harness-drone/plugin/converter/combine.go

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2019-09-03 06:05:30 +00:00
// Copyright 2019 Drone IO, 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 converter
import (
"context"
"github.com/drone/drone/core"
)
// Combine combines the conversion services, provision support
// for multiple conversion utilities.
func Combine(services ...core.ConvertService) core.ConvertService {
return &combined{services}
}
type combined struct {
sources []core.ConvertService
}
func (c *combined) Convert(ctx context.Context, req *core.ConvertArgs) (*core.Config, error) {
for _, source := range c.sources {
config, err := source.Convert(ctx, req)
if err != nil {
return nil, err
}
if config == nil {
continue
}
if config.Data == "" {
continue
}
return config, nil
}
return req.Config, nil
}