commit 92db087118aad2bfd84c47936530b6afcc403035
from: Omar Polo <op@omarpolo.com>
date: Sat Feb 04 13:58:00 2023 UTC

handle objectformat=sha256

repository format must be at least 1 for object format to be available.

commit - 3093e2d747a41afd623354136331c7babea32ca8
commit + 92db087118aad2bfd84c47936530b6afcc403035
blob - f6291e8407d22bd8dea75ff94f8f7b88ebafcb78
blob + da3ccae2d248a1264070ba019dbe1c73c139be25
--- include/got_error.h
+++ include/got_error.h
@@ -184,6 +184,7 @@
 #define GOT_ERR_COMMIT_BAD_AUTHOR 166
 #define GOT_ERR_UID		167
 #define GOT_ERR_GID		168
+#define GOT_ERR_OBJECT_FORMAT	169
 
 struct got_error {
         int code;
blob - 041a41fbd209cbb7d7131b52327e59668eea4f41
blob + b3dcf46f0677a58fcf21a1e00a9e98a3586c0126
--- lib/error.c
+++ lib/error.c
@@ -234,6 +234,7 @@ static const struct got_error got_errors[] = {
 	    "make Git unhappy" },
 	{ GOT_ERR_UID, "bad user ID" },
 	{ GOT_ERR_GID, "bad group ID" },
+	{ GOT_ERR_OBJECT_FORMAT, "object format not supported" },
 };
 
 static struct got_custom_error {
blob - b8032ffd3ffe9dab29beaf3cc57c39a6ef957859
blob + 69b8cbb93b53f21dbe2c44280bb25dc5e5c23beb
--- lib/got_lib_repository.h
+++ lib/got_lib_repository.h
@@ -63,6 +63,7 @@ struct got_repository {
 	char *path;
 	char *path_git_dir;
 	int gitdir_fd;
+	enum got_hash_algorithm algo;
 
 	struct got_pathlist_head packidx_paths;
 	struct timespec pack_path_mtime;
@@ -170,7 +171,7 @@ struct got_pack *got_repo_get_pinned_pack(struct got_r
 void got_repo_unpin_pack(struct got_repository *);
 
 const struct got_error *got_repo_read_gitconfig(int *, char **, char **,
-    struct got_remote_repo **, int *, char **, char ***, int *,
+    struct got_remote_repo **, int *, char **, char **, char ***, int *,
     const char *);
 
 const struct got_error *got_repo_temp_fds_get(int *, int *,
blob - d46762d0f8fd908e9beebe23dd87ff3740db4068
blob + 69013f51eff2d0f99eaf8e936973a50f9bfe625e
--- lib/read_gitconfig.c
+++ lib/read_gitconfig.c
@@ -54,7 +54,8 @@ const struct got_error *
 got_repo_read_gitconfig(int *gitconfig_repository_format_version,
     char **gitconfig_author_name, char **gitconfig_author_email,
     struct got_remote_repo **remotes, int *nremotes,
-    char **gitconfig_owner, char ***extensions, int *nextensions,
+    char **gitconfig_owner, char **objectformat,
+    char ***extensions, int *nextensions,
     const char *gitconfig_path)
 {
 	const struct got_error *err = NULL;
@@ -120,6 +121,14 @@ got_repo_read_gitconfig(int *gitconfig_repository_form
 				(*extensions)[(*nextensions)] = extstr;
 				(*nextensions)++;
 			}
+			if (objectformat && !strcmp(val, "objectformat")) {
+				free(*objectformat);
+				*objectformat = strdup(ext);
+				if (*objectformat == NULL) {
+					err = got_error_from_errno("strdup");
+					goto done;
+				}
+			}
 		}
 	}
 
blob - e76312afb71dc950015ded8344d412b185adb00c
blob + d281c9075f8d3df732624aadb75fcae208277105
--- lib/read_gitconfig_privsep.c
+++ lib/read_gitconfig_privsep.c
@@ -47,7 +47,8 @@ const struct got_error *
 got_repo_read_gitconfig(int *gitconfig_repository_format_version,
     char **gitconfig_author_name, char **gitconfig_author_email,
     struct got_remote_repo **remotes, int *nremotes,
-    char **gitconfig_owner, char ***extensions, int *nextensions,
+    char **gitconfig_owner, char **object_format,
+    char ***extensions, int *nextensions,
     const char *gitconfig_path)
 {
 	const struct got_error *err = NULL, *child_err = NULL;
@@ -69,6 +70,8 @@ got_repo_read_gitconfig(int *gitconfig_repository_form
 		*nremotes = 0;
 	if (gitconfig_owner)
 		*gitconfig_owner = NULL;
+	if (object_format)
+		*object_format = NULL;
 
 	fd = open(gitconfig_path, O_RDONLY | O_CLOEXEC);
 	if (fd == -1) {
blob - 035b7755844e1535807379a27b51c214e2352f0a
blob + 5dc87706104f9f936d06b8023afe754d3d054de1
--- lib/repository.c
+++ lib/repository.c
@@ -586,6 +586,7 @@ read_gitconfig(struct got_repository *repo, const char
 {
 	const struct got_error *err = NULL;
 	char *repo_gitconfig_path = NULL;
+	char *object_format = NULL;
 
 	if (global_gitconfig_path) {
 		/* Read settings from ~/.gitconfig. */
@@ -593,7 +594,7 @@ read_gitconfig(struct got_repository *repo, const char
 		err = got_repo_read_gitconfig(&dummy_repo_version,
 		    &repo->global_gitconfig_author_name,
 		    &repo->global_gitconfig_author_email,
-		    NULL, NULL, NULL, NULL, NULL, global_gitconfig_path);
+		    NULL, NULL, NULL, NULL, NULL, NULL, global_gitconfig_path);
 		if (err)
 			return err;
 	}
@@ -607,10 +608,23 @@ read_gitconfig(struct got_repository *repo, const char
 	    &repo->gitconfig_repository_format_version,
 	    &repo->gitconfig_author_name, &repo->gitconfig_author_email,
 	    &repo->gitconfig_remotes, &repo->ngitconfig_remotes,
-	    &repo->gitconfig_owner, &repo->extensions, &repo->nextensions,
+	    &repo->gitconfig_owner, &object_format,
+	    &repo->extensions, &repo->nextensions,
 	    repo_gitconfig_path);
 	if (err)
 		goto done;
+
+	if (!object_format)
+		repo->algo = GOT_HASH_SHA1;
+	else {
+		if (!strcmp(object_format, "sha256"))
+			repo->algo = GOT_HASH_SHA256;
+		else {
+			err = got_error_msg(GOT_ERR_OBJECT_FORMAT,
+			    object_format);
+			goto done;
+		}
+	}
 
 	if (getenv("GOT_IGNORE_GITCONFIG") != NULL) {
 		int i;
@@ -635,6 +649,7 @@ read_gitconfig(struct got_repository *repo, const char
 	}
 
 done:
+	free(object_format);
 	free(repo_gitconfig_path);
 	return err;
 }
@@ -756,10 +771,15 @@ got_repo_open(struct got_repository **repop, const cha
 	err = read_gitconfig(repo, global_gitconfig_path);
 	if (err)
 		goto done;
-	if (repo->gitconfig_repository_format_version != 0) {
+	if (repo->gitconfig_repository_format_version > 1) {
 		err = got_error_path(path, GOT_ERR_GIT_REPO_FORMAT);
 		goto done;
 	}
+	if (repo->gitconfig_repository_format_version == 0 &&
+	    repo->algo != GOT_HASH_SHA1) {
+		err = got_error(GOT_ERR_OBJECT_FORMAT);
+		goto done;
+	}
 	for (i = 0; i < repo->nextensions; i++) {
 		char *ext = repo->extensions[i];
 		int j, supported = 0;