workspace.go

// Copyright 2020-2023 Buf Technologies, Inc.
//
// 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.

package bufmodule

import (
	"context"

	"github.com/bufbuild/buf/private/bufpkg/bufmodule/bufmoduleref"
	"github.com/bufbuild/buf/private/pkg/storage"
)

type workspace struct {
	// bufmoduleref.ModuleIdentity -> bufmodule.Module
	namedModules map[string]Module
	allModules   []Module
}

func newWorkspace(
	ctx context.Context,
	namedModules map[string]Module,
	allModules []Module,
) (*workspace, error) {
	pathToExternalPaths := make(map[string][]string)
	for _, module := range allModules {
		fileInfos, err := module.SourceFileInfos(ctx)
		if err != nil {
			return nil, err
		}
		for _, fileInfo := range fileInfos {
			pathToExternalPaths[fileInfo.Path()] = append(pathToExternalPaths[fileInfo.Path()], fileInfo.ExternalPath())
		}
	}
	for path, externalPaths := range pathToExternalPaths {
		// Will be >1 even if the externalPaths are equal, we mostly care about the count
		if len(externalPaths) > 1 {
			return nil, storage.NewErrExistsMultipleLocations(path, externalPaths...)
		}
	}
	return &workspace{
		namedModules: namedModules,
		allModules:   allModules,
	}, nil
}

func (w *workspace) GetModule(moduleIdentity bufmoduleref.ModuleIdentity) (Module, bool) {
	module, ok := w.namedModules[moduleIdentity.IdentityString()]
	return module, ok
}

func (w *workspace) GetModules() []Module {
	return w.allModules
}