diff options
| -rw-r--r-- | src/odb.c | 79 |
1 files changed, 63 insertions, 16 deletions
@@ -33,6 +33,8 @@ #include "git2/odb_backend.h" +#define GIT_ALTERNATES_FILE "info/alternates" + static int format_object_header(char *hdr, size_t n, git_rawobj *obj) { const char *type_str = git_object_type2string(obj->type); @@ -171,32 +173,77 @@ int git_odb_add_backend(git_odb *odb, git_odb_backend *backend) return GIT_SUCCESS; } +static int add_default_backends(git_odb *db, const char *objects_dir) +{ + git_odb_backend *loose, *packed; + int error; + + /* add the loose object backend */ + error = git_odb_backend_loose(&loose, objects_dir); + if (error < GIT_SUCCESS) + return error; + + error = git_odb_add_backend(db, loose); + if (error < GIT_SUCCESS) + return error; + + /* add the packed file backend */ + error = git_odb_backend_pack(&packed, objects_dir); + if (error < GIT_SUCCESS) + return error; + + error = git_odb_add_backend(db, packed); + if (error < GIT_SUCCESS) + return error; + + return GIT_SUCCESS; +} + +static int load_alternates(git_odb *odb, const char *objects_dir) +{ + char alternates_path[GIT_PATH_MAX]; + char alternate[GIT_PATH_MAX]; + char *buffer; + + gitfo_buf alternates_buf = GITFO_BUF_INIT; + int error; + + git__joinpath(alternates_path, objects_dir, GIT_ALTERNATES_FILE); + + if (gitfo_exists(alternates_path) < GIT_SUCCESS) + return GIT_SUCCESS; + + if (gitfo_read_file(&alternates_buf, alternates_path) < GIT_SUCCESS) + return GIT_EOSERR; + + buffer = (char *)alternates_buf.data; + error = GIT_SUCCESS; + + /* add each alternate as a new backend; one alternate per line */ + while ((error == GIT_SUCCESS) && (buffer = git__strtok(alternate, buffer, "\r\n")) != NULL) + error = add_default_backends(odb, alternate); + + gitfo_free_buf(&alternates_buf); + return error; +} int git_odb_open(git_odb **out, const char *objects_dir) { git_odb *db; - git_odb_backend *loose, *packed; int error; + assert(out && objects_dir); + + *out = NULL; + if ((error = git_odb_new(&db)) < 0) return error; - /* add the loose object backend */ - if (git_odb_backend_loose(&loose, objects_dir) == 0) { - error = git_odb_add_backend(db, loose); - if (error < 0) - goto cleanup; - } - - /* add the packed file backend */ - if (git_odb_backend_pack(&packed, objects_dir) == 0) { - error = git_odb_add_backend(db, packed); - if (error < 0) - goto cleanup; - } + if ((error = add_default_backends(db, objects_dir)) < GIT_SUCCESS) + goto cleanup; - /* TODO: add altenernates as new backends; - * how elevant is that? very elegant. */ + if ((error = load_alternates(db, objects_dir)) < GIT_SUCCESS) + goto cleanup; *out = db; return GIT_SUCCESS; |