build-cran-binaries/local
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pat-s 642e07e1d6
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fix(build): recompute a stale package snapshot, not just a missing one (#190)
## Motivation

`arm64/alpine324` reported nothing to build while thousands were missing:

```
line  49: Precomputed 7192 package versions (6871 r-minor-sensitive)   <- install-deps agent
line  99: Total# of remaining package versions: 43 (sensitive_only=TRUE) <- a build shard
line 101: Skipped 0 package versions already attempted under R 4.4; 0 remaining
```

Both numbers come from the **same pipeline**. The same run's index step dropped 2407 packages as missing for 4.4 and 2436 for 4.6.

## Cause

```r
if (!all(file.exists(package_cache_files))) { ... recompute ... }
```

Existence is not freshness. The snapshot describes S3 and CRAN state when it was written, and the cache volume is per-agent — the file's own comment says so. An agent that ran an earlier pipeline keeps serving that pipeline's answer forever, and no later fix to how the snapshot is computed (#189) can reach it.

## Change

Recompute when the snapshot is stale as well as when it is missing. Keyed on the pipeline when the CI exposes an identifier (`CI_PIPELINE_NUMBER`, `CI_BUILD_NUMBER`, `CI_PIPELINE_ID`), so a new pipeline recomputes once per agent and its shards then share the result. Off CI, or when none is set, an age check with a two hour default (`PACKAGE_SNAPSHOT_TTL_HOURS`).

## Verification

| scenario | decision |
|---|---|
| files missing | RECOMPUTE |
| same pipeline id | reuse |
| **new pipeline id** | **RECOMPUTE** |
| no CI var, recent file | reuse |
| no CI var, aged out | RECOMPUTE |

I could not confirm which identifier Crow actually sets — none is referenced anywhere in this repo — so all three are tried and the age check backs them up. If none is present the behaviour is the age path, which is still correct, just coarser.

Reviewed-on: #190
2026-08-31 22:11:17 +00:00
..
patches fix(patches): support RcppParallel 6.2.1 2026-08-30 14:26:37 +00:00
tests feat(rebuild): shard the weekly rebuild and make each shard resumable (#163) 2026-08-12 08:30:29 +00:00
archive-missed-pkgs.R feat: R-minor-sensitive binary builds (full + iterative) (#84) 2026-06-14 08:04:40 +00:00
build-all.R fix(build): recompute a stale package snapshot, not just a missing one (#190) 2026-08-31 22:11:17 +00:00
build-one.R feat: patch registry + wiring for per-package patching (#103) 2026-06-30 08:50:19 +00:00
check-cdn-cache.sh add alpine321 to scripts 2024-12-29 10:18:55 +01:00
check-NA.R feat: R-minor-sensitive binary builds (full + iterative) (#84) 2026-06-14 08:04:40 +00:00
debug-packages-writing.R feat: R-minor-sensitive binary builds (full + iterative) (#84) 2026-06-14 08:04:40 +00:00
dedupe-audit-issue.R fix(audit): replace arch subsection in place instead of appending duplicates (#138) 2026-07-21 08:51:23 +00:00
detect-duplicates.R feat: R-minor-sensitive binary builds (full + iterative) (#84) 2026-06-14 08:04:40 +00:00
excluded-packages.json feat: R-minor-sensitive binary builds (full + iterative) (#84) 2026-06-14 08:04:40 +00:00
failing-builds-classify.R feat(local): aggregate blocked-on-dependency reporting by dependency (#131) 2026-07-16 21:24:03 +00:00
failing-builds-report.R feat(local): detect dependency-cascade failures generally, not just RcppParallel (#128) 2026-07-16 08:23:54 +00:00
fetch-rebuild-packages-from-issue.R fix(audit): replace arch subsection in place instead of appending duplicates (#138) 2026-07-21 08:51:23 +00:00
find-R-api-packages.sh chore(local): add S3 migration and CRAN-source helper scripts 2026-06-14 13:02:48 +02:00
install-bincraft.R refactor: migrate package installation from pak to uvr (#147) 2026-07-31 12:19:26 +00:00
label-removed-cran-packages.R feat: R-minor-sensitive binary builds (full + iterative) (#84) 2026-06-14 08:04:40 +00:00
last-processed-by-platform.R feat: R-minor-sensitive binary builds (full + iterative) (#84) 2026-06-14 08:04:40 +00:00
migrate-s3-hetzner-to-backblaze.sh chore(local): add S3 migration and CRAN-source helper scripts 2026-06-14 13:02:48 +02:00
missing-cran-packages-db.R feat: R-minor-sensitive binary builds (full + iterative) (#84) 2026-06-14 08:04:40 +00:00
missing-cran-packages.R feat: R-minor-sensitive binary builds (full + iterative) (#84) 2026-06-14 08:04:40 +00:00
missing-packages-in-index.R feat: R-minor-sensitive binary builds (full + iterative) (#84) 2026-06-14 08:04:40 +00:00
packages-to-build.R fix(build): stop per-minor objects masking the per-minor candidate list (#189) 2026-08-31 21:36:11 +00:00
packages-without-any-binary.R feat: R-minor-sensitive binary builds (full + iterative) (#84) 2026-06-14 08:04:40 +00:00
proposal-tracking-lib.R feat(local): aggregate blocked-on-dependency reporting by dependency (#131) 2026-07-16 21:24:03 +00:00
proposal-tracking.R feat(local): aggregate blocked-on-dependency reporting by dependency (#131) 2026-07-16 21:24:03 +00:00
propose-patches.R feat(local): aggregate blocked-on-dependency reporting by dependency (#131) 2026-07-16 21:24:03 +00:00
query-pkgs-without-old-versions.R chore(local): add S3 migration and CRAN-source helper scripts 2026-06-14 13:02:48 +02:00
r-minor-helpers.R refactor: migrate package installation from pak to uvr (#147) 2026-07-31 12:19:26 +00:00
rebuild-missing-helpers.R feat(rebuild): shard the weekly rebuild and make each shard resumable (#163) 2026-08-12 08:30:29 +00:00
rebuild-missing.R feat(rebuild): shard the weekly rebuild and make each shard resumable (#163) 2026-08-12 08:30:29 +00:00
repair-built-stamp.R fix(index): add a slot repair for a broken Built stamp and retire alpine 3.21 (#150) 2026-08-07 09:15:04 +00:00
test-package-loading.R refactor: migrate package installation from pak to uvr (#147) 2026-07-31 12:19:26 +00:00
trial-build-patch.R fix(local): make trial-build-patch.R detect non-throwing build failures (#134) 2026-07-18 08:37:04 +00:00
trial-build-registry.R fix(local): make the trial-build gate detect non-throwing build failures (#130) 2026-07-16 08:24:03 +00:00
uvr-install.sh fix(rebuild): harden split workflow setup (#164) 2026-08-13 13:38:28 +00:00
validate-patches.R feat(local): auto-propose registry patches and track the feedback loop (#117) 2026-07-14 15:03:24 +00:00
weekly-missing-binaries-audit.R fix(audit): count a source fallback as a missing binary (#157) 2026-08-09 10:37:41 +00:00