Add MacPorts as an option for the travis/deps.sh script

.travis/deps.sh

@@ -6,6 +6,11 @@ install_osx() {
         vde cmake gnu-getopt coreutils zlib
 }
 
+install_macports() {
+    sudo port install pkgconfig pcre libpng libedit libsdl2 freetype libsdl2_ttf \
+        vde2 cmake util-linux coreutils zlib
+}
+
 install_arch_linux() {
     sudo pacman -S --noconfirm pkgconf
     sudo pacman -S --noconfirm pcre libpng libedit
@@ -66,7 +71,7 @@ install_clang64() {
 
 
 case "$1" in
-  osx|linux|mingw64|ucrt64|clang64)
+  osx|macports|linux|mingw64|ucrt64|clang64)
     install_"$1"
     ;;
   arch-linux)

README-CMake.md

@@ -285,6 +285,12 @@ binaries.
     $ sudo sh .travis/deps.sh osx
     ```
 
+  - macOS MacPorts:
+
+    ```bash
+    $ sudo sh .travis/deps.sh macports
+    ```
+
   - MinGW-w64 Win64 console:
 
     ```bash