Introduce code from Rust monorepo. This is a mess

tts/NeMo/Dockerfile

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+# syntax=docker/dockerfile:experimental
+
+# Copyright (c) 2019, NVIDIA CORPORATION. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+ARG BASE_IMAGE=nvcr.io/nvidia/pytorch:21.05-py3
+
+
+# build an image that includes only the nemo dependencies, ensures that dependencies
+# are included first for optimal caching, and useful for building a development
+# image (by specifying build target as `nemo-deps`)
+FROM ${BASE_IMAGE} as nemo-deps
+
+# Ensure apt-get won't prompt for selecting options
+ENV DEBIAN_FRONTEND=noninteractive
+RUN apt-get update && \
+    apt-get install -y \
+    libsndfile1 sox \
+    libfreetype6 \
+    python-setuptools swig \
+    python-dev ffmpeg && \
+    rm -rf /var/lib/apt/lists/*
+
+# uninstall stuff from base container
+RUN pip uninstall -y sacrebleu torchtext
+
+# build torchaudio (change latest release version to match pytorch)
+WORKDIR /tmp/torchaudio_build
+RUN git clone --depth 1 --branch release/0.7 https://github.com/pytorch/audio.git && \
+    cd audio && \
+    BUILD_SOX=1 python setup.py install && \
+    cd .. && rm -r audio
+
+# TODO: remove when 21.04 container is released
+# build torchtext
+WORKDIR /tmp/torchtext_build
+RUN git clone --branch v0.8.1 https://github.com/pytorch/text.git && \
+    cd text && \
+    git submodule update --init --recursive && \
+    python setup.py clean install && \
+    cd .. && rm -r text
+
+#install TRT tools: PT quantization support and ONNX graph optimizer
+WORKDIR /tmp/trt_build
+RUN git clone https://github.com/NVIDIA/TensorRT.git && \
+    cd TensorRT/tools/onnx-graphsurgeon && python setup.py install && \
+    cd ../pytorch-quantization && \
+    python setup.py install && \
+    rm -fr  /tmp/trt_build
+
+# install nemo dependencies
+WORKDIR /tmp/nemo
+COPY requirements .
+RUN for f in $(ls requirements*.txt); do pip install --disable-pip-version-check --no-cache-dir -r $f; done
+
+# install nemo_text_processing dependencies
+COPY nemo_text_processing /tmp/nemo/nemo_text_processing/
+RUN /bin/bash /tmp/nemo/nemo_text_processing/setup.sh
+
+# copy nemo source into a scratch image
+FROM scratch as nemo-src
+COPY . .
+
+# start building the final container
+FROM nemo-deps as nemo
+ARG NEMO_VERSION=1.0.2
+
+# Check that NEMO_VERSION is set. Build will fail without this. Expose NEMO and base container
+# version information as runtime environment variable for introspection purposes
+RUN /usr/bin/test -n "$NEMO_VERSION" && \
+    /bin/echo "export NEMO_VERSION=${NEMO_VERSION}" >> /root/.bashrc && \
+    /bin/echo "export BASE_IMAGE=${BASE_IMAGE}" >> /root/.bashrc
+RUN --mount=from=nemo-src,target=/tmp/nemo cd /tmp/nemo && pip install ".[all]" && \
+    python -c "import nemo.collections.asr as nemo_asr" && \
+    python -c "import nemo.collections.nlp as nemo_nlp" && \
+    python -c "import nemo.collections.tts as nemo_tts" && \
+    python -c "import nemo_text_processing.text_normalization as text_normalization"
+
+# TODO: Remove once 21.04 container is base container
+# install latest numba version
+RUN conda update -c numba numba -y
+
+# copy scripts/examples/tests into container for end user
+WORKDIR /workspace/nemo
+COPY scripts /workspace/nemo/scripts
+COPY examples /workspace/nemo/examples
+COPY tests /workspace/nemo/tests
+COPY tutorials /workspace/nemo/tutorials
+# COPY README.rst LICENSE /workspace/nemo/
+
+RUN printf "#!/bin/bash\njupyter lab --no-browser --allow-root --ip=0.0.0.0" >> start-jupyter.sh && \
+    chmod +x start-jupyter.sh
+