Files
Sauci/.agents/learnings/promoted/2026-08-31-local-eas-build-preconditions.md
T
jjbruntonandClaude Fable 5 7a76936829 docs(agents): promote v1.0.8 release learnings
Record three confirmed v1.0.8 failure modes (expo prebuild native
regressions, npm 10/11 lockfile divergence, local EAS build
preconditions) and promote each into docs/releasing.md, a new
docs/development/dependencies.md, and the release-preflight script.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-08-31 16:03:02 +01:00

2.4 KiB

id, date, status, scope, evidence, destination, review_after
id date status scope evidence destination review_after
2026-08-31-local-eas-build-preconditions 2026-08-31 promoted apps/mobile local EAS release builds v1.0.8 local EAS build session, commit d8bedea docs/releasing.md 2026-11-30

Symptom

Local EAS release builds failed before native compilation for environment reasons unrelated to the app source, and a successful iOS build left the tracked source in a state that fails release-preflight afterward.

Reproduction

Run eas build --local from a non-interactive shell without first exporting ANDROID_HOME/ANDROID_SDK_ROOT/JAVA_HOME: fails with "SDK location not found" because non-interactive shells do not load the user profile. Run it with a non-empty EAS_LOCAL_BUILD_WORKINGDIR: fails with "Workingdir is not empty". Run it outside apps/mobile: eas cannot find the project. Pipe the build log through tail: the full log needed for diagnosis is lost. After a successful iOS build, EAS auto-increment updates both Info.plists but not the widget target's CURRENT_PROJECT_VERSION in the pbxproj, so release-preflight fails until it is synced.

Cause

eas must be installed as a global CLI (scripts call bare eas; eas-cli 23.0.0 verified). Non-interactive shells used for automation do not source the profile that normally exports the Android/Java environment variables. EAS_LOCAL_BUILD_WORKINGDIR must not exist or be empty. EAS iOS auto-increment writes plist versions but does not touch the widget target's pbxproj CURRENT_PROJECT_VERSION, so it drifts from the app's build number by one increment after every successful build.

Remediation

Before a local EAS build: verify eas is on PATH, explicitly export ANDROID_HOME, ANDROID_SDK_ROOT, and JAVA_HOME (JDK 17), ensure EAS_LOCAL_BUILD_WORKINGDIR does not exist or is empty, and run from apps/mobile. Capture the full build log to a file rather than piping through tail. After a successful build, sync the widget's CURRENT_PROJECT_VERSION to the new build number (commit d8bedea, sed 46 to 47) and sync ios/Podfile.lock from the successful build's working directory when dependencies changed, since the archive's pod install resolution is authoritative and local CocoaPods here is broken.

Evidence

docs/releasing.md's local-build section documents the environment preconditions and the post-build widget CURRENT_PROJECT_VERSION and Podfile.lock sync steps; npm run release:preflight passes after the sync.