[PATCH 06/15] [GSOC] ref-filter: pass get_object() return value to their callers

From: ZheNing Hu via GitGitGadget <gitgitgadget@gmail.com>
Date: Jul 1, 2021, 16:08 UTC
Message-ID: <d7af86dc1cb6ccee5b9ad6d4da13334c0d4c7dcc.1625155693.git.gitgitgadget@gmail.com>
In-Reply-To: <pull.989.git.1625155693.gitgitgadget@gmail.com>

From: ZheNing Hu <adlternative@gmail.com>

Because in the refactor of `git cat-file --batch` later, oid_object_info_extended() in get_object() will be used to obtain the info of an object with it's oid. When the object cannot be obtained in the git repository, `cat-file --batch` expects to output "<oid> missing" and continue the next oid query instead of letting Git exit. In other error conditions, Git should exit normally. So we can achieve this function by passing the return value of get_object().

Mentored-by: Christian Couder <christian.couder@gmail.com>
Mentored-by: Hariom Verma <hariom18599@gmail.com>
Helped-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: ZheNing Hu <adlternative@gmail.com>
---
 ref-filter.c | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/ref-filter.c b/ref-filter.c
index 10c78de9cfa..e4988aa8a24 100644
--- a/ref-filter.c
+++ b/ref-filter.c
@@ -1816,6 +1816,7 @@ static int populate_value(struct ref_array_item *ref, struct strbuf *err)
 {
 	struct object *obj;
 	int i;
+	int ret;
 	struct object_info empty = OBJECT_INFO_INIT;
 
 	CALLOC_ARRAY(ref->value, used_atom_cnt);
@@ -1972,8 +1973,9 @@ static int populate_value(struct ref_array_item *ref, struct strbuf *err)
 
 
 	oi.oid = ref->objectname;
-	if (get_object(ref, 0, &obj, &oi, err))
-		return -1;
+	ret = get_object(ref, 0, &obj, &oi, err);
+	if (ret)
+		return ret;
 
 	/*
 	 * If there is no atom that wants to know about tagged
@@ -2005,8 +2007,10 @@ static int get_ref_atom_value(struct ref_array_item *ref, int atom,
 			      struct atom_value **v, struct strbuf *err)
 {
 	if (!ref->value) {
-		if (populate_value(ref, err))
-			return -1;
+		int ret = populate_value(ref, err);
+
+		if (ret)
+			return ret;
 		fill_missing_values(ref->value);
 	}
 	*v = &ref->value[atom];
@@ -2580,6 +2584,7 @@ int format_ref_array_item(struct ref_array_item *info,
 {
 	const char *cp, *sp, *ep;
 	struct ref_formatting_state state = REF_FORMATTING_STATE_INIT;
+	int ret;
 
 	state.quote_style = format->quote_style;
 	push_stack_element(&state.stack);
@@ -2592,10 +2597,10 @@ int format_ref_array_item(struct ref_array_item *info,
 		if (cp < sp)
 			append_literal(cp, sp, &state);
 		pos = parse_ref_filter_atom(format, sp + 2, ep, error_buf);
-		if (pos < 0 || get_ref_atom_value(info, pos, &atomv, error_buf) ||
+		if (pos < 0 || (ret = get_ref_atom_value(info, pos, &atomv, error_buf)) ||
 		    atomv->handler(atomv, &state, error_buf)) {
 			pop_stack_element(&state.stack);
-			return -1;
+			return ret ? ret : -1;
 		}
 	}
 	if (*cp) {

-- 
gitgitgadget