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// Copyright 2017 Google Inc. All Rights Reserved.
//
// 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.
// gnostic can be extended with plugins.
// A plugin is uset a program that reads a Request from stdin
// and writes a Response to stdout.
//
// A plugin executable needs only to be placed somewhere in the path. The
// plugin should be named "gnostic_$NAME", and will then be used when the
// flag "--${NAME}_out" is passed to gnostic.
syntax = "proto3";
import "google/protobuf/any.proto";
package gnostic.plugin.v1;
// This option lets the proto compiler generate Java code inside the package
// name (see below) instead of inside an outer class. It creates a simpler
// developer experience by reducing one-level of name nesting and be
// consistent with most programming languages that don't support outer classes.
option java_multiple_files = true;
// The Java outer classname should be the filename in UpperCamelCase. This
// class is only used to hold proto descriptor, so developers don't need to
// work with it directly.
option java_outer_classname = "GnosticPlugin";
// The Java package name must be proto package name with proper prefix.
option java_package = "org.gnostic.v1";
// A reasonable prefix for the Objective-C symbols generated from the package.
// It should at a minimum be 3 characters long, all uppercase, and convention
// is to use an abbreviation of the package name. Something short, but
// hopefully unique enough to not conflict with things that may come along in
// the future. 'GPB' is reserved for the protocol buffer implementation itself.
//
option objc_class_prefix = "GNO";
// The version number of gnostic.
message Version {
int32 major = 1;
int32 minor = 2;
int32 patch = 3;
// A suffix for alpha, beta or rc release, e.g., "alpha-1", "rc2". It should
// be empty for mainline stable releases.
string suffix = 4;
}
// A parameter passed to the plugin from (or through) gnostic.
message Parameter {
// The name of the parameter as specified in the option string
string name = 1;
// The parameter value as specified in the option string
string value = 2;
}
// An encoded Request is written to the plugin's stdin.
message Request {
// filename or URL of the original source document
string source_name = 1;
// Output path specified in the plugin invocation.
string output_path = 2;
// Plugin parameters parsed from the invocation string.
repeated Parameter parameters = 3;
// The version number of gnostic.
Version compiler_version = 4;
// API models
repeated google.protobuf.Any models = 5;
}
// Plugins can return messages to be collated and reported by gnostic.
message Message {
enum Level {
UNKNOWN = 0;
INFO = 1;
WARNING = 2;
ERROR = 3;
FATAL = 4;
}
// message severity
Level level = 1;
// a unique message identifier
string code = 2;
// message text
string text = 3;
// an associated key path in an API description
repeated string keys = 4;
}
message Messages {
repeated Message messages = 1;
}
// The plugin writes an encoded Response to stdout.
message Response {
// Error message. If non-empty, the plugin failed.
// The plugin process should exit with status code zero
// even if it reports an error in this way.
//
// This should be used to indicate errors which prevent the plugin from
// operating as intended. Errors which indicate a problem in gnostic
// itself -- such as the input Document being unparseable -- should be
// reported by writing a message to stderr and exiting with a non-zero
// status code.
repeated string errors = 1;
// file output, each file will be written by gnostic to an appropriate location.
repeated File files = 2;
// informational messages to be collected and reported by gnostic.
repeated Message messages = 3;
}
// File describes a file generated by a plugin.
message File {
// name of the file
string name = 1;
// data to be written to the file
bytes data = 2;
}