go.uber.org/yarpc@v1.72.1/internal/service-test/config.go (about)

     1  // Copyright (c) 2022 Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  package main
    22  
    23  import (
    24  	"errors"
    25  	"fmt"
    26  	"io/ioutil"
    27  	"os"
    28  
    29  	"gopkg.in/yaml.v2"
    30  )
    31  
    32  var (
    33  	errConfigNil       = errors.New("config nil")
    34  	errConfigRunNotSet = errors.New("config run not set")
    35  )
    36  
    37  type config struct {
    38  	RequiredEnvVars []string     `json:"required_env_vars,omitempty" yaml:"required_env_vars,omitempty"`
    39  	Run             []*cmdConfig `json:"run,omitempty" yaml:"run,omitempty"`
    40  }
    41  
    42  type cmdConfig struct {
    43  	Command string `json:"command,omitempty" yaml:"command,omitempty"`
    44  	SleepMs int    `json:"sleep_ms,omitempty" yaml:"sleep_ms,omitempty"`
    45  	Input   string `json:"input,omitempty" yaml:"input,omitempty"`
    46  	Output  string `json:"output,omitempty" yaml:"output,omitempty"`
    47  }
    48  
    49  func newConfig(configFilePath string) (*config, error) {
    50  	data, err := ioutil.ReadFile(configFilePath)
    51  	if err != nil {
    52  		return nil, err
    53  	}
    54  	config := &config{}
    55  	if err := yaml.Unmarshal(data, config); err != nil {
    56  		return nil, err
    57  	}
    58  	if err := config.validate(); err != nil {
    59  		return nil, err
    60  	}
    61  	return config, nil
    62  }
    63  
    64  func (c *config) Cmds(dir string, debug bool) ([]*cmd, error) {
    65  	cmds := make([]*cmd, 0, len(c.Run))
    66  	for _, cmdConfig := range c.Run {
    67  		cmd, err := newCmd(cmdConfig, dir, debug)
    68  		if err != nil {
    69  			return nil, err
    70  		}
    71  		cmds = append(cmds, cmd)
    72  	}
    73  	return cmds, nil
    74  }
    75  
    76  func (c *config) validate() error {
    77  	if c == nil {
    78  		return errConfigNil
    79  	}
    80  	if len(c.Run) == 0 {
    81  		return errConfigRunNotSet
    82  	}
    83  	for _, requiredEnvVar := range c.RequiredEnvVars {
    84  		if os.Getenv(requiredEnvVar) == "" {
    85  			return fmt.Errorf("environment variable %s must be set", requiredEnvVar)
    86  		}
    87  	}
    88  	return nil
    89  }