Replace ServiceEntry's parallel prodInstanceId/stagingInstanceId/domains/probe/
repoNameOverride fields with a single environments: Record<string, {instanceId,
domain?, probe?, repoName?}> map plus a hoisted env-independent probeDriver.
EnvName becomes an open string backed by an ENV_ID_BY_NAME registry so
accessors resolve arbitrary env names; a single-env service (the staging-only
showcase-harness-worker) now simply omits the absent env instead of carrying a
placeholder ID/borrowed host.
Accessors instanceIdFor/domainFor/repoNameFor index environments[env]
(domainFor still throws on missing/scheme); add envsFor(name),
serviceEnvPairs(), and probeEnabled(name, env). Generalize the image-ref gate
(iterate each service's declared environments, resolve env-id via the
registry, sum/iterate missingByEnv over registry env names) and verify-deploy's
host->env reverse-map (envForTarget iterates environments).
Pure TS-internal: emit-railway-envs-json.ts projects the env-map back onto the
FROZEN legacy JSON shape (prodInstanceId/stagingInstanceId/domains/probe/
repoNameOverride) via a documented legacyJsonCompat shim for the two domainless
harness workers, so railway-envs.generated.json stays byte-identical and Ruby
(bin/railway) + workflow jq + the parity test are untouched. Verified: emit
--check zero drift, Ruby test_expected_domains_parity green, golden snapshot
toEqual proves byte-identical resolution for every real (service, env) pair,
full scripts vitest suite green, showcase scripts typecheck clean.
Distinguish ENOENT (treat as drift) from other read errors in
emit-railway-envs-json.ts --check; non-ENOENT errors now exit 2 with the
real error on stderr instead of being silently coerced into a misleading
'stale' message or an overwrite on a false drift signal.
Add a --out=<path> override so tests can write to a temp directory and
never mutate the tracked railway-envs.generated.json artifact. Rewrite
the emit-railway-envs-json test to use mkdtempSync + --out, switch the
staleness assertion to spawnSync so it asserts on exit code 1 plus the
stale-diagnostic substring, and add coverage for the new EISDIR
fail-loud path. After this change git status is clean post-test.
Adds Domains, ProbeDriver, ProbeConfig types + domainFor() helper that
throws on unknown service/env. Populates domains.{staging,prod} and
probe.{staging,prod,driver} on every SERVICES entry. Adds
emit-railway-envs-json.ts to serialize the SSOT for the Ruby side and
the workflow consumers.
Refs spec §3 / §3a.
Jordan Ritter