Checkout and Build against Rust SDK branch only when specified

Author: yogh333

.github/workflows/reusable_build_all_apps.yml

@@ -9,7 +9,7 @@ on:
           type: string
         rust_sdk_branch:
           required: false
-          default: 'master'
+          default: ''
           type: string
     workflow_dispatch:
       inputs:
@@ -19,7 +19,7 @@ on:
           type: string
         rust_sdk_branch:
           required: false
-          default: 'master'
+          default: ''
           type: string
 
 env:
@@ -36,7 +36,7 @@ jobs:
           uses: actions/checkout@v4
           with:
             repository: LedgerHQ/ledger-device-rust-sdk
-            ref: ${{ inputs.rust_sdk_branch }}
+            ref: 'master'
         - name: Set up Python
           uses: actions/setup-python@v4
           with:
@@ -74,6 +74,7 @@ jobs:
             - name: Install ledgered
               run: pip install ledgered --break-system-packages
             - name: Clone SDK
+              if: ${{ inputs.rust_sdk_branch != '' }}
               uses: actions/checkout@v4
               with:
                 path: sdk
@@ -87,7 +88,7 @@ jobs:
                 path: ${{ matrix.app-name }}
             - name: Patch Cargo.toml
               continue-on-error: false
-              if: ${{ inputs.rust_sdk_branch != 'master' }}
+              if: ${{ inputs.rust_sdk_branch != '' }}
               run: |
                 cd ${{ matrix.app-name }}
                 build_directory=$(ledger-manifest --output-build-directory ledger_app.toml)