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docs: two lists for one sibling now stop the build
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The README and the spec comment said that a project two paths load with
different lists ends up in the program twice. They now say the build
stops, with an error that names both paths.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Jorijn van der Graaf 2026-10-31 05:19:30 +01:00
commit 34874c7143
Signed by: jorijnvdgraaf
GPG key ID: 2937E59CDCC1BCFB
2 changed files with 4 additions and 4 deletions
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README.md
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@ -74,7 +74,7 @@ Configuration* sibling = LocalProject({ .projectFile = "../Crafter.Math/project.
cfg.dependencies = { math };
```
The sibling's `CrafterBuildProject` gets the args this `project.cpp` was loaded with (`ProjectArgs()`), so `--target=`, `--march=`, `--debug` and the project's own flags reach every sibling down the chain. That is all of them: `cfg.projectArgs` holds only what `ApplyStandardArgs` did not interpret, and passing it on would drop the target and the build type. Set `.args` to send something else: `{}` for nothing, or a list built from the project's args, such as one without a flag only this project reads. Build such a list once and give it to every sibling. A project that two paths load with different lists is built twice, and the program ends up with both builds. Releases up to 2.2.0 forward nothing when `.args` is left out.
The sibling's `CrafterBuildProject` gets the args this `project.cpp` was loaded with (`ProjectArgs()`), so `--target=`, `--march=`, `--debug` and the project's own flags reach every sibling down the chain. That is all of them: `cfg.projectArgs` holds only what `ApplyStandardArgs` did not interpret, and passing it on would drop the target and the build type. Set `.args` to send something else: `{}` for nothing, or a list built from the project's args, such as one without a flag only this project reads. Build such a list once and give it to every sibling. A project that two paths load with different lists would end up in the program twice, so the build stops with an error that names both paths. Releases up to 2.2.0 forward nothing when `.args` is left out.
The default is read when the spec is made, so make it inside `CrafterBuildProject`, on the thread that calls it. A spec made at namespace scope, on a thread of your own or in a script forwards nothing.