github.com/coreos/rocket@v1.30.1-0.20200224141603-171c416fac02/rkt/config/paths.go (about)

     1  // Copyright 2015 The rkt Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package config
    16  
    17  import (
    18  	"encoding/json"
    19  	"fmt"
    20  	"path/filepath"
    21  )
    22  
    23  type configurablePathsV1 struct {
    24  	Data         string `json:"data"`
    25  	Stage1Images string `json:"stage1-images"`
    26  }
    27  
    28  func init() {
    29  	addParser("paths", "v1", &configurablePathsV1{})
    30  	// Look in 'paths.d' subdir for configs of type paths
    31  	registerSubDir("paths.d", []string{"paths"})
    32  }
    33  
    34  func (p *configurablePathsV1) parse(config *Config, raw []byte) error {
    35  	var dirs configurablePathsV1
    36  	if err := json.Unmarshal(raw, &dirs); err != nil {
    37  		return err
    38  	}
    39  	if dirs.Data != "" {
    40  		if config.Paths.DataDir != "" {
    41  			return fmt.Errorf("data directory is already specified")
    42  		}
    43  		if !filepath.IsAbs(dirs.Data) {
    44  			return fmt.Errorf("data directory must be an absolute path")
    45  		}
    46  		config.Paths.DataDir = dirs.Data
    47  	}
    48  	if dirs.Stage1Images != "" {
    49  		if config.Paths.Stage1ImagesDir != "" {
    50  			return fmt.Errorf("stage1 images directory is already specified")
    51  		}
    52  		if !filepath.IsAbs(dirs.Stage1Images) {
    53  			return fmt.Errorf("stage1 images directory must be an absolute path")
    54  		}
    55  		config.Paths.Stage1ImagesDir = dirs.Stage1Images
    56  	}
    57  
    58  	return nil
    59  }