ci: fix libclang setup in rust workflow

Author: wysaid

.github/workflows/rust.yml

@@ -49,9 +49,16 @@ jobs:
       run: |
         choco install cmake llvm -y
 
+    - name: Configure LIBCLANG_PATH (Windows)
+      if: matrix.os == 'windows-latest'
+      shell: pwsh
+      run: echo "LIBCLANG_PATH=C:\\Program Files\\LLVM\\bin" >> $env:GITHUB_ENV
+
     - name: Install system dependencies (macOS)
       if: matrix.os == 'macos-latest'
-      run: brew install cmake llvm
+      run: |
+        brew install cmake llvm
+        echo "LIBCLANG_PATH=$(brew --prefix llvm)/lib" >> $GITHUB_ENV
 
     - name: Install Rust toolchain
       uses: actions-rust-lang/setup-rust-toolchain@v1
@@ -94,14 +101,10 @@ jobs:
 
     - name: Build Rust bindings
       working-directory: bindings/rust
-      env:
-        LIBCLANG_PATH: ${{ runner.os == 'Windows' && 'C:\\Program Files\\LLVM\\bin' || '' }}
       run: cargo build --verbose --features static-link
 
     - name: Run tests
       working-directory: bindings/rust
-      env:
-        LIBCLANG_PATH: ${{ runner.os == 'Windows' && 'C:\\Program Files\\LLVM\\bin' || '' }}
       run: cargo test --verbose --features static-link
 
   # Job 2: Source Build (Distribution Mode)
@@ -124,6 +127,25 @@ jobs:
         sudo apt-get update
         sudo apt-get install -y build-essential pkg-config
 
+    - name: Install system dependencies (macOS)
+      if: matrix.os == 'macos-latest'
+      run: brew install llvm
+
+    - name: Install system dependencies (Windows)
+      if: matrix.os == 'windows-latest'
+      run: |
+        choco install llvm -y
+        refreshenv
+
+    - name: Configure LIBCLANG_PATH (Windows)
+      if: matrix.os == 'windows-latest'
+      shell: pwsh
+      run: echo "LIBCLANG_PATH=C:\\Program Files\\LLVM\\bin" >> $env:GITHUB_ENV
+
+    - name: Configure LIBCLANG_PATH (macOS)
+      if: matrix.os == 'macos-latest'
+      run: echo "LIBCLANG_PATH=$(brew --prefix llvm)/lib" >> $GITHUB_ENV
+
     - name: Install Rust toolchain
       uses: actions-rust-lang/setup-rust-toolchain@v1
       with: