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1name: CI
2
3on:
4 push:
5 branches: [master]
6 pull_request:
7 workflow_dispatch:
8
9# A newer run for the same ref replaces a running one.
10concurrency:
11 group: ci-${{ github.ref }}
12 cancel-in-progress: true
13
14# One job per check shows failing checks in the run overview, the same for
15# the NixOS machines, see the eval job.
16jobs:
17 list:
18 runs-on: ubuntu-latest
19 outputs:
20 checks: ${{ steps.list.outputs.checks }}
21 steps:
22 - uses: actions/checkout@v4
23 with:
24 # Fetch all history for git-based operations
25 fetch-depth: 0
26
27 - uses: cachix/install-nix-action@v31
28
29 - id: list
30 run: |
31 checks=$(nix eval --json .#checks.x86_64-linux --apply builtins.attrNames)
32 echo "checks=$checks" >> "$GITHUB_OUTPUT"
33
34 check:
35 needs: list
36 name: ${{ matrix.check }}
37 runs-on: ubuntu-latest
38 strategy:
39 fail-fast: false
40 matrix:
41 check: ${{ fromJSON(needs.list.outputs.checks) }}
42 steps:
43 - uses: actions/checkout@v4
44 with:
45 # Fetch all history for git-based operations
46 fetch-depth: 0
47
48 - uses: cachix/install-nix-action@v31
49
50 - run: nix build -L --no-link '.#checks.x86_64-linux.${{ matrix.check }}'
51
52 outputs:
53 name: packages and devShells
54 runs-on: ubuntu-latest
55 steps:
56 - uses: actions/checkout@v4
57 with:
58 # Fetch all history for git-based operations
59 fetch-depth: 0
60
61 - uses: cachix/install-nix-action@v31
62
63 - run: |
64 for output in packages devShells; do
65 echo "$output:"
66 # shellcheck disable=SC2016 # ${...} is Nix interpolation
67 nix eval --raw ".#$output.x86_64-linux" --apply 'xs: builtins.deepSeq (builtins.mapAttrs (_: x: x.drvPath) xs) "${toString (builtins.length (builtins.attrNames xs))} evaluated\n"'
68 done
69
70 # The NixOS machines, built on plain runners with hestia (the GitHub Actions
71 # cache) as binary cache next to cache.lassul.us:
72 #
73 # - eval: evaluates ciToplevels once, uploads the drv closures to hestia
74 # and lists the machines whose toplevel is in neither cache.
75 # - shared: builds the derivations needed by more than one of them once,
76 # so the machine jobs substitute them instead of each building them.
77 # - one job per listed machine, builds its toplevel by drv path.
78 #
79 # Every job pushes what it added to the store to cache.lassul.us
80 # (.github/ci-build.sh), for deploys.
81 eval:
82 runs-on: ubuntu-latest
83 permissions:
84 contents: read
85 actions: read # hestia: detect evicted cache entries upfront
86 id-token: write # niks3 push
87 outputs:
88 matrix: ${{ steps.matrix.outputs.matrix }}
89 any-jobs: ${{ steps.matrix.outputs.any-jobs }}
90 manifest-version: ${{ steps.matrix.outputs.manifest-version }}
91 niks3: ${{ steps.niks3.outputs.path }}
92 steps:
93 - uses: actions/checkout@v4
94 - uses: cachix/install-nix-action@v31
95 with:
96 extra_nix_config: |
97 trusted-users = root runner
98 extra-substituters = https://cache.lassul.us
99 extra-trusted-public-keys = cache.lassul.us-1:aOMEO5TU6eLvhyPi0jmgjR2sVlGjMq3rK0MeACjTcQ0=
100 - uses: Mic92/hestia@v3
101 with:
102 upstream-cache-filter: true
103 filter-drv-closures: true
104 # the niks3 client of all jobs, the others substitute it
105 - id: niks3
106 run: |
107 niks3=$(nix build --no-link --print-out-paths .#niks3)
108 echo "path=$niks3" >> "$GITHUB_OUTPUT"
109 PATH=$niks3/bin:$PATH .github/niks3-push.sh "$niks3"
110 - id: matrix
111 uses: Mic92/hestia/matrix@v3
112 with:
113 flake: ".#ciToplevels"
114 nix-eval-jobs: "nix run nixpkgs#nix-eval-jobs -- --workers 4 --max-memory-size 3072"
115 - env:
116 MATRIX: ${{ steps.matrix.outputs.matrix }}
117 run: |
118 echo "not cached: $(jq -r '[.include[].name] | join(" ")' <<<"$MATRIX")" |
119 tee -a "$GITHUB_STEP_SUMMARY"
120
121 shared:
122 needs: eval
123 if: needs.eval.outputs.any-jobs == 'true'
124 runs-on: ubuntu-latest
125 permissions:
126 contents: read
127 actions: read # hestia: detect evicted cache entries upfront
128 id-token: write # niks3 push
129 outputs:
130 manifest-version: ${{ steps.build.outputs.manifest-version }}
131 steps:
132 - uses: actions/checkout@v4
133 - uses: cachix/install-nix-action@v31
134 with:
135 extra_nix_config: |
136 trusted-users = root runner
137 extra-substituters = https://cache.lassul.us
138 extra-trusted-public-keys = cache.lassul.us-1:aOMEO5TU6eLvhyPi0jmgjR2sVlGjMq3rK0MeACjTcQ0=
139 - uses: Mic92/hestia@v3
140 with:
141 upstream-cache-filter: true
142 wait-manifest-version: ${{ needs.eval.outputs.manifest-version }}
143 - env:
144 NIKS3: ${{ needs.eval.outputs.niks3 }}
145 run: |
146 nix-store --realise "$NIKS3"
147 echo "$NIKS3/bin" >> "$GITHUB_PATH"
148 - id: build
149 env:
150 MATRIX: ${{ needs.eval.outputs.matrix }}
151 EVAL_MANIFEST_VERSION: ${{ needs.eval.outputs.manifest-version }}
152 run: |
153 matrix=$RUNNER_TEMP/matrix.json
154 plans=$RUNNER_TEMP/plans
155 printf '%s' "$MATRIX" > "$matrix"
156 read -ra installables <<<"$(jq -r '[.include[].installables] | join(" ")' "$matrix")"
157 "$HESTIA_BIN" prefetch "${installables[@]}"
158 .github/ci-shared.sh "$matrix" "$plans"
159 mapfile -t shared < "$plans/shared.drvs"
160 version=$EVAL_MANIFEST_VERSION
161 if [ "${#shared[@]}" -gt 0 ]; then
162 # a failed one fails the jobs of the machines that need it
163 .github/ci-build.sh "${shared[@]/%/^*}" ||
164 echo "::warning::some shared derivations failed to build"
165 # upload now instead of in the post step, so the machine jobs can
166 # wait for the manifest version that contains the shared outputs
167 "$HESTIA_BIN" drain --socket "$HESTIA_SOCKET" 2>&1 | tee "$RUNNER_TEMP/drain.txt"
168 drained=$(sed -nE 's/.*; manifest m[0-9]+#([0-9]+)$/\1/p' "$RUNNER_TEMP/drain.txt")
169 version=${drained:-$version}
170 fi
171 echo "manifest-version=$version" >> "$GITHUB_OUTPUT"
172 {
173 for name in $(jq -r '.include[].name' "$matrix"); do
174 echo "- $name: $(wc -l < "$plans/$name.drvs") derivations to build"
175 done
176 echo "- shared (needed by >= 2 machines): ${#shared[@]}"
177 printf '%s\n' "${shared[@]}" | sed -E 's|^/nix/store/[^-]+-(.*)\.drv$| \1|'
178 } | tee -a "$GITHUB_STEP_SUMMARY"
179
180 build:
181 needs: [eval, shared]
182 if: needs.eval.outputs.any-jobs == 'true'
183 name: ${{ matrix.name }}
184 runs-on: ${{ matrix.os }}
185 permissions:
186 contents: read
187 actions: read # hestia: detect evicted cache entries upfront
188 id-token: write # niks3 push
189 strategy:
190 fail-fast: false
191 matrix: ${{ fromJSON(needs.eval.outputs.matrix) }}
192 steps:
193 - uses: actions/checkout@v4
194 - uses: cachix/install-nix-action@v31
195 with:
196 extra_nix_config: |
197 trusted-users = root runner
198 extra-substituters = https://cache.lassul.us
199 extra-trusted-public-keys = cache.lassul.us-1:aOMEO5TU6eLvhyPi0jmgjR2sVlGjMq3rK0MeACjTcQ0=
200 - uses: Mic92/hestia@v3
201 with:
202 upstream-cache-filter: true
203 wait-manifest-version: ${{ needs.shared.outputs.manifest-version }}
204 - env:
205 NIKS3: ${{ needs.eval.outputs.niks3 }}
206 run: |
207 nix-store --realise "$NIKS3"
208 echo "$NIKS3/bin" >> "$GITHUB_PATH"
209 - name: build ${{ matrix.name }}
210 env:
211 INSTALLABLES: ${{ matrix.installables }}
212 run: |
213 read -ra installables <<<"$INSTALLABLES"
214 "$HESTIA_BIN" prefetch "${installables[@]}"
215 .github/ci-build.sh "${installables[@]}"
216
217 # Fixed-name summary of the jobs above, the required status check for
218 # merging into master (the matrix job names change with the hosts).
219 # Skipped: no machine to build, or a job it needs failed.
220 ci:
221 needs: [list, check, outputs, eval, shared, build]
222 if: always()
223 runs-on: ubuntu-latest
224 steps:
225 - env:
226 RESULTS: ${{ join(needs.*.result, ' ') }}
227 run: |
228 echo "results: $RESULTS"
229 for r in $RESULTS; do
230 [ "$r" = success ] || [ "$r" = skipped ] || exit 1
231 done