Ensure the release works before uploading the tarballs#25
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This commit starts to use build-manifest's new checksum cache feature, which stores all the checksums it calculated in a JSON file before exiting. This allows to avoid duplicate calculations.
This commit changes how build-manifest is invoked, stopping it from generating the manifests directly into the downloads directory. Instead, the files are generated in a separate directory and then merged back. While there is not much point in doing so *right now*, this will be crucial to implement smoke tests for the release, as we need to generate a separate set of manifests with a different download URL to be able to perform the smoke test. Having the generated output in a separate directory will allow to easily discard those temporary manifests and their signatures in a clean way.
This commit changes the release process to execute a "smoke test" before uploading the release to the destination buckets, by generating another set of manifests pointing to a localhost server serving the files we're about to upload. After the localhost web server is up then rustup is invoked to download the toolchain, and cargo is invoked to create a binary project and run the hello world in it. If any of this fails the release is aborted.
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This PR adds a section to the release process to make sure the release we're about to upload can be installed and can run "Hello world". This is mainly meant to prevent a bug in
build-manifestmaking the release impossible to install, and could give us more confidence in making changes to it.The steps executed during the smoke test are:
build-manifestpointing to the HTTP address of the server created earlier, and the checksums it generated are cached to allow the followingbuild-manifestexecution to complete in just a couple of seconds.RUSTUP_DIST_SERVERpointing to the local webserver, first removing the existing toolchain and then installing the release we're about to upload to production. This ensures installing the toolchain works.cargo init --bin .andcargo runin a temporary directory. This ensures the toolchain is not incredibly broken.Fixes #15
This PR can be reviewed commit-by-commit.
r? @Mark-Simulacrum