86 lines
2.2 KiB
Go
86 lines
2.2 KiB
Go
package cmdline
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import (
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"flag"
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"fmt"
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"log"
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"os"
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)
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var (
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printDebug bool
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outputFile string
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)
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// func searchGoogle(song string, lg *log.Logger) {
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// }
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// func searchGenius(song string, lg *log.Logger) {
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// }
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func Main() int {
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programName := os.Args[0]
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errorLog := log.New(os.Stderr, "", 0)
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mainLog := log.New(os.Stdout, "", 0)
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flags := flag.NewFlagSet(os.Args[0], flag.ExitOnError)
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flags.Usage = func() {
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out := flags.Output()
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fmt.Fprintf(out, "Usage: %v [dir]\n\n", programName)
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fmt.Fprint(out, " [dir] is optional; if not passed, '.' is used.\n\n")
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fmt.Fprint(out, " By default, the server listens on localhost:8080. Both the\n")
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fmt.Fprint(out, " host and the port are configurable with flags. Set the host\n")
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fmt.Fprint(out, " to something else if you want the server to listen on a\n")
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fmt.Fprint(out, " specific network interface. Setting the port to 0 will\n")
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fmt.Fprint(out, " instruct the server to pick a random available port.\n\n")
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flags.PrintDefaults()
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}
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outputFlag := flags.String("output", "", "Lyrics filename")
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verboseFlag := flags.Bool("verbose", false, "Turn on debug. Default is false.")
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searchFlag := flags.String("search", "", "Name of song to search. If the name of the song is not a single word, put in quotes\"\"")
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flags.Parse(os.Args[1:])
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if len(flags.Args()) > 1 {
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errorLog.Println("Error: too many command-line arguments")
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flags.Usage()
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return 1
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}
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allSetFlags := flagsSet(flags)
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songToSearch := *searchFlag
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if len(songToSearch) == 0 {
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errorLog.Println("Error: the song name must be provided for search")
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flags.Usage()
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return 1
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}
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if allSetFlags["output"] {
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outputFile = *outputFlag
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} else {
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mainLog.Printf("Using %s as the name of the file(s) for downloaded lyrics..\n", songToSearch)
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}
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printDebug = *verboseFlag
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if printDebug {
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mainLog.Printf("Output flag: %s, Debug flag: %t, Search flag: %s\n", outputFile, printDebug, songToSearch)
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}
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return 0
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}
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// flagsSet returns a set of all the flags what were actually set on the
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// command line.
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func flagsSet(flags *flag.FlagSet) map[string]bool {
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s := make(map[string]bool)
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flags.Visit(func(f *flag.Flag) {
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s[f.Name] = true
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})
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return s
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}
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