error handling: move the missing parts over to the new error handling

include/git2/errors.h

@@ -133,6 +133,8 @@ typedef enum {
 	GITERR_INDEX,
 	GITERR_OBJECT,
 	GITERR_NET,
+	GITERR_TAG,
+	GITERR_TREE,
 } git_error_class;
 
 /**

src/commit.c

@@ -310,8 +310,10 @@ int git_commit_parent(git_commit **parent, git_commit *commit, unsigned int n)
 	assert(commit);
 
 	parent_oid = git_vector_get(&commit->parent_oids, n);
-	if (parent_oid == NULL)
-		return git__throw(GIT_ENOTFOUND, "Parent %u does not exist", n);
+	if (parent_oid == NULL) {
+		giterr_set(GITERR_INVALID, "Parent %u does not exist", n);
+		return GIT_ENOTFOUND;
+	}
 
 	return git_commit_lookup(parent, commit->object.repo, parent_oid);
 }

src/delta-apply.c

@@ -51,11 +51,15 @@ int git__delta_apply(
 	 * if not we would underflow while accessing data from the
 	 * base object, resulting in data corruption or segfault.
 	 */
-	if ((hdr_sz(&base_sz, &delta, delta_end) < 0) || (base_sz != base_len))
-		return git__throw(GIT_ERROR, "Failed to apply delta. Base size does not match given data");
+	if ((hdr_sz(&base_sz, &delta, delta_end) < 0) || (base_sz != base_len)) {
+		giterr_set(GITERR_INVALID, "Failed to apply delta. Base size does not match given data");
+		return -1;
+	}
 
-	if (hdr_sz(&res_sz, &delta, delta_end) < 0)
-		return git__throw(GIT_ERROR, "Failed to apply delta. Base size does not match given data");
+	if (hdr_sz(&res_sz, &delta, delta_end) < 0) {
+		giterr_set(GITERR_INVALID, "Failed to apply delta. Base size does not match given data");
+		return -1;
+	}
 
 	if ((res_dp = git__malloc(res_sz + 1)) == NULL)
 		return GIT_ENOMEM;
@@ -111,5 +115,6 @@ int git__delta_apply(
 fail:
 	git__free(out->data);
 	out->data = NULL;
-	return git__throw(GIT_ERROR, "Failed to apply delta");
+	giterr_set(GITERR_INVALID, "Failed to apply delta");
+	return -1;
 }

src/filter.c

@@ -95,8 +95,8 @@ int git_filters_load(git_vector *filters, git_repository *repo, const char *path
 		if (error < GIT_SUCCESS)
 			return error;
 	} else {
-		return git__throw(GIT_ENOTIMPLEMENTED,
-			"Worktree filters are not implemented yet");
+		giterr_set(GITERR_INVALID, "Worktree filters are not implemented yet");
+		return GIT_ENOTIMPLEMENTED;
 	}
 
 	return (int)filters->length;

src/object.c

@@ -68,7 +68,8 @@ static int create_object(git_object **object_out, git_otype type)
 		break;
 
 	default:
-		return git__throw(GIT_EINVALIDTYPE, "The given type is invalid");
+		giterr_set(GITERR_INVALID, "The given type is invalid");
+		return -1;
 	}
 
 	object->type = type;
@@ -92,8 +93,7 @@ int git_object_lookup_prefix(
 	assert(repo && object_out && id);
 
 	if (len < GIT_OID_MINPREFIXLEN)
-		return git__throw(GIT_EAMBIGUOUS,
-			"Failed to lookup object. Prefix length is lower than %d.", GIT_OID_MINPREFIXLEN);
+		return GIT_EAMBIGUOUS;
 
 	error = git_repository_odb__weakptr(&odb, repo);
 	if (error < GIT_SUCCESS)
@@ -110,13 +110,12 @@ int git_object_lookup_prefix(
 		if (object != NULL) {
 			if (type != GIT_OBJ_ANY && type != object->type) {
 				git_object_free(object);
-				return git__throw(GIT_EINVALIDTYPE,
-					"Failed to lookup object. "
-					"The given type does not match the type on the ODB");
+				giterr_set(GITERR_INVALID, "The given type does not match the type in ODB");
+				return -1;
 			}
 
 			*object_out = object;
-			return GIT_SUCCESS;
+			return 0;
 		}
 
 		/* Object was not found in the cache, let's explore the backends.
@@ -147,18 +146,19 @@ int git_object_lookup_prefix(
 		error = git_odb_read_prefix(&odb_obj, odb, &short_oid, len);
 	}
 
-	if (error < GIT_SUCCESS)
-		return git__rethrow(error, "Failed to lookup object");
+	if (error < 0)
+		return -1;
 
 	if (type != GIT_OBJ_ANY && type != odb_obj->raw.type) {
 		git_odb_object_free(odb_obj);
-		return git__throw(GIT_EINVALIDTYPE, "Failed to lookup object. The given type does not match the type on the ODB");
+		giterr_set(GITERR_INVALID, "The given type does not match the type on the ODB");
+		return -1;
 	}
 
 	type = odb_obj->raw.type;
 
-	if ((error = create_object(&object, type)) < GIT_SUCCESS)
-		return git__rethrow(error, "Failed to lookup object");
+	if (create_object(&object, type) < 0)
+		return -1;
 
 	/* Initialize parent object */
 	git_oid_cpy(&object->cached.oid, &odb_obj->cached.oid);
@@ -187,13 +187,13 @@ int git_object_lookup_prefix(
 
 	git_odb_object_free(odb_obj);
 
-	if (error < GIT_SUCCESS) {
+	if (error < 0) {
 		git_object__free(object);
-		return git__rethrow(error, "Failed to lookup object");
+		return -1;
 	}
 
 	*object_out = git_cache_try_store(&repo->objects, object);
-	return GIT_SUCCESS;
+	return 0;
 }
 
 int git_object_lookup(git_object **object_out, git_repository *repo, const git_oid *id, git_otype type) {

src/refspec.c

@@ -25,24 +25,21 @@ int git_refspec_parse(git_refspec *refspec, const char *str)
 	delim = strchr(str, ':');
 	if (delim == NULL) {
 		refspec->src = git__strdup(str);
-		if (refspec->src == NULL)
-			return GIT_ENOMEM;
-
-		return GIT_SUCCESS;
+		GITERR_CHECK_ALLOC(refspec->src);
+		return 0;
 	}
 
 	refspec->src = git__strndup(str, delim - str);
-	if (refspec->src == NULL)
-		return GIT_ENOMEM;
+	GITERR_CHECK_ALLOC(refspec->src);
 
 	refspec->dst = git__strdup(delim + 1);
 	if (refspec->dst == NULL) {
 		git__free(refspec->src);
 		refspec->src = NULL;
-		return GIT_ENOMEM;
+		return -1;
 	}
 
-	return GIT_SUCCESS;
+	return 0;
 }
 
 const char *git_refspec_src(const git_refspec *refspec)
@@ -65,8 +62,10 @@ int git_refspec_transform(char *out, size_t outlen, const git_refspec *spec, con
 	size_t baselen, namelen;
 
 	baselen = strlen(spec->dst);
-	if (outlen <= baselen)
-		return git__throw(GIT_EINVALIDREFNAME, "Reference name too long");
+	if (outlen <= baselen) {
+		giterr_set(GITERR_INVALID, "Reference name too long");
+		return GIT_ESHORTBUFFER;
+	}
 
 	/*
 	 * No '*' at the end means that it's mapped to one specific local
@@ -74,7 +73,7 @@ int git_refspec_transform(char *out, size_t outlen, const git_refspec *spec, con
 	 */
 	if (spec->dst[baselen - 1] != '*') {
 		memcpy(out, spec->dst, baselen + 1); /* include '\0' */
-		return GIT_SUCCESS;
+		return 0;
 	}
 
 	/* There's a '*' at the end, so remove its length */
@@ -85,32 +84,34 @@ int git_refspec_transform(char *out, size_t outlen, const git_refspec *spec, con
 
 	namelen = strlen(name);
 
-	if (outlen <= baselen + namelen)
-		return git__throw(GIT_EINVALIDREFNAME, "Reference name too long");
+	if (outlen <= baselen + namelen) {
+		giterr_set(GITERR_INVALID, "Reference name too long");
+		return GIT_ESHORTBUFFER;
+	}
 
 	memcpy(out, spec->dst, baselen);
 	memcpy(out + baselen, name, namelen + 1);
 
-	return GIT_SUCCESS;
+	return 0;
 }
 
 int git_refspec_transform_r(git_buf *out, const git_refspec *spec, const char *name)
 {
-	if (git_buf_sets(out, spec->dst) < GIT_SUCCESS)
-		return GIT_ENOMEM;
+	if (git_buf_sets(out, spec->dst) < 0)
+		return -1;
 
 	/*
 	 * No '*' at the end means that it's mapped to one specific local
 	 * branch, so no actual transformation is needed.
 	 */
 	if (out->size > 0 && out->ptr[out->size - 1] != '*')
-		return GIT_SUCCESS;
+		return 0;
 
 	git_buf_truncate(out, out->size - 1); /* remove trailing '*' */
 	git_buf_puts(out, name + strlen(spec->src) - 1);
 
 	if (git_buf_oom(out))
-		return GIT_ENOMEM;
+		return -1;
 
 	return 0;
 }

tests-clar/object/tree/frompath.c

@@ -40,6 +40,12 @@ static void assert_tree_from_path(git_tree *root, const char *path, int expected
 	git_tree_free(containing_tree);
 }
 
+static void assert_tree_from_path_klass(git_tree *root, const char *path, int expected_result, const char *expected_raw_oid)
+{
+	assert_tree_from_path(root, path, GIT_ERROR, expected_raw_oid);
+	cl_assert(git_error_last()->klass == expected_result);
+}
+
 void test_object_tree_frompath__retrieve_tree_from_path_to_treeentry(void)
 {
 	/* Will return self if given a one path segment... */
@@ -66,10 +72,10 @@ void test_object_tree_frompath__fail_when_processing_an_unknown_tree_segment(voi
 
 void test_object_tree_frompath__fail_when_processing_an_invalid_path(void)
 {
-	assert_tree_from_path(tree, "/", GIT_EINVALIDPATH, NULL);
-	assert_tree_from_path(tree, "/ab", GIT_EINVALIDPATH, NULL);
-	assert_tree_from_path(tree, "/ab/de", GIT_EINVALIDPATH, NULL);
-	assert_tree_from_path(tree, "ab/", GIT_EINVALIDPATH, NULL);
-	assert_tree_from_path(tree, "ab//de", GIT_EINVALIDPATH, NULL);
-	assert_tree_from_path(tree, "ab/de/", GIT_EINVALIDPATH, NULL);
+	assert_tree_from_path_klass(tree, "/", GITERR_INVALID, NULL);
+	assert_tree_from_path_klass(tree, "/ab", GITERR_INVALID, NULL);
+	assert_tree_from_path_klass(tree, "/ab/de", GITERR_INVALID, NULL);
+	assert_tree_from_path_klass(tree, "ab/", GITERR_INVALID, NULL);
+	assert_tree_from_path_klass(tree, "ab//de", GITERR_INVALID, NULL);
+	assert_tree_from_path_klass(tree, "ab/de/", GITERR_INVALID, NULL);
 }