/
config.go
89 lines (80 loc) · 2.66 KB
/
config.go
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// 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 main
import (
"errors"
"fmt"
"io/ioutil"
"os"
"gopkg.in/yaml.v2"
)
var (
errConfigNil = errors.New("config nil")
errConfigRunNotSet = errors.New("config run not set")
)
type config struct {
RequiredEnvVars []string `json:"required_env_vars,omitempty" yaml:"required_env_vars,omitempty"`
Run []*cmdConfig `json:"run,omitempty" yaml:"run,omitempty"`
}
type cmdConfig struct {
Command string `json:"command,omitempty" yaml:"command,omitempty"`
SleepMs int `json:"sleep_ms,omitempty" yaml:"sleep_ms,omitempty"`
Input string `json:"input,omitempty" yaml:"input,omitempty"`
Output string `json:"output,omitempty" yaml:"output,omitempty"`
}
func newConfig(configFilePath string) (*config, error) {
data, err := ioutil.ReadFile(configFilePath)
if err != nil {
return nil, err
}
config := &config{}
if err := yaml.Unmarshal(data, config); err != nil {
return nil, err
}
if err := config.validate(); err != nil {
return nil, err
}
return config, nil
}
func (c *config) Cmds(dir string, debug bool) ([]*cmd, error) {
cmds := make([]*cmd, 0, len(c.Run))
for _, cmdConfig := range c.Run {
cmd, err := newCmd(cmdConfig, dir, debug)
if err != nil {
return nil, err
}
cmds = append(cmds, cmd)
}
return cmds, nil
}
func (c *config) validate() error {
if c == nil {
return errConfigNil
}
if len(c.Run) == 0 {
return errConfigRunNotSet
}
for _, requiredEnvVar := range c.RequiredEnvVars {
if os.Getenv(requiredEnvVar) == "" {
return fmt.Errorf("environment variable %s must be set", requiredEnvVar)
}
}
return nil
}