feat: allow headers when searching (#298)

Closes #295

Author: gadomski

.cargo/config.toml

@@ -0,0 +1,4 @@
+# Fetch a prebuilt libduckdb for the `duckdb` dev-dependency rather than
+# compiling the bundled C++ amalgamation on every cold build.
+[env]
+DUCKDB_DOWNLOAD_LIB = "1"

.github/workflows/ci.yaml

@@ -74,8 +74,7 @@ jobs:
     name: Build (Windows)
     runs-on: windows-latest
     env:
-      MATURIN_PEP517_ARGS: --features duckdb-bundled
-      RUSTFLAGS: -C link-arg=Rstrtmgr.lib
+      DUCKDB_LIB_DIR: ${{ github.workspace }}\opt\duckdb
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
         with:
@@ -87,6 +86,13 @@ jobs:
             pyproject.toml
             uv.lock
       - uses: Swatinem/rust-cache@e18b497796c12c097a38f9edb9d0641fb99eee32 # v2
+      - name: Install libduckdb
+        shell: bash
+        run: |
+          curl -L -o libduckdb-windows-amd64.zip https://github.com/duckdb/duckdb/releases/download/v${{ env.duckdb-version }}/libduckdb-windows-amd64.zip
+          mkdir -p opt/duckdb
+          unzip libduckdb-windows-amd64.zip -d opt/duckdb
+          echo "${{ github.workspace }}\opt\duckdb" >> "$GITHUB_PATH"
       - name: Sync
         run: uv sync
   import: