Manually compile YAD to reduce image size.

Dockerfile

@@ -20,11 +20,13 @@ ARG DOCKER_IMAGE_VERSION=unknown
 
 # Define software versions.
 ARG FIREFOX_VERSION=83.0-r1
+ARG YAD_VERSION=7.3
 ARG JSONLZ4_VERSION=c4305b8
 ARG LZ4_VERSION=1.8.1.2
 #ARG PROFILE_CLEANER_VERSION=2.36
 
 # Define software download URLs.
+ARG YAD_URL=https://github.com/v1cont/yad/archive/v${YAD_VERSION}.tar.gz
 ARG JSONLZ4_URL=https://github.com/avih/dejsonlz4/archive/${JSONLZ4_VERSION}.tar.gz
 ARG LZ4_URL=https://github.com/lz4/lz4/archive/v${LZ4_VERSION}.tar.gz
 #ARG PROFILE_CLEANER_URL=https://github.com/graysky2/profile-cleaner/raw/v${PROFILE_CLEANER_VERSION}/common/profile-cleaner.in
@@ -62,6 +64,41 @@ RUN \
 #            --upgrade firefox=${FIREFOX_VERSION}
      add-pkg firefox=${FIREFOX_VERSION}
 
+# Install YAD.
+# NOTE: YAD is compiled manually because the version on the Alpine repository
+#       pulls too much dependencies.
+RUN \
+    # Install packages needed by the build.
+    add-pkg --virtual build-dependencies \
+        build-base \
+        autoconf \
+        automake \
+        intltool \
+        curl \
+        gtk+3.0-dev \
+        && \
+    # Set same default compilation flags as abuild.
+    export CFLAGS="-Os -fomit-frame-pointer" && \
+    export CXXFLAGS="$CFLAGS" && \
+    export CPPFLAGS="$CFLAGS" && \
+    export LDFLAGS="-Wl,--as-needed" && \
+    # Download.
+    mkdir yad && \
+    echo "Downloading YAD package..." && \
+    curl -# -L ${YAD_URL} | tar xz --strip 1  -C yad && \
+    # Compile.
+    cd yad && \
+    autoreconf -ivf && intltoolize && \
+    ./configure \
+        --prefix=/usr \
+        && \
+    make && make install && \
+    strip /usr/bin/yad && \
+    cd .. && \
+    # Cleanup.
+    del-pkg build-dependencies && \
+    rm -rf /tmp/* /tmp/.[!.]*
+
 # Install extra packages.
 RUN \
     add-pkg \
@@ -100,7 +137,6 @@ RUN \
 
 # Enable log monitoring.
 RUN \
-    add-pkg yad && \
     sed-patch 's|LOG_FILES=|LOG_FILES=/config/log/firefox/error.log|' /etc/logmonitor/logmonitor.conf && \
     sed-patch 's|STATUS_FILES=|STATUS_FILES=/tmp/.firefox_shm_check,/tmp/.firefox_membarrier_check|' /etc/logmonitor/logmonitor.conf