fix: check undefined handlebar vars in strict mode

.changes/fix-handlebars-strict.md

@@ -0,0 +1,5 @@
+---
+"tauri-mobile": patch
+---
+
+Fix template failing to be rendered due to missing variables on strict mode.

templates/platforms/android-studio/app/build.gradle.kts.hbs

@@ -1,8 +1,8 @@
 plugins {
     id("com.android.application")
     id("rust")
-    {{~#each android-app-plugins}}
-    id("{{this}}"){{/each}}
+    {{#if android-app-plugins}}{{~#each android-app-plugins}}
+    id("{{this}}"){{/each}}{{/if}}
 }
 
 android {
@@ -50,8 +50,8 @@ rust {
 }
 
 dependencies {
-    {{~#each android-app-dependencies-platform}}
-    implementation(platform("{{this}}")){{/each}}
-    {{~#each android-app-dependencies}}
-    implementation("{{this}}"){{/each}}
+    {{#if android-app-dependencies-platform}}{{~#each android-app-dependencies-platform}}
+    implementation(platform("{{this}}")){{/each}}{{/if}}
+    {{#if android-app-dependencies}}{{~#each android-app-dependencies}}
+    implementation("{{this}}"){{/each}}{{/if}}
 }

templates/platforms/android-studio/app/src/main/AndroidManifest.xml.hbs

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
-    {{~#each android-app-permissions}}
-    <uses-permission android:name="{{this}}" />{{/each}}
+    {{#if android-app-permissions}}{{~#each android-app-permissions}}
+    <uses-permission android:name="{{this}}" />{{/each}}{{/if}}
     <application android:hasCode="{{has-code}}" android:supportsRtl="true" android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name" android:theme="@style/AppTheme">
         <activity android:configChanges="orientation|keyboardHidden" android:exported="true"

templates/platforms/android-studio/build.gradle.kts.hbs

@@ -5,8 +5,8 @@ buildscript {
     }
     dependencies {
         classpath("com.android.tools.build:gradle:8.0.0")
-        {{~#each android-project-dependencies}}
-        classpath("{{this}}"){{/each}}
+        {{#if android-project-dependencies}}{{~#each android-project-dependencies}}
+        classpath("{{this}}"){{/each}}{{/if}}
     }
 }
 

templates/platforms/android-studio/settings.gradle.hbs

@@ -1,3 +1,3 @@
 include ':app'
-{{~#each asset-packs}}
-include ':{{this}}'{{/each}}
+{{#if asset-packs}}{{~#each asset-packs}}
+include ':{{this}}'{{/each}}{{/if}}

templates/platforms/xcode/Podfile.hbs

@@ -2,18 +2,18 @@
 
 target '{{app.name}}_iOS' do
 platform :ios, '{{apple.ios-version}}'
-  {{#each ios-pod-options}}{{this}}{{/each}}
+  {{#if ios-pod-options}}{{#each ios-pod-options}}{{this}}{{/each}}{{/if}}
 
   # Pods for {{app.name}}_iOS
-  {{~#each ios-pods}}
-  pod '{{this.name}}'{{#if this.version}}, '{{this.version}}'{{/if}}{{/each}}
+  {{#if ios-pods}}{{~#each ios-pods}}
+  pod '{{this.name}}'{{#if this.version}}, '{{this.version}}'{{/if}}{{/each}}{{/if}}
 end
 
 target '{{app.name}}_macOS' do
 platform :osx, '{{apple.macos-version}}'
-  {{#each macos-pod-options}}{{this}}{{/each}}
+  {{#if macos-pod-options}}{{#each macos-pod-options}}{{this}}{{/each}}{{/if}}
 
   # Pods for {{app.name}}_macOS
-  {{~#each macos-pods}}
-  pod '{{this.name}}'{{#if this.version}}, '{{this.version}}'{{/if}}{{/each}}
+  {{#if macos-pods}}{{~#each macos-pods}}
+  pod '{{this.name}}'{{#if this.version}}, '{{this.version}}'{{/if}}{{/each}}{{/if}}
 end

templates/platforms/xcode/project.yml.hbs

@@ -34,10 +34,10 @@ targets:
       - path: {{app.asset-dir}}
         buildPhase: resources
         type: folder
-      {{~#each asset-catalogs}}
-      - {{prefix-path this}}{{/each}}
-      {{~#each ios-additional-targets}}
-      - path: {{prefix-path this}}{{/each}}
+      {{#if asset-catalogs}}{{~#each asset-catalogs}}
+      - {{prefix-path this}}{{/each}}{{/if}}
+       {{#if ios-additional-targets}}{{~#each ios-additional-targets}}
+      - path: {{prefix-path this}}{{/each}}{{/if}}
     info:
       path: {{app.name}}_iOS/Info.plist
       properties:
@@ -55,8 +55,8 @@ targets:
           - UIInterfaceOrientationLandscapeRight
         CFBundleShortVersionString: {{apple.bundle-version-short}}
         CFBundleVersion: {{apple.bundle-version}}
-        {{~#each apple.plist-pairs}}
-        {{this.key}}: {{this.value}}{{/each}}
+        {{#if apple.plist-pairs}}{{~#each apple.plist-pairs}}
+        {{this.key}}: {{this.value}}{{/each}}{{/if}}
     scheme:
       environmentVariables:
         RUST_BACKTRACE: full
@@ -70,31 +70,31 @@ targets:
       base:
         ENABLE_BITCODE: {{apple.enable-bitcode}}
         ARCHS: [{{join ios-valid-archs}}]
-        VALID_ARCHS: {{~#each ios-valid-archs}} {{this}} {{/each}}
+        VALID_ARCHS: {{#if ios-valid-archs}}{{~#each ios-valid-archs}} {{this}} {{/each}}{{/if}}
         LIBRARY_SEARCH_PATHS[sdk=iphoneos*]: $(inherited) $(PROJECT_DIR)/Sources/aarch64-apple-ios/$(CONFIGURATION)
         LIBRARY_SEARCH_PATHS[sdk=iphonesimulator*]: $(inherited) "{{prefix-path "target/"}}{{ios-sim-arch}}/$(CONFIGURATION)"
         ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES: true
       groups: [app]
     dependencies:
       - framework: lib{{#if app.lib-name}}{{app.lib-name}}{{else}}{{snake-case app.name}}{{/if}}.a
         embed: false
-      {{~#each ios-libraries}}
+      {{#if ios-libraries}}{{~#each ios-libraries}}
       - framework: {{this}}
-        embed: false{{/each}}
-      {{~#each ios-vendor-frameworks}}
-      - framework: {{prefix-path this}}{{/each}}
-      {{~#each ios-vendor-sdks}}
-      - sdk: {{prefix-path this}}{{/each}}
+        embed: false{{/each}}{{/if}}
+      {{#if ios-vendor-frameworks}}{{~#each ios-vendor-frameworks}}
+      - framework: {{prefix-path this}}{{/each}}{{/if}}
+      {{#if ios-vendor-sdks}}{{~#each ios-vendor-sdks}}
+      - sdk: {{prefix-path this}}{{/each}}{{/if}}
       - sdk: CoreGraphics.framework
       - sdk: Metal.framework
       - sdk: MetalKit.framework
       - sdk: QuartzCore.framework
       - sdk: Security.framework
       - sdk: UIKit.framework
-      {{~#each ios-frameworks}}
-      - sdk: {{this}}.framework{{/each}}
+      {{#if ios-frameworks}}{{~#each ios-frameworks}}
+      - sdk: {{this}}.framework{{/each}}{{/if}}
     preBuildScripts:
-      {{~#each ios-pre-build-scripts}}{{#if this.path}}
+      {{#if ios-pre-build-scripts}}{{~#each ios-pre-build-scripts}}{{#if this.path}}
       - path {{this.path}}{{/if}}{{#if this.script}}
       - script: {{this.script}}{{/if}}{{#if this.name}}
         name: {{this.name}}{{/if}}{{#if this.input-files}}
@@ -111,7 +111,7 @@ targets:
         runOnlyWhenInstalling: {{this.run-only-when-installing}}{{/if}}{{#if this.based-on-dependency-analysis}}
         basedOnDependencyAnalysis: {{this.based-on-dependency-analysis}}{{/if}}{{#if this.discovered-dependency-file}}
         discoveredDependencyFile: {{this.discovered-dependency-file}}{{/if}}
-      {{~/each}}
+      {{~/each}}{{/if}}
       - script: |-
           CARGO_APPLE=`which cargo-apple`
           ${CARGO_APPLE} xcode-script -v --platform ${PLATFORM_DISPLAY_NAME:?} --sdk-root ${SDKROOT:?} --framework-search-paths "${FRAMEWORK_SEARCH_PATHS:?}" --header-search-paths "${HEADER_SEARCH_PATHS:?}" --gcc-preprocessor-definitions "${GCC_PREPROCESSOR_DEFINITIONS:?}" --configuration ${CONFIGURATION:?} ${FORCE_COLOR} ${ARCHS:?} ${FEATURES}