[PATCH v4 3/4] fetch-pack: expose fsckObjects configuration logic

["Xing Xin via GitGitGadget" <gitgitgadget@xxxxxxxxx>]

From: Xing Xin <xingxin.xx@xxxxxxxxxxxxx>

Currently, we can use "transfer.fsckObjects" and the more specific
"fetch.fsckObjects" to control checks for broken objects in received
packs during fetches. However, these configurations were only
acknowledged by `fetch-pack.c:get_pack` and did not take effect in
direct bundle fetches and fetches with _bundle-uri_ enabled.

This commit exposes the fetch-then-transfer configuration logic by
adding a new function `fetch_pack_fsck_objects` in fetch-pack.h. This
new function is used to replace the assignment for `fsck_objects` in
`fetch-pack.c:get_pack`. In the next commit, it will also be used by
`bundle.c:unbundle` to better fit fetching scenarios.

Helped-by: Junio C Hamano <gitster@xxxxxxxxx>
Helped-by: Patrick Steinhardt <ps@xxxxxx>
Signed-off-by: Xing Xin <xingxin.xx@xxxxxxxxxxxxx>
---
 fetch-pack.c | 17 +++++++++++------
 fetch-pack.h |  5 +++++
 2 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/fetch-pack.c b/fetch-pack.c
index 7d2aef21add..3acff2baf09 100644
--- a/fetch-pack.c
+++ b/fetch-pack.c
@@ -954,12 +954,7 @@ static int get_pack(struct fetch_pack_args *args,
 		strvec_push(&cmd.args, alternate_shallow_file);
 	}
 
-	if (fetch_fsck_objects >= 0
-	    ? fetch_fsck_objects
-	    : transfer_fsck_objects >= 0
-	    ? transfer_fsck_objects
-	    : 0)
-		fsck_objects = 1;
+	fsck_objects = fetch_pack_fsck_objects();
 
 	if (do_keep || args->from_promisor || index_pack_args || fsck_objects) {
 		if (pack_lockfiles || fsck_objects)
@@ -2046,6 +2041,16 @@ static const struct object_id *iterate_ref_map(void *cb_data)
 	return &ref->old_oid;
 }
 
+int fetch_pack_fsck_objects(void)
+{
+	fetch_pack_setup();
+	if (fetch_fsck_objects >= 0)
+		return fetch_fsck_objects;
+	if (transfer_fsck_objects >= 0)
+		return transfer_fsck_objects;
+	return 0;
+}
+
 struct ref *fetch_pack(struct fetch_pack_args *args,
 		       int fd[],
 		       const struct ref *ref,
diff --git a/fetch-pack.h b/fetch-pack.h
index 6775d265175..b5c579cdae2 100644
--- a/fetch-pack.h
+++ b/fetch-pack.h
@@ -101,4 +101,9 @@ void negotiate_using_fetch(const struct oid_array *negotiation_tips,
  */
 int report_unmatched_refs(struct ref **sought, int nr_sought);
 
+/*
+ * Return true if checks for broken objects in received pack are required.
+ */
+int fetch_pack_fsck_objects(void);
+
 #endif
-- 
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