Add docker build guide (#24)

Author: PiecePaperCode

SourceCode/Builds/build_with_msvc6_on_docker.md

@@ -0,0 +1,124 @@
+# Build Command & Conquer Zero Hour on Docker with VC6
+
+Docker is a popular platform to standertize environments.
+In this case docker is used to to gather all the dependency's
+and compile a **zerohour.exe** windows executable that you
+can now run directly on windows or on wine.
+
+## Prerequisites
+
+You need to know how to execute docker commands and a basic understanding
+how docker works and how to customize the the dockerfile if you want to
+compile your own code with it.
+
+## Dockerfile
+
+On your project folder create a file named `Dockerfile` and copy the
+following content inside of it and save the file.
+
+```docker
+FROM ubuntu:24.10
+
+WORKDIR /build
+
+# Install utils
+RUN apt update
+RUN apt install wget gpg unzip git -y
+
+# Install wine32
+RUN dpkg --add-architecture i386
+RUN mkdir -pm755 /etc/apt/keyrings
+RUN wget -O - https://dl.winehq.org/wine-builds/winehq.key | gpg --dearmor -o /etc/apt/keyrings/winehq-archive.key -
+RUN wget -NP /etc/apt/sources.list.d/ https://dl.winehq.org/wine-builds/ubuntu/dists/oracular/winehq-oracular.sources
+RUN apt update
+RUN apt install --install-recommends winehq-stable -y
+
+WORKDIR /build/tools/
+
+# Install cmake windows
+RUN wget https://github.com/Kitware/CMake/releases/download/v3.31.6/cmake-3.31.6-windows-x86_64.zip
+RUN unzip cmake-3.31.6-windows-x86_64.zip -d /build/tools/
+RUN mv /build/tools/cmake-3.31.6-windows-x86_64 /build/tools/cmake
+
+# Install git windows
+RUN wget https://github.com/git-for-windows/git/releases/download/v2.49.0-rc1.windows.1/MinGit-2.49.0-rc1-64-bit.zip
+RUN unzip MinGit-2.49.0-rc1-64-bit.zip -d /build/tools/
+RUN mv /build/tools/cmd /build/tools/git
+
+# Install Visual Studio 6 Portable
+RUN wget https://github.com/itsmattkc/MSVC600/archive/refs/heads/master.zip
+RUN unzip master.zip -d /build/tools
+RUN mv /build/tools/MSVC600-master/ /build/tools/vs6
+
+WORKDIR /build
+
+# Setup wine prefix
+ENV WINEDEBUG=-all
+ENV WINEARCH=win64
+ENV WINEPREFIX=/build/prefix64
+RUN wineboot
+
+# Create empty TEMP folder for linking
+RUN mkdir /build/tmp
+ENV TMP="Z:\\build\\tmp"
+ENV TEMP="Z:\\build\\tmp"
+ENV TEMPDIR="Z:\\build\\tmp"
+
+# Setup Visual Studio 6 Environment variables
+ENV VS="Z:\\build\\tools\\vs6"
+ENV MSVCDir="$VS\\vc98"
+ENV WINEPATH="C:\\windows\\system32;\
+$VS\\vc98\\bin;\
+$VS\\vc98\\lib;\
+$VS\\vc98\\include;\
+$VS\\common\\Tools;\
+$VS\\common\\MSDev98\\bin"
+ENV LIB="$VS\\vc98\\Lib;$VS\\vc98\\MFC\\Lib;Z:\\build\\cnc\\build\\vc6"
+ENV INCLUDE="$VS\\vc98\\ATL\\INCLUDE;\
+$VS\\vc98\\INCLUDE;\
+$VS\\vc98\\MFC\\INCLUDE;\
+$VS\\vc98\\Include"
+ENV CC="$VS\\vc98\\bin\\CL.exe"
+ENV CXX="$VS\\vc98\\bin\\CL.exe"
+
+# Clone the source code
+ENV GIT_VERSION_STRING="2.49.0"
+RUN git clone https://github.com/OmniBlade/CnC_Generals_Zero_Hour.git
+RUN mv /build/CnC_Generals_Zero_Hour /build/cnc
+
+WORKDIR /build/cnc
+
+# Switch to WIP branch
+RUN git switch blade/cmake-build
+
+# Run cmake
+RUN wine /build/tools/cmake/bin/cmake.exe \
+    --preset vc6 \
+    -DCMAKE_SYSTEM="Windows" \
+    -DCMAKE_SYSTEM_NAME="Windows" \
+    -DCMAKE_SIZEOF_VOID_P=4 \
+    -DCMAKE_MAKE_PROGRAM="Z:/build/tools/vs6/vc98/bin/nmake.exe" \
+    -DCMAKE_C_COMPILER="Z:/build/tools/vs6/vc98/bin/cl.exe" \
+    -DCMAKE_CXX_COMPILER="Z:/build/tools/vs6/vc98/bin/cl.exe" \
+    -DGIT_EXECUTABLE="Z:/build/tools/git/git.exe" \
+    -DCMAKE_FIND_ROOT_PATH_MODE_PROGRAM=NEVER \
+    -DCMAKE_FIND_ROOT_PATH_MODE_LIBRARY=ONLY \
+    -DCMAKE_FIND_ROOT_PATH_MODE_INCLUDE=ONLY \
+    -DCMAKE_FIND_ROOT_PATH_MODE_PACKAGE=ONLY \
+    -DCMAKE_C_COMPILER_WORKS=1 \
+    -DCMAKE_CXX_COMPILER_WORKS=1
+
+WORKDIR /build/cnc/build/vc6
+
+# Compile
+RUN wine cmd /c "set TMP=Z:\build\tmp& set TEMP=Z:\build\tmp& Z:\build\tools\vs6\VC98\Bin\NMAKE.exe"
+
+# Keep the container alive
+CMD tail -f /dev/null
+```
+
+Build the game by executing `docker build -t zerohour .`
+
+After the build you can run the container and use `docker cp`
+or you could mount a volume to `/build` so you can directly
+compile your own code and copy the binary off.