1 files changed, 311 insertions, 0 deletions
diff --git a/parse-options-cb.c b/parse-options-cb.c
new file mode 100644
index 0000000..d346dbe
--- /dev/null
+++ b/parse-options-cb.c
@@ -0,0 +1,311 @@
+#include "git-compat-util.h"
+#include "parse-options.h"
+#include "branch.h"
+#include "cache.h"
+#include "commit.h"
+#include "color.h"
+#include "string-list.h"
+#include "strvec.h"
+#include "oid-array.h"
+
+/*----- some often used options -----*/
+
+int parse_opt_abbrev_cb(const struct option *opt, const char *arg, int unset)
+{
+	int v;
+
+	if (!arg) {
+		v = unset ? 0 : DEFAULT_ABBREV;
+	} else {
+		if (!*arg)
+			return error(_("option `%s' expects a numerical value"),
+				     opt->long_name);
+		v = strtol(arg, (char **)&arg, 10);
+		if (*arg)
+			return error(_("option `%s' expects a numerical value"),
+				     opt->long_name);
+		if (v && v < MINIMUM_ABBREV)
+			v = MINIMUM_ABBREV;
+		else if (v > the_hash_algo->hexsz)
+			v = the_hash_algo->hexsz;
+	}
+	*(int *)(opt->value) = v;
+	return 0;
+}
+
+int parse_opt_expiry_date_cb(const struct option *opt, const char *arg,
+			     int unset)
+{
+	if (unset)
+		arg = "never";
+	if (parse_expiry_date(arg, (timestamp_t *)opt->value))
+		die(_("malformed expiration date '%s'"), arg);
+	return 0;
+}
+
+int parse_opt_color_flag_cb(const struct option *opt, const char *arg,
+			    int unset)
+{
+	int value;
+
+	if (!arg)
+		arg = unset ? "never" : (const char *)opt->defval;
+	value = git_config_colorbool(NULL, arg);
+	if (value < 0)
+		return error(_("option `%s' expects \"always\", \"auto\", or \"never\""),
+			     opt->long_name);
+	*(int *)opt->value = value;
+	return 0;
+}
+
+int parse_opt_verbosity_cb(const struct option *opt, const char *arg,
+			   int unset)
+{
+	int *target = opt->value;
+
+	BUG_ON_OPT_ARG(arg);
+
+	if (unset)
+		/* --no-quiet, --no-verbose */
+		*target = 0;
+	else if (opt->short_name == 'v') {
+		if (*target >= 0)
+			(*target)++;
+		else
+			*target = 1;
+	} else {
+		if (*target <= 0)
+			(*target)--;
+		else
+			*target = -1;
+	}
+	return 0;
+}
+
+int parse_opt_commits(const struct option *opt, const char *arg, int unset)
+{
+	struct object_id oid;
+	struct commit *commit;
+
+	BUG_ON_OPT_NEG(unset);
+
+	if (!arg)
+		return -1;
+	if (get_oid(arg, &oid))
+		return error("malformed object name %s", arg);
+	commit = lookup_commit_reference(the_repository, &oid);
+	if (!commit)
+		return error("no such commit %s", arg);
+	commit_list_insert(commit, opt->value);
+	return 0;
+}
+
+int parse_opt_commit(const struct option *opt, const char *arg, int unset)
+{
+	struct object_id oid;
+	struct commit *commit;
+	struct commit **target = opt->value;
+
+	BUG_ON_OPT_NEG(unset);
+
+	if (!arg)
+		return -1;
+	if (get_oid(arg, &oid))
+		return error("malformed object name %s", arg);
+	commit = lookup_commit_reference(the_repository, &oid);
+	if (!commit)
+		return error("no such commit %s", arg);
+	*target = commit;
+	return 0;
+}
+
+int parse_opt_object_name(const struct option *opt, const char *arg, int unset)
+{
+	struct object_id oid;
+
+	if (unset) {
+		oid_array_clear(opt->value);
+		return 0;
+	}
+	if (!arg)
+		return -1;
+	if (get_oid(arg, &oid))
+		return error(_("malformed object name '%s'"), arg);
+	oid_array_append(opt->value, &oid);
+	return 0;
+}
+
+int parse_opt_object_id(const struct option *opt, const char *arg, int unset)
+{
+	struct object_id oid;
+	struct object_id *target = opt->value;
+
+	if (unset) {
+		oidcpy(target, null_oid());
+		return 0;
+	}
+	if (!arg)
+		return -1;
+	if (get_oid(arg, &oid))
+		return error(_("malformed object name '%s'"), arg);
+	*target = oid;
+	return 0;
+}
+
+int parse_opt_tertiary(const struct option *opt, const char *arg, int unset)
+{
+	int *target = opt->value;
+
+	BUG_ON_OPT_ARG(arg);
+
+	*target = unset ? 2 : 1;
+	return 0;
+}
+
+static size_t parse_options_count(const struct option *opt)
+{
+	size_t n = 0;
+
+	for (; opt && opt->type != OPTION_END; opt++)
+		n++;
+	return n;
+}
+
+struct option *parse_options_dup(const struct option *o)
+{
+	struct option no_options[] = { OPT_END() };
+
+	return parse_options_concat(o, no_options);
+}
+
+struct option *parse_options_concat(const struct option *a,
+				    const struct option *b)
+{
+	struct option *ret;
+	size_t a_len = parse_options_count(a);
+	size_t b_len = parse_options_count(b);
+
+	ALLOC_ARRAY(ret, st_add3(a_len, b_len, 1));
+	COPY_ARRAY(ret, a, a_len);
+	COPY_ARRAY(ret + a_len, b, b_len + 1); /* + 1 for final OPTION_END */
+
+	return ret;
+}
+
+int parse_opt_string_list(const struct option *opt, const char *arg, int unset)
+{
+	struct string_list *v = opt->value;
+
+	if (unset) {
+		string_list_clear(v, 0);
+		return 0;
+	}
+
+	if (!arg)
+		return -1;
+
+	string_list_append(v, arg);
+	return 0;
+}
+
+int parse_opt_noop_cb(const struct option *opt, const char *arg, int unset)
+{
+	return 0;
+}
+
+/**
+ * Report that the option is unknown, so that other code can handle
+ * it. This can be used as a callback together with
+ * OPTION_LOWLEVEL_CALLBACK to allow an option to be documented in the
+ * "-h" output even if it's not being handled directly by
+ * parse_options().
+ */
+enum parse_opt_result parse_opt_unknown_cb(struct parse_opt_ctx_t *ctx,
+					   const struct option *opt,
+					   const char *arg, int unset)
+{
+	BUG_ON_OPT_ARG(arg);
+	return PARSE_OPT_UNKNOWN;
+}
+
+/**
+ * Recreates the command-line option in the strbuf.
+ */
+static int recreate_opt(struct strbuf *sb, const struct option *opt,
+		const char *arg, int unset)
+{
+	strbuf_reset(sb);
+
+	if (opt->long_name) {
+		strbuf_addstr(sb, unset ? "--no-" : "--");
+		strbuf_addstr(sb, opt->long_name);
+		if (arg) {
+			strbuf_addch(sb, '=');
+			strbuf_addstr(sb, arg);
+		}
+	} else if (opt->short_name && !unset) {
+		strbuf_addch(sb, '-');
+		strbuf_addch(sb, opt->short_name);
+		if (arg)
+			strbuf_addstr(sb, arg);
+	} else
+		return -1;
+
+	return 0;
+}
+
+/**
+ * For an option opt, recreates the command-line option in opt->value which
+ * must be an char* initialized to NULL. This is useful when we need to pass
+ * the command-line option to another command. Since any previous value will be
+ * overwritten, this callback should only be used for options where the last
+ * one wins.
+ */
+int parse_opt_passthru(const struct option *opt, const char *arg, int unset)
+{
+	static struct strbuf sb = STRBUF_INIT;
+	char **opt_value = opt->value;
+
+	if (recreate_opt(&sb, opt, arg, unset) < 0)
+		return -1;
+
+	free(*opt_value);
+
+	*opt_value = strbuf_detach(&sb, NULL);
+
+	return 0;
+}
+
+/**
+ * For an option opt, recreate the command-line option, appending it to
+ * opt->value which must be a strvec. This is useful when we need to pass
+ * the command-line option, which can be specified multiple times, to another
+ * command.
+ */
+int parse_opt_passthru_argv(const struct option *opt, const char *arg, int unset)
+{
+	static struct strbuf sb = STRBUF_INIT;
+	struct strvec *opt_value = opt->value;
+
+	if (recreate_opt(&sb, opt, arg, unset) < 0)
+		return -1;
+
+	strvec_push(opt_value, sb.buf);
+
+	return 0;
+}
+
+int parse_opt_tracking_mode(const struct option *opt, const char *arg, int unset)
+{
+	if (unset)
+		*(enum branch_track *)opt->value = BRANCH_TRACK_NEVER;
+	else if (!arg || !strcmp(arg, "direct"))
+		*(enum branch_track *)opt->value = BRANCH_TRACK_EXPLICIT;
+	else if (!strcmp(arg, "inherit"))
+		*(enum branch_track *)opt->value = BRANCH_TRACK_INHERIT;
+	else
+		return error(_("option `%s' expects \"%s\" or \"%s\""),
+			     "--track", "direct", "inherit");
+
+	return 0;
+}