ci: compile against libssh2 on windows

.github/workflows/main.yml

@@ -176,19 +176,25 @@ jobs:
         - name: "Windows (amd64, Visual Studio)"
           id: windows-amd64-vs
           os: windows-2019
+          setup-script: win32
           env:
             ARCH: amd64
             CMAKE_GENERATOR: Visual Studio 16 2019
-            CMAKE_OPTIONS: -A x64 -DWIN32_LEAKCHECK=ON -DDEPRECATE_HARD=ON
+            CMAKE_OPTIONS: -A x64 -DWIN32_LEAKCHECK=ON -DDEPRECATE_HARD=ON -DUSE_SSH=ON -DCMAKE_PREFIX_PATH=D:\Temp\libssh2
+            BUILD_PATH: C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Program Files (x86)\CMake\bin;D:\Temp\libssh2\bin
+            BUILD_TEMP: D:\Temp
             SKIP_SSH_TESTS: true
             SKIP_NEGOTIATE_TESTS: true
         - name: "Windows (x86, Visual Studio)"
           id: windows-x86-vs
           os: windows-2019
+          setup-script: win32
           env:
             ARCH: x86
             CMAKE_GENERATOR: Visual Studio 16 2019
-            CMAKE_OPTIONS: -A Win32 -DWIN32_LEAKCHECK=ON -DDEPRECATE_HARD=ON -DUSE_SHA1=HTTPS -DUSE_BUNDLED_ZLIB=ON
+            CMAKE_OPTIONS: -A Win32 -DWIN32_LEAKCHECK=ON -DDEPRECATE_HARD=ON -DUSE_SHA1=HTTPS -DUSE_BUNDLED_ZLIB=ON -DUSE_SSH=ON -DCMAKE_PREFIX_PATH=D:\Temp\libssh2
+            BUILD_PATH: C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Program Files (x86)\CMake\bin;D:\Temp\libssh2\bin
+            BUILD_TEMP: D:\Temp
             SKIP_SSH_TESTS: true
             SKIP_NEGOTIATE_TESTS: true
         - name: "Windows (amd64, mingw)"

ci/setup-win32-build.sh

+#!/bin/sh
+
+set -ex
+
+echo "##############################################################################"
+echo "## Downloading libssh2"
+echo "##############################################################################"
+
+BUILD_TEMP=${BUILD_TEMP:=$TEMP}
+BUILD_TEMP=$(cygpath $BUILD_TEMP)
+
+case "$ARCH" in
+	amd64)
+		LIBSSH2_URI="https://github.com/libgit2/ci-dependencies/releases/download/2023-02-01/libssh2-20230201-amd64.zip";;
+	x86)
+		LIBSSH2_URI="https://github.com/libgit2/ci-dependencies/releases/download/2023-02-01-v2/libssh2-20230201-x86.zip";;
+esac
+
+if [ -z "$LIBSSH2_URI" ]; then
+	echo "No URL"
+	exit 1
+fi
+
+mkdir -p "$BUILD_TEMP"
+
+curl -s -L "$LIBSSH2_URI" -o "$BUILD_TEMP"/libssh2-"$ARCH".zip
+unzip -q "$BUILD_TEMP"/libssh2-"$ARCH".zip -d "$BUILD_TEMP"