feat(dev): speed up and add a live dashboard to local stack startup by vbudhram · Pull Request #20688 · mozilla/fxa

vbudhram · 2026-06-03T22:56:35Z

Because

A cold yarn start mza ran full production builds of the entire @fxa/* library graph, which the dev servers resolve from src anyway, so most of that build work was wasted.
It streamed raw nx/pm2/build output, so it was hard to tell which services were up, and failures were easy to miss in the noise.

This pull request

Adds a build-dev fast path via separate start-dev / restart-dev nx targets (nx.json, per-package package.json). yarn start mza / yarn restart mza use them; full yarn start / yarn restart and CI keep build and stay race-free.
Adds _scripts/start-dashboard.js (+ start-dashboard.test.js): an in-place per-service dashboard (nx command, live activity line, phase, ready time). TTY-only; FXA_START_PLAIN=1 / non-TTY fall back to streaming. Raw output always lands in artifacts/nx-start-dev.log, and every failure points to where to look.
Adds _scripts/start-mza.sh: quiets pm2 infra/launch/table noise and reports total startup time.
Hardens startup: docker preflight, labeled URL readiness checks, redis gate (REDIS_PASSWORD), dynamic db-patcher count, parallel fxa-shared ESM/CJS compile, and a check-build-dev-coverage.sh guard.

Speed improvements

Metric	Before	After
`yarn start mza` build graph	143 tasks (full `@fxa/*` build)	24 tasks, 0 prod lib builds
`yarn restart mza` lib builds	99	3
`yarn restart mza` wall (warm)	~174s	~90s

@fxa/* libs resolve from src at dev runtime, so build-dev skips them. Full yarn start / yarn restart / CI graphs are unchanged.

Issue that this pull request solves

N/A — local dev-tooling improvement (no Jira ticket).

Checklist

Put an x in the boxes that apply

My commit is GPG signed.
If applicable, I have modified or added tests which pass locally.
I have added necessary documentation (if appropriate).
I have verified that my changes render correctly in RTL (if appropriate).
I have manually reviewed all AI generated code.

Other information

How to test:

yarn start mza (TTY) → expect the compact infra summary + live dashboard, then ✅ Stack ready in Ns.
Re-run yarn restart mza → reloads via build-dev (~3 build tasks), not the full lib build.
FXA_START_PLAIN=1 yarn start mza → falls back to plain nx/pm2 streaming.

Output

mac:fxa-agent vijaybudham$ yarn start mza
nps is executing `start.mza` : _scripts/start-mza.sh tag:type:core,tag:type:demo
Starting infrastructure…
  ✅ docker network fxa
  ✅ infrastructure started: mysql redis sns firestore sync jaeger otel-collector cloud-tasks-emulator cirrus 
waiting for containers to start
⏳ Waiting for goaws (SNS) (http://localhost:4100/health, expect HTTP 200)...
✅ goaws (SNS) responded in 2s
⏳ Waiting for firebase emulator (http://localhost:9299/api/config, expect HTTP 200)...
✅ firebase emulator responded in 4s

Checking for redis...
✅ redis responded in 1s
waiting for DB patches

Checking for DB patches...
⏳ Waiting for DB patches to complete...
📋 Patch Summary:
  ✅ Successfully patched fxa to 193
  ✅ Successfully patched fxa_oauth to 37
  ✅ Successfully patched fxa_profile to 4
  ✅ Successfully patched pushbox to 2
✅ DB patches applied successfully

Checking Node version compatibility...
✅ Node version is compatible (v24.15.0, required 24.15.0)
Mozilla Accounts services — starting                  1:27
nx run-many -t start-dev --projects=tag:type:core,tag:type:demo
──────────────────────────────────────────────────────
  ✔  fxa-auth-server      ready   :9000  80s
  ✔  fxa-profile-server   ready   :1111  24s
  ✔  fxa-content-server   ready   :3030  87s
  ✔  fxa-settings         ready   :3000  62s
  ✔  123done              ready   :8080  42s
──────────────────────────────────────────────────────
  5/5 ready   deps ✔
  ▸ nx: all tasks complete
  logs ▸ artifacts/nx-start-dev.log

  All services responded.  💡 'yarn ports' lists every port.

✅ Stack ready in 109s. Run 'yarn stop' to stop all the servers.

vbudhram · 2026-06-04T15:45:51Z

          persist-credentials: false
+      - name: Set up Node
+        # .nvmrc ships in the FxA repo, checked out into fxa-code/ just above
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6


This was failing for me in CI and reordering fixed it. Seems like we should use the nvmrc in FxA reitehr way.

vbudhram · 2026-06-04T15:47:39Z

+  exit 1
+fi
+
+# On an interactive TTY (the same gate the start dashboard uses), replace pm2's


I didn't have to add this, but watching all the pm2 and nx builds go by just seemed excessive. Now there is a simple live dashboard as the services come up. You can still see logs with FXA_START_PLAIN=1

Copilot

Pull request overview

This PR improves the local yarn start mza / yarn restart mza developer workflow by introducing a “dev-fast” Nx path (build-dev / start-dev / restart-dev) that avoids unnecessary full production library builds, and by adding a TTY-only live startup dashboard that summarizes per-service readiness while still capturing full raw output to artifacts/.

Changes:

Add Nx build-dev / start-dev / restart-dev target defaults and wire per-package build-dev/start-dev/restart-dev scripts so mza can take a faster startup path.
Introduce a TTY dashboard (_scripts/start-dashboard.js) for start-dev that renders per-service status and writes full Nx output to artifacts/nx-start-dev.log.
Harden startup reliability (Docker preflight, labeled URL checks, Redis gate, dynamic db-patcher expected count) and adjust l10n GitHub Actions node setup to use the checked-out repo’s .nvmrc.

Reviewed changes

Copilot reviewed 25 out of 25 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
packages/fxa-shared/scripts/build-ts-parallel.sh	Parallelizes ESM/CJS TypeScript builds for `fxa-shared` to reduce critical-path startup time.
packages/fxa-shared/package.json	Switches `build-ts` to the parallel script; adds `build-dev`/`start-dev`/`restart-dev`.
packages/fxa-settings/package.json	Adds `build-dev`; adds `start-dev`/`restart-dev`; improves readiness check labeling.
packages/fxa-react/package.json	Adds `build-dev` plus `start-dev`/`restart-dev` aliases.
packages/fxa-profile-server/package.json	Adds `build-dev` and `start-dev`/`restart-dev`; improves readiness check labeling.
packages/fxa-customs-server/package.json	Adds `start-dev`/`restart-dev` aliases.
packages/fxa-content-server/package.json	Adds `build-dev`, readiness labeling, and `implicitDependencies` for build-dev graph correctness.
packages/fxa-auth-server/package.json	Adds `build-dev`, `start-dev`/`restart-dev`, and Nx `start-dev` dependency tweaks (incl. `gen-keys`).
packages/fxa-auth-client/package.json	Adds `build-dev` script for dev-fast graph compatibility.
packages/123done/package.json	Adds `start-dev`/`restart-dev` aliases for dev-fast orchestration.
package-scripts.js	Routes `start mza` through `_scripts/start-mza.sh` and uses `restart-dev` for mza restarts.
nx.json	Adds `build-dev`, `start-dev`, and `restart-dev` target defaults/outputs for dev-fast execution.
libs/vendored/crypto-relier/project.json	Adds `build-dev` target so dist-loaded code is built in the dev-fast path.
libs/shared/l10n/project.json	Adds `build-dev` target for dev-fast coverage.
.github/workflows/l10n-gettext-extract.yml	Ensures setup-node reads `.nvmrc` from the checked-out FxA repo path.
_scripts/start-mza.sh	New wrapper for mza startup: preflight + infra + dev-fast services + quiet sync restart + total time.
_scripts/start-dashboard.test.js	Adds pure-logic tests for dashboard line parsing/state transitions.
_scripts/start-dashboard.js	Implements the live TTY startup dashboard and log capture for `start-dev`.
_scripts/pm2-all.sh	Adds dashboard entrypoint for `start-dev`, streams Nx output to logs, and improves readiness banner checks.
_scripts/check-url.sh	Enhances readiness polling output with labels/heartbeat and improved messaging.
_scripts/check-redis.sh	Adds a redis readiness gate (non-fatal) to reduce cold-start connection noise.
_scripts/check-pre-launch.sh	Avoids blocking prompts in non-TTY contexts when Nx cache is large.
_scripts/check-db-patcher.sh	Derives expected db-patcher count dynamically from migrations layout.
_scripts/check-build-dev-coverage.sh	Adds a guard to ensure dist-loaded libs in mza scope have a `build-dev` target.
_dev/pm2/start.sh	Adds Docker daemon preflight, quiet infra startup path, labeled URL checks, and redis/db-patcher gating.

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

+for i in $(seq 1 "$RETRY"); do
+  if [ "$(curl -s -o /dev/null -w "%{http_code}" "http://$TARGET")" == "$EXPECTED" ]; then


+  { project: 'fxa-auth-server', label: 'fxa-auth-server', url: 'http://localhost:9000/__heartbeat__', pm2: 'auth' },
+  { project: 'fxa-profile-server', label: 'fxa-profile-server', url: 'http://localhost:1111/__heartbeat__', pm2: 'profile' },
+  { project: 'fxa-content-server', label: 'fxa-content-server', url: 'http://localhost:3030', pm2: 'content' },
+  { project: 'fxa-settings', label: 'fxa-settings', url: 'http://localhost:3000/settings/static/js/bundle.js', pm2: 'settings-react' },
+  { project: '123done', label: '123done', url: 'http://localhost:8080', pm2: '123done' },


+      if (j.targets && j.targets['build-dev']) ok=true;
+      if (j.scripts && j.scripts['build-dev']) ok=true;


vbudhram · 2026-06-04T15:55:14Z

+#!/usr/bin/env node
+'use strict';
+
+// Live, in-place startup dashboard for `yarn start mza` (the start-dev fast


AI helped to build this live dashboard out. TLDR is there is a state machine to track the services startup state, rendering live output from nx and pm2 and service health polling

Since this is only on yarn start mza and a developer only improvement I think its probably ok.

vbudhram · 2026-06-04T16:15:29Z

        "command": "echo Build complete"
      }
    },
+    "build-dev": {


This nx command is the stripped down version of build, skips compiling since dev mode builds from source anyways.

Because: - Local stack startup (yarn start / yarn start mza) was slow and gave little feedback about what was happening during the boot sequence. This commit: - Speeds up the local stack startup and adds a live dashboard. - Shows a spinner during the quiet sync restart in yarn start mza. - Fixes the l10n-gettext-extract workflow's Node setup: the FxA repo is checked out into fxa-code/, so the root .nvmrc setup-node looked for was never present. Reorders setup-node after the checkout and points node-version-file at fxa-code/.nvmrc, keeping a single version source. - Bounds check-url.sh curl with connect/max timeouts so a stalled connection can't hang the readiness loop. - Polls fxa-content-server's bundle path so the dashboard can't report ready before webpack emits the bundle. - Recognizes build-dev declared under package.json nx.targets in the build-dev coverage guard.

github-advanced-security AI found potential problems Jun 3, 2026

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vbudhram force-pushed the faster-stack branch 4 times, most recently from 8008bd6 to e552f0b Compare June 4, 2026 15:42

vbudhram marked this pull request as ready for review June 4, 2026 15:44

Copilot AI review requested due to automatic review settings June 4, 2026 15:44

vbudhram requested a review from a team as a code owner June 4, 2026 15:44

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vbudhram force-pushed the faster-stack branch from e552f0b to 8df9fde Compare June 4, 2026 19:00

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feat(dev): speed up and add a live dashboard to local stack startup#20688

feat(dev): speed up and add a live dashboard to local stack startup#20688
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		for i in $(seq 1 "$RETRY"); do
		if [ "$(curl -s -o /dev/null -w "%{http_code}" "http://$TARGET")" == "$EXPECTED" ]; then

		if (j.targets && j.targets['build-dev']) ok=true;
		if (j.scripts && j.scripts['build-dev']) ok=true;

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vbudhram commented Jun 3, 2026

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Speed improvements

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