static const char * const git_bisect_helper_usage[] = {
 	N_("git bisect--helper --bisect-terms [--term-good | --term-old | --term-bad | --term-new]"),
 	N_("git bisect--helper --bisect-start [--term-{new,bad}=<term> --term-{old,good}=<term>]"
 					    " [--no-checkout] [--first-parent] [<bad> [<good>...]] [--] [<paths>...]"),
+	N_("git bisect--helper --bisect-autostart"),
 	NULL
 };
 
@@ -653,6 +654,38 @@  static int bisect_start(struct bisect_terms *terms, const char **argv, int argc)
 	return res;
 }
 
+static inline int file_is_not_empty(const char *path)
+{
+	return !is_empty_or_missing_file(path);
+}
+
+static int bisect_autostart(struct bisect_terms *terms)
+{
+	int res;
+	const char *yesno;
+
+	if (file_is_not_empty(git_path_bisect_start()))
+		return 0;
+
+	fprintf_ln(stderr, _("You need to start by \"git bisect "
+			  "start\"\n"));
+
+	if (!isatty(STDIN_FILENO))
+		return -1;
+
+	/*
+	 * TRANSLATORS: Make sure to include [Y] and [n] in your
+	 * translation. The program will only accept English input
+	 * at this point.
+	 */
+	yesno = git_prompt(_("Do you want me to do it for you "
+			     "[Y/n]? "), PROMPT_ECHO);
+	res = tolower(*yesno) == 'n' ?
+		-1 : bisect_start(terms, empty_strvec, 0);
+
+	return res;
+}
+
 int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 {
 	enum {
@@ -665,7 +698,8 @@  int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 		CHECK_AND_SET_TERMS,
 		BISECT_NEXT_CHECK,
 		BISECT_TERMS,
-		BISECT_START
+		BISECT_START,
+		BISECT_AUTOSTART,
 	} cmdmode = 0;
 	int res = 0, nolog = 0;
 	struct option options[] = {
@@ -689,6 +723,8 @@  int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 			 N_("print out the bisect terms"), BISECT_TERMS),
 		OPT_CMDMODE(0, "bisect-start", &cmdmode,
 			 N_("start the bisect session"), BISECT_START),
+		OPT_CMDMODE(0, "bisect-autostart", &cmdmode,
+			 N_("start the bisection if it has not yet been started"), BISECT_AUTOSTART),
 		OPT_BOOL(0, "no-log", &nolog,
 			 N_("no log for BISECT_WRITE")),
 		OPT_END()
@@ -748,6 +784,12 @@  int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
 		set_terms(&terms, "bad", "good");
 		res = bisect_start(&terms, argv, argc);
 		break;
+	case BISECT_AUTOSTART:
+		if (argc)
+			return error(_("--bisect-autostart does not accept arguments"));
+		set_terms(&terms, "bad", "good");
+		res = bisect_autostart(&terms);
+		break;
 	default:
 		BUG("unknown subcommand %d", cmdmode);
 	}
diff --git a/git-bisect.sh b/git-bisect.sh
index 2f60fefcfa..4e9b2d36cb 100755
--- a/git-bisect.sh
+++ b/git-bisect.sh
@@ -49,27 +49,6 @@  bisect_head()
 	fi
 }
 
-bisect_autostart() {
-	test -s "$GIT_DIR/BISECT_START" || {
-		gettextln "You need to start by \"git bisect start\"" >&2
-		if test -t 0
-		then
-			# TRANSLATORS: Make sure to include [Y] and [n] in your
-			# translation. The program will only accept English input
-			# at this point.
-			gettext "Do you want me to do it for you [Y/n]? " >&2
-			read yesno
-			case "$yesno" in
-			[Nn]*)
-				exit ;;
-			esac
-			bisect_start
-		else
-			exit 1
-		fi
-	}
-}
-
 bisect_start() {
 	git bisect--helper --bisect-start $@ || exit
 
@@ -108,7 +87,7 @@  bisect_skip() {
 }
 
 bisect_state() {
-	bisect_autostart
+	git bisect--helper --bisect-autostart || exit
 	state=$1
 	git bisect--helper --check-and-set-terms $state $TERM_GOOD $TERM_BAD || exit
 	get_terms
@@ -149,7 +128,7 @@  bisect_auto_next() {
 
 bisect_next() {
 	case "$#" in 0) ;; *) usage ;; esac
-	bisect_autostart
+	git bisect--helper --bisect-autostart
 	git bisect--helper --bisect-next-check $TERM_GOOD $TERM_BAD $TERM_GOOD|| exit
 
 	# Perform all bisection computation, display and checkout