mirror of
https://github.com/caddyserver/caddy.git
synced 2024-12-28 14:43:48 +03:00
89 lines
2 KiB
Go
89 lines
2 KiB
Go
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package caddycmd
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import (
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"bytes"
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"flag"
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"fmt"
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"io"
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"io/ioutil"
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"log"
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"net"
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"os"
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"runtime/debug"
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)
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// Main executes the main function of the caddy command.
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func Main() {
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if len(os.Args) <= 1 {
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fmt.Println(usageString())
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return
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}
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subcommand, ok := commands[os.Args[1]]
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if !ok {
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fmt.Printf("%q is not a valid command\n", os.Args[1])
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os.Exit(2)
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}
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if exitCode, err := subcommand(); err != nil {
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log.Println(err)
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os.Exit(exitCode)
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}
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}
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// commandFunc is a function that executes
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// a subcommand. It returns an exit code and
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// any associated error.
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type commandFunc func() (int, error)
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var commands = map[string]commandFunc{
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"start": cmdStart,
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"stop": cmdStop,
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"run": cmdRun,
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"version": cmdVersion,
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"list-modules": cmdListModules,
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"environ": cmdEnviron,
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}
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func usageString() string {
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buf := new(bytes.Buffer)
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buf.WriteString("usage: caddy <command> [<args>]")
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flag.CommandLine.SetOutput(buf)
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flag.CommandLine.PrintDefaults()
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return buf.String()
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}
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// handlePingbackConn reads from conn and ensures it matches
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// the bytes in expect, or returns an error if it doesn't.
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func handlePingbackConn(conn net.Conn, expect []byte) error {
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defer conn.Close()
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confirmationBytes, err := ioutil.ReadAll(io.LimitReader(conn, 32))
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if err != nil {
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return err
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}
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if !bytes.Equal(confirmationBytes, expect) {
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return fmt.Errorf("wrong confirmation: %x", confirmationBytes)
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}
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return nil
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}
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// getGoBuildModule returns the build info of Caddy
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// from debug.BuildInfo (requires Go modules). If
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// no version information is available, a non-nil
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// value will still be returned, but with an
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// unknown version.
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func getGoBuildModule() *debug.Module {
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bi, ok := debug.ReadBuildInfo()
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if ok {
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// The recommended way to build Caddy involves
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// creating a separate main module, which
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// TODO: track related Go issue: https://github.com/golang/go/issues/29228
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for _, mod := range bi.Deps {
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if mod.Path == "github.com/mholt/caddy" {
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return mod
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}
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}
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}
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return &debug.Module{Version: "unknown"}
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}
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