Add libssh (#186)

Closes #158

Signed-off-by: nanake <nanake@users.noreply.github.com>

scripts.d/50-libssh.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+
+SCRIPT_REPO="https://git.libssh.org/projects/libssh.git"
+SCRIPT_COMMIT="ac6d2fad4a8bf07277127736367e90387646363f"
+
+ffbuild_enabled() {
+    return 0
+}
+
+ffbuild_dockerbuild() {
+    git-mini-clone "$SCRIPT_REPO" "$SCRIPT_COMMIT" libssh
+    cd libssh
+
+    mkdir build && cd build
+
+    if [[ $TARGET == win* ]]; then
+        export CFLAGS="$CFLAGS -Dgettimeofday=ssh_gettimeofday"
+        export CXXFLAGS="$CFLAGS -Dgettimeofday=ssh_gettimeofday"
+    fi
+
+    cmake -GNinja -DCMAKE_TOOLCHAIN_FILE="$FFBUILD_CMAKE_TOOLCHAIN" -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX="$FFBUILD_PREFIX" \
+        -DBUILD_SHARED_LIBS=OFF \
+        -DWITH_EXAMPLES=OFF -DWITH_SERVER=OFF \
+        -DWITH_SFTP=ON -DWITH_ZLIB=ON ..
+
+    ninja -j$(nproc)
+    ninja install
+
+    {
+        echo "Requires.private: libssl libcrypto zlib"
+        echo "Cflags.private: -DLIBSSH_STATIC"
+    } >> "$FFBUILD_PREFIX"/lib/pkgconfig/libssh.pc
+}
+
+ffbuild_configure() {
+    echo --enable-libssh
+}
+
+ffbuild_unconfigure() {
+    echo --disable-libssh
+}