API Linter

API linter checks APIs defined in protobuf files. It follows Google API Design Guide.

Requirements

• Install git from https://git-scm.com;
• Install go from https://golang.org/doc/install;
• Install protoc by following this guide;

Installation

• Install api-linter using go get:

go get -u github.com/googleapis/api-linter/cmd/api-linter

This installs api-linter into your local Go binary folder $HOME/go/bin. Ensure that your operating system's PATH contains the folder.

Usage

Run api-linter help to see the usage. Or run api-linter help checkproto to see how to check API protobuf files:

NAME:
   api-linter checkproto - Check protobuf files that define an API

USAGE:
   api-linter checkproto [command options] files...

OPTIONS:
   --cfg value          configuration file path
   --out value          output file path (default: stdout)
   --fmt value          output format (default: "yaml")
   --protoc value       protocol compiler path (default: "protoc")
   --proto_path value   the directory in which for protoc to search for imports (default: ".")

See this example.

Rule Configuration

The linter contains a list of core rules, and by default, they are all enabled. However, one can disable a rule by using a configuration file or in-file(line) comments.

Disable a rule using a configuration file

Example:

Disable rule core::proto_version for any .proto files.

[
   {
      "included_paths": ["**/*.proto"],
      "rule_configs": {
         "core::proto_version": {"status": "disabled"}
      }
   }
]

Disable a rule using in-file(line) comments

Example:

• Disable rule core::naming_formats::field_names entirely for a file in the file comments.

// file comments
// (-- api-linter: core::naming_formats::field_names=disabled --)

syntax = "proto3";

package google.api.linter.examples;

message Example {
    string badFieldName = 1;
    string anotherBadFieldName = 2;
}

• Disable rule core::naming_formats::field_names only for a field in its leading or trailing comments.

syntax = "proto3";

package google.api.linter.examples;

message Example {
    string badFieldName = 1;
    // leading comments for field `anotherBadFieldName`
    // (-- api-linter: core::naming_formats::field_names=disabled --)
    string anotherBadFieldName = 2; // trailing comments (-- api-linter: core::naming_formats::field_names=disabled --)
}

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

Please make sure to update tests as appropriate.

License

Apache License 2.0