Fix iOS OAuth deep link by preserving custom URL scheme in Info.plist

[AnthonyRonning]

Problem

iOS OAuth login (GitHub/Google) is broken. After authenticating in Safari, the redirect back to the app via cloud.opensecret.maple://auth?... fails with "Safari cannot open the page because the address is invalid."

Root Cause

The tauri-plugin-deep-link plugin's build.rs overwrites CFBundleURLTypes in the iOS Info.plist during every build. Since our tauri.conf.json mobile config only has https universal link entries (for payment/pricing paths), the plugin strips the manually-added cloud.opensecret.maple custom URL scheme from Info.plist.

The simulator worked because it had a cached URL scheme registration from previous local builds. TestFlight/CI builds always ran the full Tauri build pipeline which triggered the stripping.

Fix

Added a post-build step in build.rs that runs after tauri_build::build() (and after all plugin build scripts). It checks if the cloud.opensecret.maple scheme is present in the iOS Info.plist and re-adds it if missing.

---

Summary by CodeRabbit

• Chores
  • Improved iOS build configuration to ensure proper URL scheme setup during the build process.

[cloudflare-workers-and-pages]

Deploying maple with    Cloudflare Pages

Latest commit:	951f1e9
Status:	✅  Deploy successful!
Preview URL:	https://42c08684.maple-ca8.pages.dev
Branch Preview URL:	https://fix-ios-url-scheme-build.maple-ca8.pages.dev

View logs

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 2af8046 and 951f1e9.

⛔ Files ignored due to path filters (1)

• frontend/src-tauri/Cargo.lock is excluded by !**/*.lock

📒 Files selected for processing (2)

• frontend/src-tauri/Cargo.toml
• frontend/src-tauri/build.rs

---

📝 Walkthrough

Walkthrough

This PR introduces iOS custom URL scheme support for cloud.opensecret.maple. A new build-time dependency (plist = 1) and build function ensure_ios_custom_url_scheme() are added. The function reads the iOS Info.plist, checks for the custom scheme entry, injects it if missing, and integrates into the iOS build process.

Changes

Cohort / File(s)	Summary
Build Dependencies frontend/src-tauri/Cargo.toml	Added plist = "1" as a build-time dependency to enable plist file parsing and modification.
Build Script Enhancement frontend/src-tauri/build.rs	Added ensure_ios_custom_url_scheme() function that reads the iOS Info.plist, checks for CFBundleURLTypes entry with scheme "cloud.opensecret.maple", injects it if absent, and writes back the file. Function is called in main() after tauri_build::build() on iOS targets.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• Update Tauri to 2.9.2 and all plugins to latest versions #296: Modifies iOS deep-link configuration to enable the cloud.opensecret.maple scheme alongside this PR's Info.plist injection approach.
• Fix iOS OAuth redirect stuck on success screen #444: Adds OAuth redirect flow that utilizes the cloud.opensecret.maple custom URL scheme configured by this PR.

Poem

🐰 Through plist files I hop and weave,
Custom schemes we'll now retrieve,
Build-time magic, swift and true,
Cloud scheme paths in iOS too,
Deep links now will see us through! 🔗✨

🚥 Pre-merge checks | ✅ 2

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and specifically describes the main fix: preserving a custom URL scheme in iOS Info.plist to resolve OAuth deep linking issues, which directly aligns with the primary changes in the changeset.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

• 📝 Generate docstrings (stacked PR)
• 📝 Generate docstrings (commit on current branch)

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch fix/ios-url-scheme-build

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[AnthonyRonning]

@TestFlight build

[github-actions]

🚀 TestFlight deployment triggered! Check the Actions tab for progress.

[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

View in Devin Review to see 3 additional findings.

[github-actions]

✅ TestFlight deployment completed successfully!