// Copyright 2025 The Pigweed Authors
//
// 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
//
//     https://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 pw.build.proto;

import "google/protobuf/any.proto";

// A distinct build configuration.
//
// Build configurations are expected to be hermetic, meaning that if the
// same build configuration is reused across multiple builds it should be safe
// to reuse the same build directory.
message BuildConfig {
  // Descriptive name for this build configuration.
  // This is used as an ID and must be unique across a workflow configuration.
  string name = 1;

  // A help string that describes this configuration.
  string description = 2;

  // The name of the driver that should be used for this build configuration.
  string build_type = 3;

  // Arguments that should be passed to underlying build system.
  repeated string args = 4;

  // Environment variables unique to this build configuration.
  map<string, string> env = 5;

  // Driver-specific options.
  // This is forwarded to the driver for the respective build_type, and is used
  // to configure options that are more complex then simply passing additional
  // flags.
  google.protobuf.Any driver_options = 6;
}

// A discrete build.
message Build {
  // A human-readable name for this build.
  // This is the name that users will write out to trigger this build.
  string name = 1;

  // A help string that describes this build.
  string description = 2;

  // The configuration that should be used when building the targets specified
  // by this build.
  oneof config {
    // The ID/name of a shared BuildConfig.
    string use_config = 3;
    // A unique one-off config.
    BuildConfig build_config = 4;
  }

  // Target patterns that should be built/tested by this configuration.
  repeated string targets = 5;

  // A shortcut subcommand that launches this build. For example:
  //
  //   # Given rerun_shortcut=build_foo, the following subcommand will be
  //   # available:
  //   $ ./pw build_foo
  //
  // If this is not set, the assumed way to run this build is `build [name]`.
  string rerun_shortcut = 6;
}

// A runnable tool.
message Tool {
  // The name that is used to launch this tool.
  string name = 1;

  // A descriptive help string for this tool.
  string description = 2;

  // The configuration that this tool will be built under.
  oneof config {
    // The ID/name of a shared BuildConfig.
    string use_config = 3;
    // A unique one-off config.
    BuildConfig build_config = 4;
  }

  // Target to build and launch.
  string target = 5;

  enum Type {
    // A tool that may produce output, mutate the world, require realtime user
    // interaction, or have side-effects that affect hermeticity of subsequent
    // actions.
    // By default, all tools are assumed to be of this kind.
    GENERAL = 0;

    // A runnable tool that exists *purely* to surface information.
    // e.g. linters, code style checks, etc.
    // Theses tools may NOT:
    //   - Modify files.
    //   - Upload/download arbitrary files.
    //   - Modify local system state.
    //   - Interact with attached devices.
    ANALYZER = 1;
  }

  // The type of tool.
  Type type = 6;

  // Arguments to inject that make a Tool safe to run as an ANALYZER.
  // These are not injected when this tool is normally launched, only when
  // the tool is launched in a way that requires behavior that doesn't affect
  // hermeticity.
  repeated string analyzer_friendly_args = 7;

  // A shortcut subcommand that launches this tool. For example:
  //
  //   # Given rerun_shortcut=check_formatting, the following subcommand will be
  //   # available:
  //   $ ./pw check_formatting
  //
  // Note that this always launches the analyzer version of this tool, and is
  // unsupported for other tool types.
  // If this is not set, the assumed way to run this analyzer is `check [name]`.
  string rerun_shortcut = 8;
}

// A series of builds and analyzers that are launchable as a group to
// accelerate workflows.
//
// The builds and analyzers listed in this workflow *may* be ran in order,
// but no guarantee is provided. Builds and analyzers listed here should
// behave predictably and deterministically when run out-of-order.
// Having order-based dependencies in a workflow is considered an antipattern.
message TaskGroup {
  // The name used to launch this workflow.
  string name = 1;

  // A descriptive help string for this tool.
  string description = 2;

  // The name of builds that should be performed as part of this workflow.
  repeated string builds = 3;

  // The name of analyzers that should be run as part of this workflow.
  //
  // Note: Only ANALYZER tools, or tools that have analyzer_friendly_args
  // may be listed here.
  repeated string analyzers = 4;
}

// These options are used when loading ProtoJSON files since JSON doesn't
// have any inherent mechanism for sharing/reusing snippets from other files.
message ConfigLoaderOptions {
  message ImportedConfigFragment {
    // The file to import entries from.
    // This path is the result of strip/import_prefix of any dependent
    // configurations.
    string config_path = 1;

    // The `name`s that should be imported into the current config.
    // Note that all transitive requirements are also imported. i.e.
    // importing a LaunchableWorkflow will import all referenced builds,
    // analyzers, build configs, etc.
    repeated string imported_ids = 2;
  }

  // Config fragments that should be imported from another externally-provided
  // file.
  repeated ImportedConfigFragment imports = 1;
}

// The launcher config.
message WorkflowSuite {
  ConfigLoaderOptions loader_options = 1;
  repeated BuildConfig configs = 2;
  repeated Build builds = 3;
  repeated Tool tools = 4;
  repeated TaskGroup groups = 5;
}