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Fix behavior around `BASHBREW_LIBRARY` in GHA 

This script needs/uses a custom `BASHBREW_LIBRARY` directory, but it stores that value in the exported environment slightly too soon such that `generate-stackbrew-library.sh` picks it up (and shouldn't be).

We often use "`BASHBREW_LIBRARY` is unset (or empty)" as a conditional for whether to fall back to using "https://github.com/docker-library/official-images/raw/HEAD/library/" as an explicit prefix for querying "source of truth" values for things like supported parent architectures.

These two things collided in cc2dc88e04 (and similar commits) because the script saw `BASHBREW_LIBRARY` set, trusted it, but then fails to find the parent image.

This is the cleanest place to fix this such that `generate-stackbrew-library.sh` can take `BASHBREW_LIBRARY` from the provided environment instead of using our generated value.
This commit is contained in:
Tianon Gravi 2024-09-30 11:35:58 -07:00
parent 7afe152f6d
commit d64a9e81b0
1 changed files with 4 additions and 3 deletions
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7
scripts/github-actions/generate.sh
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@ -21,10 +21,11 @@ if ! command -v bashbrew &> /dev/null; then
bashbrew --version > /dev/null
fi
mkdir "$tmp/library"
export BASHBREW_LIBRARY="$tmp/library"
mkdir "$tmp/library" # not exporting this as BASHBREW_LIBRARY yet so that "generate-stackbrew-library.sh" gets the externally-set value of BASHBREW_LIBRARY (or unset value) so it can use that to change behavior (see https://github.com/docker-library/buildpack-deps/commit/cc2dc88e04e82cb4c4c2091205d888a5d5b386f3 for an example)
eval "${GENERATE_STACKBREW_LIBRARY:-./generate-stackbrew-library.sh}" > "$BASHBREW_LIBRARY/$image"
eval "${GENERATE_STACKBREW_LIBRARY:-./generate-stackbrew-library.sh}" > "$tmp/library/$image"
export BASHBREW_LIBRARY="$tmp/library"
# if we don't appear to be able to fetch the listed commits, they might live in a PR branch, so we should force them into the Bashbrew cache directly to allow it to do what it needs
if ! bashbrew fetch "$image" &> /dev/null; then