swiftlang/swift-package-manager

[SR-7831] `ArgumentParser` parses short option and option-argument without delimiting space as a single (likely unrecognised) option

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#4,800 建立於 2018年5月31日

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 (6 留言) (0 反應) (0 負責人)Swift (10,145 star) (1,462 fork)batch import
buggood first issue

描述
Previous ID SR-7831
Radar rdar://problem/36340481
Original Reporter @aciidb0mb3r
Type Bug
Votes 0
Component/s Package Manager
Labels Bug, StarterBug
Assignee None
Priority Medium

md5: 96d5acc7cd3ec4326fc64597be212962

Issue Description:

`ArgumentParser` parses short option and option-argument without delimiting space as a single (likely unrecognised) option.

For example, if an option is added to the parser with a short name of `-n`, `ArgumentParser` parses `-n 2` as the “n” option with “2” as its option-argument.

But it parses `-n2` as the unknown option `n2`.

Where long options are prefixed with `--`, it is common for CLI to treat `-n2` and `-n 2` identically.

This probably also implies `ArgumentParser` doesn’t handle adjoining flags (e.g. parsing `-abc` identically to `-a -b -c`) — but I haven’t tested this.

貢獻者指南

技術棧
swift
領域
clitooling
議題類型
bug
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
3
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
half day
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
stale
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
clear
前置要求
Swift programmingCLI argument parsing
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
60
研究方向
Look at the ArgumentParser source in the Swift Package Manager repo, focusing on how short options are parsed. The issue describes that ' n2' is treated as an unknown option instead of ' n' with argument '2'. Examine the parsing logic for option argument separation and consider how to allow concatenated short options and their arguments, similar to common CLI behavior. Also check for handling of adjoining flags (e.g., ' abc' as ' a b c'). The existing comments and the StarterBug label suggest a localized fix.