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Re-vendors REPO_POLICIES.md, script/cibuild, script/docker, script/lint and script/test from sneak/prompts next at 0653579, on sneak's ruling in sneak/prompts#130. In the lint, test and builder stages of the Dockerfile, the module download, and in builder the apk install, move above ARG CACHEBUST, so Docker keeps those layers until the base image, the install line, go.mod or go.sum changes. golangci-lint run also mounts golangci-lint's cache. Every step that lints, tests or compiles still comes after ARG CACHEBUST, and go test keeps -count=1 and -race. README and TODO.md say the same. Model: opus-5-5
29 lines
1.1 KiB
Bash
Executable File
29 lines
1.1 KiB
Bash
Executable File
#!/bin/sh
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# script/lint: run the linter. Linting is a phase of the Dockerfile and
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# this builds that phase alone; the linter is never installed or run on
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# a developer host, where a shared result cache and a host-global lock
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# make its answer untrustworthy.
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#
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# The phase is not the last stage in the file, so it is built only when
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# --target names it. A new CACHEBUST value reruns every RUN step after
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# the ARG CACHEBUST line, since a cached lint layer is a lint that did
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# not run; unlike --no-cache, it keeps the layers above that line and
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# the cache mounts. This relies on every stage of the Dockerfile
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# declaring ARG CACHEBUST before every step that lints, tests or
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# compiles; a stage without that line is served from cache on an
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# unchanged tree, with no warning.
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# --output type=cacheonly writes no image, since nothing uses one.
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set -eu
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SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd -P)"
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ROOT="$(cd "$SCRIPT_DIR/.." && pwd -P)"
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main() {
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cd "$ROOT"
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docker build --build-arg CACHEBUST="$(date +%s)-$$" \
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--target lint \
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--output type=cacheonly .
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}
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main "$@"
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