nix-bitcoin/ci/build-to-cachix.sh

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#!/usr/bin/env bash
# Build a single-output derivation and store it in 'cachixCache'.
# Skip the build if it is already cached.
# Accepts the same arguments as nix-instantiate.
set -euo pipefail
CACHIX_SIGNING_KEY=${CACHIX_SIGNING_KEY:-}
cachixCache=nix-bitcoin
trap 'echo Error at line $LINENO' ERR
tmpDir=$(mktemp -d -p /tmp)
trap "rm -rf $tmpDir" EXIT
## Instantiate
time nix-instantiate "$@" --add-root $tmpDir/drv --indirect > /dev/null
printf "instantiated "; realpath $tmpDir/drv
outPath=$(nix-store --query $tmpDir/drv)
if nix path-info --store https://$cachixCache.cachix.org $outPath &>/dev/null; then
echo "$outPath has already been built successfully."
exit 0
fi
## Build
if [[ -v CIRRUS_CI ]]; then
cachix use $cachixCache
fi
if [[ $CACHIX_SIGNING_KEY ]]; then
# Speed up task by uploading store paths as soon as they are created
buildCmd="cachix watch-exec $cachixCache nix-build --"
else
buildCmd=nix-build
fi
$buildCmd --out-link $tmpDir/result $tmpDir/drv >/dev/null
if [[ $CACHIX_SIGNING_KEY ]]; then
cachix push $cachixCache $outPath
fi
echo $outPath