64 lines
1.6 KiB
Go
64 lines
1.6 KiB
Go
package main
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import (
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"context"
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"errors"
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"flag"
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"fmt"
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"io"
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"os"
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"os/signal"
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"strings"
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"syscall"
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"proxy-pool/internal/config"
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"proxy-pool/internal/controller/bootstrap"
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)
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const configEnvironment = "PROXY_POOL_CONFIG"
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type environmentLookup func(string) string
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type controllerRun func(context.Context, bootstrap.Options) error
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func main() {
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ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
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defer stop()
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os.Exit(execute(ctx, os.Args[1:], os.Getenv, bootstrap.Run, os.Stderr))
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}
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func execute(
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ctx context.Context,
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args []string,
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getenv environmentLookup,
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run controllerRun,
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stderr io.Writer,
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) int {
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flags := flag.NewFlagSet("proxy-controller", flag.ContinueOnError)
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flags.SetOutput(stderr)
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configPath := flags.String("config", "", "configuration file path")
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if err := flags.Parse(args); err != nil {
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if errors.Is(err, flag.ErrHelp) {
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return 0
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}
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return 2
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}
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if flags.NArg() != 0 {
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_, _ = fmt.Fprintln(stderr, "proxy-controller: unexpected positional arguments")
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return 2
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}
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if *configPath == "" && getenv != nil {
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*configPath = getenv(configEnvironment)
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}
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if strings.TrimSpace(*configPath) != *configPath || *configPath == "" || ctx == nil || run == nil {
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_, _ = fmt.Fprintf(stderr, "proxy-controller: -config or %s is required\n", configEnvironment)
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return 2
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}
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err := run(ctx, bootstrap.Options{ConfigPath: *configPath, Resolver: config.OSResolver{}})
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if err == nil || (errors.Is(err, context.Canceled) && ctx.Err() != nil) {
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return 0
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}
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_, _ = fmt.Fprintf(stderr, "proxy-controller: %v\n", err)
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return 1
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}
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