kraken

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// Copyright (c) 2016-2019 Uber Technologies, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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//     http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package lib
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import (
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	"crypto/tls"
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	"fmt"
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	"io/ioutil"
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	"github.com/uber/kraken/utils/httputil"
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	"gopkg.in/yaml.v2"
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)
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// ReadTLSFile reads config file in path and returns *tls.Config.
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// It returns nil when path is nil.
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func ReadTLSFile(path *string) (*tls.Config, error) {
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	if path == nil {
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		return nil, nil
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	}
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	data, err := ioutil.ReadFile(*path)
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	if err != nil {
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		return nil, fmt.Errorf("read tls config: %s", err)
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	}
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	var config httputil.TLSConfig
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	if err := yaml.Unmarshal(data, &config); err != nil {
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		return nil, fmt.Errorf("unmarshal tls config: %s", err)
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	}
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	tls, err := config.BuildClient()
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	if err != nil {
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		return nil, fmt.Errorf("build tls client: %s", err)
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	}
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	return tls, nil
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}
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