Reimplement the `get_terms` and `bisect_terms` shell function in C and
add `bisect-terms` subcommand to `git bisect--helper` to call it from
git-bisect.sh .
In the shell version, the terms were identified by strings but in C
version its done by bit manipulation and passing the integer value to
the function.
Using `--bisect-terms` subcommand is a temporary measure to port shell
function in C so as to use the existing test suite. As more functions
are ported, this subcommand will be retired and will be called by some
other methods.
Mentored-by: Lars Schneider <larsxschneider@xxxxxxxxx>
Mentored-by: Christian Couder <chriscool@xxxxxxxxxxxxx>
Signed-off-by: Pranit Bauva <pranit.bauva@xxxxxxxxx>
---
builtin/bisect--helper.c | 74 +++++++++++++++++++++++++++++++++++++++++++++++-
git-bisect.sh | 35 ++---------------------
2 files changed, 75 insertions(+), 34 deletions(-)
diff --git a/builtin/bisect--helper.c b/builtin/bisect--helper.c
index 71f4cf0..81a16a5 100644
--- a/builtin/bisect--helper.c
+++ b/builtin/bisect--helper.c
@@ -8,6 +8,13 @@
#include "run-command.h"
#include "prompt.h"
+enum terms_defined {
+ TERM_BAD = 1,
+ TERM_GOOD = 2,
+ TERM_NEW = 4,
+ TERM_OLD = 8
+};
+
static GIT_PATH_FUNC(git_path_bisect_terms, "BISECT_TERMS")
static GIT_PATH_FUNC(git_path_bisect_expected_rev, "BISECT_EXPECTED_REV")
static GIT_PATH_FUNC(git_path_bisect_ancestors_ok, "BISECT_ANCESTORS_OK")
@@ -26,6 +33,7 @@ static const char * const git_bisect_helper_usage[] = {
N_("git bisect--helper --bisect-write <state> <revision> <TERM_GOOD> <TERM_BAD> [<nolog>]"),
N_("git bisect--helper --bisect-check-and-set-terms <command> <TERM_GOOD> <TERM_BAD>"),
N_("git bisect--helper --bisect-next-check [<term>] <TERM_GOOD> <TERM_BAD"),
+ N_("git bisect--helper --bisect-terms [--term-good | --term-old | --term-bad | --term-new]"),
NULL
};
@@ -359,6 +367,43 @@ static int bisect_next_check(const struct bisect_terms *terms,
return 0;
}
+static int get_terms(struct bisect_terms *terms)
+{
+ FILE *fp;
+ int res;
+ fp = fopen(git_path_bisect_terms(), "r");
+ if (!fp)
+ return -1;
+
+ bisect_terms_reset(terms);
+ res = strbuf_getline(&terms->term_bad, fp) == EOF ||
+ strbuf_getline(&terms->term_good, fp) == EOF;
+
+ fclose(fp);
+ return res ? -1 : 0;
+}
+
+static int bisect_terms(struct bisect_terms *terms, int term_defined)
+{
+ if (get_terms(terms)) {
+ fprintf(stderr, "no terms defined\n");
+ return -1;
+ }
+ if (!term_defined) {
+ printf("Your current terms are %s for the old state\nand "
+ "%s for the new state.\n", terms->term_good.buf,
+ terms->term_bad.buf);
+ return 0;
+ }
+
+ if (term_defined == TERM_GOOD || term_defined == TERM_OLD)
+ printf("%s\n", terms->term_good.buf);
+ if (term_defined == TERM_BAD || term_defined == TERM_NEW)
+ printf("%s\n", terms->term_bad.buf);
+
+ return 0;
+}
+
int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
{
enum {
@@ -369,9 +414,11 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
CHECK_EXPECTED_REVS,
BISECT_WRITE,
CHECK_AND_SET_TERMS,
- BISECT_NEXT_CHECK
+ BISECT_NEXT_CHECK,
+ BISECT_TERMS
} cmdmode = 0;
int no_checkout = 0, res = 0;
+ enum terms_defined term_defined = 0;
struct option options[] = {
OPT_CMDMODE(0, "next-all", &cmdmode,
N_("perform 'git bisect next'"), NEXT_ALL),
@@ -389,6 +436,16 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
N_("check and set terms in a bisection state"), CHECK_AND_SET_TERMS),
OPT_CMDMODE(0, "bisect-next-check", &cmdmode,
N_("check whether bad or good terms exist"), BISECT_NEXT_CHECK),
+ OPT_CMDMODE(0, "bisect-terms", &cmdmode,
+ N_("print out the bisect terms"), BISECT_TERMS),
+ OPT_BIT(0, "term-bad", &term_defined,
+ N_("show the bad term"), TERM_BAD),
+ OPT_BIT(0, "term-good", &term_defined,
+ N_("show the good term"), TERM_GOOD),
+ OPT_BIT(0, "term-new", &term_defined,
+ N_("show the new term"), TERM_NEW),
+ OPT_BIT(0, "term-old", &term_defined,
+ N_("show the old term"), TERM_OLD),
OPT_BOOL(0, "no-checkout", &no_checkout,
N_("update BISECT_HEAD instead of checking out the current commit")),
OPT_END()
@@ -399,6 +456,16 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
argc = parse_options(argc, argv, prefix, options,
git_bisect_helper_usage, 0);
+ if (cmdmode != BISECT_TERMS && term_defined)
+ die(_("--term-bad, --term-good, --term-new and --term-old "
+ "can be used only with --bisect-terms"));
+
+ if (term_defined != 0 && term_defined != TERM_BAD &&
+ term_defined != TERM_GOOD && term_defined != TERM_NEW &&
+ term_defined != TERM_OLD)
+ die(_("only one option among --term-bad, --term-good, "
+ "--term-new and --term-old can be used."));
+
if (!cmdmode)
usage_with_options(git_bisect_helper_usage, options);
@@ -446,6 +513,11 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
strbuf_addstr(&terms.term_bad, argv[1]);
res = bisect_next_check(&terms, argc == 3 ? argv[2] : NULL);
break;
+ case BISECT_TERMS:
+ if (argc > 1)
+ die(_("--bisect-terms requires 0 or 1 argument"));
+ res = bisect_terms(&terms, term_defined);
+ break;
default:
die("BUG: unknown subcommand '%d'", cmdmode);
}
diff --git a/git-bisect.sh b/git-bisect.sh
index c2d6319..aea97c5f 100755
--- a/git-bisect.sh
+++ b/git-bisect.sh
@@ -355,7 +355,7 @@ bisect_replay () {
"$TERM_GOOD"|"$TERM_BAD"|skip)
git bisect--helper --bisect-write "$command" "$rev" "$TERM_GOOD" "$TERM_BAD" || exit;;
terms)
- bisect_terms $rev ;;
+ git bisect--helper --bisect-terms $rev || exit;;
*)
die "$(gettext "?? what are you talking about?")" ;;
esac
@@ -437,37 +437,6 @@ get_terms () {
fi
}
-bisect_terms () {
- get_terms
- if ! test -s "$GIT_DIR/BISECT_TERMS"
- then
- die "$(gettext "no terms defined")"
- fi
- case "$#" in
- 0)
- gettextln "Your current terms are $TERM_GOOD for the old state
-and $TERM_BAD for the new state."
- ;;
- 1)
- arg=$1
- case "$arg" in
- --term-good|--term-old)
- printf '%s\n' "$TERM_GOOD"
- ;;
- --term-bad|--term-new)
- printf '%s\n' "$TERM_BAD"
- ;;
- *)
- die "$(eval_gettext "invalid argument \$arg for 'git bisect terms'.
-Supported options are: --term-good|--term-old and --term-bad|--term-new.")"
- ;;
- esac
- ;;
- *)
- usage ;;
- esac
-}
-
case "$#" in
0)
usage ;;
@@ -498,7 +467,7 @@ case "$#" in
run)
bisect_run "$@" ;;
terms)
- bisect_terms "$@" ;;
+ git bisect--helper --bisect-terms "$@" || exit;;
*)
usage ;;
esac
--
https://github.com/git/git/pull/281
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