76 lines
1.9 KiB
Bash
76 lines
1.9 KiB
Bash
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#!/usr/bin/env bash
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# This script can also be run locally for testing:
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# scenario=default ./build.sh
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#
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# WARNING: This script fetches contents from an untrusted $cachixCache to your local nix-store.
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#
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# When variable CIRRUS_CI is unset, this script leaves no persistent traces on the host system.
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set -euo pipefail
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scenario=${scenario:-}
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CACHIX_SIGNING_KEY=${CACHIX_SIGNING_KEY:-}
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cachixCache=nix-bitcoin
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trap 'echo Error at line $LINENO' ERR
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if [[ -v CIRRUS_CI ]]; then
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tmpDir=/tmp
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if [[ $scenario ]]; then
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if [[ ! -e /dev/kvm ]]; then
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>&2 echo "No KVM available on VM host."
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exit 1
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fi
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# Enable KVM access for nixbld users
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chmod o+rw /dev/kvm
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fi
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else
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atExit() {
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rm -rf $tmpDir
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if [[ -v cachixPid ]]; then kill $cachixPid; fi
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}
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tmpDir=$(mktemp -d -p /tmp)
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trap atExit EXIT
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# Prevent cachix from writing to HOME
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export HOME=$tmpDir
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fi
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cachix use $cachixCache
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cd "${BASH_SOURCE[0]%/*}"
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## Build
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echo "$NIX_PATH ($(nix eval --raw nixpkgs.lib.version))"
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if [[ $scenario ]]; then
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buildExpr=$(../test/run-tests.sh --scenario $scenario exprForCI)
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else
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buildExpr="import ./build.nix"
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fi
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time nix-instantiate -E "$buildExpr" --add-root $tmpDir/drv --indirect > /dev/null
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printf "instantiated "; realpath $tmpDir/drv
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outPath=$(nix-store --query $tmpDir/drv)
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if nix path-info --store https://$cachixCache.cachix.org $outPath &>/dev/null; then
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echo "$outPath" has already been built successfully.
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exit 0
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fi
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# Cirrus doesn't expose secrets to pull-request builds,
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# so skip cache uploading in this case
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if [[ $CACHIX_SIGNING_KEY ]]; then
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# Speed up task by uploading store paths as soon as they are created
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cachix push $cachixCache --watch-store &
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cachixPid=$!
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fi
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nix-build --out-link $tmpDir/result $tmpDir/drv >/dev/null
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if [[ $CACHIX_SIGNING_KEY ]]; then
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cachix push $cachixCache $outPath
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fi
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echo $outPath
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