Re: [PATCH 4/4] promisor-remote: teach lazy-fetch in any repo

diff --git a/t/helper/test-partial-clone.c b/t/helper/test-partial-clone.c
new file mode 100644
index 0000000000..e7bc7eb21f
--- /dev/null
+++ b/t/helper/test-partial-clone.c

@@ -0,0 +1,34 @@
+#include "cache.h"
+#include "test-tool.h"
+#include "repository.h"
+#include "object-store.h"
+
+static void object_info(const char *gitdir, const char *oid_hex)
+{
+       struct repository r;
+       struct object_id oid;
+       unsigned long size;
+       struct object_info oi = {.sizep = &size};
+       const char *p;
+
+       if (repo_init(&r, gitdir, NULL))
+               die("could not init repo");
+       if (parse_oid_hex(oid_hex, &oid, &p))
+               die("could not parse oid");
+       if (oid_object_info_extended(&r, &oid, &oi, 0))
+               die("could not obtain object info");
+       printf("%d\n", (int) size);
+}
+
+int cmd__partial_clone(int argc, const char **argv)
+{
+       if (argc < 4)
+               die("too few arguments");
+
+       if (!strcmp(argv[1], "object-info"))
+               object_info(argv[2], argv[3]);
+       else
+               die("invalid argument '%s'", argv[1]);
+
+       return 0;
+}

diff --git a/t/helper/test-tool.c b/t/helper/test-tool.c
index c5bd0c6d4c..b21e8f1519 100644
--- a/t/helper/test-tool.c
+++ b/t/helper/test-tool.c

@@ -46,6 +46,7 @@ static struct test_cmd cmds[] = {
        { "online-cpus", cmd__online_cpus },
        { "parse-options", cmd__parse_options },
        { "parse-pathspec-file", cmd__parse_pathspec_file },
+       { "partial-clone", cmd__partial_clone },
        { "path-utils", cmd__path_utils },
        { "pcre2-config", cmd__pcre2_config },
        { "pkt-line", cmd__pkt_line },

diff --git a/t/helper/test-tool.h b/t/helper/test-tool.h
index e8069a3b22..f845ced4b3 100644
--- a/t/helper/test-tool.h
+++ b/t/helper/test-tool.h

@@ -35,6 +35,7 @@ int cmd__oidmap(int argc, const char **argv);
 int cmd__online_cpus(int argc, const char **argv);
 int cmd__parse_options(int argc, const char **argv);
 int cmd__parse_pathspec_file(int argc, const char** argv);
+int cmd__partial_clone(int argc, const char **argv);
 int cmd__path_utils(int argc, const char **argv);
 int cmd__pcre2_config(int argc, const char **argv);
 int cmd__pkt_line(int argc, const char **argv);

diff --git a/t/t0410-partial-clone.sh b/t/t0410-partial-clone.sh
index 584a039b85..e804d267e6 100755
--- a/t/t0410-partial-clone.sh
+++ b/t/t0410-partial-clone.sh

@@ -604,6 +604,30 @@ test_expect_success 'do not fetch when checking existence of tree we construct o
        git -C repo cherry-pick side1
 '

+test_expect_success 'lazy-fetch when accessing object not in the_repository' '
+       rm -rf full partial.git &&
+       test_create_repo full &&
+       printf 12345 >full/file.txt &&
+       git -C full add file.txt &&
+       git -C full commit -m "first commit" &&
+
+       test_config -C full uploadpack.allowfilter 1 &&
+       test_config -C full uploadpack.allowanysha1inwant 1 &&
+       git clone --filter=blob:none --bare "file://$(pwd)/full" partial.git &&
+       FILE_HASH=$(git hash-object --stdin <full/file.txt) &&
+
+       # Sanity check that the file is missing
+       git -C partial.git rev-list --objects --missing=print HEAD >out &&
+       grep "[?]$FILE_HASH" out &&
+
+       OUT=$(test-tool partial-clone object-info partial.git "$FILE_HASH") &&
+       test "$OUT" -eq 5 &&
+
+       # Sanity check that the file is now present
+       git -C partial.git rev-list --objects --missing=print HEAD >out &&
+       ! grep "[?]$FILE_HASH" out
+'
+