fix(app, ios): use require_relative for firebase_spm/firebase_json across podspecs

Plain `require '../app/firebase_spm'` resolves relative to the process's
current working directory, not the requiring file's own location -- it only
works today because CocoaPods happens to chdir into each podspec's directory
before eval'ing it. Switch all 16 podspecs (plus the two firebase_json
requires in RNFBApp/RNFBML) to require_relative, which resolves correctly
regardless of Dir.pwd or monorepo hoisting layout. Update the now-stale
hoisting-risk comment in firebase_spm.rb accordingly.

Author: russellwheatley

packages/analytics/RNFBAnalytics.podspec

@@ -1,5 +1,5 @@
 require 'json'
-require '../app/firebase_spm'
+require_relative '../app/firebase_spm'
 package = JSON.parse(File.read(File.join(__dir__, 'package.json')))
 appPackage = JSON.parse(File.read(File.join('..', 'app', 'package.json')))
 

packages/app-check/RNFBAppCheck.podspec

@@ -1,5 +1,5 @@
 require 'json'
-require '../app/firebase_spm'
+require_relative '../app/firebase_spm'
 package = JSON.parse(File.read(File.join(__dir__, 'package.json')))
 appPackage = JSON.parse(File.read(File.join('..', 'app', 'package.json')))
 

packages/app-distribution/RNFBAppDistribution.podspec

@@ -1,5 +1,5 @@
 require 'json'
-require '../app/firebase_spm'
+require_relative '../app/firebase_spm'
 package = JSON.parse(File.read(File.join(__dir__, 'package.json')))
 appPackage = JSON.parse(File.read(File.join('..', 'app', 'package.json')))
 

packages/app/RNFBApp.podspec

@@ -1,6 +1,6 @@
 require 'json'
-require './firebase_json'
-require './firebase_spm'
+require_relative './firebase_json'
+require_relative './firebase_spm'
 package = JSON.parse(File.read(File.join(__dir__, 'package.json')))
 firebase_sdk_version = package['sdkVersions']['ios']['firebase']
 firebase_ios_target = package['sdkVersions']['ios']['iosTarget']

packages/app/firebase_spm.rb

@@ -61,10 +61,12 @@ class << self
     # of this `pod install` process.
     #
     # __dir__ resolves to the directory of this file (packages/app/).
-    # In monorepos with hoisted dependencies or pnpm, the path from other
-    # packages (e.g., `require '../app/firebase_spm'`) must resolve correctly
-    # to this location. If your package manager hoists differently, you may
-    # need to adjust the require path in individual podspecs.
+    # Every other podspec loads this file via `require_relative` (e.g.
+    # `require_relative '../app/firebase_spm'`), which resolves the path
+    # relative to the requiring file's own location rather than the
+    # process's current working directory -- so this always resolves
+    # correctly regardless of monorepo hoisting layout (hoisted
+    # dependencies, pnpm, etc.), with no adjustment needed.
     def url
       @url ||= begin
         app_package_path = File.join(__dir__, 'package.json')

packages/auth/RNFBAuth.podspec

@@ -1,5 +1,5 @@
 require 'json'
-require '../app/firebase_spm'
+require_relative '../app/firebase_spm'
 package = JSON.parse(File.read(File.join(__dir__, 'package.json')))
 appPackage = JSON.parse(File.read(File.join('..', 'app', 'package.json')))
 

packages/crashlytics/RNFBCrashlytics.podspec

@@ -1,5 +1,5 @@
 require 'json'
-require '../app/firebase_spm'
+require_relative '../app/firebase_spm'
 package = JSON.parse(File.read(File.join(__dir__, 'package.json')))
 appPackage = JSON.parse(File.read(File.join('..', 'app', 'package.json')))
 

packages/database/RNFBDatabase.podspec

@@ -1,5 +1,5 @@
 require 'json'
-require '../app/firebase_spm'
+require_relative '../app/firebase_spm'
 package = JSON.parse(File.read(File.join(__dir__, 'package.json')))
 appPackage = JSON.parse(File.read(File.join('..', 'app', 'package.json')))
 

packages/firestore/RNFBFirestore.podspec

@@ -1,5 +1,5 @@
 require 'json'
-require '../app/firebase_spm'
+require_relative '../app/firebase_spm'
 package = JSON.parse(File.read(File.join(__dir__, 'package.json')))
 appPackage = JSON.parse(File.read(File.join('..', 'app', 'package.json')))
 

packages/functions/RNFBFunctions.podspec

@@ -1,5 +1,5 @@
 require 'json'
-require '../app/firebase_spm'
+require_relative '../app/firebase_spm'
 package = JSON.parse(File.read(File.join(__dir__, 'package.json')))
 appPackage = JSON.parse(File.read(File.join('..', 'app', 'package.json')))