feat: add sidefx labs by default in the image

houdini/Dockerfile

@@ -12,9 +12,13 @@ ARG HOUDINI_TARBALL=houdini-linux.tar.gz
 # unrelated houdini_installer launcher tool). Current EULA date: 2021-10-13,
 # see https://www.sidefx.com/legal/license-agreement/
 ARG HOUDINI_EULA_DATE=2021-10-13
+# Github release tag at https://github.com/sideeffects/SideFXLabs/releases —
+# pick the newest tag whose target branch is "Development" and whose bundled
+# SideFXLabs.json "enable" range covers this image's Houdini version.
+ARG SIDEFXLABS_VERSION=22.0.440
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
-        sudo procps \
+        sudo procps ca-certificates \
         bc fontconfig wget libasound2 libgl1 libglu1 libglu1-mesa libglx0 \
         libegl1 libatomic1 libxkbfile1 libxcb-cursor0 \
         libice6 libnss3 libopengl0 libpci3 libsm6 libx11-6 libx11-xcb1 \
@@ -43,6 +47,27 @@ RUN chmod +x /usr/local/bin/houdini-run && \
     printf 'if [ -d /opt/hfs ]; then _p="$PWD"; cd /opt/hfs && . ./houdini_setup >/dev/null 2>&1; cd "$_p"; fi\n' \
         > /etc/profile.d/houdini.sh
 
+# SideFX Labs, baked in rather than installed through Houdini's own in-app
+# package installer. That installer writes into $HOUDINI_USER_PREF_DIR
+# (under $HOME), which distrobox bind-mounts from the host over whatever the
+# image ships there — so anything baked in under $HOME would just be
+# shadowed at runtime, and doing it live means every container needs its own
+# git-clone/download at first launch (this is also almost certainly the
+# actual source of the "no such file or directory": the installer shells out
+# to `git`, which this image never installed).
+# $HFS/packages is a package-search path Houdini scans unconditionally,
+# independent of $HOME (see `houdini/ref/plugins.html` in SideFX's docs), so
+# drop the official package descriptor + the Labs tree there untouched: the
+# descriptor's default `$HOUDINI_PACKAGE_PATH/SideFXLabs22.0` already
+# resolves correctly since HOUDINI_PACKAGE_PATH is just "wherever this json
+# file lives".
+RUN mkdir -p /opt/hfs/packages/SideFXLabs22.0 && \
+    wget -qO /tmp/sidefxlabs.tar.gz \
+        "https://github.com/sideeffects/SideFXLabs/archive/refs/tags/${SIDEFXLABS_VERSION}.tar.gz" && \
+    tar xzf /tmp/sidefxlabs.tar.gz --strip-components=1 -C /opt/hfs/packages/SideFXLabs22.0 && \
+    cp /opt/hfs/packages/SideFXLabs22.0/SideFXLabs.json /opt/hfs/packages/SideFXLabs22.0.json && \
+    rm /tmp/sidefxlabs.tar.gz
+
 FROM base AS amd
 RUN apt-get update && apt-get install -y --no-install-recommends \
         libgl1-mesa-dri libglx-mesa0 mesa-vulkan-drivers && \