60 lines
2.2 KiB
Nix
60 lines
2.2 KiB
Nix
# SPDX-FileCopyrightText: 2024 Luke Granger-Brown <depot@lukegb.com>
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#
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# SPDX-License-Identifier: Apache-2.0
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{ depot, system, pkgs, ... }:
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pkgs.writeShellApplication {
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name = "switch-prebuilt";
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runtimeInputs = with pkgs; [ curl unzip jq ];
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text = ''
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set -ue
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system="''${1}"
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if [[ "$system" == "latest" ]]; then
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tmpdir="$(mktemp -d)"
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trap '{ rm -rf -- "$tmpdir"; }' EXIT
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COMMIT_DATA="$(curl -s 'https://hg.lukegb.com/api/v4/projects/lukegb%2Fdepot/repository/commits/branch%2Fdefault')"
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echo "Commit: $(echo "$COMMIT_DATA" | jq -r '.id') $(echo "$COMMIT_DATA" | jq -r '.title')"
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if [[ "$(echo "$COMMIT_DATA" | jq -r '.last_pipeline.id')" == null ]]; then
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echo "...but there's no CI pipeline for it"
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exit 1
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fi
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PARENT_PIPELINE_BRIDGES="$(curl -s "https://hg.lukegb.com/api/v4/projects/lukegb%2Fdepot/pipelines/$(echo "$COMMIT_DATA" | jq -r '.last_pipeline.id')/bridges")"
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if [[ "$(echo "$PARENT_PIPELINE_BRIDGES" | jq -r '. | length')" == 0 ]]; then
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echo "...but there's no downstream pipeline for it"
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exit 1
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fi
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CHILD_PIPELINE_ID="$(echo "$PARENT_PIPELINE_BRIDGES" | jq -r '.[].downstream_pipeline.id')"
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CHILD_PIPELINE_JOBS="$(curl -s "https://hg.lukegb.com/api/v4/projects/lukegb%2Fdepot/pipelines/$CHILD_PIPELINE_ID/jobs?per_page=100")"
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CACHE_JOB_ID="$(echo "$CHILD_PIPELINE_JOBS" | jq -r '.[] | select(.name == "nixCache-linux") | .id')"
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if [[ "$CACHE_JOB_ID" == "" ]]; then
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echo "...but there's no data for the cache job"
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exit 1
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fi
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curl -so "$tmpdir/systems.json" "https://hg.lukegb.com/api/v4/projects/lukegb%2Fdepot/jobs/$CACHE_JOB_ID/artifacts/systems.json"
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system="$(jq -r ".\"$(hostname)\"" "$tmpdir/systems.json")"
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echo "Switching to system ''$system"
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fi
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if [[ ! -e "$system" ]]; then
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# We should be a trusted-user.
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nix build -v "$system"
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fi
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diff "$system/etc/hostname" "/etc/hostname"
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# The next phase requires sudo, but it's harmless to run the preceding commands twice.
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if [[ $EUID -ne 0 ]]; then
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exec sudo "$0" "$system"
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fi
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nix-env -p /nix/var/nix/profiles/system --set "$system"
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"$system/bin/switch-to-configuration" switch
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'';
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}
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