50 lines
1.2 KiB
Bash
Executable file
50 lines
1.2 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 GITHUB_ACTIONS ]]; then
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# Avoid cachix warning message
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mkdir -p ~/.config/nix && touch ~/.config/nix/nix.conf
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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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