mirror of https://github.com/hrfee/jfa-go
along with an ugly wrapper for the help message that merges the descriptions for the short & long versions.pull/97/head
Harvey Tindall
4 years ago
parent
886ae64feb
commit
a2c344de83
@ -0,0 +1,88 @@
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package main
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import (
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"bufio"
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"bytes"
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"flag"
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"fmt"
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"os"
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"strings"
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)
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/* Adds start/stop/systemd to help message, and
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also gets rid of usage for shorthand flags, and merge them with the full-length one.
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implementation is 🤢, will clean this up eventually.
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-h SHORTHAND
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-help
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prints this message.
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becomes:
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-help, -h
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prints this message.
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*/
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func helpFunc() {
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fmt.Fprint(os.Stderr, `Usage of jfa-go:
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start
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start jfa-go as a daemon and run in the background.
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stop
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stop a daemonized instance of jfa-go.
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systemd
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generate a systemd .service file.
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`)
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shortHands := []string{"-help", "-data", "-config", "-port"}
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var b bytes.Buffer
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// Write defaults into buffer then remove any shorthands
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flag.CommandLine.SetOutput(&b)
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flag.PrintDefaults()
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flag.CommandLine.SetOutput(os.Stderr)
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scanner := bufio.NewScanner(&b)
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out := ""
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line := scanner.Text()
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eof := !scanner.Scan()
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lastLine := false
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for !eof || lastLine {
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nextline := scanner.Text()
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start := 0
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if len(nextline) != 0 {
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for nextline[start] == ' ' && start < len(nextline) {
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start++
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}
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}
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if strings.Contains(line, "SHORTHAND") || (len(nextline) != 0 && strings.Contains(nextline, "SHORTHAND") && nextline[start] != '-') {
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line = nextline
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if lastLine {
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break
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}
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eof := !scanner.Scan()
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if eof {
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lastLine = true
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}
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continue
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}
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// if !strings.Contains(line, "SHORTHAND") && !(strings.Contains(nextline, "SHORTHAND") && !strings.Contains(nextline, "-")) {
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match := false
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for i, c := range line {
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if c != '-' {
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continue
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}
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for _, s := range shortHands {
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if i+len(s) <= len(line) && line[i:i+len(s)] == s {
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out += line[:i+len(s)] + ", " + s[:2] + line[i+len(s):] + "\n"
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match = true
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break
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}
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}
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}
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if !match {
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out += line + "\n"
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}
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line = nextline
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if lastLine {
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break
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}
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eof := !scanner.Scan()
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if eof {
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lastLine = true
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}
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}
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fmt.Fprint(os.Stderr, out)
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}
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