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from_directory.go
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from_directory.go
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// Copyright (c) 2018 Ashley Jeffs
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package manager
import (
"fmt"
"io/ioutil"
"os"
"path/filepath"
"strings"
"github.com/Jeffail/benthos/lib/stream"
"github.com/Jeffail/benthos/lib/util/text"
yaml "gopkg.in/yaml.v2"
)
//------------------------------------------------------------------------------
// LoadStreamConfigsFromDirectory reads a map of stream ids to configurations
// by walking a directory of .json and .yaml files.
func LoadStreamConfigsFromDirectory(replaceEnvVars bool, dir string) (map[string]stream.Config, error) {
streamMap := map[string]stream.Config{}
dir = filepath.Clean(dir)
if info, err := os.Stat(dir); err != nil {
if os.IsNotExist(err) {
return streamMap, nil
}
return nil, err
} else if !info.IsDir() {
return streamMap, nil
}
err := filepath.Walk(dir, func(path string, info os.FileInfo, werr error) error {
if werr != nil {
return werr
}
if info.IsDir() ||
(!strings.HasSuffix(info.Name(), ".yaml") &&
!strings.HasSuffix(info.Name(), ".json")) {
return nil
}
id := strings.TrimPrefix(path, dir)
id = strings.Trim(id, string(filepath.Separator))
id = strings.Replace(id, string(filepath.Separator), "_", -1)
if strings.HasSuffix(info.Name(), ".yaml") {
id = strings.TrimSuffix(id, ".yaml")
} else {
id = strings.TrimSuffix(id, ".json")
}
if _, exists := streamMap[id]; exists {
return fmt.Errorf("stream id (%v) collision from file: %v", id, path)
}
file, openerr := os.Open(path)
if openerr != nil {
return fmt.Errorf("failed to read stream file '%v': %v", path, openerr)
}
defer file.Close()
streamBytes, readerr := ioutil.ReadAll(file)
if readerr != nil {
return readerr
}
if replaceEnvVars {
streamBytes = text.ReplaceEnvVariables(streamBytes)
}
conf := stream.NewConfig()
if readerr = yaml.Unmarshal(streamBytes, &conf); readerr != nil {
return readerr
}
streamMap[id] = conf
return nil
})
return streamMap, err
}
//------------------------------------------------------------------------------