reorder CI operations to fail fast and early

Author: arik-so

.github/workflows/swift.yml

@@ -8,15 +8,13 @@ jobs:
         env:
             TOOLCHAIN: stable
         steps:
-            -   name: Install native Rust toolchain, Valgrind, and build utilitis
-                run: |
-                    sudo apt-get update
-                    sudo apt-get -y dist-upgrade
-                    sudo apt-get -y install cargo valgrind lld git g++ clang curl
             -   name: Checkout source code
                 uses: actions/checkout@v2
-            -   name: Install cbindgen
-                run: cargo install --force cbindgen
+            -   name: Copy Swift bindings into sources
+                run: |
+                    mkdir -p ci/LDKSwift/Sources/LDKSwift
+                    cp -a bindings/LDK/. ci/LDKSwift/Sources/LDKSwift
+                    cp -R bindings/batteries ci/LDKSwift/Sources/LDKSwift
             -   name: Checkout Rust-Lightning and LDK-C-Bindings git
                 run: |
                     git config --global user.email "[email protected]"
@@ -27,6 +25,13 @@ jobs:
                     git checkout origin/2021-03-java-bindings-base
                     cd ..
                     git clone https://github.com/lightningdevkit/ldk-c-bindings
+            -   name: Install native Rust toolchain, Valgrind, and build utilitis
+                run: |
+                    sudo apt-get update
+                    sudo apt-get -y dist-upgrade
+                    sudo apt-get -y install cargo valgrind lld git g++ clang curl
+            -   name: Install cbindgen
+                run: cargo install --force cbindgen
             -   name: Install Swift Toolchain
                 run: |
                     curl https://swift.org/builds/swift-5.4.2-release/ubuntu2004/swift-5.4.2-RELEASE/swift-5.4.2-RELEASE-ubuntu20.04.tar.gz > swift-5.4.2-RELEASE-ubuntu20.04.tar.gz
@@ -42,15 +47,12 @@ jobs:
                     cd ..
             -   name: Copy new headers into bindings
                 run: |
+                    mkdir -p ci/LDKCHeaders/Headers/
                     cp ldk-c-bindings/lightning-c-bindings/include/*.h ci/LDKCHeaders/Headers/
                     cp ldk-c-bindings/ldk-net/ldk_net.h ci/LDKCHeaders/Headers/
             -   name: Fix header files
                 run: |
                     python ci/fix_header_includes.py
-            -   name: Copy Swift bindings into sources
-                run: |
-                    cp -a bindings/LDK/. ci/LDKSwift/Sources/LDKSwift
-                    cp -R bindings/batteries ci/LDKSwift/Sources/LDKSwift
             -   name: Build and test bindings
                 run: |
                     cd ci/LDKSwift