From e20a907e3147339b742ff39f4bcf943989e69b52 Mon Sep 17 00:00:00 2001
From: BtbN <btbn@btbn.de>
Date: Mon, 5 Apr 2021 18:46:32 +0200
Subject: [PATCH 01/11] Use Docker BuildKit

---
 .github/workflows/build.yml | 3 +++
 .github/workflows/pr.yml    | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c369d30..a0b8d4c 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -7,6 +7,9 @@ on:
   schedule:
     - cron: '0 12 * * *'
 
+env:
+  DOCKER_BUILDKIT: 1
+
 jobs:
   purge_artifacts:
     name: Purge old artifacts
diff --git a/.github/workflows/pr.yml b/.github/workflows/pr.yml
index 91dea4d..4e535c4 100644
--- a/.github/workflows/pr.yml
+++ b/.github/workflows/pr.yml
@@ -4,6 +4,9 @@ on:
     branches:
       - master
 
+env:
+  DOCKER_BUILDKIT: 1
+
 jobs:
   build:
     name: Build ffmpeg

From e38500bb7df272ed0186f6af7cf4c3f8581d52d8 Mon Sep 17 00:00:00 2001
From: BtbN <btbn@btbn.de>
Date: Mon, 5 Apr 2021 19:22:03 +0200
Subject: [PATCH 02/11] Use BuildKit features to reduce amount of layers

---
 images/base/run_stage.sh      | 4 ++--
 scripts.d/10-mingw.sh         | 5 -----
 scripts.d/20-libiconv.sh      | 5 -----
 scripts.d/20-zlib.sh          | 5 -----
 scripts.d/21-libxml2.sh       | 5 -----
 scripts.d/25-freetype.sh      | 5 -----
 scripts.d/25-fribidi.sh       | 5 -----
 scripts.d/25-gmp.sh           | 5 -----
 scripts.d/25-libogg.sh        | 5 -----
 scripts.d/25-openssl.sh       | 5 -----
 scripts.d/25-xz.sh            | 5 -----
 scripts.d/35-fontconfig.sh    | 5 -----
 scripts.d/40-fftw3.sh         | 5 -----
 scripts.d/45-harfbuzz.sh      | 5 -----
 scripts.d/45-libsamplerate.sh | 5 -----
 scripts.d/45-libudfread.sh    | 5 -----
 scripts.d/45-lv2.sh           | 5 -----
 scripts.d/45-opencl.sh        | 5 -----
 scripts.d/45-serd.sh          | 5 -----
 scripts.d/45-vmaf.sh          | 5 -----
 scripts.d/45-vulkan.sh        | 6 ++----
 scripts.d/46-sord.sh          | 5 -----
 scripts.d/47-sratom.sh        | 5 -----
 scripts.d/49-libvorbis.sh     | 5 -----
 scripts.d/50-amf.sh           | 5 -----
 scripts.d/50-aom.sh           | 5 -----
 scripts.d/50-avisynth.sh      | 5 -----
 scripts.d/50-dav1d.sh         | 5 -----
 scripts.d/50-davs2.sh         | 5 -----
 scripts.d/50-ffnvcodec.sh     | 5 -----
 scripts.d/50-glslang.sh       | 5 -----
 scripts.d/50-gme.sh           | 5 -----
 scripts.d/50-libass.sh        | 5 -----
 scripts.d/50-libbluray.sh     | 5 -----
 scripts.d/50-libmp3lame.sh    | 5 -----
 scripts.d/50-libopus.sh       | 5 -----
 scripts.d/50-libtheora.sh     | 5 -----
 scripts.d/50-libvpx.sh        | 5 -----
 scripts.d/50-libwebp.sh       | 5 -----
 scripts.d/50-lilv.sh          | 5 -----
 scripts.d/50-mfx.sh           | 5 -----
 scripts.d/50-opencore-amr.sh  | 5 -----
 scripts.d/50-openjpeg.sh      | 5 -----
 scripts.d/50-rav1e.sh         | 5 -----
 scripts.d/50-rubberband.sh    | 5 -----
 scripts.d/50-sdl.sh           | 5 -----
 scripts.d/50-soxr.sh          | 5 -----
 scripts.d/50-srt.sh           | 5 -----
 scripts.d/50-svtav1.sh        | 5 -----
 scripts.d/50-twolame.sh       | 5 -----
 scripts.d/50-uavs3d.sh        | 5 -----
 scripts.d/50-vidstab.sh       | 5 -----
 scripts.d/50-x264.sh          | 5 -----
 scripts.d/50-x265.sh          | 5 -----
 scripts.d/50-xavs2.sh         | 5 -----
 scripts.d/50-xvid.sh          | 5 -----
 scripts.d/50-zimg.sh          | 5 -----
 util/vars.sh                  | 4 ++++
 58 files changed, 8 insertions(+), 281 deletions(-)

diff --git a/images/base/run_stage.sh b/images/base/run_stage.sh
index d51438a..9fe0a97 100755
--- a/images/base/run_stage.sh
+++ b/images/base/run_stage.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 set -xe
 mkdir -p /stage
+source "$1"
 cd /stage
-source /stage.sh
 ffbuild_dockerbuild
-rm -rf /stage /stage.sh "$FFBUILD_PREFIX"/bin
+rm -rf /stage "$FFBUILD_PREFIX"/bin
diff --git a/scripts.d/10-mingw.sh b/scripts.d/10-mingw.sh
index 85b77ca..4a7c198 100755
--- a/scripts.d/10-mingw.sh
+++ b/scripts.d/10-mingw.sh
@@ -8,11 +8,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$MINGW_REPO" "$MINGW_COMMIT" mingw
     cd mingw/mingw-w64-headers
diff --git a/scripts.d/20-libiconv.sh b/scripts.d/20-libiconv.sh
index a0bd22a..bb754d8 100755
--- a/scripts.d/20-libiconv.sh
+++ b/scripts.d/20-libiconv.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     mkdir iconv
     cd iconv
diff --git a/scripts.d/20-zlib.sh b/scripts.d/20-zlib.sh
index afe216c..96520d6 100755
--- a/scripts.d/20-zlib.sh
+++ b/scripts.d/20-zlib.sh
@@ -6,11 +6,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     mkdir zlib
     cd zlib
diff --git a/scripts.d/21-libxml2.sh b/scripts.d/21-libxml2.sh
index b58bb95..2bbf962 100755
--- a/scripts.d/21-libxml2.sh
+++ b/scripts.d/21-libxml2.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$LIBXML2_REPO" "$LIBXML2_COMMIT" libxml2
     cd libxml2
diff --git a/scripts.d/25-freetype.sh b/scripts.d/25-freetype.sh
index 5769c57..af603a3 100755
--- a/scripts.d/25-freetype.sh
+++ b/scripts.d/25-freetype.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     mkdir ft
     cd ft
diff --git a/scripts.d/25-fribidi.sh b/scripts.d/25-fribidi.sh
index c69f463..c106c47 100755
--- a/scripts.d/25-fribidi.sh
+++ b/scripts.d/25-fribidi.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$FRIBIDI_REPO" "$FRIBIDI_COMMIT" fribidi
     cd fribidi
diff --git a/scripts.d/25-gmp.sh b/scripts.d/25-gmp.sh
index 1124954..a82ef5c 100755
--- a/scripts.d/25-gmp.sh
+++ b/scripts.d/25-gmp.sh
@@ -6,11 +6,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     mkdir gmp
     cd gmp
diff --git a/scripts.d/25-libogg.sh b/scripts.d/25-libogg.sh
index 47d0c77..29b5e17 100755
--- a/scripts.d/25-libogg.sh
+++ b/scripts.d/25-libogg.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$OGG_REPO" "$OGG_COMMIT" ogg
     cd ogg
diff --git a/scripts.d/25-openssl.sh b/scripts.d/25-openssl.sh
index 0db996e..3f1a4bb 100755
--- a/scripts.d/25-openssl.sh
+++ b/scripts.d/25-openssl.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$OPENSSL_REPO" "$OPENSSL_COMMIT" openssl
     cd openssl
diff --git a/scripts.d/25-xz.sh b/scripts.d/25-xz.sh
index 952ddc2..20bbe20 100755
--- a/scripts.d/25-xz.sh
+++ b/scripts.d/25-xz.sh
@@ -6,11 +6,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     mkdir xz
     cd xz
diff --git a/scripts.d/35-fontconfig.sh b/scripts.d/35-fontconfig.sh
index 6394756..fe8cc06 100755
--- a/scripts.d/35-fontconfig.sh
+++ b/scripts.d/35-fontconfig.sh
@@ -6,11 +6,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     mkdir fc
     cd fc
diff --git a/scripts.d/40-fftw3.sh b/scripts.d/40-fftw3.sh
index 3222d87..bc310dc 100755
--- a/scripts.d/40-fftw3.sh
+++ b/scripts.d/40-fftw3.sh
@@ -10,11 +10,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     mkdir fftw3
     cd fftw3
diff --git a/scripts.d/45-harfbuzz.sh b/scripts.d/45-harfbuzz.sh
index f6c2cf8..9dfe680 100755
--- a/scripts.d/45-harfbuzz.sh
+++ b/scripts.d/45-harfbuzz.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$HARFBUZZ_REPO" "$HARFBUZZ_COMMIT" harfbuzz
     cd harfbuzz
diff --git a/scripts.d/45-libsamplerate.sh b/scripts.d/45-libsamplerate.sh
index 79c5d1b..ee9539b 100755
--- a/scripts.d/45-libsamplerate.sh
+++ b/scripts.d/45-libsamplerate.sh
@@ -9,11 +9,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$LIBSR_REPO" "$LIBSR_COMMIT" libsr
     cd libsr
diff --git a/scripts.d/45-libudfread.sh b/scripts.d/45-libudfread.sh
index 589505e..666ca60 100755
--- a/scripts.d/45-libudfread.sh
+++ b/scripts.d/45-libudfread.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$LIBUDFREAD_REPO" "$LIBUDFREAD_COMMIT" libudfread
     cd libudfread
diff --git a/scripts.d/45-lv2.sh b/scripts.d/45-lv2.sh
index d10533a..d8d43d7 100755
--- a/scripts.d/45-lv2.sh
+++ b/scripts.d/45-lv2.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$LV2_REPO" "$LV2_COMMIT" lv2
     cd lv2
diff --git a/scripts.d/45-opencl.sh b/scripts.d/45-opencl.sh
index 17d7d1e..e902cdc 100755
--- a/scripts.d/45-opencl.sh
+++ b/scripts.d/45-opencl.sh
@@ -10,11 +10,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     mkdir opencl && cd opencl
 
diff --git a/scripts.d/45-serd.sh b/scripts.d/45-serd.sh
index 075a05b..d62d57e 100755
--- a/scripts.d/45-serd.sh
+++ b/scripts.d/45-serd.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$SERD_REPO" "$SERD_COMMIT" serd
     cd serd
diff --git a/scripts.d/45-vmaf.sh b/scripts.d/45-vmaf.sh
index 2739f20..b298921 100755
--- a/scripts.d/45-vmaf.sh
+++ b/scripts.d/45-vmaf.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$VMAF_REPO" "$VMAF_COMMIT" vmaf
     cd vmaf
diff --git a/scripts.d/45-vulkan.sh b/scripts.d/45-vulkan.sh
index 900830a..63b92b6 100755
--- a/scripts.d/45-vulkan.sh
+++ b/scripts.d/45-vulkan.sh
@@ -8,16 +8,14 @@ ffbuild_enabled() {
 }
 
 ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "ADD patches/vulkan /stage/patches"
-    to_df "RUN run_stage"
+    to_df "RUN --mount=src=${SELF},dst=/stage.sh --mount=src=patches/vulkan,dst=/patches run_stage /stage.sh"
 }
 
 ffbuild_dockerbuild() {
     git clone "$LOADER_REPO" loader
     git -C loader checkout "$LOADER_COMMIT"
 
-    for patch in patches/*.patch; do
+    for patch in /patches/*.patch; do
         echo "Applying $patch"
         git -C loader am -3 < "$patch"
     done
diff --git a/scripts.d/46-sord.sh b/scripts.d/46-sord.sh
index 0b6b17b..0930117 100755
--- a/scripts.d/46-sord.sh
+++ b/scripts.d/46-sord.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$SORD_REPO" "$SORD_COMMIT" sord
     cd sord
diff --git a/scripts.d/47-sratom.sh b/scripts.d/47-sratom.sh
index 340fb74..b325e2f 100755
--- a/scripts.d/47-sratom.sh
+++ b/scripts.d/47-sratom.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$SRATOM_REPO" "$SRATOM_COMMIT" sratom
     cd sratom
diff --git a/scripts.d/49-libvorbis.sh b/scripts.d/49-libvorbis.sh
index a0bc8ef..cdf92d2 100755
--- a/scripts.d/49-libvorbis.sh
+++ b/scripts.d/49-libvorbis.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$VORBIS_REPO" "$VORBIS_COMMIT" vorbis
     cd vorbis
diff --git a/scripts.d/50-amf.sh b/scripts.d/50-amf.sh
index 83ebb89..b40bd84 100755
--- a/scripts.d/50-amf.sh
+++ b/scripts.d/50-amf.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$AMF_REPO" "$AMF_COMMIT" amf
     cd amf
diff --git a/scripts.d/50-aom.sh b/scripts.d/50-aom.sh
index 0ac6cb9..a15bb49 100755
--- a/scripts.d/50-aom.sh
+++ b/scripts.d/50-aom.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$AOM_REPO" "$AOM_COMMIT" aom
     cd aom
diff --git a/scripts.d/50-avisynth.sh b/scripts.d/50-avisynth.sh
index 8061338..475f398 100755
--- a/scripts.d/50-avisynth.sh
+++ b/scripts.d/50-avisynth.sh
@@ -8,11 +8,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$AVISYNTH_REPO" "$AVISYNTH_COMMIT" avisynth
     cd avisynth
diff --git a/scripts.d/50-dav1d.sh b/scripts.d/50-dav1d.sh
index b97da75..11ab209 100755
--- a/scripts.d/50-dav1d.sh
+++ b/scripts.d/50-dav1d.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$DAV1D_REPO" "$DAV1D_COMMIT" dav1d
     cd dav1d
diff --git a/scripts.d/50-davs2.sh b/scripts.d/50-davs2.sh
index 3731427..cabe83a 100755
--- a/scripts.d/50-davs2.sh
+++ b/scripts.d/50-davs2.sh
@@ -9,11 +9,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git clone "$DAVS2_REPO" davs2
     cd davs2
diff --git a/scripts.d/50-ffnvcodec.sh b/scripts.d/50-ffnvcodec.sh
index 01d209c..87b6bf9 100755
--- a/scripts.d/50-ffnvcodec.sh
+++ b/scripts.d/50-ffnvcodec.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$FFNVCODEC_REPO" "$FFNVCODEC_COMMIT" ffnvcodec
     cd ffnvcodec
diff --git a/scripts.d/50-glslang.sh b/scripts.d/50-glslang.sh
index aad706c..1d08426 100755
--- a/scripts.d/50-glslang.sh
+++ b/scripts.d/50-glslang.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$GLSLANG_REPO" "$GLSLANG_COMMIT" glslang
     cd glslang
diff --git a/scripts.d/50-gme.sh b/scripts.d/50-gme.sh
index 0366a25..5a7a0c7 100755
--- a/scripts.d/50-gme.sh
+++ b/scripts.d/50-gme.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git clone "$GME_REPO" gme
     cd gme
diff --git a/scripts.d/50-libass.sh b/scripts.d/50-libass.sh
index d8ef168..29daf7f 100755
--- a/scripts.d/50-libass.sh
+++ b/scripts.d/50-libass.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$ASS_REPO" "$ASS_COMMIT" ass
     cd ass
diff --git a/scripts.d/50-libbluray.sh b/scripts.d/50-libbluray.sh
index 0942bbb..145d980 100755
--- a/scripts.d/50-libbluray.sh
+++ b/scripts.d/50-libbluray.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$LIBBLURAY_REPO" "$LIBBLURAY_COMMIT" libbluray
     cd libbluray
diff --git a/scripts.d/50-libmp3lame.sh b/scripts.d/50-libmp3lame.sh
index f299d2d..28998a3 100755
--- a/scripts.d/50-libmp3lame.sh
+++ b/scripts.d/50-libmp3lame.sh
@@ -6,11 +6,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     mkdir lame
     cd lame
diff --git a/scripts.d/50-libopus.sh b/scripts.d/50-libopus.sh
index 7fb4051..4ecfa02 100755
--- a/scripts.d/50-libopus.sh
+++ b/scripts.d/50-libopus.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$OPUS_REPO" "$OPUS_COMMIT" opus
     cd opus
diff --git a/scripts.d/50-libtheora.sh b/scripts.d/50-libtheora.sh
index 46e9ef9..9ae2a22 100755
--- a/scripts.d/50-libtheora.sh
+++ b/scripts.d/50-libtheora.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$THEORA_REPO" "$THEORA_COMMIT" theora
     cd theora
diff --git a/scripts.d/50-libvpx.sh b/scripts.d/50-libvpx.sh
index fa62b6c..0788a5b 100755
--- a/scripts.d/50-libvpx.sh
+++ b/scripts.d/50-libvpx.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$LIBVPX_REPO" "$LIBVPX_COMMIT" libvpx
     cd libvpx
diff --git a/scripts.d/50-libwebp.sh b/scripts.d/50-libwebp.sh
index 5847f58..c28b398 100755
--- a/scripts.d/50-libwebp.sh
+++ b/scripts.d/50-libwebp.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$WEBP_REPO" "$WEBP_COMMIT" webp
     cd webp
diff --git a/scripts.d/50-lilv.sh b/scripts.d/50-lilv.sh
index c31cd58..5a15b13 100755
--- a/scripts.d/50-lilv.sh
+++ b/scripts.d/50-lilv.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$LILV_REPO" "$LILV_COMMIT" lilv
     cd lilv
diff --git a/scripts.d/50-mfx.sh b/scripts.d/50-mfx.sh
index 4955890..0f64c42 100755
--- a/scripts.d/50-mfx.sh
+++ b/scripts.d/50-mfx.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$MFX_REPO" "$MFX_COMMIT" mfx
     cd mfx
diff --git a/scripts.d/50-opencore-amr.sh b/scripts.d/50-opencore-amr.sh
index 91b1d57..29099bb 100755
--- a/scripts.d/50-opencore-amr.sh
+++ b/scripts.d/50-opencore-amr.sh
@@ -6,11 +6,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     mkdir opencore
     cd opencore
diff --git a/scripts.d/50-openjpeg.sh b/scripts.d/50-openjpeg.sh
index dc89bcf..c3fa832 100755
--- a/scripts.d/50-openjpeg.sh
+++ b/scripts.d/50-openjpeg.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$OPENJPEG_REPO" "$OPENJPEG_COMMIT" openjpeg
     cd openjpeg
diff --git a/scripts.d/50-rav1e.sh b/scripts.d/50-rav1e.sh
index 40c1ead..6a86493 100755
--- a/scripts.d/50-rav1e.sh
+++ b/scripts.d/50-rav1e.sh
@@ -8,11 +8,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$RAV1E_REPO" "$RAV1E_COMMIT" rav1e
     cd rav1e
diff --git a/scripts.d/50-rubberband.sh b/scripts.d/50-rubberband.sh
index d143dcd..f2b8006 100755
--- a/scripts.d/50-rubberband.sh
+++ b/scripts.d/50-rubberband.sh
@@ -8,11 +8,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     mkdir rubberband
     cd rubberband
diff --git a/scripts.d/50-sdl.sh b/scripts.d/50-sdl.sh
index 1cbd674..982ac27 100755
--- a/scripts.d/50-sdl.sh
+++ b/scripts.d/50-sdl.sh
@@ -6,11 +6,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     mkdir sdl
     cd sdl
diff --git a/scripts.d/50-soxr.sh b/scripts.d/50-soxr.sh
index 19d1db6..3086b83 100755
--- a/scripts.d/50-soxr.sh
+++ b/scripts.d/50-soxr.sh
@@ -8,11 +8,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$SOXR_REPO" "$SOXR_COMMIT" soxr
     cd soxr
diff --git a/scripts.d/50-srt.sh b/scripts.d/50-srt.sh
index 3ed3b3e..0488921 100755
--- a/scripts.d/50-srt.sh
+++ b/scripts.d/50-srt.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$SRT_REPO" "$SRT_COMMIT" srt
     cd srt
diff --git a/scripts.d/50-svtav1.sh b/scripts.d/50-svtav1.sh
index 45d266f..8b68225 100755
--- a/scripts.d/50-svtav1.sh
+++ b/scripts.d/50-svtav1.sh
@@ -9,11 +9,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git clone "$SVTAV1_REPO" svtav1
     cd svtav1
diff --git a/scripts.d/50-twolame.sh b/scripts.d/50-twolame.sh
index 8ae383e..170e296 100755
--- a/scripts.d/50-twolame.sh
+++ b/scripts.d/50-twolame.sh
@@ -6,11 +6,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     mkdir twolame
     cd twolame
diff --git a/scripts.d/50-uavs3d.sh b/scripts.d/50-uavs3d.sh
index 9a64017..4651fec 100755
--- a/scripts.d/50-uavs3d.sh
+++ b/scripts.d/50-uavs3d.sh
@@ -9,11 +9,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git clone "$UAVS3D_REPO" uavs3d
     cd uavs3d
diff --git a/scripts.d/50-vidstab.sh b/scripts.d/50-vidstab.sh
index 1eb625a..6c18458 100755
--- a/scripts.d/50-vidstab.sh
+++ b/scripts.d/50-vidstab.sh
@@ -9,11 +9,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$VIDSTAB_REPO" "$VIDSTAB_COMMIT" vidstab
     cd vidstab
diff --git a/scripts.d/50-x264.sh b/scripts.d/50-x264.sh
index cf25a0d..7f4d5b4 100755
--- a/scripts.d/50-x264.sh
+++ b/scripts.d/50-x264.sh
@@ -8,11 +8,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$X264_REPO" "$X264_COMMIT" x264
     cd x264
diff --git a/scripts.d/50-x265.sh b/scripts.d/50-x265.sh
index 36c933f..fc012d6 100755
--- a/scripts.d/50-x265.sh
+++ b/scripts.d/50-x265.sh
@@ -8,11 +8,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git clone "$X265_REPO" x265
     cd x265
diff --git a/scripts.d/50-xavs2.sh b/scripts.d/50-xavs2.sh
index a3b01d8..424e479 100755
--- a/scripts.d/50-xavs2.sh
+++ b/scripts.d/50-xavs2.sh
@@ -9,11 +9,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git clone "$XAVS2_REPO" xavs2
     cd xavs2
diff --git a/scripts.d/50-xvid.sh b/scripts.d/50-xvid.sh
index e8a2728..ca5fe14 100755
--- a/scripts.d/50-xvid.sh
+++ b/scripts.d/50-xvid.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     mkdir xvid
     cd xvid
diff --git a/scripts.d/50-zimg.sh b/scripts.d/50-zimg.sh
index f413cc2..103f87c 100755
--- a/scripts.d/50-zimg.sh
+++ b/scripts.d/50-zimg.sh
@@ -7,11 +7,6 @@ ffbuild_enabled() {
     return 0
 }
 
-ffbuild_dockerstage() {
-    to_df "ADD $SELF /stage.sh"
-    to_df "RUN run_stage"
-}
-
 ffbuild_dockerbuild() {
     git-mini-clone "$ZIMG_REPO" "$ZIMG_COMMIT" zimg
     cd zimg
diff --git a/util/vars.sh b/util/vars.sh
index 6f06fc6..72ea500 100644
--- a/util/vars.sh
+++ b/util/vars.sh
@@ -35,6 +35,10 @@ BASE_IMAGE="${REGISTRY}/${REPO}/base:latest"
 TARGET_IMAGE="${REGISTRY}/${REPO}/base-${TARGET}:latest"
 IMAGE="${REGISTRY}/${REPO}/${TARGET}-${VARIANT}${ADDINS_STR:+-}${ADDINS_STR}:latest"
 
+ffbuild_dockerstage() {
+    to_df "RUN --mount=src=${SELF},dst=/stage.sh run_stage /stage.sh"
+}
+
 ffbuild_configure() {
     return 0
 }

From 56c81f32753fb5dc8c8668239d23cee4583c55c3 Mon Sep 17 00:00:00 2001
From: BtbN <btbn@btbn.de>
Date: Mon, 5 Apr 2021 19:51:41 +0200
Subject: [PATCH 03/11] Migrate to ghcr.io

---
 .github/workflows/build.yml  | 14 +++++++-------
 generate.sh                  |  2 +-
 images/base-win32/Dockerfile |  2 +-
 images/base-win64/Dockerfile |  2 +-
 util/vars.sh                 |  2 +-
 5 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index a0b8d4c..69a5332 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -29,12 +29,12 @@ jobs:
       - name: Login to Docker
         uses: docker/login-action@v1
         with:
-          registry: docker.pkg.github.com
+          registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ github.token }}
       - name: Image Name
         id: imagename
-        run: echo "::set-output name=name::docker.pkg.github.com/${GITHUB_REPOSITORY,,}/base:latest"
+        run: echo "::set-output name=name::ghcr.io/${GITHUB_REPOSITORY,,}/base:latest"
       - name: Pull latest
         run: docker pull ${{ steps.imagename.outputs.name }} || true
       - name: Build base image
@@ -55,12 +55,12 @@ jobs:
       - name: Login to Docker
         uses: docker/login-action@v1
         with:
-          registry: docker.pkg.github.com
+          registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ github.token }}
       - name: Image Name
         id: imagename
-        run: echo "::set-output name=name::docker.pkg.github.com/${GITHUB_REPOSITORY,,}/base-${{ matrix.target }}:latest"
+        run: echo "::set-output name=name::ghcr.io/${GITHUB_REPOSITORY,,}/base-${{ matrix.target }}:latest"
       - name: Pull latest
         run: docker pull ${{ steps.imagename.outputs.name }} || true
       - name: Build target base image
@@ -84,13 +84,13 @@ jobs:
       - name: Login to Docker
         uses: docker/login-action@v1
         with:
-          registry: docker.pkg.github.com
+          registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ github.token }}
       - name: Image Name
         id: imagename
         run: |
-          IMG="docker.pkg.github.com/${GITHUB_REPOSITORY,,}/${{ matrix.target }}-${{ matrix.variant }}:latest"
+          IMG="ghcr.io/${GITHUB_REPOSITORY,,}/${{ matrix.target }}-${{ matrix.variant }}:latest"
           echo "::set-output name=name::${IMG/ /-}"
       - name: Pull latest
         run: docker pull ${{ steps.imagename.outputs.name }} || true
@@ -113,7 +113,7 @@ jobs:
       - name: Login to Docker
         uses: docker/login-action@v1
         with:
-          registry: docker.pkg.github.com
+          registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ github.token }}
       - name: Build ffmpeg
diff --git a/generate.sh b/generate.sh
index 716e7c9..fbfe5ed 100755
--- a/generate.sh
+++ b/generate.sh
@@ -10,7 +10,7 @@ to_df() {
     echo >> Dockerfile
 }
 
-to_df "FROM docker.pkg.github.com/${REPO}/base-${TARGET}:latest"
+to_df "FROM ${REGISTRY}/${REPO}/base-${TARGET}:latest"
 to_df "ENV TARGET=$TARGET VARIANT=$VARIANT REPO=$REPO ADDINS_STR=$ADDINS_STR"
 
 for script in scripts.d/*.sh; do
diff --git a/images/base-win32/Dockerfile b/images/base-win32/Dockerfile
index 6b3c39b..cff8f9c 100644
--- a/images/base-win32/Dockerfile
+++ b/images/base-win32/Dockerfile
@@ -1,5 +1,5 @@
 ARG GH_REPO=btbn/ffmpeg-builds
-FROM docker.pkg.github.com/$GH_REPO/base:latest
+FROM ghcr.io/$GH_REPO/base:latest
 
 ENV DEBIAN_FRONTEND noninteractive
 
diff --git a/images/base-win64/Dockerfile b/images/base-win64/Dockerfile
index eb49e02..df6f12c 100644
--- a/images/base-win64/Dockerfile
+++ b/images/base-win64/Dockerfile
@@ -1,5 +1,5 @@
 ARG GH_REPO=btbn/ffmpeg-builds
-FROM docker.pkg.github.com/$GH_REPO/base:latest
+FROM ghcr.io/$GH_REPO/base:latest
 
 ENV DEBIAN_FRONTEND noninteractive
 
diff --git a/util/vars.sh b/util/vars.sh
index 72ea500..1be3bb1 100644
--- a/util/vars.sh
+++ b/util/vars.sh
@@ -30,7 +30,7 @@ done
 
 REPO="${GITHUB_REPOSITORY:-btbn/ffmpeg-builds}"
 REPO="${REPO,,}"
-REGISTRY="docker.pkg.github.com"
+REGISTRY="ghcr.io"
 BASE_IMAGE="${REGISTRY}/${REPO}/base:latest"
 TARGET_IMAGE="${REGISTRY}/${REPO}/base-${TARGET}:latest"
 IMAGE="${REGISTRY}/${REPO}/${TARGET}-${VARIANT}${ADDINS_STR:+-}${ADDINS_STR}:latest"

From 77f11e2be7658a5d8d7e61230b51a26641bfadc9 Mon Sep 17 00:00:00 2001
From: BtbN <btbn@btbn.de>
Date: Mon, 5 Apr 2021 21:30:32 +0200
Subject: [PATCH 04/11] Disable glslang on 4.3

---
 scripts.d/50-glslang.sh | 1 +
 1 file changed, 1 insertion(+)

diff --git a/scripts.d/50-glslang.sh b/scripts.d/50-glslang.sh
index 1d08426..113bdc2 100755
--- a/scripts.d/50-glslang.sh
+++ b/scripts.d/50-glslang.sh
@@ -4,6 +4,7 @@ GLSLANG_REPO="https://github.com/KhronosGroup/glslang.git"
 GLSLANG_COMMIT="5878bcb17e43bf22cecaf6095900a33ff7f53445"
 
 ffbuild_enabled() {
+    [[ $ADDINS_STR == *4.3* ]] && return -1
     return 0
 }
 

From d3518d093340f817b722eea4dad6be159172beea Mon Sep 17 00:00:00 2001
From: BtbN <btbn@btbn.de>
Date: Mon, 5 Apr 2021 21:37:38 +0200
Subject: [PATCH 05/11] Enable BuildKit inline cache

---
 .github/workflows/build.yml | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 69a5332..faeec1a 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -38,7 +38,7 @@ jobs:
       - name: Pull latest
         run: docker pull ${{ steps.imagename.outputs.name }} || true
       - name: Build base image
-        run: docker build --pull --cache-from ${{ steps.imagename.outputs.name }} --tag ${{ steps.imagename.outputs.name }} images/base
+        run: docker build --pull --build-arg BUILDKIT_INLINE_CACHE=1 --cache-from ${{ steps.imagename.outputs.name }} --tag ${{ steps.imagename.outputs.name }} images/base
       - name: Push base image
         run: docker push ${{ steps.imagename.outputs.name }}
   build_target_bases:
@@ -64,7 +64,7 @@ jobs:
       - name: Pull latest
         run: docker pull ${{ steps.imagename.outputs.name }} || true
       - name: Build target base image
-        run: docker build --pull --build-arg GH_REPO=${GITHUB_REPOSITORY,,} --cache-from ${{ steps.imagename.outputs.name }} --tag ${{ steps.imagename.outputs.name }} images/base-${{ matrix.target }}
+        run: docker build --pull --build-arg BUILDKIT_INLINE_CACHE=1 --build-arg GH_REPO=${GITHUB_REPOSITORY,,} --cache-from ${{ steps.imagename.outputs.name }} --tag ${{ steps.imagename.outputs.name }} images/base-${{ matrix.target }}
       - name: Push target base image
         run: docker push ${{ steps.imagename.outputs.name }}
   build_targets:
@@ -95,7 +95,7 @@ jobs:
       - name: Pull latest
         run: docker pull ${{ steps.imagename.outputs.name }} || true
       - name: Build variant image
-        run: docker build --pull --cache-from ${{ steps.imagename.outputs.name }} --tag ${{ steps.imagename.outputs.name }} .
+        run: docker build --pull --build-arg BUILDKIT_INLINE_CACHE=1 --cache-from ${{ steps.imagename.outputs.name }} --tag ${{ steps.imagename.outputs.name }} .
       - name: Push variant image
         run: docker push ${{ steps.imagename.outputs.name }}
   build_ffmpeg:

From c419c549b9a1db32d307ae5a6ad62f6b41540e78 Mon Sep 17 00:00:00 2001
From: BtbN <btbn@btbn.de>
Date: Tue, 6 Apr 2021 03:41:36 +0200
Subject: [PATCH 06/11] Add fully layered build

---
 generate.sh                                | 72 ++++++++++++++++++----
 scripts.d/10-mingw.sh                      |  8 +++
 scripts.d/{21-libxml2.sh => 20-libxml2.sh} |  0
 util/vars.sh                               |  8 +++
 4 files changed, 77 insertions(+), 11 deletions(-)
 rename scripts.d/{21-libxml2.sh => 20-libxml2.sh} (100%)

diff --git a/generate.sh b/generate.sh
index fbfe5ed..b5ceb93 100755
--- a/generate.sh
+++ b/generate.sh
@@ -5,19 +5,69 @@ source util/vars.sh
 
 rm -f Dockerfile
 
-to_df() {
-    printf "$@" >> Dockerfile
-    echo >> Dockerfile
+layername() {
+    printf "layer-"
+    basename "$1" | sed 's/.sh$//'
 }
 
-to_df "FROM ${REGISTRY}/${REPO}/base-${TARGET}:latest"
+exec_dockerstage() {
+    SCRIPT="$1"
+    (
+        SELF="$SCRIPT"
+        source "$SCRIPT"
+        ffbuild_enabled || exit 0
+        ffbuild_dockerstage || exit $?
+    )
+}
+
+to_df() {
+    _of="${TODF:-Dockerfile}"
+    printf "$@" >> "$_of"
+    echo >> "$_of"
+}
+
+to_df "FROM ${REGISTRY}/${REPO}/base-${TARGET}:latest AS base"
 to_df "ENV TARGET=$TARGET VARIANT=$VARIANT REPO=$REPO ADDINS_STR=$ADDINS_STR"
 
-for script in scripts.d/*.sh; do
-(
-    SELF="$script"
-    source $script
-    ffbuild_enabled || exit 0
-    ffbuild_dockerstage || exit $?
-)
+PREVLAYER="base"
+for ID in $(ls -1d scripts.d/??-* | sed -s 's|^.*/\(..\).*|\1|' | sort -u); do
+    LAYER="layer-$ID"
+
+    for STAGE in scripts.d/$ID-*; do
+        to_df "FROM $PREVLAYER AS $(layername "$STAGE")"
+
+        if [[ -f "$STAGE" ]]; then
+            exec_dockerstage "$STAGE"
+        else
+            for STAGE in "${STAGE}"/??-*; do
+                exec_dockerstage "$STAGE"
+            done
+        fi
+    done
+
+    to_df "FROM $PREVLAYER AS $LAYER"
+    for STAGE in scripts.d/$ID-*; do
+        if [[ -f "$STAGE" ]]; then
+            SCRIPT="$STAGE"
+        else
+            SCRIPTS=( "$STAGE"/??-* )
+            SCRIPT="${SCRIPTS[-1]}"
+        fi
+
+        (
+            SELF="$SCRIPT"
+            SELFLAYER="$(layername "$STAGE")"
+            source "$SCRIPT"
+            ffbuild_enabled || exit 0
+            ffbuild_dockerlayer || exit $?
+            TODF="Dockerfile.final" PREVLAYER="__PREVLAYER__" \
+                ffbuild_dockerfinal || exit $?
+        )
+    done
+
+    PREVLAYER="$LAYER"
 done
+
+to_df "FROM base"
+sed "s/__PREVLAYER__/$PREVLAYER/g" Dockerfile.final | sort -u >> Dockerfile
+rm Dockerfile.final
diff --git a/scripts.d/10-mingw.sh b/scripts.d/10-mingw.sh
index 4a7c198..aba0743 100755
--- a/scripts.d/10-mingw.sh
+++ b/scripts.d/10-mingw.sh
@@ -8,6 +8,14 @@ ffbuild_enabled() {
     return 0
 }
 
+ffbuild_dockerlayer() {
+    to_df "COPY --from=${SELFLAYER} /usr/\$FFBUILD_TOOLCHAIN/. /usr/\$FFBUILD_TOOLCHAIN"
+}
+
+ffbuild_dockerfinal() {
+    to_df "COPY --from=${PREVLAYER} /usr/\$FFBUILD_TOOLCHAIN/. /usr/\$FFBUILD_TOOLCHAIN"
+}
+
 ffbuild_dockerbuild() {
     git-mini-clone "$MINGW_REPO" "$MINGW_COMMIT" mingw
     cd mingw/mingw-w64-headers
diff --git a/scripts.d/21-libxml2.sh b/scripts.d/20-libxml2.sh
similarity index 100%
rename from scripts.d/21-libxml2.sh
rename to scripts.d/20-libxml2.sh
diff --git a/util/vars.sh b/util/vars.sh
index 1be3bb1..f8643e3 100644
--- a/util/vars.sh
+++ b/util/vars.sh
@@ -39,6 +39,14 @@ ffbuild_dockerstage() {
     to_df "RUN --mount=src=${SELF},dst=/stage.sh run_stage /stage.sh"
 }
 
+ffbuild_dockerlayer() {
+    to_df "COPY --from=${SELFLAYER} \$FFBUILD_PREFIX/. \$FFBUILD_PREFIX"
+}
+
+ffbuild_dockerfinal() {
+    to_df "COPY --from=${PREVLAYER} \$FFBUILD_PREFIX/. \$FFBUILD_PREFIX"
+}
+
 ffbuild_configure() {
     return 0
 }

From 487c68037b6e04d9ada09e4357ddf5d3c13cd867 Mon Sep 17 00:00:00 2001
From: BtbN <btbn@btbn.de>
Date: Tue, 6 Apr 2021 03:49:21 +0200
Subject: [PATCH 07/11] Consolidate lilv dependencies into single layer

---
 scripts.d/{45-lv2.sh => 50-lilv/96-lv2.sh}       | 0
 scripts.d/{45-serd.sh => 50-lilv/96-serd.sh}     | 0
 scripts.d/{46-sord.sh => 50-lilv/97-sord.sh}     | 0
 scripts.d/{47-sratom.sh => 50-lilv/98-sratom.sh} | 0
 scripts.d/{50-lilv.sh => 50-lilv/99-lilv.sh}     | 0
 5 files changed, 0 insertions(+), 0 deletions(-)
 rename scripts.d/{45-lv2.sh => 50-lilv/96-lv2.sh} (100%)
 rename scripts.d/{45-serd.sh => 50-lilv/96-serd.sh} (100%)
 rename scripts.d/{46-sord.sh => 50-lilv/97-sord.sh} (100%)
 rename scripts.d/{47-sratom.sh => 50-lilv/98-sratom.sh} (100%)
 rename scripts.d/{50-lilv.sh => 50-lilv/99-lilv.sh} (100%)

diff --git a/scripts.d/45-lv2.sh b/scripts.d/50-lilv/96-lv2.sh
similarity index 100%
rename from scripts.d/45-lv2.sh
rename to scripts.d/50-lilv/96-lv2.sh
diff --git a/scripts.d/45-serd.sh b/scripts.d/50-lilv/96-serd.sh
similarity index 100%
rename from scripts.d/45-serd.sh
rename to scripts.d/50-lilv/96-serd.sh
diff --git a/scripts.d/46-sord.sh b/scripts.d/50-lilv/97-sord.sh
similarity index 100%
rename from scripts.d/46-sord.sh
rename to scripts.d/50-lilv/97-sord.sh
diff --git a/scripts.d/47-sratom.sh b/scripts.d/50-lilv/98-sratom.sh
similarity index 100%
rename from scripts.d/47-sratom.sh
rename to scripts.d/50-lilv/98-sratom.sh
diff --git a/scripts.d/50-lilv.sh b/scripts.d/50-lilv/99-lilv.sh
similarity index 100%
rename from scripts.d/50-lilv.sh
rename to scripts.d/50-lilv/99-lilv.sh

From d98ab0239ea3135435d4ac58925261b25a30a5f6 Mon Sep 17 00:00:00 2001
From: BtbN <btbn@btbn.de>
Date: Tue, 6 Apr 2021 04:38:26 +0200
Subject: [PATCH 08/11] Ensure use of BuildKit

---
 makeimage.sh | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/makeimage.sh b/makeimage.sh
index 6dfd87c..061fea2 100755
--- a/makeimage.sh
+++ b/makeimage.sh
@@ -3,6 +3,8 @@ set -xe
 cd "$(dirname "$0")"
 source util/vars.sh
 
+export DOCKER_BUILDKIT=1
+
 docker build --tag "$BASE_IMAGE" images/base
 docker build --build-arg GH_REPO="$REPO" --tag "$TARGET_IMAGE" "images/base-${TARGET}"
 

From 6aa734be0a931b0cb9d946b6a5de36919e99d8fa Mon Sep 17 00:00:00 2001
From: BtbN <btbn@btbn.de>
Date: Tue, 6 Apr 2021 04:42:56 +0200
Subject: [PATCH 09/11] Fix build flag enumeration of scripts.d with subdirs

---
 build.sh | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/build.sh b/build.sh
index 5d6e4df..6de14e8 100755
--- a/build.sh
+++ b/build.sh
@@ -1,5 +1,6 @@
 #!/bin/bash
 set -xe
+shopt -s globstar
 cd "$(dirname "$0")"
 source util/vars.sh
 
@@ -23,7 +24,7 @@ done
 
 export FFBUILD_PREFIX="$(docker run --rm "$IMAGE" bash -c 'echo $FFBUILD_PREFIX')"
 
-for script in scripts.d/*.sh; do
+for script in scripts.d/**/*.sh; do
     FF_CONFIGURE+=" $(get_output $script configure)"
     FF_CFLAGS+=" $(get_output $script cflags)"
     FF_CXXFLAGS+=" $(get_output $script cxxflags)"

From 8a8d78815d97e13abfdf66c5e5aa092752289f5b Mon Sep 17 00:00:00 2001
From: BtbN <btbn@btbn.de>
Date: Tue, 6 Apr 2021 05:08:33 +0200
Subject: [PATCH 10/11] Shuffle packages into fewer layers

---
 scripts.d/{40-fftw3.sh => 25-fftw3.sh}         | 0
 scripts.d/{49-libvorbis.sh => 45-libvorbis.sh} | 0
 2 files changed, 0 insertions(+), 0 deletions(-)
 rename scripts.d/{40-fftw3.sh => 25-fftw3.sh} (100%)
 rename scripts.d/{49-libvorbis.sh => 45-libvorbis.sh} (100%)

diff --git a/scripts.d/40-fftw3.sh b/scripts.d/25-fftw3.sh
similarity index 100%
rename from scripts.d/40-fftw3.sh
rename to scripts.d/25-fftw3.sh
diff --git a/scripts.d/49-libvorbis.sh b/scripts.d/45-libvorbis.sh
similarity index 100%
rename from scripts.d/49-libvorbis.sh
rename to scripts.d/45-libvorbis.sh

From b2e9d1a9edef06f00edd3f8a47f52cb1c1624c7f Mon Sep 17 00:00:00 2001
From: BtbN <btbn@btbn.de>
Date: Tue, 6 Apr 2021 06:23:15 +0200
Subject: [PATCH 11/11] Reduce MinGW layer size

---
 scripts.d/10-mingw.sh | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/scripts.d/10-mingw.sh b/scripts.d/10-mingw.sh
index aba0743..9f5ca40 100755
--- a/scripts.d/10-mingw.sh
+++ b/scripts.d/10-mingw.sh
@@ -9,11 +9,12 @@ ffbuild_enabled() {
 }
 
 ffbuild_dockerlayer() {
-    to_df "COPY --from=${SELFLAYER} /usr/\$FFBUILD_TOOLCHAIN/. /usr/\$FFBUILD_TOOLCHAIN"
+    to_df "COPY --from=${SELFLAYER} /opt/mingw/. /"
+    to_df "COPY --from=${SELFLAYER} /opt/mingw/. /opt/mingw"
 }
 
 ffbuild_dockerfinal() {
-    to_df "COPY --from=${PREVLAYER} /usr/\$FFBUILD_TOOLCHAIN/. /usr/\$FFBUILD_TOOLCHAIN"
+    to_df "COPY --from=${PREVLAYER} /opt/mingw/. /"
 }
 
 ffbuild_dockerbuild() {
@@ -36,7 +37,7 @@ ffbuild_dockerbuild() {
 
     ./configure "${myconf[@]}"
     make -j$(nproc)
-    make install
+    make install DESTDIR="/opt/mingw"
 
     cd ../mingw-w64-libraries/winpthreads
 
@@ -52,7 +53,7 @@ ffbuild_dockerbuild() {
 
     ./configure "${myconf[@]}"
     make -j$(nproc)
-    make install
+    make install DESTDIR="/opt/mingw"
 }
 
 ffbuild_configure() {