github.com/pingcap/ticdc@v0.0.0-20220526033649-485a10ef2652/tests/util/config.go (about)

     1  // Copyright 2020 PingCAP, Inc.
     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  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  package util
    15  
    16  import (
    17  	"flag"
    18  	"fmt"
    19  
    20  	"github.com/BurntSushi/toml"
    21  	"github.com/pingcap/errors"
    22  )
    23  
    24  // NewConfig creates a new config.
    25  func NewConfig() *Config {
    26  	cfg := &Config{}
    27  	cfg.FlagSet = flag.NewFlagSet("ticdcTest", flag.ContinueOnError)
    28  	fs := cfg.FlagSet
    29  
    30  	fs.StringVar(&cfg.configFile, "config", "", "Config file")
    31  	fs.IntVar(&cfg.WorkerCount, "c", 1, "parallel worker count")
    32  	fs.IntVar(&cfg.JobCount, "n", 1, "total job count")
    33  	fs.IntVar(&cfg.Batch, "b", 1, "insert batch commit count")
    34  	fs.StringVar(&cfg.LogLevel, "L", "info", "log level: debug, info, warn, error, fatal")
    35  
    36  	return cfg
    37  }
    38  
    39  // Config is the configuration.
    40  type Config struct {
    41  	*flag.FlagSet `json:"-"`
    42  
    43  	LogLevel string `toml:"log-level" json:"log-level"`
    44  
    45  	WorkerCount int `toml:"worker-count" json:"worker-count"`
    46  
    47  	JobCount int `toml:"job-count" json:"job-count"`
    48  
    49  	Batch int `toml:"batch" json:"batch"`
    50  
    51  	PDAddr string `toml:"pd" json:"pd"`
    52  
    53  	SourceDBCfg []DBConfig `toml:"source-db" json:"source-db"`
    54  
    55  	TargetDBCfg DBConfig `toml:"target-db" json:"target-db"`
    56  
    57  	configFile string
    58  }
    59  
    60  // Parse parses flag definitions from the argument list.
    61  func (c *Config) Parse(arguments []string) error {
    62  	// Parse first to get config file.
    63  	err := c.FlagSet.Parse(arguments)
    64  	if err != nil {
    65  		return errors.Trace(err)
    66  	}
    67  
    68  	// Load config file if specified.
    69  	if c.configFile != "" {
    70  		err = c.configFromFile(c.configFile)
    71  		if err != nil {
    72  			return errors.Trace(err)
    73  		}
    74  	}
    75  
    76  	// Parse again to replace with command line options.
    77  	err = c.FlagSet.Parse(arguments)
    78  	if err != nil {
    79  		return errors.Trace(err)
    80  	}
    81  
    82  	if len(c.FlagSet.Args()) != 0 {
    83  		return errors.Errorf("'%s' is an invalid flag", c.FlagSet.Arg(0))
    84  	}
    85  
    86  	return nil
    87  }
    88  
    89  func (c *Config) String() string {
    90  	if c == nil {
    91  		return "<nil>"
    92  	}
    93  	return fmt.Sprintf("Config(%+v)", *c)
    94  }
    95  
    96  // configFromFile loads config from file.
    97  func (c *Config) configFromFile(path string) error {
    98  	_, err := toml.DecodeFile(path, c)
    99  	return errors.Trace(err)
   100  }