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// Copyright 2018 Google LLC.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
syntax = "proto3";
package google.api.expr.v1alpha1;
import "google/api/expr/v1alpha1/checked.proto";
import "google/api/expr/v1alpha1/eval.proto";
import "google/api/expr/v1alpha1/syntax.proto";
import "google/rpc/status.proto";
option cc_enable_arenas = true;
option go_package = "google.golang.org/genproto/googleapis/api/expr/v1alpha1;expr";
option java_multiple_files = true;
option java_outer_classname = "ConformanceServiceProto";
option java_package = "com.google.api.expr.v1alpha1";
// Access a CEL implementation from another process or machine.
// A CEL implementation is decomposed as a parser, a static checker,
// and an evaluator. Every CEL implementation is expected to provide
// a server for this API. The API will be used for conformance testing
// and other utilities.
service ConformanceService {
// Transforms CEL source text into a parsed representation.
rpc Parse(ParseRequest) returns (ParseResponse) {}
// Runs static checks on a parsed CEL representation and return
// an annotated representation, or a set of issues.
rpc Check(CheckRequest) returns (CheckResponse) {}
// Evaluates a parsed or annotation CEL representation given
// values of external bindings.
rpc Eval(EvalRequest) returns (EvalResponse) {}
}
// Request message for the Parse method.
message ParseRequest {
// Required. Source text in CEL syntax.
string cel_source = 1;
// Tag for version of CEL syntax, for future use.
string syntax_version = 2;
// File or resource for source text, used in
// [SourceInfo][google.api.expr.v1alpha1.SourceInfo].
string source_location = 3;
// Prevent macro expansion. See "Macros" in Language Defiinition.
bool disable_macros = 4;
}
// Response message for the Parse method.
message ParseResponse {
// The parsed representation, or unset if parsing failed.
ParsedExpr parsed_expr = 1;
// Any number of issues with [StatusDetails][] as the details.
repeated google.rpc.Status issues = 2;
}
// Request message for the Check method.
message CheckRequest {
// Required. The parsed representation of the CEL program.
ParsedExpr parsed_expr = 1;
// Declarations of types for external variables and functions.
// Required if program uses external variables or functions
// not in the default environment.
repeated Decl type_env = 2;
// The protocol buffer context. See "Name Resolution" in the
// Language Definition.
string container = 3;
// If true, use only the declarations in
// [type_env][google.api.expr.v1alpha1.CheckRequest.type_env]. If false
// (default), add declarations for the standard definitions to the type
// environment. See "Standard Definitions" in the Language Definition.
bool no_std_env = 4;
}
// Response message for the Check method.
message CheckResponse {
// The annotated representation, or unset if checking failed.
CheckedExpr checked_expr = 1;
// Any number of issues with [StatusDetails][] as the details.
repeated google.rpc.Status issues = 2;
}
// Request message for the Eval method.
message EvalRequest {
// Required. Either the parsed or annotated representation of the CEL program.
oneof expr_kind {
// Evaluate based on the parsed representation.
ParsedExpr parsed_expr = 1;
// Evaluate based on the checked representation.
CheckedExpr checked_expr = 2;
}
// Bindings for the external variables. The types SHOULD be compatible
// with the type environment in
// [CheckRequest][google.api.expr.v1alpha1.CheckRequest], if checked.
map<string, ExprValue> bindings = 3;
// SHOULD be the same container as used in
// [CheckRequest][google.api.expr.v1alpha1.CheckRequest], if checked.
string container = 4;
}
// Response message for the Eval method.
message EvalResponse {
// The execution result, or unset if execution couldn't start.
ExprValue result = 1;
// Any number of issues with [StatusDetails][] as the details.
// Note that CEL execution errors are reified into
// [ExprValue][google.api.expr.v1alpha1.ExprValue]. Nevertheless, we'll allow
// out-of-band issues to be raised, which also makes the replies more regular.
repeated google.rpc.Status issues = 2;
}
// Warnings or errors in service execution are represented by
// [google.rpc.Status][google.rpc.Status] messages, with the following message
// in the details field.
message IssueDetails {
// Severities of issues.
enum Severity {
// An unspecified severity.
SEVERITY_UNSPECIFIED = 0;
// Deprecation issue for statements and method that may no longer be
// supported or maintained.
DEPRECATION = 1;
// Warnings such as: unused variables.
WARNING = 2;
// Errors such as: unmatched curly braces or variable redefinition.
ERROR = 3;
}
// The severity of the issue.
Severity severity = 1;
// Position in the source, if known.
SourcePosition position = 2;
// Expression ID from [Expr][google.api.expr.v1alpha1.Expr], 0 if unknown.
int64 id = 3;
}
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