fb56684999
Use `nix build --print-build-logs` to prefix the build output with the name of its derivation. This helps to distinguish build outputs when output is interleaved in parallel builds.
48 lines
1.1 KiB
Bash
Executable file
48 lines
1.1 KiB
Bash
Executable file
#!/usr/bin/env bash
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# Build a single-output derivation and store it in 'cachixCache'.
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# Skip the build if it is already cached.
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# Accepts the same arguments as nix-instantiate.
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set -euo pipefail
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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 ${BASH_SOURCE[0]}:$LINENO"' ERR
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tmpDir=$(mktemp -d -p /tmp)
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trap 'rm -rf $tmpDir' EXIT
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## Instantiate
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time nix-instantiate "$@" --add-root "$tmpDir/drv" --indirect > /dev/null
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drv=$(realpath "$tmpDir/drv")
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echo "instantiated $drv"
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outPath=$(nix-store --query "$drv")
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if nix path-info --store "https://${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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## Build
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if [[ -v CIRRUS_CI ]]; then
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cachix use "$cachixCache"
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fi
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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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buildCmd="cachix watch-exec $cachixCache nix -- build"
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else
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buildCmd="nix build"
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fi
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$buildCmd --out-link "$tmpDir/result" --print-build-logs "$drv^*"
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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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