CICD: Add GitHub Action to build the Windows (MXE) Builder Docker Image.

Add a GitHub action that builds the docker image to run builds for the
Windows (MXE) version of Subsurface.
Also update the MXE image Dockerfile to the latest version of MXE, and
add a patch to use a current version of mdbtools.
Configure GitHub actions that do not build docker images to not trigger
on changes to the contents of `scripts/docker/`.

Signed-off-by: Michael Keller <github@ike.ch>

scripts/docker/mxe-build-container/Dockerfile

@@ -1,77 +1,94 @@
 # Build the image using the --build-arg option, e.g.:
 # docker build -t boret/myimage:0.1 --build-arg=mxe_sha=123ABC456 .
-#
 
-# Start from Ubuntu
-From ubuntu:22.04
+FROM ubuntu:22.04 as base
 
-# very often master is broken, so we pass in a known good SHA
-ARG mxe_sha=master
-ENV _ver=${mxe_sha}
-
-# update and set up the packages we need for this cross build
-RUN apt-get update  &&  apt-get upgrade -y && \
-DEBIAN_FRONTEND=noninteractive apt-get install --no-install-recommends -y \
+# update and set up the packages we need for the build
+RUN apt-get update  &&  \
+    apt-get upgrade -y && \
+    apt-get install -y \
     autoconf \
     automake \
     autopoint \
     bash \
     binutils \
-    bison \
     bzip2 \
     ca-certificates \
-    flex \
     g++ \
     g++-multilib \
     gettext \
     git \
-    gperf \
     intltool \
-    libc6-dev-i386 \
-    libgdk-pixbuf2.0-dev \
     libltdl-dev \
     libssl-dev \
     libtool \
     libtool-bin \
-    libxml-parser-perl \
     make \
     openssl \
     p7zip-full \
     patch \
     perl \
     pkg-config \
-    python3 \
-    python3-mako \
-    ruby \
     sed \
     unzip \
     wget \
+    lzip && \
+    apt-get clean
+
+
+FROM base as build
+
+# set up the packages we need additionally for this cross build
+RUN apt-get install -y \
+    bison \
+    flex \
+    gperf \
+    libc6-dev-i386 \
+    libgdk-pixbuf2.0-dev \
+    libxml-parser-perl \
+    python3 \
+    python3-mako \
+    python-is-python3 \
+    ruby \
     xz-utils \
-    lzip \
     scons
 
+# very often master is broken, so we pass in a known good SHA
+ARG mxe_sha=master
+ENV _ver=${mxe_sha}
+
+WORKDIR /win
+
 # checkout MXE at the right version
-RUN mkdir -p /win
-RUN cd /win ; git clone https://github.com/mxe/mxe ; \
-    cd mxe ; \
-    git checkout ${_ver} ;
+RUN git clone https://github.com/mxe/mxe && \
+    cd mxe && \
+    git checkout ${_ver}
+
+WORKDIR /win/mxe
+
+# Move the settings into place to build everything that we need
+ADD settings.mk .
 
 # Patch the qtconnectivity build to explicilty enable native-win32-bluetooth and ensure another
 # backend is not picked
-ADD qtconnectivity-1.patch /win/mxe/src/qtconnectivity-1.patch
+ADD qtconnectivity-1.patch src/
+
+ADD mdbtools_version.patch .
+RUN patch -p1 < mdbtools_version.patch 2>&1 | tee mxe-patch.log
 
-# Move the settings into place to build everything that we need
 # separate download from build so that we can redo the build
-ADD settings.mk /win/mxe/settings.mk
-RUN cd /usr/bin ; ln -s -f python3 python
-RUN cd /win/mxe ; \
-    make -j 6 download 2>&1 | tee mxe-build.log
-RUN cd /win/mxe ; \
-    make -j 6 2>&1 | tee -a mxe-build.log ;
+RUN make -j download 2>&1 | tee mxe-build.log
+
+RUN make -j 2>&1 | tee -a mxe-build.log
 
 # for some reason smtk2ssrf needs a static build of mdbtools
-RUN cd /win/mxe ; \
-    make MXE_TARGETS=x86_64-w64-mingw32.static glib mdbtools -j 6 2>&1 | tee -a mxe-build.log ;
+RUN make MXE_TARGETS=x86_64-w64-mingw32.static glib mdbtools -j 2>&1 | tee -a mxe-build.log
 
-RUN apt-get remove -y bison flex gperf libc6-dev-i386 libgdk-pixbuf2.0-dev libxml-parser-perl python ruby xz-utils scons && rm -rf /var/lib/apt/lists/*
-RUN rm -rf /win/mxe/pkg /win/mxe/log /win/mxe/docs
+RUN rm -rf pkg log docs
+
+
+FROM base as final
+
+WORKDIR /win
+
+COPY --from=build /win/mxe mxe

scripts/docker/mxe-build-container/build-container.sh

@@ -3,7 +3,7 @@ set -x
 set -e
 
 # known good MXE sha
-MXE_SHA="0d21cf2e31d4e6c0"
+MXE_SHA="c0bfefc57a00fdf6cb5278263e21a478e47b0bf5"
 SCRIPTPATH=$(dirname $0)
 
 # version of the docker image

scripts/docker/mxe-build-container/mdbtools_version.patch

@@ -0,0 +1,52 @@
+# Temporary patch to apply to MXE's src/mdbtools.mk file while building docker
+# image, until it's applied upstream at github's MXE repo.
+
+
+diff --git a/src/mdbtools.mk b/src/mdbtools.mk
+index 42d303c2..d9d0f557 100644
+--- a/src/mdbtools.mk
++++ b/src/mdbtools.mk
+@@ -1,19 +1,17 @@
+ # This file is part of MXE. See LICENSE.md for licensing information.
+ 
+ PKG             := mdbtools
+-$(PKG)_WEBSITE  := https://sourceforge.net/projects/mdbtools/
++$(PKG)_WEBSITE  := https://github.com/mdbtools/mdbtools
+ $(PKG)_IGNORE   :=
+-$(PKG)_VERSION  := 0.7.1
+-$(PKG)_CHECKSUM := 4eac1bce55066a38d9ea6c52a8e8ecc101b79afe75118ecc16852990472c4721
+-$(PKG)_SUBDIR   := brianb-mdbtools-f8ce1cc
+-$(PKG)_FILE     := $(PKG)-$($(PKG)_VERSION).tar.gz
+-$(PKG)_URL      := https://github.com/brianb/$(PKG)/tarball/$($(PKG)_VERSION)/$($(PKG)_FILE)
++$(PKG)_VERSION  := 1.0.0
++$(PKG)_CHECKSUM := 3446e1d71abdeb98d41e252777e67e1909b186496fda59f98f67032f7fbcd955
++$(PKG)_GH_CONF  := mdbtools/mdbtools/releases, v
+ $(PKG)_DEPS     := cc glib
+ 
+ define $(PKG)_UPDATE
+-    $(WGET) -q -O- 'https://github.com/brianb/mdbtools/tags' | \
+-    grep '<a href="/brianb/mdbtools/archive/' | \
+-    $(SED) -n 's,.*href="/brianb/mdbtools/archive/\([0-9][^"_]*\)\.tar.*,\1,p' | \
++    $(WGET) -q -O- 'https://github.com/mdbtools/mdbtools/tags' | \
++    grep 'href="/mdbtools/mdbtools/archive/' | \
++    $(SED) -n 's,.*href="/mdbtools/mdbtools/archive/refs/tags/v\([0-9][^"_]*\)\.tar.*,\1,p' | \
+     head -1
+ endef
+ 
+@@ -24,10 +22,11 @@ define $(PKG)_BUILD
+         --build="`config.guess`" \
+         --disable-shared \
+         --disable-man \
++        --without-bash-completion-dir \
+         --prefix='$(PREFIX)/$(TARGET)' \
+         PKG_CONFIG='$(PREFIX)/bin/$(TARGET)-pkg-config'
+-    $(MAKE) -C '$(1)' -j '$(JOBS)' install bin_PROGRAMS= sbin_PROGRAMS= noinst_PROGRAMS= html_DATA= || \
+-    $(MAKE) -C '$(1)' -j 1 install bin_PROGRAMS= sbin_PROGRAMS= noinst_PROGRAMS= html_DATA=
++    $(MAKE) CFLAGS+='-Wno-deprecated-declarations' -C '$(1)' -j '$(JOBS)' install bin_PROGRAMS= sbin_PROGRAMS= noinst_PROGRAMS= html_DATA= || \
++    $(MAKE) CFLAGS+='-Wno-deprecated-declarations' -C '$(1)' -j 1 install bin_PROGRAMS= sbin_PROGRAMS= noinst_PROGRAMS= html_DATA=
+ endef
+ 
+ $(PKG)_BUILD_SHARED =
+-- 
+2.43.0
+

scripts/docker/mxe-build-container/settings.mk

@@ -3,10 +3,10 @@
 
 # This variable controls the number of compilation processes
 # within one package ("intra-package parallelism").
-JOBS := 8
+#JOBS := 8
 
 # This variable controls the targets that will build.
-MXE_TARGETS :=  x86_64-w64-mingw32.shared i686-w64-mingw32.shared
+MXE_TARGETS :=  x86_64-w64-mingw32.shared
 
 # MXE_PLUGIN_DIRS := plugins/gcc10