Make `target^` a first-class citizen · ninja-build/ninja#2382

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featurehelp wanted

描述

From the manual:

There is also a special syntax target^ for specifying a target as the first output of some rule containing the source you put in the command line, if one exists. For example, if you specify target as foo.c^ then foo.o will get built (assuming you have those targets in your build files).

Can you please make these special foo.c^ targets behave as regular targets in all ninja commands by simply "dereferencing" them first? For example, while building foo.c^ works, this breaks:

$ ninja -t clean foo.c^
Cleaning...
ninja: error: unknown target 'foo.c^'
0 files.

貢獻者指南

技術棧: cpp
領域: build system
議題類型: feature
難度: 4
預計時間: 1-2 days
活動狀態: stale
清晰度: clear
前置要求: C++ programmingNinja build system internals
新手友善度: 25
研究方向: Investigate how ninja parses targets in build commands vs. tool commands (e.g., ` t clean`). Look at `src/ninja.cc` and `src/manifest parser.cc` to see where `target^` is handled. The issue requires extending the target resolution logic to all command paths. No linked PRs or comments provide additional guidance.