ref-filter: rename objectname related functions and fields

In previous commits, we prepared some `objectname` related functions
for more generic usage, so that these functions can be used for `tree`
and `parent` atom.

But the name of some functions and fields may mislead someone.
For ex: function `objectname_atom_parser()` implies that it is
for atom `objectname`.

Let's rename all such functions and fields.

Mentored-by: Christian Couder <[email protected]>
Mentored-by: Heba Waly <[email protected]>
Signed-off-by: Hariom Verma <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: harry-hov

ref-filter.c

@@ -139,7 +139,7 @@ static struct used_atom {
 		struct {
 			enum { O_FULL, O_LENGTH, O_SHORT } option;
 			unsigned int length;
-		} objectname;
+		} oid;
 		struct email_option {
 			enum { EO_RAW, EO_TRIM, EO_LOCALPART } option;
 		} email_option;
@@ -361,20 +361,20 @@ static int contents_atom_parser(const struct ref_format *format, struct used_ato
 	return 0;
 }
 
-static int objectname_atom_parser(const struct ref_format *format, struct used_atom *atom,
-				  const char *arg, struct strbuf *err)
+static int oid_atom_parser(const struct ref_format *format, struct used_atom *atom,
+			   const char *arg, struct strbuf *err)
 {
 	if (!arg)
-		atom->u.objectname.option = O_FULL;
+		atom->u.oid.option = O_FULL;
 	else if (!strcmp(arg, "short"))
-		atom->u.objectname.option = O_SHORT;
+		atom->u.oid.option = O_SHORT;
 	else if (skip_prefix(arg, "short=", &arg)) {
-		atom->u.objectname.option = O_LENGTH;
-		if (strtoul_ui(arg, 10, &atom->u.objectname.length) ||
-		    atom->u.objectname.length == 0)
+		atom->u.oid.option = O_LENGTH;
+		if (strtoul_ui(arg, 10, &atom->u.oid.length) ||
+		    atom->u.oid.length == 0)
 			return strbuf_addf_ret(err, -1, _("positive value expected '%s' in %%(%s)"), arg, atom->name);
-		if (atom->u.objectname.length < MINIMUM_ABBREV)
-			atom->u.objectname.length = MINIMUM_ABBREV;
+		if (atom->u.oid.length < MINIMUM_ABBREV)
+			atom->u.oid.length = MINIMUM_ABBREV;
 	} else
 		return strbuf_addf_ret(err, -1, _("unrecognized argument '%s' in %%(%s)"), arg, atom->name);
 	return 0;
@@ -495,7 +495,7 @@ static struct {
 	{ "refname", SOURCE_NONE, FIELD_STR, refname_atom_parser },
 	{ "objecttype", SOURCE_OTHER, FIELD_STR, objecttype_atom_parser },
 	{ "objectsize", SOURCE_OTHER, FIELD_ULONG, objectsize_atom_parser },
-	{ "objectname", SOURCE_OTHER, FIELD_STR, objectname_atom_parser },
+	{ "objectname", SOURCE_OTHER, FIELD_STR, oid_atom_parser },
 	{ "deltabase", SOURCE_OTHER, FIELD_STR, deltabase_atom_parser },
 	{ "tree", SOURCE_OBJ },
 	{ "parent", SOURCE_OBJ },
@@ -918,26 +918,26 @@ int verify_ref_format(struct ref_format *format)
 	return 0;
 }
 
-static const char *do_grab_objectname(const char *field, const struct object_id *oid,
-				      struct used_atom *atom)
+static const char *do_grab_oid(const char *field, const struct object_id *oid,
+			       struct used_atom *atom)
 {
-	switch (atom->u.objectname.option) {
+	switch (atom->u.oid.option) {
 	case O_FULL:
 		return oid_to_hex(oid);
 	case O_LENGTH:
-		return find_unique_abbrev(oid, atom->u.objectname.length);
+		return find_unique_abbrev(oid, atom->u.oid.length);
 	case O_SHORT:
 		return find_unique_abbrev(oid, DEFAULT_ABBREV);
 	default:
 		BUG("unknown %%(%s) option", field);
 	}
 }
 
-static int grab_objectname(const char *name, const char *field, const struct object_id *oid,
-			   struct atom_value *v, struct used_atom *atom)
+static int grab_oid(const char *name, const char *field, const struct object_id *oid,
+		    struct atom_value *v, struct used_atom *atom)
 {
 	if (starts_with(name, field)) {
-		v->s = xstrdup(do_grab_objectname(field, oid, atom));
+		v->s = xstrdup(do_grab_oid(field, oid, atom));
 		return 1;
 	}
 	return 0;
@@ -966,7 +966,7 @@ static void grab_common_values(struct atom_value *val, int deref, struct expand_
 		} else if (!strcmp(name, "deltabase"))
 			v->s = xstrdup(oid_to_hex(&oi->delta_base_oid));
 		else if (deref)
-			grab_objectname(name, "objectname", &oi->oid, v, &used_atom[i]);
+			grab_oid(name, "objectname", &oi->oid, v, &used_atom[i]);
 	}
 }
 
@@ -1746,7 +1746,7 @@ static int populate_value(struct ref_array_item *ref, struct strbuf *err)
 				v->s = xstrdup(buf + 1);
 			}
 			continue;
-		} else if (!deref && grab_objectname(name, "objectname", &ref->objectname, v, atom)) {
+		} else if (!deref && grab_oid(name, "objectname", &ref->objectname, v, atom)) {
 			continue;
 		} else if (!strcmp(name, "HEAD")) {
 			if (atom->u.head && !strcmp(ref->refname, atom->u.head))