This reimplements the `check_term_format` shell function in C and adds
a `--check-term-format` subcommand to `git bisect--helper` to call it
from git-bisect.sh
Helped-by: Johannes Schindelein <Johannes.Schindelein@xxxxxx>
Mentored-by: Lars Schneider <larsxschneider@xxxxxxxxx>
Mentored-by: Christian Couder <chriscool@xxxxxxxxxxxxx>
Signed-off-by: Pranit Bauva <pranit.bauva@xxxxxxxxx>
---
builtin/bisect--helper.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++-
git-bisect.sh | 31 ++------------------------
2 files changed, 59 insertions(+), 30 deletions(-)
diff --git a/builtin/bisect--helper.c b/builtin/bisect--helper.c
index 5f6ef8c..228920f 100644
--- a/builtin/bisect--helper.c
+++ b/builtin/bisect--helper.c
@@ -2,16 +2,66 @@
#include "cache.h"
#include "parse-options.h"
#include "bisect.h"
+#include "refs.h"
static const char * const git_bisect_helper_usage[] = {
N_("git bisect--helper --next-all [--no-checkout]"),
+ N_("git bisect--helper --check-term-format <term> <orig_term>"),
NULL
};
enum sub_commands {
- NEXT_ALL = 1
+ NEXT_ALL = 1,
+ CHECK_TERM_FMT
};
+/*
+ * To check whether the string `term` belongs to the set of strings
+ * included in the variable arguments so as to make the code look
+ * clean and avoid having long lines in the `if` statement.
+ */
+static int one_of(const char *term, ...)
+{
+ va_list matches;
+ const char *match;
+
+ va_start(matches, term);
+ while ((match = va_arg(matches, const char *)) != NULL)
+ if (!strcmp(term, match))
+ return 1;
+
+ va_end(matches);
+
+ return 0;
+}
+
+static int check_term_format(const char *term, const char *orig_term,
+ int flag)
+{
+ struct strbuf new_term = STRBUF_INIT;
+ strbuf_addf(&new_term, "refs/bisect/%s", term);
+
+ if (check_refname_format(new_term.buf, flag))
+ die(_("'%s' is not a valid term\n"), term);
+
+ else if (one_of(term, "help", "start", "skip", "next", "reset",
+ "visualize", "replay", "log", "run", NULL))
+ return error("can't use the builtin command '%s' as a term\n", term);
+
+ /*
+ * In theory, nothing prevents swapping
+ * completely good and bad, but this situation
+ * could be confusing and hasn't been tested
+ * enough. Forbid it for now.
+ */
+
+ else if ((one_of(term, "bad", "new", NULL) && strcmp(orig_term, "bad")) ||
+ (one_of(term, "good", "old", NULL) && strcmp(orig_term, "good")))
+ return error("can't change the meaning of the term '%s'\n", term);
+
+ return 0;
+}
+
int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
{
int sub_command = 0;
@@ -19,6 +69,8 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
struct option options[] = {
OPT_CMDMODE(0, "next-all", &sub_command,
N_("perform 'git bisect next'"), NEXT_ALL),
+ OPT_CMDMODE(0, "check-term-format", &sub_command,
+ N_("check format of the ref"), CHECK_TERM_FMT),
OPT_BOOL(0, "no-checkout", &no_checkout,
N_("update BISECT_HEAD instead of checking out the current commit")),
OPT_END()
@@ -33,6 +85,10 @@ int cmd_bisect__helper(int argc, const char **argv, const char *prefix)
switch (sub_command) {
case NEXT_ALL:
return bisect_next_all(prefix, no_checkout);
+ case CHECK_TERM_FMT:
+ if (argc != 2)
+ die(_("--check-term-format should be followed by exactly 2 arguments."));
+ return check_term_format(argv[0], argv[1], 0);
default:
die(_("bug: unknown subcommand '%d'"), sub_command);
}
diff --git a/git-bisect.sh b/git-bisect.sh
index 5d1cb00..7d7965d 100755
--- a/git-bisect.sh
+++ b/git-bisect.sh
@@ -564,38 +564,11 @@ write_terms () {
then
die "$(gettext "please use two different terms")"
fi
- check_term_format "$TERM_BAD" bad
- check_term_format "$TERM_GOOD" good
+ git bisect--helper --check-term-format "$TERM_BAD" bad || exit
+ git bisect--helper --check-term-format "$TERM_GOOD" good || exit
printf '%s\n%s\n' "$TERM_BAD" "$TERM_GOOD" >"$GIT_DIR/BISECT_TERMS"
}
-check_term_format () {
- term=$1
- git check-ref-format refs/bisect/"$term" ||
- die "$(eval_gettext "'\$term' is not a valid term")"
- case "$term" in
- help|start|terms|skip|next|reset|visualize|replay|log|run)
- die "$(eval_gettext "can't use the builtin command '\$term' as a term")"
- ;;
- bad|new)
- if test "$2" != bad
- then
- # In theory, nothing prevents swapping
- # completely good and bad, but this situation
- # could be confusing and hasn't been tested
- # enough. Forbid it for now.
- die "$(eval_gettext "can't change the meaning of term '\$term'")"
- fi
- ;;
- good|old)
- if test "$2" != good
- then
- die "$(eval_gettext "can't change the meaning of term '\$term'")"
- fi
- ;;
- esac
-}
-
check_and_set_terms () {
cmd="$1"
case "$cmd" in
--
2.8.1
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