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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,3 +1,4 @@ | ||
| xx | ||
| .vscode/launch.json | ||
| *.exe | ||
| *.exe~ | ||
|
|
||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,76 @@ | ||
| package app | ||
|
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| import ( | ||
| "fmt" | ||
| ) | ||
|
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| func parseArgsInternal(args []string) (hasHelp bool, hasVersion bool, commands []string, nonFlagCount int) { | ||
| commands = []string{} | ||
| if len(args) == 0 { | ||
| hasHelp = true | ||
| return | ||
| } | ||
|
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| helpForms := map[string]bool{ | ||
| "--help": true, "-help": true, "help": true, | ||
| "--h": true, "-h": true, | ||
| } | ||
|
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| versionForms := map[string]bool{ | ||
| "--version": true, "-version": true, "version": true, | ||
| "--v": true, "-v": true, | ||
| } | ||
|
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| for i, arg := range args { | ||
| if helpForms[arg] { | ||
| hasHelp = true | ||
| continue | ||
| } | ||
| if versionForms[arg] { | ||
| hasVersion = true | ||
| continue | ||
| } | ||
| commands = append(commands, arg) | ||
| if i != 0 && len(arg) == 0 || arg[0] != '-' { | ||
| nonFlagCount++ | ||
| } | ||
| } | ||
|
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| return | ||
| } | ||
|
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| func cleanArgs(args []string) []string { | ||
| programName := args[:1] // program name | ||
|
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| hasHelp, hasVersion, commands, _ := parseArgsInternal(args[1:]) | ||
| if hasHelp { | ||
| result := append(programName, "help") | ||
| if len(commands) > 0 { | ||
| return append(result, commands[0]) | ||
| } | ||
| return result | ||
| } | ||
|
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| if hasVersion { | ||
| return append(programName, "version") | ||
| } | ||
|
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| return append(programName, commands...) | ||
| } | ||
|
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| func validateArgs(args []string, expectedCmdCount, expectedFlagCount int) error { | ||
| _, _, flags, cmdCnt := parseArgsInternal(args) | ||
| if cmdCnt != expectedCmdCount || len(flags) != expectedFlagCount { | ||
| if cmdCnt > expectedCmdCount { | ||
| var err error | ||
| if unknown := getUnknownCmd(args); len(unknown) > 0 { | ||
| err = fmt.Errorf("command '%s' not found", unknown) | ||
| } else { | ||
| err = fmt.Errorf("use only one command at a time") | ||
| } | ||
| return err | ||
| } | ||
| return fmt.Errorf("argument mismatch: %v %v %d %d", args, flags, cmdCnt, len(flags)) | ||
| } | ||
| return nil | ||
| } |
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