mirror of
https://github.com/NoRedInk/noredink-ui.git
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55 lines
2.3 KiB
YAML
55 lines
2.3 KiB
YAML
language: nix
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env:
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global:
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- CACHIX_CACHE=noredink-ui
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cache:
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directories:
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- node_modules
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- ~/.elm
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install:
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# This setup script comes from the cachix docs[1], but we annotate it here so
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# it's easier to maintain.
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#
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# [1]: https://docs.cachix.org/continuous-integration-setup/travis-ci.html
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# First, we need to tell Nix that the current user is trusted to make changes to
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# the system configuration, so that we can do exactly that in the next step.
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- echo "trusted-users = $USER" | sudo tee -a /etc/nix/nix.conf
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- sudo systemctl restart nix-daemon
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# Next, we need to tell Nix to use our cache to avoid building fresh every time.
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# Under the covers, this means trusting the signing key and adding the
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# our-cache-name.cachix.org as a substituter. But we don't really need to worry
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# a lot about the mechanism here, since the `cachix use` statement here will
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# take care of everything for us if it has the right permissions.
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- nix-env -iA nixpkgs.cachix
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- cachix use $CACHIX_CACHE
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# Next, we list all the paths that Nix currently knows about so that we don't
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# waste time trying to push them later.
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- nix path-info --all > /tmp/store-path-pre-build
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# Finally, we run `nix-shell` with a no-op command to download our real
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# dependencies. This step should now take advantage of the cachix cache and
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# avoid rebuilding any upstream software we depend on! (At the time of this
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# writing, that measn we avoid compiling `niv` and `elm-forbid-import` on every
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# run.)
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#
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# Note that this step is technically not necessary--running our build command in
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# `nix-shell` below would also take care of this--but getting dependencies here
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# lets us collapse the (huge) download list in the Travis UI.
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- nix-shell --run 'true'
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script:
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- nix-shell --pure --run 'shake --verbose ci'
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after_success:
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# After we successfully build, we want to cache whatever we can. That means that
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# when dependencies change, we should only build them once. The invocation below
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# just gets the difference between the derivations we had before the build and
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# the derivations we have now, and pushes the new ones.
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- comm -13 <(sort /tmp/store-path-pre-build | grep -v '\.drv$') <(nix path-info --all | grep -v '\.drv$' | sort) | cachix push $CACHIX_CACHE
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