Produce app builds on ledger-live-build CI

When: to produce installable artifacts (desktop installers, APK, iOS) of a ledger-live branch — for QA, manual testing, or sharing a build with reviewers.

These workflows live in LedgerHQ/ledger-live-build, not ledger-live. That changes how you dispatch them vs. run-e2e-ci:

• Target the build repo: gh workflow run <wf> -R LedgerHQ/ledger-live-build.
• The branch you want to build is passed as inputs, not --ref: -f repo=LedgerHQ/ledger-live -f ref=<branch>. The workflow checks out inputs.ref from inputs.repo. --ref (if given) would select the ledger-live-build ref and should be left at default (main).
• gh must run outside the sandbox (dangerouslyDisableSandbox: true).

1. Scope by context — only build what the diff impacts

Builds are slow and expensive (especially desktop = macOS + Linux + Windows). Study the PR diff / branch changes and dispatch only the relevant surfaces:

Diff touches	Build
apps/ledger-live-desktop/**	Desktop
apps/ledger-live-mobile/**	Android + iOS
shared libs (libs/**, e.g. ledger-live-common, coin-modules) impacting both apps	Desktop + Android + iOS

If the user explicitly names a platform ("make an APK", "iOS build"), honor that and skip the inference. When in doubt about a shared-lib change, ask which app(s) to build rather than building all three.

Scope off the PR's file list, not git diff develop...HEAD. A stale merge-base makes the local three-dot diff pull in hundreds of unrelated files. When a PR exists, use gh pr view <pr> -R LedgerHQ/ledger-live --json files --jq '.files[].path' for the true change set.

2. Workflows & inputs

Workflow	File	Produces	Extra inputs
Desktop	build-desktop.yml	macOS, Linux, Windows bundles	upload_datadog_sourcemaps (bool, default false)
Android	build-apk.yml	.apk	—
iOS	build-ios.yml	iOS build	—

All three share repo (default LedgerHQ/ledger-live) and ref (default develop).

3. Dispatch

# Branch to build: prefer the PR head (robust to detached HEAD on a PR SHA),
# fall back to the current branch only when there's no PR in context.
BR=$(gh pr view <pr> -R LedgerHQ/ledger-live --json headRefName --jq .headRefName 2>/dev/null \
     || git rev-parse --abbrev-ref HEAD)
R=LedgerHQ/ledger-live-build

gh workflow run build-desktop.yml -R "$R" -f repo=LedgerHQ/ledger-live -f ref="$BR"
gh workflow run build-apk.yml     -R "$R" -f repo=LedgerHQ/ledger-live -f ref="$BR"
gh workflow run build-ios.yml     -R "$R" -f repo=LedgerHQ/ledger-live -f ref="$BR"

Then grab the run IDs (dispatch is async; give it a few seconds). Filter per workflow since run-names don't echo the source branch:

gh run list -R "$R" --workflow build-desktop.yml --limit 3
gh run list -R "$R" --workflow build-apk.yml     --limit 3
gh run list -R "$R" --workflow build-ios.yml     --limit 3

4. Comment on the PR (if a PR is in context)

If the branch has an open ledger-live PR, post the dispatched runs on it. The PR lives in ledger-live, the runs in ledger-live-build — link accordingly. Use --edit-last to update an existing comment instead of stacking.

# First time: post a new comment.
gh pr comment <pr> -R LedgerHQ/ledger-live --body "..."
# On re-dispatch: update the same comment instead of stacking a new one.
gh pr comment <pr> -R LedgerHQ/ledger-live --edit-last --body "..."

## 📦 Triggered builds

Dispatched on `ledger-live-build` for `<branch>` (commit <short-sha>):

| Platform | Run |
|---|---|
| Desktop (macOS / Linux / Windows) | [run <id>](https://github.com/LedgerHQ/ledger-live-build/actions/runs/<id>) |
| Android (APK) | [run <id>](https://github.com/LedgerHQ/ledger-live-build/actions/runs/<id>) |
| iOS | [run <id>](https://github.com/LedgerHQ/ledger-live-build/actions/runs/<id>) |

Artifacts will be attached to each run on completion.

Only include rows for the platforms you actually dispatched. If there's no PR in context, just report the run links back in chat.