97 lines
1.6 KiB
Go
97 lines
1.6 KiB
Go
package main
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import (
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"flag"
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"fmt"
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"io"
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"os"
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yaml "gopkg.in/yaml.v3"
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)
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const (
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defaultPort = 7099
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defaultInstanceName = "BBJ"
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defaultHost = "127.0.0.1"
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)
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type Config struct {
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Admins []string
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Port int
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Host string
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InstanceName string `yaml:"instance_name"`
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AllowAnon bool
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Debug bool
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}
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type iostreams struct {
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Err io.Writer
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Out io.Writer
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}
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type Opts struct {
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ConfigPath string
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IO iostreams
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}
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func main() {
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var configFlag = flag.String("config", "config.yml", "A path to a config file.")
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flag.Parse()
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opts := Opts{
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ConfigPath: *configFlag,
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IO: iostreams{
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Err: os.Stderr,
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Out: os.Stdout,
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},
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}
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err := _main(opts)
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if err != nil {
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fmt.Fprintf(os.Stderr, "failed: %s", err)
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}
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}
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func _main(opts Opts) error {
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cfg, err := parseConfig(opts.ConfigPath)
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if err != nil {
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fmt.Fprintf(os.Stderr, "could not read config file '%s'", opts.ConfigPath)
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os.Exit(1)
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}
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fmt.Printf("DBG %#v\n", cfg.InstanceName)
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return nil
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}
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func parseConfig(configPath string) (*Config, error) {
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cfgBytes, err := os.ReadFile(configPath)
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if err != nil {
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return nil, fmt.Errorf("failed to read config file: %w", err)
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}
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fmt.Printf("DBG %#v\n", string(cfgBytes))
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var cfg Config
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if err := yaml.Unmarshal(cfgBytes, &cfg); err != nil {
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return nil, fmt.Errorf("failed to parse config: %w", err)
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}
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fmt.Printf("DBG %#v\n", cfg)
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if cfg.Port == 0 {
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cfg.Port = defaultPort
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}
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if cfg.InstanceName == "" {
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cfg.InstanceName = defaultInstanceName
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}
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if cfg.Host == "" {
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cfg.Host = defaultHost
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}
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return &cfg, nil
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}
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