两个板级包:模拟器不再是安装期的边 - #343
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THE TIER WAS CORRECT AND BOUGHT NOTHING, AND ONLY A SANDBOX COULD SHOW THAT. `riscv-virt-rt@0.7.1` and `aarch64-virt-rt@0.2.1` moved their emulator onto the `run` tier, and both repositories assert it in their own CI: a build names the emulator zero times, a run names it. Both pass. They pass because a repository testing itself builds from its WORKING TREE, where no package install happens. A consumer installs the package, and this descriptor's platform `deps` is materialised at that moment — so a fresh sandbox running exactly the asserted build still downloaded 33 MB of emulator, through this line rather than through the tier. Measured: `Downloading xim:qemu-riscv@9.2.4-1 … 33.1 MB` inside a build that had already been proved not to ask for it. The emulator is removed from `deps` on both boards. riscv keeps `xim:picolibc-riscv`, which is a different case and a documented one: the C library IS needed to build, and removing it was a regression that took five versions to surface. OLDER VERSIONS KEEP WORKING, which is why this is safe to do at the platform level where `deps` applies to every version. 0.7.0 and 0.2.0 declare their emulator in an untiered `[xlings.workspace]` entry, which means `Always` — so it arrives when they build rather than when they install.
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分档是对的,但什么都没买到——而只有沙箱能看出来。
两个板级包在 0.7.1 / 0.2.1 把模拟器移到了
run档,各自 CI 也断言了「build 不要 / run 要」,两边都过。它们过是因为仓库自测是从工作树构建的,不发生包安装。消费者是要安装包的,而这个描述符的平台
deps正是在那一刻被物化——于是全新沙箱里跑同一个已被断言过的 build,仍然下载了 33 MB 模拟器,走的是这条线而不是分档。实测:
Downloading xim:qemu-riscv@9.2.4-1 … 33.1 MB,出现在一个刚被证明「不要模拟器」的构建里。两块板的
deps都移除模拟器。riscv 保留xim:picolibc-riscv——那是另一回事且有记录:C 库是构建需要的,移除它曾是一个五个版本后才浮现的回归。旧版本不会坏,这也是可以在「对所有版本生效」的平台级做这件事的原因:0.7.0 / 0.2.0 的
[xlings.workspace]是无档写法,等于Always,模拟器在它们构建时到达而不是安装时。