nix-bitcoin/test/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"