ci(windows): build binary packages using the vcpkg package

.github/workflows/packages.yml

@@ -182,3 +182,72 @@ jobs:
         with:
           name: macos-${{matrix.pyver}}-macos-${{matrix.macver}}_${{matrix.arch}}
           path: ./wheelhouse/*.whl
+
+
+  build-windows:
+    runs-on: windows-latest
+    if: true
+
+    strategy:
+      fail-fast: false
+      matrix:
+        arch: [win_amd64]
+        pyver: [cp38, cp39, cp310, cp311, cp312, cp313]
+
+    defaults:
+      run:
+        shell: bash
+
+    steps:
+      # there are some other libpq in PATH
+      - name: Drop spurious libpq in the path
+        run: rm -rf c:/tools/php C:/Strawberry/c/bin
+
+      - name: Checkout repo
+        uses: actions/checkout@v4
+
+      - name: Start PostgreSQL service for test
+        run: |
+          $PgSvc = Get-Service "postgresql*"
+          Set-Service $PgSvc.Name -StartupType manual
+          $PgSvc.Start()
+        shell: powershell
+
+      - name: Export GitHub Actions cache environment variables
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const path = require('path')
+            core.exportVariable('ACTIONS_CACHE_URL', process.env.ACTIONS_CACHE_URL || '');
+            core.exportVariable('ACTIONS_RUNTIME_TOKEN', process.env.ACTIONS_RUNTIME_TOKEN || '');
+            core.addPath(path.join(process.env.VCPKG_INSTALLATION_ROOT, 'installed/x64-windows-release/lib'));
+            core.addPath(path.join(process.env.VCPKG_INSTALLATION_ROOT, 'installed/x64-windows-release/bin'));
+
+      # TODO: patch to psycopg2-binary
+      # - name: Create the binary package source tree
+      #   run: python3 ./tools/build/copy_to_binary.py
+
+      - name: Build wheels
+        uses: pypa/cibuildwheel@v2.22.0
+        env:
+          VCPKG_BINARY_SOURCES: "clear;x-gha,readwrite" # cache vcpkg
+          CIBW_BUILD: ${{matrix.pyver}}-${{matrix.arch}}
+          CIBW_ARCHS_WINDOWS: AMD64 x86
+          CIBW_BEFORE_BUILD_WINDOWS: '.\scripts\build\wheel_win32_before_build.bat'
+          CIBW_REPAIR_WHEEL_COMMAND_WINDOWS: >-
+            delvewheel repair -w {dest_dir}
+            --no-mangle "libiconv-2.dll;libwinpthread-1.dll" {wheel}
+          CIBW_TEST_COMMAND: >-
+            set PYTHONPATH={project} &&
+            python -c "import tests; tests.unittest.main(defaultTest='tests.test_suite')"
+          # Note: no fast test because we don't run Windows tests
+          CIBW_ENVIRONMENT_WINDOWS: >-
+            PSYCOPG2_TESTDB=postgres
+            PSYCOPG2_TESTDB_USER=postgres
+            PSYCOPG2_TESTDB_HOST=localhost
+
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: windows-${{matrix.pyver}}-${{matrix.arch}}
+          path: ./wheelhouse/*.whl

.github/workflows/tests.yml

@@ -10,6 +10,7 @@ on:
 jobs:
   linux:
     runs-on: ubuntu-latest
+    if: true
 
     strategy:
       fail-fast: false

scripts/build/pg_config_vcpkg_stub/pg_config_vcpkg_stub/__init__.py

@@ -0,0 +1,79 @@
+#!/usr/bin/env python
+"""
+We use vcpkg in github actions to build psycopg-binary.
+
+This is a stub to work as `pg_config --libdir` or `pg_config --includedir` to
+make it work with vcpkg.
+
+You will need install `vcpkg`, set `VCPKG_ROOT` env, and run `vcpkg install
+libpq:x64-windows-release` before using this script.
+"""
+
+import os
+import sys
+import platform
+from pathlib import Path
+from argparse import ArgumentParser, Namespace, RawDescriptionHelpFormatter
+
+
+class ScriptError(Exception):
+    """Controlled exception raised by the script."""
+
+
+def _main() -> None:
+    # only x64-windows
+    if not (sys.platform == "win32" and platform.machine() == "AMD64"):
+        raise ScriptError("this script should only be used in x64-windows")
+
+    vcpkg_root = os.environ.get(
+        "VCPKG_ROOT", os.environ.get("VCPKG_INSTALLATION_ROOT", "")
+    )
+    if not vcpkg_root:
+        raise ScriptError("VCPKG_ROOT/VCPKG_INSTALLATION_ROOT env var not specified")
+    vcpkg_platform_root = (Path(vcpkg_root) / "installed/x64-windows-release").resolve()
+
+    args = parse_cmdline()
+
+    if args.libdir:
+        if not (f := vcpkg_platform_root / "lib/libpq.lib").exists():
+            raise ScriptError(f"libpq library not found: {f}")
+        print(vcpkg_platform_root.joinpath("lib"))
+
+    elif args.includedir:
+        if not (d := vcpkg_platform_root / "include/libpq").is_dir():
+            raise ScriptError(f"libpq include directory not found: {d}")
+        print(vcpkg_platform_root.joinpath("include"))
+
+    else:
+        raise ScriptError("command not handled")
+
+
+def parse_cmdline() -> Namespace:
+    parser = ArgumentParser(
+        description=__doc__, formatter_class=RawDescriptionHelpFormatter
+    )
+    g = parser.add_mutually_exclusive_group(required=True)
+    g.add_argument(
+        "--libdir",
+        action="store_true",
+        help="show location of object code libraries",
+    )
+    g.add_argument(
+        "--includedir",
+        action="store_true",
+        help="show location of C header files of the client interfaces",
+    )
+    opt = parser.parse_args()
+    return opt
+
+
+def main() -> None:
+    try:
+        _main()
+    except ScriptError as e:
+        print(f"ERROR: {e}.", file=sys.stderr)
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()

scripts/build/pg_config_vcpkg_stub/pyproject.toml

@@ -0,0 +1,11 @@
+[build-system]
+requires = ["setuptools"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = 'pg_config_vcpkg_stub'
+version = "0"
+description = "see docs string in pg_config_vcpkg_stub for more details"
+
+[project.scripts]
+pg_config = 'pg_config_vcpkg_stub:main'

scripts/build/wheel_win32_before_build.bat

@@ -0,0 +1,7 @@
+@echo on
+
+pip install delvewheel wheel
+
+vcpkg install libpq:x64-windows-release
+
+pipx install .\scripts\build\pg_config_vcpkg_stub\