Use GO's flag parser instead of getopt
There's only one flag, so it doesn't matter.
This commit is contained in:
r
parent
003233d60d
commit
c5f12920b0
15
main.go
15
main.go
|
|
@ -2,6 +2,7 @@ package main
|
||||||
|
|
||||||
import (
|
import (
|
||||||
"errors"
|
"errors"
|
||||||
|
"flag"
|
||||||
"fmt"
|
"fmt"
|
||||||
"log"
|
"log"
|
||||||
"net/http"
|
"net/http"
|
||||||
|
|
@ -26,18 +27,12 @@ func errExit(err error) {
|
||||||
}
|
}
|
||||||
|
|
||||||
func main() {
|
func main() {
|
||||||
opts, _, err := util.Getopts(os.Args, "f:")
|
configFile := flag.String("f", "", "config file")
|
||||||
if err != nil {
|
flag.Parse()
|
||||||
errExit(err)
|
|
||||||
}
|
|
||||||
|
|
||||||
for _, opt := range opts {
|
if len(*configFile) > 0 {
|
||||||
switch opt.Option {
|
configFiles = []string{*configFile}
|
||||||
case 'f':
|
|
||||||
configFiles = []string{opt.Value}
|
|
||||||
}
|
}
|
||||||
}
|
|
||||||
|
|
||||||
config, err := config.ParseFiles(configFiles)
|
config, err := config.ParseFiles(configFiles)
|
||||||
if err != nil {
|
if err != nil {
|
||||||
errExit(err)
|
errExit(err)
|
||||||
|
|
|
||||||
122
util/getopt.go
122
util/getopt.go
|
|
@ -1,122 +0,0 @@
|
||||||
/*
|
|
||||||
Copyright 2019 Drew DeVault <sir@cmpwn.com>
|
|
||||||
|
|
||||||
Redistribution and use in source and binary forms, with or without
|
|
||||||
modification, are permitted provided that the following conditions are met:
|
|
||||||
|
|
||||||
1. Redistributions of source code must retain the above copyright notice, this
|
|
||||||
list of conditions and the following disclaimer.
|
|
||||||
|
|
||||||
2. Redistributions in binary form must reproduce the above copyright notice,
|
|
||||||
this list of conditions and the following disclaimer in the documentation
|
|
||||||
and/or other materials provided with the distribution.
|
|
||||||
|
|
||||||
3. Neither the name of the copyright holder nor the names of its contributors
|
|
||||||
may be used to endorse or promote products derived from this software without
|
|
||||||
specific prior written permission.
|
|
||||||
|
|
||||||
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
|
|
||||||
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
||||||
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
||||||
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
|
||||||
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
||||||
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
||||||
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
||||||
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
||||||
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
||||||
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
||||||
*/
|
|
||||||
|
|
||||||
package util
|
|
||||||
|
|
||||||
import (
|
|
||||||
"fmt"
|
|
||||||
"os"
|
|
||||||
)
|
|
||||||
|
|
||||||
// In the case of "-o example", Option is 'o' and "example" is Value. For
|
|
||||||
// options which do not take an argument, Value is "".
|
|
||||||
type Option struct {
|
|
||||||
Option rune
|
|
||||||
Value string
|
|
||||||
}
|
|
||||||
|
|
||||||
// This is returned when an unknown option is found in argv, but not in the
|
|
||||||
// option spec.
|
|
||||||
type UnknownOptionError rune
|
|
||||||
|
|
||||||
func (e UnknownOptionError) Error() string {
|
|
||||||
return fmt.Sprintf("%s: unknown option -%c", os.Args[0], rune(e))
|
|
||||||
}
|
|
||||||
|
|
||||||
// This is returned when an option with a mandatory argument is missing that
|
|
||||||
// argument.
|
|
||||||
type MissingOptionError rune
|
|
||||||
|
|
||||||
func (e MissingOptionError) Error() string {
|
|
||||||
return fmt.Sprintf("%s: expected argument for -%c", os.Args[0], rune(e))
|
|
||||||
}
|
|
||||||
|
|
||||||
// Getopts implements a POSIX-compatible options interface.
|
|
||||||
//
|
|
||||||
// Returns a slice of options and the index of the first non-option argument.
|
|
||||||
//
|
|
||||||
// If an error is returned, you must print it to stderr to be POSIX complaint.
|
|
||||||
func Getopts(argv []string, spec string) ([]Option, int, error) {
|
|
||||||
optmap := make(map[rune]bool)
|
|
||||||
runes := []rune(spec)
|
|
||||||
for i, rn := range spec {
|
|
||||||
if rn == ':' {
|
|
||||||
if i == 0 {
|
|
||||||
continue
|
|
||||||
}
|
|
||||||
optmap[runes[i-1]] = true
|
|
||||||
} else {
|
|
||||||
optmap[rn] = false
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
var (
|
|
||||||
i int
|
|
||||||
opts []Option
|
|
||||||
)
|
|
||||||
for i = 1; i < len(argv); i++ {
|
|
||||||
arg := argv[i]
|
|
||||||
runes = []rune(arg)
|
|
||||||
if len(arg) == 0 || arg == "-" {
|
|
||||||
break
|
|
||||||
}
|
|
||||||
if arg[0] != '-' {
|
|
||||||
break
|
|
||||||
}
|
|
||||||
if arg == "--" {
|
|
||||||
i++
|
|
||||||
break
|
|
||||||
}
|
|
||||||
for j, opt := range runes[1:] {
|
|
||||||
if optopt, ok := optmap[opt]; !ok {
|
|
||||||
opts = append(opts, Option{'?', ""})
|
|
||||||
return opts, i, UnknownOptionError(opt)
|
|
||||||
} else if optopt {
|
|
||||||
if j+1 < len(runes)-1 {
|
|
||||||
opts = append(opts, Option{opt, string(runes[j+2:])})
|
|
||||||
break
|
|
||||||
} else {
|
|
||||||
if i+1 >= len(argv) {
|
|
||||||
if len(spec) >= 1 && spec[0] == ':' {
|
|
||||||
opts = append(opts, Option{':', string(opt)})
|
|
||||||
} else {
|
|
||||||
return opts, i, MissingOptionError(opt)
|
|
||||||
}
|
|
||||||
} else {
|
|
||||||
opts = append(opts, Option{opt, argv[i+1]})
|
|
||||||
i++
|
|
||||||
}
|
|
||||||
}
|
|
||||||
} else {
|
|
||||||
opts = append(opts, Option{opt, ""})
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
return opts, i, nil
|
|
||||||
}
|
|
||||||
Loading…
Reference in New Issue