Add x264 test script

.gitignore

@@ -0,0 +1 @@
+/Dockerfile

base/Dockerfile

@@ -9,3 +9,4 @@ RUN \
     apt-get -y clean
 
 RUN mkdir -p /opt/ffbuild/{lib,bin,include}
+ENV FFBUILD_PREFIX /opt/ffbuild

generate.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+set -e
+
+cd "$(dirname "$0")"
+rm -f Dockerfile
+
+if [[ $# -lt 1 || $# -gt 2 ]]; then
+    echo "Invalid Arguments"
+    exit -1
+fi
+
+TARGET="$1"
+VARIANT="${2:-gpl}"
+REPO="${GITHUB_REPOSITORY:-btbn/ffmpeg-builds}"
+
+to_df() {
+    printf "$@" >> Dockerfile
+    echo >> Dockerfile
+}
+
+REPO="${REPO,,}"
+
+to_df "FROM $REPO/base-$TARGET:latest"
+to_df "ENV TARGET $TARGET"
+to_df "ENV VARIANT $VARIANT"
+to_df "ENV REPO $REPO"
+to_df "ENV FFPREFIX /opt/ffbuild"
+
+for script in scripts.d/*.sh; do
+(
+    SELF="$script"
+    source $script
+    ffbuild_relevant || exit 0
+    ffbuild_dockerstage || exit $?
+)
+done

scripts.d/50-x264.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+
+X264_REPO="https://code.videolan.org/videolan/x264.git"
+X264_COMMIT="db0d417728460c647ed4a847222a535b00d3dbcb"
+
+ffbuild_relevant() {
+    [[ $VARIANT == gpl ]] || return -1
+    return 0
+}
+
+ffbuild_dockerstage() {
+    to_df "ADD $SELF /root/x264.sh"
+    to_df "RUN bash -c 'source /root/x264.sh && ffbuild_dockerbuild'"
+}
+
+ffbuild_dockerbuild() {
+    git clone "$X264_REPO" x264 || return -1
+    pushd x264
+    git checkout "$X264_COMMIT" || return -1
+
+    if [[ $TARGET == win64 ]]; then
+        ./configure --disable-cli --enable-static --enable-pic \
+                    --disable-lavf --disable-swscale \
+                    --host=x86_64-w64-mingw32 --cross-prefix=x86_64-w64-mingw32- \
+                    --prefix="$FFPREFIX" || return -1
+    else
+        echo "Unknown target"
+        return -1
+    fi
+
+    make -j$(nproc) || return -1
+    make install || return -1
+
+    popd
+    rm -rf x264
+}