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feat(ops/terraform): allow specifying an entrypoint for the attrset

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This adds an additional parameter `entrypoint`, pointing to a .nix file
(or a directory containing a `default.nix` file) that's providing the
attribute path asked for.

If not set / kept at the default (empty string), it falls back to the
root dir of the repository as before.

Change-Id: I2e63114f21660c842153ac15424b3491d66624d2
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8190
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
Autosubmit: flokli <flokli@flokli.de>
This commit is contained in:
Florian Klink 2023-03-01 14:56:14 +01:00 • committed by clbot
parent 344c119370
commit c3750079f7
2 changed files with 15 additions and 5 deletions
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7
ops/terraform/deploy-nixos/nixos-eval.sh
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@ -5,12 +5,11 @@ set -ueo pipefail
# Load input variables from Terraform. jq's @sh format takes care of
# escaping.
eval "$(jq -r '@sh "ATTRPATH=\(.attrpath)"')"
eval "$(jq -r '@sh "ATTRPATH=\(.attrpath) && ENTRYPOINT=\(.entrypoint)"')"
# Evaluate the system derivation.
# TODO: configurable REPO_ROOT
REPO_ROOT=$(git rev-parse --show-toplevel)
SYSTEM_DRV=$(nix-instantiate -A "${ATTRPATH}" "${REPO_ROOT}")
[[ -z "$ENTRYPOINT" ]] && ENTRYPOINT=$(git rev-parse --show-toplevel)
SYSTEM_DRV=$(nix-instantiate -A "${ATTRPATH}" "${ENTRYPOINT}")
# Return system derivation back to Terraform.
jq -n --arg drv "$SYSTEM_DRV" '{"drv":$drv}'