Merge remote-tracking branch 'upstream/master' into r0.8-update

2020-06-04 08:53:33 +02:00 · 2020-06-04 08:53:33 +02:00 · 797cc2181c
commit 797cc2181c
parent 290649606a 222a25f979
53 changed files with 674 additions and 96 deletions
--- a/.gitignore
+++ b/.gitignore
@ -14,14 +14,21 @@
 /native_client/build
 /native_client/*.egg-info
 /native_client/dist
+/native_client/deepspeech
+/native_client/ds-swig
+/native_client/libdeepspeech.so
 /native_client/node_modules
-/native_client/python/model.py
-/native_client/python/utils.py
-/native_client/python/model_wrap.cpp
-/native_client/python/utils_wrap.cpp
 /native_client/javascript/build
+/native_client/javascript/lib
+/native_client/javascript/package.json
+/native_client/javascript/package-lock.json
 /native_client/javascript/client.js
 /native_client/javascript/deepspeech_wrap.cxx
+/native_client/javascript/node_modules
+/native_client/python/MANIFEST.in
+/native_client/python/dist
+/native_client/python/impl.py
+/native_client/python/impl_wrap.cpp
 /doc/.build/
 /doc/xml-c/
 /doc/xml-java/
--- a/.travis.yml
+++ b/.travis.yml
@ -20,11 +20,3 @@ jobs:
          fi
          cardboardlinter --refspec $TRAVIS_BRANCH -n auto;
        fi
-    - name: python unit tests
-      install:
-        - pip install --upgrade -r requirements_tests.txt;
-          pip install --upgrade .
-      script:
-        - if [ "$TRAVIS_PULL_REQUEST" != "false" ]; then
-            python -m unittest;
-          fi
--- a/bin/import_cv2.py
+++ b/bin/import_cv2.py
@ -7,6 +7,7 @@ DeepSpeech.py
 Use "python3 import_cv2.py -h" for help
 """
 import csv
+import itertools
 import os
 import subprocess
 import unicodedata
@ -30,19 +31,20 @@ SAMPLE_RATE = 16000
 MAX_SECS = 10


-def _preprocess_data(tsv_dir, audio_dir, space_after_every_character=False):
+def _preprocess_data(tsv_dir, audio_dir, filter_obj, space_after_every_character=False):
    exclude = []
    for dataset in ["test", "dev", "train", "validated", "other"]:
-        set_samples = _maybe_convert_set(dataset, tsv_dir, audio_dir, space_after_every_character)
+        set_samples = _maybe_convert_set(dataset, tsv_dir, audio_dir, filter_obj, space_after_every_character)
        if dataset in ["test", "dev"]:
            exclude += set_samples
        if dataset == "validated":
-            _maybe_convert_set("train-all", tsv_dir, audio_dir, space_after_every_character,
+            _maybe_convert_set("train-all", tsv_dir, audio_dir, filter_obj, space_after_every_character,
                               rows=set_samples, exclude=exclude)


-def one_sample(sample):
-    """ Take a audio file, and optionally convert it to 16kHz WAV """
+def one_sample(args):
+    """ Take an audio file, and optionally convert it to 16kHz WAV """
+    sample, filter_obj = args
    mp3_filename = sample[0]
    if not os.path.splitext(mp3_filename.lower())[1] == ".mp3":
        mp3_filename += ".mp3"
@ -58,7 +60,7 @@ def one_sample(sample):
                ["soxi", "-s", wav_filename], stderr=subprocess.STDOUT
            )
        )
-    label = label_filter_fun(sample[1])
+    label = filter_obj.filter(sample[1])
    rows = []
    counter = get_counter()
    if file_size == -1:
@ -82,7 +84,7 @@ def one_sample(sample):
    return (counter, rows)


-def _maybe_convert_set(dataset, tsv_dir, audio_dir, space_after_every_character=None, rows=None, exclude=None):
+def _maybe_convert_set(dataset, tsv_dir, audio_dir, filter_obj, space_after_every_character=None, rows=None, exclude=None):
    exclude_transcripts = set()
    exclude_speakers = set()
    if exclude is not None:
@ -109,7 +111,8 @@ def _maybe_convert_set(dataset, tsv_dir, audio_dir, space_after_every_character=
        print("Importing mp3 files...")
        pool = Pool()
        bar = progressbar.ProgressBar(max_value=num_samples, widgets=SIMPLE_BAR)
-        for i, processed in enumerate(pool.imap_unordered(one_sample, samples), start=1):
+        samples_with_context = itertools.zip_longest(samples, [], fillvalue=filter_obj)
+        for i, processed in enumerate(pool.imap_unordered(one_sample, samples_with_context), start=1):
            counter += processed[0]
            rows += processed[1]
            bar.update(i)
@ -160,50 +163,60 @@ def _maybe_convert_wav(mp3_filename, wav_filename):
        except sox.core.SoxError:
            pass

+class LabelFilter:
+    def __init__(self, normalize, alphabet, validate_fun):
+        self.normalize = normalize
+        self.alphabet = alphabet
+        self.validate_fun = validate_fun

-if __name__ == "__main__":
-    PARSER = get_importers_parser(description="Import CommonVoice v2.0 corpora")
-    PARSER.add_argument("tsv_dir", help="Directory containing tsv files")
-    PARSER.add_argument(
-        "--audio_dir",
-        help='Directory containing the audio clips - defaults to "<tsv_dir>/clips"',
-    )
-    PARSER.add_argument(
-        "--filter_alphabet",
-        help="Exclude samples with characters not in provided alphabet",
-    )
-    PARSER.add_argument(
-        "--normalize",
-        action="store_true",
-        help="Converts diacritic characters to their base ones",
-    )
-    PARSER.add_argument(
-        "--space_after_every_character",
-        action="store_true",
-        help="To help transcript join by white space",
-    )
-
-    PARAMS = PARSER.parse_args()
-    validate_label = get_validate_label(PARAMS)
-
-    AUDIO_DIR = (
-        PARAMS.audio_dir if PARAMS.audio_dir else os.path.join(PARAMS.tsv_dir, "clips")
-    )
-    ALPHABET = Alphabet(PARAMS.filter_alphabet) if PARAMS.filter_alphabet else None
-
-    def label_filter_fun(label):
-        if PARAMS.normalize:
+    def filter(self, label):
+        if self.normalize:
            label = (
                unicodedata.normalize("NFKD", label.strip())
                .encode("ascii", "ignore")
                .decode("ascii", "ignore")
            )
-        label = validate_label(label)
-        if ALPHABET and label:
+        label = self.validate_fun(label)
+        if self.alphabet and label:
            try:
-                ALPHABET.encode(label)
+                self.alphabet.encode(label)
            except KeyError:
                label = None
        return label

-    _preprocess_data(PARAMS.tsv_dir, AUDIO_DIR, PARAMS.space_after_every_character)
+def main():
+    parser = get_importers_parser(description="Import CommonVoice v2.0 corpora")
+    parser.add_argument("tsv_dir", help="Directory containing tsv files")
+    parser.add_argument(
+        "--audio_dir",
+        help='Directory containing the audio clips - defaults to "<tsv_dir>/clips"',
+    )
+    parser.add_argument(
+        "--filter_alphabet",
+        help="Exclude samples with characters not in provided alphabet",
+    )
+    parser.add_argument(
+        "--normalize",
+        action="store_true",
+        help="Converts diacritic characters to their base ones",
+    )
+    parser.add_argument(
+        "--space_after_every_character",
+        action="store_true",
+        help="To help transcript join by white space",
+    )
+
+    params = parser.parse_args()
+    validate_label = get_validate_label(params)
+
+    audio_dir = (
+        params.audio_dir if params.audio_dir else os.path.join(params.tsv_dir, "clips")
+    )
+    alphabet = Alphabet(params.filter_alphabet) if params.filter_alphabet else None
+
+    filter_obj = LabelFilter(params.normalize, alphabet, validate_label)
+    _preprocess_data(params.tsv_dir, audio_dir, filter_obj,
+                     params.space_after_every_character)
+
+if __name__ == "__main__":
+    main()
--- a/native_client/javascript/package.json.in
+++ b/native_client/javascript/package.json.in
@ -32,7 +32,7 @@
        "host"        : "https://community-tc.services.mozilla.com/api/index/v1/task/project.deepspeech.tensorflow.pip.v1.0.0-warpctc.arm/artifacts/public/"
    },
    "dependencies"  : {
-      "node-pre-gyp": "0.14.x",
+      "node-pre-gyp": "0.15.x",
      "argparse": "1.0.x",
      "sox-stream": "2.0.x",
      "memory-stream": "0.0.3",
--- a/taskcluster/.shared.yml
+++ b/taskcluster/.shared.yml
@ -29,6 +29,7 @@ nodejs:
    prep_11: 'echo "deb http://deb.nodesource.com/node_11.x xenial main" > /etc/apt/sources.list.d/nodesource.list && wget -qO- https://deb.nodesource.com/gpgkey/nodesource.gpg.key | apt-key add -'
    prep_12: 'echo "deb http://deb.nodesource.com/node_12.x xenial main" > /etc/apt/sources.list.d/nodesource.list && wget -qO- https://deb.nodesource.com/gpgkey/nodesource.gpg.key | apt-key add -'
    prep_13: 'echo "deb http://deb.nodesource.com/node_13.x xenial main" > /etc/apt/sources.list.d/nodesource.list && wget -qO- https://deb.nodesource.com/gpgkey/nodesource.gpg.key | apt-key add -'
+    prep_14: 'echo "deb http://deb.nodesource.com/node_14.x xenial main" > /etc/apt/sources.list.d/nodesource.list && wget -qO- https://deb.nodesource.com/gpgkey/nodesource.gpg.key | apt-key add -'
  packages_docs_bionic:
    apt: 'nodejs'
    apt_pinning: '(echo "Package: nodejs" && echo "Pin: origin deb.nodesource.com" && echo "Pin-Priority: 999") > /etc/apt/preferences'
@ -41,26 +42,29 @@ nodejs:
    prep_11: 'echo "deb http://deb.nodesource.com/node_11.x buster main" > /etc/apt/sources.list.d/nodesource.list && wget -qO- https://deb.nodesource.com/gpgkey/nodesource.gpg.key | apt-key add -'
    prep_12: 'echo "deb http://deb.nodesource.com/node_12.x buster main" > /etc/apt/sources.list.d/nodesource.list && wget -qO- https://deb.nodesource.com/gpgkey/nodesource.gpg.key | apt-key add -'
    prep_13: 'echo "deb http://deb.nodesource.com/node_13.x buster main" > /etc/apt/sources.list.d/nodesource.list && wget -qO- https://deb.nodesource.com/gpgkey/nodesource.gpg.key | apt-key add -'
+    prep_14: 'echo "deb http://deb.nodesource.com/node_14.x buster main" > /etc/apt/sources.list.d/nodesource.list && wget -qO- https://deb.nodesource.com/gpgkey/nodesource.gpg.key | apt-key add -'
  brew:
-    prep_10: 'export NVM_DIR=$TASKCLUSTER_TASK_DIR/homebrew-tests/.nvm/ && source "$TASKCLUSTER_TASK_DIR/homebrew-tests/opt/nvm/nvm.sh" && nvm use 10.18.1'
+    prep_10: 'export NVM_DIR=$TASKCLUSTER_TASK_DIR/homebrew-tests/.nvm/ && source "$TASKCLUSTER_TASK_DIR/homebrew-tests/opt/nvm/nvm.sh" && nvm use 10.20.1'
    prep_11: 'export NVM_DIR=$TASKCLUSTER_TASK_DIR/homebrew-tests/.nvm/ && source "$TASKCLUSTER_TASK_DIR/homebrew-tests/opt/nvm/nvm.sh" && nvm use 11.15.0'
-    prep_12: 'export NVM_DIR=$TASKCLUSTER_TASK_DIR/homebrew-tests/.nvm/ && source "$TASKCLUSTER_TASK_DIR/homebrew-tests/opt/nvm/nvm.sh" && nvm use 12.8.1'
-    prep_13: 'export NVM_DIR=$TASKCLUSTER_TASK_DIR/homebrew-tests/.nvm/ && source "$TASKCLUSTER_TASK_DIR/homebrew-tests/opt/nvm/nvm.sh" && nvm use 13.1.0'
+    prep_12: 'export NVM_DIR=$TASKCLUSTER_TASK_DIR/homebrew-tests/.nvm/ && source "$TASKCLUSTER_TASK_DIR/homebrew-tests/opt/nvm/nvm.sh" && nvm use 12.17.0'
+    prep_13: 'export NVM_DIR=$TASKCLUSTER_TASK_DIR/homebrew-tests/.nvm/ && source "$TASKCLUSTER_TASK_DIR/homebrew-tests/opt/nvm/nvm.sh" && nvm use 13.14.0'
+    prep_14: 'export NVM_DIR=$TASKCLUSTER_TASK_DIR/homebrew-tests/.nvm/ && source "$TASKCLUSTER_TASK_DIR/homebrew-tests/opt/nvm/nvm.sh" && nvm use 14.3.0'
  win:
-    prep_10: '/usr/bin/wget.exe https://nodejs.org/dist/v10.18.1/node-v10.18.1-win-x64.zip && ""C:\Program Files\7-zip\7z.exe"" x -o$TASKCLUSTER_NODE_DIR -tzip -aoa node-v10.18.1-win-x64.zip && rm node-*.zip && export PATH=$TASKCLUSTER_TASK_DIR/bin/node-v10.18.1-win-x64/:$PATH'
+    prep_10: '/usr/bin/wget.exe https://nodejs.org/dist/v10.20.1/node-v10.20.1-win-x64.zip && ""C:\Program Files\7-zip\7z.exe"" x -o$TASKCLUSTER_NODE_DIR -tzip -aoa node-v10.20.1-win-x64.zip && rm node-*.zip && export PATH=$TASKCLUSTER_TASK_DIR/bin/node-v10.20.1-win-x64/:$PATH'
    prep_11: '/usr/bin/wget.exe https://nodejs.org/dist/v11.15.0/node-v11.15.0-win-x64.zip && ""C:\Program Files\7-zip\7z.exe"" x -o$TASKCLUSTER_NODE_DIR -tzip -aoa node-v11.15.0-win-x64.zip && rm node-*.zip && export PATH=$TASKCLUSTER_TASK_DIR/bin/node-v11.15.0-win-x64/:$PATH'
-    prep_12: '/usr/bin/wget.exe https://nodejs.org/dist/v12.14.1/node-v12.14.1-win-x64.zip && ""C:\Program Files\7-zip\7z.exe"" x -o$TASKCLUSTER_NODE_DIR -tzip -aoa node-v12.14.1-win-x64.zip && rm node-*.zip && export PATH=$TASKCLUSTER_TASK_DIR/bin/node-v12.14.1-win-x64/:$PATH'
-    prep_13: '/usr/bin/wget.exe https://nodejs.org/dist/v13.6.0/node-v13.6.0-win-x64.zip && ""C:\Program Files\7-zip\7z.exe"" x -o$TASKCLUSTER_NODE_DIR -tzip -aoa node-v13.6.0-win-x64.zip && rm node-*.zip && export PATH=$TASKCLUSTER_TASK_DIR/bin/node-v13.6.0-win-x64/:$PATH'
+    prep_12: '/usr/bin/wget.exe https://nodejs.org/dist/v12.17.0/node-v12.17.0-win-x64.zip && ""C:\Program Files\7-zip\7z.exe"" x -o$TASKCLUSTER_NODE_DIR -tzip -aoa node-v12.17.0-win-x64.zip && rm node-*.zip && export PATH=$TASKCLUSTER_TASK_DIR/bin/node-v12.17.0-win-x64/:$PATH'
+    prep_13: '/usr/bin/wget.exe https://nodejs.org/dist/v13.14.0/node-v13.14.0-win-x64.zip && ""C:\Program Files\7-zip\7z.exe"" x -o$TASKCLUSTER_NODE_DIR -tzip -aoa node-v13.14.0-win-x64.zip && rm node-*.zip && export PATH=$TASKCLUSTER_TASK_DIR/bin/node-v13.14.0-win-x64/:$PATH'
+    prep_14: '/usr/bin/wget.exe https://nodejs.org/dist/v14.3.0/node-v14.3.0-win-x64.zip && ""C:\Program Files\7-zip\7z.exe"" x -o$TASKCLUSTER_NODE_DIR -tzip -aoa node-v14.3.0-win-x64.zip && rm node-*.zip && export PATH=$TASKCLUSTER_TASK_DIR/bin/node-v14.3.0-win-x64/:$PATH'
 system:
  node_gyp_cache:
-    url: 'https://community-tc.services.mozilla.com/api/index/v1/task/project.deepspeech.node-gyp-cache.2/artifacts/public/node-gyp-cache.tar.gz'
-    namespace: 'project.deepspeech.node-gyp-cache.2'
+    url: 'https://community-tc.services.mozilla.com/api/index/v1/task/project.deepspeech.node-gyp-cache.4/artifacts/public/node-gyp-cache.tar.gz'
+    namespace: 'project.deepspeech.node-gyp-cache.4'
  homebrew_builds:
-    url: 'https://community-tc.services.mozilla.com/api/index/v1/task/project.deepspeech.homebrew_builds.4/artifacts/public/homebrew_builds.tar.gz'
-    namespace: 'project.deepspeech.homebrew_builds.4'
+    url: 'https://community-tc.services.mozilla.com/api/index/v1/task/project.deepspeech.homebrew_builds.5/artifacts/public/homebrew_builds.tar.gz'
+    namespace: 'project.deepspeech.homebrew_builds.5'
  homebrew_tests:
-    url: 'https://community-tc.services.mozilla.com/api/index/v1/task/project.deepspeech.homebrew_tests.4/artifacts/public/homebrew_tests.tar.gz'
-    namespace: 'project.deepspeech.homebrew_tests.4'
+    url: 'https://community-tc.services.mozilla.com/api/index/v1/task/project.deepspeech.homebrew_tests.6/artifacts/public/homebrew_tests.tar.gz'
+    namespace: 'project.deepspeech.homebrew_tests.6'
  android_cache:
    arm64_v8a:
      android_24:
--- a/taskcluster/homebrew-build.sh
+++ b/taskcluster/homebrew-build.sh
@ -29,7 +29,7 @@ do_prepare_homebrew()
  export PATH=${_brew_instance}/bin:$PATH
  export HOMEBREW_LOGS="${_brew_instance}/homebrew.logs/"
  export HOMEBREW_CACHE="${_brew_instance}/homebrew.cache/"
-  export BREW_FORMULAS_COMMIT=c3f06e4f17853bea8c35742923a9c43d3a244d35
+  export BREW_FORMULAS_COMMIT=ddd39cf1b71452bfe9c5f17f45cc0118796b20d3

  # Never fail on pre-existing homebrew/ directory
  mkdir -p "${_brew_instance}" || true
@ -40,7 +40,7 @@ do_prepare_homebrew()
    curl -L ${BREW_URL} | tar xz --strip 1 -C "${_brew_instance}"
  fi;

-  check_homebrew
+  check_homebrew "${_brew_instance}"

  # Force an upgrade to fetch formulae
  brew search openssl
@ -53,14 +53,16 @@ do_prepare_homebrew()

 check_homebrew()
 {
-  echo "local brew prefix ..."
-  local_prefix=$(brew --prefix)
-  echo "${local_prefix}"
+  local _expected_prefix=$1

-  if [ "${BUILDS_BREW}" != "${local_prefix}" ]; then
+  echo "local brew prefix ..."
+  local _local_prefix=$(brew --prefix)
+  echo "${_local_prefix}"
+
+  if [ "${_expected_prefix}" != "${_local_prefix}" ]; then
    echo "Weird state:"
-    echo "BUILDS_BREW=${BUILDS_BREW}"
-    echo "local_prefix=${local_prefix}"
+    echo "_expected_prefix=${_expected_prefix}"
+    echo "_local_prefix=${_local_prefix}"
    exit 1
  fi;
 }
@ -90,7 +92,7 @@ prepare_homebrew_tests()

  install_pkg_homebrew "nvm"
    source "${TESTS_BREW}/opt/nvm/nvm.sh"
-    for node_ver in ${SUPPORTED_NODEJS_VERSIONS};
+    for node_ver in ${SUPPORTED_NODEJS_TESTS_VERSIONS};
    do
      nvm install ${node_ver}
    done;
--- a/taskcluster/homebrew_builds-darwin-amd64.yml
+++ b/taskcluster/homebrew_builds-darwin-amd64.yml
@ -1,8 +1,8 @@
 build:
  template_file: homebrew-darwin-opt-base.tyml
  homebrew:
-    url: 'https://community-tc.services.mozilla.com/api/index/v1/task/project.deepspeech.homebrew_builds.4/artifacts/public/homebrew_builds.tar.gz'
-    namespace: 'project.deepspeech.homebrew_builds.4'
+    url: 'https://community-tc.services.mozilla.com/api/index/v1/task/project.deepspeech.homebrew_builds.5/artifacts/public/homebrew_builds.tar.gz'
+    namespace: 'project.deepspeech.homebrew_builds.5'
  scripts:
    build: "taskcluster/homebrew-build.sh --builds"
    package: "taskcluster/homebrew-package.sh --builds"
--- a/taskcluster/homebrew_tests-darwin-amd64.yml
+++ b/taskcluster/homebrew_tests-darwin-amd64.yml
@ -1,8 +1,8 @@
 build:
  template_file: homebrew-darwin-opt-base.tyml
  homebrew:
-    url: 'https://community-tc.services.mozilla.com/api/index/v1/task/project.deepspeech.homebrew_tests.4/artifacts/public/homebrew_tests.tar.gz'
-    namespace: 'project.deepspeech.homebrew_tests.4'
+    url: 'https://community-tc.services.mozilla.com/api/index/v1/task/project.deepspeech.homebrew_tests.6/artifacts/public/homebrew_tests.tar.gz'
+    namespace: 'project.deepspeech.homebrew_tests.6'
  scripts:
    build: "taskcluster/homebrew-build.sh --tests"
    package: "taskcluster/homebrew-package.sh --tests"
--- a/taskcluster/node-gyp-populate.sh
+++ b/taskcluster/node-gyp-populate.sh
@ -16,7 +16,7 @@ mkdir -p ${devDir}

 node-gyp list ${devDir}

-for node in ${SUPPORTED_NODEJS_VERSIONS}; do
+for node in ${SUPPORTED_NODEJS_BUILD_VERSIONS}; do
    node-gyp install --devdir ${devDir} \
        --target=$node
    mkdir ${devDir}/${node}/x64/ || true
--- a/taskcluster/tc-all-vars.sh
+++ b/taskcluster/tc-all-vars.sh
@ -25,7 +25,7 @@ if [ "${OS}" = "Darwin" ]; then
    export PYENV_ROOT="${DS_ROOT_TASK}/pyenv-root"

    export HOMEBREW_NO_AUTO_UPDATE=1
-    export BREW_URL=https://github.com/Homebrew/brew/tarball/2.1.14
+    export BREW_URL=https://github.com/Homebrew/brew/tarball/2.2.17

    export BUILDS_BREW="${TASKCLUSTER_TASK_DIR}/homebrew-builds"
    export TESTS_BREW="${TASKCLUSTER_TASK_DIR}/homebrew-tests"
@ -87,5 +87,10 @@ SUPPORTED_PYTHON_VERSIONS=${SUPPORTED_PYTHON_VERSIONS:-3.5.8:ucs2 3.6.10:ucs2 3.
 # When updating NodeJS / ElectronJS supported versions, do not forget to increment
 # deepspeech.node-gyp-cache.<X> in both `system.node_gyp_cache` (taskcluster/.shared.yml)
 # and route index (taskcluster/node-gyp-cache.yml) to ensure the cache is updated
-SUPPORTED_NODEJS_VERSIONS=${SUPPORTED_NODEJS_VERSIONS:-10.18.1 11.15.0 12.8.1 13.1.0}
-SUPPORTED_ELECTRONJS_VERSIONS=${SUPPORTED_ELECTRONJS_VERSIONS:-5.0.13 6.0.12 6.1.7 7.0.1 7.1.8 8.0.1}
+#
+# Also, builds should always target first major branch release to ensure proper binary compatibility
+# and tests should always target latest major branch release version
+SUPPORTED_NODEJS_BUILD_VERSIONS=${SUPPORTED_NODEJS_BUILD_VERSIONS:-10.0.0 11.0.0 12.7.0 13.0.0 14.0.0}
+SUPPORTED_NODEJS_TESTS_VERSIONS=${SUPPORTED_NODEJS_TESTS_VERSIONS:-10.20.1 11.15.0 12.17.0 13.14.0 14.3.0}
+
+SUPPORTED_ELECTRONJS_VERSIONS=${SUPPORTED_ELECTRONJS_VERSIONS:-5.0.13 6.0.12 6.1.7 7.0.1 7.1.8 8.0.1 9.0.1}
--- a/taskcluster/tc-build-utils.sh
+++ b/taskcluster/tc-build-utils.sh
@ -110,7 +110,7 @@ do_deepspeech_nodejs_build()

  export PATH="${PYTHON27}:$PATH"

-  for node in ${SUPPORTED_NODEJS_VERSIONS}; do
+  for node in ${SUPPORTED_NODEJS_BUILD_VERSIONS}; do
    EXTRA_CFLAGS="${EXTRA_LOCAL_CFLAGS}" EXTRA_LDFLAGS="${EXTRA_LOCAL_LDFLAGS}" EXTRA_LIBS="${EXTRA_LOCAL_LIBS}" make -C native_client/javascript \
      TARGET=${SYSTEM_TARGET} \
      RASPBIAN=${SYSTEM_RASPBIAN} \
--- a/taskcluster/tc-electron_tflite-tests.sh
+++ b/taskcluster/tc-electron_tflite-tests.sh
@ -0,0 +1,71 @@
+#!/bin/bash
+
+set -xe
+
+source $(dirname "$0")/tc-tests-utils.sh
+
+nodever=$1
+electronver=$2
+
+if [ -z "${nodever}" ]; then
+    echo "No node version given, aborting."
+    exit 1
+fi;
+
+if [ -z "${electronver}" ]; then
+    echo "No electron version given, aborting."
+    exit 1
+fi;
+
+bitrate=$3
+set_ldc_sample_filename "${bitrate}"
+
+model_source=${DEEPSPEECH_TEST_MODEL//.pb/.tflite}
+model_name=$(basename "${model_source}")
+model_name_mmap=$(basename "${model_source}")
+
+download_data
+
+node --version
+npm --version
+
+NODE_ROOT="${DS_ROOT_TASK}/ds-test/"
+NODE_CACHE="${DS_ROOT_TASK}/ds-test.cache/"
+export NODE_PATH="${NODE_ROOT}/node_modules/"
+export PATH="${NODE_ROOT}:${NODE_PATH}/.bin/:${NODE_PATH}/electron/dist/:$PATH"
+
+npm install --prefix ${NODE_ROOT} --cache ${NODE_CACHE} electron@${electronver}
+
+deepspeech_npm_url=$(get_dep_npm_pkg_url)
+npm install --prefix ${NODE_ROOT} --cache ${NODE_CACHE} ${deepspeech_npm_url}
+
+if [ "${OS}" = "Darwin" ]; then
+  ln -s Electron.app/Contents/MacOS/Electron "${NODE_ROOT}/node_modules/electron/dist/node"
+else
+  ln -s electron "${NODE_ROOT}/node_modules/electron/dist/node"
+  if [ -f "${NODE_ROOT}/node_modules/electron/dist//chrome-sandbox" ]; then
+    export ELECTRON_DISABLE_SANDBOX=1
+  fi;
+fi
+
+find ${NODE_ROOT}/node_modules/electron/dist/
+
+which electron
+which node
+
+if [ "${OS}" = "Linux" ]; then
+  export DISPLAY=':99.0'
+  Xvfb :99 -screen 0 1024x768x24 > /dev/null 2>&1 &
+  xvfb_process=$!
+fi
+
+node --version
+
+check_runtime_electronjs
+
+run_electronjs_inference_tests
+
+if [ "${OS}" = "Linux" ]; then
+  sleep 1
+  kill -9 ${xvfb_process} || true
+fi
--- a/taskcluster/tc-train-unittests.sh
+++ b/taskcluster/tc-train-unittests.sh
@ -0,0 +1,19 @@
+#!/bin/bash
+
+set -xe
+
+source $(dirname "$0")/tc-tests-utils.sh
+
+extract_python_versions "$1" "pyver" "pyver_pkg" "py_unicode_type" "pyconf" "pyalias"
+
+mkdir -p ${TASKCLUSTER_ARTIFACTS} || true
+
+virtualenv_activate "${pyalias}" "deepspeech"
+
+set -o pipefail
+pip install --upgrade pip==19.3.1 setuptools==45.0.0 wheel==0.33.6 | cat
+pushd ${HOME}/DeepSpeech/ds
+    pip install --upgrade . | cat
+    python -m unittest
+popd
+set +o pipefail
--- a/taskcluster/test-electronjs_v8.0_multiarchpkg-win-tflite-opt.yml.disabled
+++ b/taskcluster/test-electronjs_v8.0_multiarchpkg-win-tflite-opt.yml.disabled
@ -8,7 +8,7 @@ build:
    >
      ${system.sox_win} && ${nodejs.win.prep_12}
  args:
-    tests_cmdline: "${system.homedir.win}/DeepSpeech/ds/taskcluster/tc-electron-tests.sh 12.x 8.0.1 16k"
+    tests_cmdline: "${system.homedir.win}/DeepSpeech/ds/taskcluster/tc-electron_tflite-tests.sh 12.x 8.0.1 16k"
  metadata:
    name: "DeepSpeech Windows AMD64 TFLite ElectronJS MultiArch Package v8.0 tests"
    description: "Testing DeepSpeech for Windows/AMD64 on ElectronJS MultiArch Package v8.0, TFLite only, optimized version"
--- a/taskcluster/test-electronjs_v9.0-darwin-amd64-opt.yml
+++ b/taskcluster/test-electronjs_v9.0-darwin-amd64-opt.yml
@ -0,0 +1,15 @@
+build:
+  template_file: test-darwin-opt-base.tyml
+  dependencies:
+    - "darwin-amd64-cpu-opt"
+    - "test-training_16k-linux-amd64-py36m-opt"
+    - "homebrew_tests-darwin-amd64"
+  test_model_task: "test-training_16k-linux-amd64-py36m-opt"
+  system_setup:
+    >
+      ${nodejs.brew.prep_12}
+  args:
+    tests_cmdline: "$TASKCLUSTER_TASK_DIR/DeepSpeech/ds/taskcluster/tc-electron-tests.sh 12.x 9.0.1 16k"
+  metadata:
+    name: "DeepSpeech OSX AMD64 CPU ElectronJS v9.0 tests"
+    description: "Testing DeepSpeech for OSX/AMD64 on ElectronJS v9.0, CPU only, optimized version"
--- a/taskcluster/test-electronjs_v9.0-win-amd64-opt.yml
+++ b/taskcluster/test-electronjs_v9.0-win-amd64-opt.yml
@ -0,0 +1,14 @@
+build:
+  template_file: test-win-opt-base.tyml
+  dependencies:
+    - "win-amd64-cpu-opt"
+    - "test-training_16k-linux-amd64-py36m-opt"
+  test_model_task: "test-training_16k-linux-amd64-py36m-opt"
+  system_setup:
+    >
+      ${system.sox_win} && ${nodejs.win.prep_12}
+  args:
+    tests_cmdline: "${system.homedir.win}/DeepSpeech/ds/taskcluster/tc-electron-tests.sh 12.x 9.0.1 16k"
+  metadata:
+    name: "DeepSpeech Windows AMD64 CPU ElectronJS v9.0 tests"
+    description: "Testing DeepSpeech for Windows/AMD64 on ElectronJS v9.0, CPU only, optimized version"
--- a/taskcluster/test-electronjs_v9.0_16k-linux-amd64-opt.yml
+++ b/taskcluster/test-electronjs_v9.0_16k-linux-amd64-opt.yml
@ -0,0 +1,15 @@
+build:
+  template_file: test-linux-opt-base.tyml
+  docker_image: "ubuntu:16.04"
+  dependencies:
+    - "linux-amd64-cpu-opt"
+    - "test-training_16k-linux-amd64-py36m-opt"
+  test_model_task: "test-training_16k-linux-amd64-py36m-opt"
+  system_setup:
+    >
+      ${nodejs.packages_xenial.prep_12} && ${nodejs.packages_xenial.apt_pinning} && apt-get -qq update && apt-get -qq -y install ${nodejs.packages_xenial.apt} ${electronjs.packages_xenial.apt}
+  args:
+    tests_cmdline: "${system.homedir.linux}/DeepSpeech/ds/taskcluster/tc-electron-tests.sh 12.x 9.0.1 16k"
+  metadata:
+    name: "DeepSpeech Linux AMD64 CPU ElectronJS v9.0 tests (16kHz)"
+    description: "Testing DeepSpeech for Linux/AMD64 on ElectronJS v9.0, CPU only, optimized version (16kHz)"
--- a/taskcluster/test-electronjs_v9.0_8k-linux-amd64-opt.yml
+++ b/taskcluster/test-electronjs_v9.0_8k-linux-amd64-opt.yml
@ -0,0 +1,15 @@
+build:
+  template_file: test-linux-opt-base.tyml
+  docker_image: "ubuntu:16.04"
+  dependencies:
+    - "linux-amd64-cpu-opt"
+    - "test-training_8k-linux-amd64-py36m-opt"
+  test_model_task: "test-training_8k-linux-amd64-py36m-opt"
+  system_setup:
+    >
+      ${nodejs.packages_xenial.prep_12} && ${nodejs.packages_xenial.apt_pinning} && apt-get -qq update && apt-get -qq -y install ${nodejs.packages_xenial.apt} ${electronjs.packages_xenial.apt}
+  args:
+    tests_cmdline: "${system.homedir.linux}/DeepSpeech/ds/taskcluster/tc-electron-tests.sh 12.x 9.0.1 8k"
+  metadata:
+    name: "DeepSpeech Linux AMD64 CPU ElectronJS v9.0 tests (8kHz)"
+    description: "Testing DeepSpeech for Linux/AMD64 on ElectronJS v9.0, CPU only, optimized version (8kHz)"
--- a/taskcluster/test-electronjs_v9.0_multiarchpkg-win-amd64-opt.yml
+++ b/taskcluster/test-electronjs_v9.0_multiarchpkg-win-amd64-opt.yml
@ -0,0 +1,14 @@
+build:
+  template_file: test-win-opt-base.tyml
+  dependencies:
+    - "node-package-cpu"
+    - "test-training_16k-linux-amd64-py36m-opt"
+  test_model_task: "test-training_16k-linux-amd64-py36m-opt"
+  system_setup:
+    >
+      ${system.sox_win} && ${nodejs.win.prep_12}
+  args:
+    tests_cmdline: "${system.homedir.win}/DeepSpeech/ds/taskcluster/tc-electron-tests.sh 12.x 9.0.1 16k"
+  metadata:
+    name: "DeepSpeech Windows AMD64 CPU ElectronJS MultiArch Package v9.0 tests"
+    description: "Testing DeepSpeech for Windows/AMD64 on ElectronJS MultiArch Package v9.0, CPU only, optimized version"
--- a/taskcluster/test-electronjs_v9.0_multiarchpkg-win-cuda-opt.yml
+++ b/taskcluster/test-electronjs_v9.0_multiarchpkg-win-cuda-opt.yml
@ -0,0 +1,14 @@
+build:
+  template_file: test-win-cuda-opt-base.tyml
+  dependencies:
+    - "node-package-gpu"
+    - "test-training_16k-linux-amd64-py36m-opt"
+  test_model_task: "test-training_16k-linux-amd64-py36m-opt"
+  system_setup:
+    >
+      ${system.sox_win} && ${nodejs.win.prep_12}
+  args:
+    tests_cmdline: "${system.homedir.win}/DeepSpeech/ds/taskcluster/tc-electron-tests.sh 12.x 9.0.1 16k cuda"
+  metadata:
+    name: "DeepSpeech Windows AMD64 CUDA ElectronJS MultiArch Package v9.0 tests"
+    description: "Testing DeepSpeech for Windows/AMD64 on ElectronJS MultiArch Package v9.0, CUDA, optimized version"
--- a/taskcluster/test-electronjs_v9.0_multiarchpkg-win-tflite-opt.yml
+++ b/taskcluster/test-electronjs_v9.0_multiarchpkg-win-tflite-opt.yml
@ -0,0 +1,14 @@
+build:
+  template_file: test-win-opt-base.tyml
+  dependencies:
+    - "node-package-tflite"
+    - "test-training_16k-linux-amd64-py36m-opt"
+  test_model_task: "test-training_16k-linux-amd64-py36m-opt"
+  system_setup:
+    >
+      ${system.sox_win} && ${nodejs.win.prep_12}
+  args:
+    tests_cmdline: "${system.homedir.win}/DeepSpeech/ds/taskcluster/tc-electron_tflite-tests.sh 12.x 9.0.1 16k"
+  metadata:
+    name: "DeepSpeech Windows AMD64 TFLite ElectronJS MultiArch Package v9.0 tests"
+    description: "Testing DeepSpeech for Windows/AMD64 on ElectronJS MultiArch Package v9.0, TFLite only, optimized version"
--- a/taskcluster/test-nodejs_10x-armbian-arm64-opt.yml
+++ b/taskcluster/test-nodejs_10x-armbian-arm64-opt.yml
@ -11,4 +11,4 @@ build:
    tests_cmdline: "${system.homedir.linux}/DeepSpeech/ds/taskcluster/tc-node_tflite-tests.sh 10.x 16k"
  metadata:
    name: "DeepSpeech ARMbian ARM64 Cortex-A53 CPU NodeJS 10.x tests"
-    description: "Testing DeepSpeech forARMbian ARM64 Cortex-A53 on NodeJS v10.x, CPU only, optimized version"
+    description: "Testing DeepSpeech for ARMbian ARM64 Cortex-A53 on NodeJS v10.x, CPU only, optimized version"
--- a/taskcluster/test-nodejs_11x-armbian-arm64-opt.yml
+++ b/taskcluster/test-nodejs_11x-armbian-arm64-opt.yml
@ -11,4 +11,4 @@ build:
    tests_cmdline: "${system.homedir.linux}/DeepSpeech/ds/taskcluster/tc-node_tflite-tests.sh 11.x 16k"
  metadata:
    name: "DeepSpeech ARMbian ARM64 Cortex-A53 CPU NodeJS 11.x tests"
-    description: "Testing DeepSpeech forARMbian ARM64 Cortex-A53 on NodeJS v11.x, CPU only, optimized version"
+    description: "Testing DeepSpeech for ARMbian ARM64 Cortex-A53 on NodeJS v11.x, CPU only, optimized version"
--- a/taskcluster/test-nodejs_12x-armbian-arm64-opt.yml
+++ b/taskcluster/test-nodejs_12x-armbian-arm64-opt.yml
@ -11,4 +11,4 @@ build:
    tests_cmdline: "${system.homedir.linux}/DeepSpeech/ds/taskcluster/tc-node_tflite-tests.sh 12.x 16k"
  metadata:
    name: "DeepSpeech ARMbian ARM64 Cortex-A53 CPU NodeJS 12.x tests"
-    description: "Testing DeepSpeech forARMbian ARM64 Cortex-A53 on NodeJS v12.x, CPU only, optimized version"
+    description: "Testing DeepSpeech for ARMbian ARM64 Cortex-A53 on NodeJS v12.x, CPU only, optimized version"
--- a/taskcluster/test-nodejs_13x-armbian-arm64-opt.yml
+++ b/taskcluster/test-nodejs_13x-armbian-arm64-opt.yml
@ -11,4 +11,4 @@ build:
    tests_cmdline: "${system.homedir.linux}/DeepSpeech/ds/taskcluster/tc-node_tflite-tests.sh 13.x 16k"
  metadata:
    name: "DeepSpeech ARMbian ARM64 Cortex-A53 CPU NodeJS 13.x tests"
-    description: "Testing DeepSpeech forARMbian ARM64 Cortex-A53 on NodeJS v13.x, CPU only, optimized version"
+    description: "Testing DeepSpeech for ARMbian ARM64 Cortex-A53 on NodeJS v13.x, CPU only, optimized version"
--- a/taskcluster/test-nodejs_13x_multiarchpkg-armbian-arm64-opt.yml
+++ b/taskcluster/test-nodejs_13x_multiarchpkg-armbian-arm64-opt.yml
@ -11,4 +11,4 @@ build:
    tests_cmdline: "${system.homedir.linux}/DeepSpeech/ds/taskcluster/tc-node_tflite-tests.sh 13.x 16k"
  metadata:
    name: "DeepSpeech ARMbian ARM64 Cortex-A53 CPU NodeJS MultiArch Package 13.x tests"
-    description: "Testing DeepSpeech forARMbian ARM64 Cortex-A53 on NodeJS MultiArch Package v13.x, CPU only, optimized version"
+    description: "Testing DeepSpeech for ARMbian ARM64 Cortex-A53 on NodeJS MultiArch Package v13.x, CPU only, optimized version"
--- a/taskcluster/test-nodejs_14x-armbian-arm64-opt.yml
+++ b/taskcluster/test-nodejs_14x-armbian-arm64-opt.yml
@ -0,0 +1,14 @@
+build:
+  template_file: test-armbian-opt-base.tyml
+  dependencies:
+    - "linux-arm64-cpu-opt"
+    - "test-training_16k-linux-amd64-py36m-opt"
+  test_model_task: "test-training_16k-linux-amd64-py36m-opt"
+  system_setup:
+    >
+      ${nodejs.packages_buster.prep_14} && ${nodejs.packages_buster.apt_pinning} && apt-get -qq update && apt-get -qq -y install ${nodejs.packages_buster.apt}
+  args:
+    tests_cmdline: "${system.homedir.linux}/DeepSpeech/ds/taskcluster/tc-node_tflite-tests.sh 14.x 16k"
+  metadata:
+    name: "DeepSpeech ARMbian ARM64 Cortex-A53 CPU NodeJS 14.x tests"
+    description: "Testing DeepSpeech for ARMbian ARM64 Cortex-A53 on NodeJS v14.x, CPU only, optimized version"
--- a/taskcluster/test-nodejs_14x-darwin-amd64-opt.yml
+++ b/taskcluster/test-nodejs_14x-darwin-amd64-opt.yml
@ -0,0 +1,15 @@
+build:
+  template_file: test-darwin-opt-base.tyml
+  dependencies:
+    - "darwin-amd64-cpu-opt"
+    - "test-training_16k-linux-amd64-py36m-opt"
+    - "homebrew_tests-darwin-amd64"
+  test_model_task: "test-training_16k-linux-amd64-py36m-opt"
+  system_setup:
+    >
+      ${nodejs.brew.prep_14}
+  args:
+    tests_cmdline: "$TASKCLUSTER_TASK_DIR/DeepSpeech/ds/taskcluster/tc-node-tests.sh 14.x 16k"
+  metadata:
+    name: "DeepSpeech OSX AMD64 CPU NodeJS 14.x tests"
+    description: "Testing DeepSpeech for OSX/AMD64 on NodeJS v14.x, CPU only, optimized version"
--- a/taskcluster/test-nodejs_14x-raspbian-rpi3-opt.yml
+++ b/taskcluster/test-nodejs_14x-raspbian-rpi3-opt.yml
@ -0,0 +1,14 @@
+build:
+  template_file: test-raspbian-opt-base.tyml
+  dependencies:
+    - "linux-rpi3-cpu-opt"
+    - "test-training_16k-linux-amd64-py36m-opt"
+  test_model_task: "test-training_16k-linux-amd64-py36m-opt"
+  system_setup:
+    >
+      ${nodejs.packages_buster.prep_14} && ${nodejs.packages_buster.apt_pinning} && apt-get -qq update && apt-get -qq -y install ${nodejs.packages_buster.apt}
+  args:
+    tests_cmdline: "${system.homedir.linux}/DeepSpeech/ds/taskcluster/tc-node_tflite-tests.sh 14.x 16k"
+  metadata:
+    name: "DeepSpeech Raspbian RPi3/ARMv7 CPU NodeJS 14.x tests"
+    description: "Testing DeepSpeech for Raspbian RPi3/ARMv7 on NodeJS v14.x, CPU only, optimized version"
--- a/taskcluster/test-nodejs_14x-win-amd64-opt.yml
+++ b/taskcluster/test-nodejs_14x-win-amd64-opt.yml
@ -0,0 +1,14 @@
+build:
+  template_file: test-win-opt-base.tyml
+  dependencies:
+    - "win-amd64-cpu-opt"
+    - "test-training_16k-linux-amd64-py36m-opt"
+  test_model_task: "test-training_16k-linux-amd64-py36m-opt"
+  system_setup:
+    >
+      ${system.sox_win} && ${nodejs.win.prep_14}
+  args:
+    tests_cmdline: "${system.homedir.win}/DeepSpeech/ds/taskcluster/tc-node-tests.sh 14.x 16k"
+  metadata:
+    name: "DeepSpeech Windows AMD64 CPU NodeJS 14.x tests"
+    description: "Testing DeepSpeech for Windows/AMD64 on NodeJS v14.x, CPU only, optimized version"
--- a/taskcluster/test-nodejs_14x_16k-linux-amd64-opt.yml
+++ b/taskcluster/test-nodejs_14x_16k-linux-amd64-opt.yml
@ -0,0 +1,15 @@
+build:
+  template_file: test-linux-opt-base.tyml
+  docker_image: "ubuntu:16.04"
+  dependencies:
+    - "linux-amd64-cpu-opt"
+    - "test-training_16k-linux-amd64-py36m-opt"
+  test_model_task: "test-training_16k-linux-amd64-py36m-opt"
+  system_setup:
+    >
+      ${nodejs.packages_xenial.prep_14} && ${nodejs.packages_xenial.apt_pinning} && apt-get -qq update && apt-get -qq -y install ${nodejs.packages_xenial.apt}
+  args:
+    tests_cmdline: "${system.homedir.linux}/DeepSpeech/ds/taskcluster/tc-node-tests.sh 14.x 16k"
+  metadata:
+    name: "DeepSpeech Linux AMD64 CPU NodeJS 14.x tests (16kHz)"
+    description: "Testing DeepSpeech for Linux/AMD64 on NodeJS v14.x, CPU only, optimized version (16kHz)"
--- a/taskcluster/test-nodejs_14x_16k-linux-amd64-prod_pbmodel-opt.yml
+++ b/taskcluster/test-nodejs_14x_16k-linux-amd64-prod_pbmodel-opt.yml
@ -0,0 +1,13 @@
+build:
+  template_file: test-linux-opt-base.tyml
+  docker_image: "ubuntu:16.04"
+  dependencies:
+    - "linux-amd64-cpu-opt"
+  system_setup:
+    >
+      ${nodejs.packages_xenial.prep_14} && ${nodejs.packages_xenial.apt_pinning} && apt-get -qq update && apt-get -qq -y install ${nodejs.packages_xenial.apt}
+  args:
+    tests_cmdline: "${system.homedir.linux}/DeepSpeech/ds/taskcluster/tc-node-tests-prod.sh 14.x 16k"
+  metadata:
+    name: "DeepSpeech Linux AMD64 CPU NodeJS 14.x prod tests (16kHz)"
+    description: "Testing DeepSpeech for Linux/AMD64 on NodeJS v14.x on prod model, CPU only, optimized version (16kHz)"
--- a/taskcluster/test-nodejs_14x_16k_multiarchpkg-linux-amd64-opt.yml
+++ b/taskcluster/test-nodejs_14x_16k_multiarchpkg-linux-amd64-opt.yml
@ -0,0 +1,15 @@
+build:
+  template_file: test-linux-opt-base.tyml
+  docker_image: "ubuntu:16.04"
+  dependencies:
+    - "node-package-cpu"
+    - "test-training_16k-linux-amd64-py36m-opt"
+  test_model_task: "test-training_16k-linux-amd64-py36m-opt"
+  system_setup:
+    >
+      ${nodejs.packages_xenial.prep_14} && ${nodejs.packages_xenial.apt_pinning} && apt-get -qq update && apt-get -qq -y install ${nodejs.packages_xenial.apt}
+  args:
+    tests_cmdline: "${system.homedir.linux}/DeepSpeech/ds/taskcluster/tc-node-tests.sh 14.x 16k"
+  metadata:
+    name: "DeepSpeech Linux AMD64 CPU NodeJS MultiArch Package 14.x tests (16kHz)"
+    description: "Testing DeepSpeech for Linux/AMD64 on NodeJS MultiArch Package v14.x, CPU only, optimized version (16kHz)"
--- a/taskcluster/test-nodejs_14x_16k_multiarchpkg-linux-amd64-prod_pbmodel-opt.yml
+++ b/taskcluster/test-nodejs_14x_16k_multiarchpkg-linux-amd64-prod_pbmodel-opt.yml
@ -0,0 +1,13 @@
+build:
+  template_file: test-linux-opt-base.tyml
+  docker_image: "ubuntu:16.04"
+  dependencies:
+    - "node-package-cpu"
+  system_setup:
+    >
+      ${nodejs.packages_xenial.prep_14} && ${nodejs.packages_xenial.apt_pinning} && apt-get -qq update && apt-get -qq -y install ${nodejs.packages_xenial.apt}
+  args:
+    tests_cmdline: "${system.homedir.linux}/DeepSpeech/ds/taskcluster/tc-node-tests-prod.sh 14.x 16k"
+  metadata:
+    name: "DeepSpeech Linux AMD64 CPU NodeJS MultiArch Package 14.x prod tests (16kHz)"
+    description: "Testing DeepSpeech for Linux/AMD64 on NodeJS MultiArch Package v14.x on prod model, CPU only, optimized version (16kHz)"
--- a/taskcluster/test-nodejs_14x_16k_multiarchpkg-linux-tflite-opt.yml
+++ b/taskcluster/test-nodejs_14x_16k_multiarchpkg-linux-tflite-opt.yml
@ -0,0 +1,15 @@
+build:
+  template_file: test-linux-opt-base.tyml
+  docker_image: "ubuntu:16.04"
+  dependencies:
+    - "node-package-tflite"
+    - "test-training_16k-linux-amd64-py36m-opt"
+  test_model_task: "test-training_16k-linux-amd64-py36m-opt"
+  system_setup:
+    >
+      ${nodejs.packages_xenial.prep_14} && ${nodejs.packages_xenial.apt_pinning} && apt-get -qq update && apt-get -qq -y install ${nodejs.packages_xenial.apt}
+  args:
+    tests_cmdline: "${system.homedir.linux}/DeepSpeech/ds/taskcluster/tc-node_tflite-tests.sh 14.x 16k"
+  metadata:
+    name: "DeepSpeech Linux AMD64 TFLite NodeJS MultiArch Package 14.x tests (16kHz)"
+    description: "Testing DeepSpeech for Linux/AMD64 on NodeJS MultiArch Package v14.x, TFLite only, optimized version (16kHz)"
--- a/taskcluster/test-nodejs_14x_16k_tflite-linux-amd64-prod-opt.yml
+++ b/taskcluster/test-nodejs_14x_16k_tflite-linux-amd64-prod-opt.yml
@ -0,0 +1,13 @@
+build:
+  template_file: test-linux-opt-base.tyml
+  docker_image: "ubuntu:16.04"
+  dependencies:
+    - "linux-amd64-tflite-opt"
+  system_setup:
+    >
+      ${nodejs.packages_xenial.prep_14} && ${nodejs.packages_xenial.apt_pinning} && apt-get -qq update && apt-get -qq -y install ${nodejs.packages_xenial.apt}
+  args:
+    tests_cmdline: "${system.homedir.linux}/DeepSpeech/ds/taskcluster/tc-node_tflite-tests-prod.sh 14.x 16k"
+  metadata:
+    name: "DeepSpeech Linux AMD64 TFLite NodeJS 14.x prod tests (16kHz)"
+    description: "Testing DeepSpeech for Linux/AMD64 on NodeJS v14.x on prod model, TFLite, optimized version (16kHz)"
--- a/taskcluster/test-nodejs_14x_8k-linux-amd64-opt.yml
+++ b/taskcluster/test-nodejs_14x_8k-linux-amd64-opt.yml
@ -0,0 +1,15 @@
+build:
+  template_file: test-linux-opt-base.tyml
+  docker_image: "ubuntu:16.04"
+  dependencies:
+    - "linux-amd64-cpu-opt"
+    - "test-training_8k-linux-amd64-py36m-opt"
+  test_model_task: "test-training_8k-linux-amd64-py36m-opt"
+  system_setup:
+    >
+      ${nodejs.packages_xenial.prep_14} && ${nodejs.packages_xenial.apt_pinning} && apt-get -qq update && apt-get -qq -y install ${nodejs.packages_xenial.apt}
+  args:
+    tests_cmdline: "${system.homedir.linux}/DeepSpeech/ds/taskcluster/tc-node-tests.sh 14.x 8k"
+  metadata:
+    name: "DeepSpeech Linux AMD64 CPU NodeJS 14.x tests (8kHz)"
+    description: "Testing DeepSpeech for Linux/AMD64 on NodeJS v14.x, CPU only, optimized version (8kHz)"
--- a/taskcluster/test-nodejs_14x_8k-linux-amd64-prod_pbmodel-opt.yml
+++ b/taskcluster/test-nodejs_14x_8k-linux-amd64-prod_pbmodel-opt.yml
@ -0,0 +1,13 @@
+build:
+  template_file: test-linux-opt-base.tyml
+  docker_image: "ubuntu:16.04"
+  dependencies:
+    - "linux-amd64-cpu-opt"
+  system_setup:
+    >
+      ${nodejs.packages_xenial.prep_14} && ${nodejs.packages_xenial.apt_pinning} && apt-get -qq update && apt-get -qq -y install ${nodejs.packages_xenial.apt}
+  args:
+    tests_cmdline: "${system.homedir.linux}/DeepSpeech/ds/taskcluster/tc-node-tests-prod.sh 14.x 8k"
+  metadata:
+    name: "DeepSpeech Linux AMD64 CPU NodeJS 14.x prod tests (8kHz)"
+    description: "Testing DeepSpeech for Linux/AMD64 on NodeJS v14.x on prod model, CPU only, optimized version (8kHz)"
--- a/taskcluster/test-nodejs_14x_8k_multiarchpkg-linux-amd64-opt.yml
+++ b/taskcluster/test-nodejs_14x_8k_multiarchpkg-linux-amd64-opt.yml
@ -0,0 +1,15 @@
+build:
+  template_file: test-linux-opt-base.tyml
+  docker_image: "ubuntu:16.04"
+  dependencies:
+    - "node-package-cpu"
+    - "test-training_8k-linux-amd64-py36m-opt"
+  test_model_task: "test-training_8k-linux-amd64-py36m-opt"
+  system_setup:
+    >
+      ${nodejs.packages_xenial.prep_14} && ${nodejs.packages_xenial.apt_pinning} && apt-get -qq update && apt-get -qq -y install ${nodejs.packages_xenial.apt}
+  args:
+    tests_cmdline: "${system.homedir.linux}/DeepSpeech/ds/taskcluster/tc-node-tests.sh 14.x 8k"
+  metadata:
+    name: "DeepSpeech Linux AMD64 CPU NodeJS MultiArch Package 14.x tests (8kHz)"
+    description: "Testing DeepSpeech for Linux/AMD64 on NodeJS MultiArch Package v14.x, CPU only, optimized version (8kHz)"
--- a/taskcluster/test-nodejs_14x_8k_multiarchpkg-linux-amd64-prod_pbmodel-opt.yml
+++ b/taskcluster/test-nodejs_14x_8k_multiarchpkg-linux-amd64-prod_pbmodel-opt.yml
@ -0,0 +1,13 @@
+build:
+  template_file: test-linux-opt-base.tyml
+  docker_image: "ubuntu:16.04"
+  dependencies:
+    - "node-package-cpu"
+  system_setup:
+    >
+      ${nodejs.packages_xenial.prep_14} && ${nodejs.packages_xenial.apt_pinning} && apt-get -qq update && apt-get -qq -y install ${nodejs.packages_xenial.apt}
+  args:
+    tests_cmdline: "${system.homedir.linux}/DeepSpeech/ds/taskcluster/tc-node-tests-prod.sh 14.x 8k"
+  metadata:
+    name: "DeepSpeech Linux AMD64 CPU NodeJS MultiArch Package 14.x prod tests (8kHz)"
+    description: "Testing DeepSpeech for Linux/AMD64 on NodeJS MultiArch Package v14.x on prod model, CPU only, optimized version (8kHz)"
--- a/taskcluster/test-nodejs_14x_8k_multiarchpkg-linux-tflite-opt.yml
+++ b/taskcluster/test-nodejs_14x_8k_multiarchpkg-linux-tflite-opt.yml
@ -0,0 +1,15 @@
+build:
+  template_file: test-linux-opt-base.tyml
+  docker_image: "ubuntu:16.04"
+  dependencies:
+    - "node-package-tflite"
+    - "test-training_8k-linux-amd64-py36m-opt"
+  test_model_task: "test-training_8k-linux-amd64-py36m-opt"
+  system_setup:
+    >
+      ${nodejs.packages_xenial.prep_14} && ${nodejs.packages_xenial.apt_pinning} && apt-get -qq update && apt-get -qq -y install ${nodejs.packages_xenial.apt}
+  args:
+    tests_cmdline: "${system.homedir.linux}/DeepSpeech/ds/taskcluster/tc-node_tflite-tests.sh 14.x 8k"
+  metadata:
+    name: "DeepSpeech Linux AMD64 TFLite NodeJS MultiArch Package 14.x tests (8kHz)"
+    description: "Testing DeepSpeech for Linux/AMD64 on NodeJS MultiArch Package v14.x, TFLite only, optimized version (8kHz)"
--- a/taskcluster/test-nodejs_14x_8k_tflite-linux-amd64-prod-opt.yml
+++ b/taskcluster/test-nodejs_14x_8k_tflite-linux-amd64-prod-opt.yml
@ -0,0 +1,13 @@
+build:
+  template_file: test-linux-opt-base.tyml
+  docker_image: "ubuntu:16.04"
+  dependencies:
+    - "linux-amd64-tflite-opt"
+  system_setup:
+    >
+      ${nodejs.packages_xenial.prep_14} && ${nodejs.packages_xenial.apt_pinning} && apt-get -qq update && apt-get -qq -y install ${nodejs.packages_xenial.apt}
+  args:
+    tests_cmdline: "${system.homedir.linux}/DeepSpeech/ds/taskcluster/tc-node_tflite-tests-prod.sh 14.x 8k"
+  metadata:
+    name: "DeepSpeech Linux AMD64 TFLite NodeJS 14.x prod tests (8kHz)"
+    description: "Testing DeepSpeech for Linux/AMD64 on NodeJS v14.x on prod model, TFLite, optimized version (8kHz)"
--- a/taskcluster/test-nodejs_14x_multiarchpkg-armbian-arm64-opt.yml
+++ b/taskcluster/test-nodejs_14x_multiarchpkg-armbian-arm64-opt.yml
@ -0,0 +1,14 @@
+build:
+  template_file: test-armbian-opt-base.tyml
+  dependencies:
+    - "node-package-cpu"
+    - "test-training_16k-linux-amd64-py36m-opt"
+  test_model_task: "test-training_16k-linux-amd64-py36m-opt"
+  system_setup:
+    >
+      ${nodejs.packages_buster.prep_14} && ${nodejs.packages_buster.apt_pinning} && apt-get -qq update && apt-get -qq -y install ${nodejs.packages_buster.apt}
+  args:
+    tests_cmdline: "${system.homedir.linux}/DeepSpeech/ds/taskcluster/tc-node_tflite-tests.sh 14.x 16k"
+  metadata:
+    name: "DeepSpeech ARMbian ARM64 Cortex-A53 CPU NodeJS MultiArch Package 14.x tests"
+    description: "Testing DeepSpeech for ARMbian ARM64 Cortex-A53 on NodeJS MultiArch Package v14.x, CPU only, optimized version"
--- a/taskcluster/test-nodejs_14x_multiarchpkg-darwin-amd64-opt.yml
+++ b/taskcluster/test-nodejs_14x_multiarchpkg-darwin-amd64-opt.yml
@ -0,0 +1,15 @@
+build:
+  template_file: test-darwin-opt-base.tyml
+  dependencies:
+    - "node-package-cpu"
+    - "test-training_16k-linux-amd64-py36m-opt"
+    - "homebrew_tests-darwin-amd64"
+  test_model_task: "test-training_16k-linux-amd64-py36m-opt"
+  system_setup:
+    >
+      ${nodejs.brew.prep_14}
+  args:
+    tests_cmdline: "$TASKCLUSTER_TASK_DIR/DeepSpeech/ds/taskcluster/tc-node-tests.sh 14.x 16k"
+  metadata:
+    name: "DeepSpeech OSX AMD64 CPU NodeJS MultiArch Package 14.x tests"
+    description: "Testing DeepSpeech for OSX/AMD64 on NodeJS MultiArch Package v14.x, CPU only, optimized version"
--- a/taskcluster/test-nodejs_14x_multiarchpkg-darwin-tflite-opt.yml
+++ b/taskcluster/test-nodejs_14x_multiarchpkg-darwin-tflite-opt.yml
@ -0,0 +1,15 @@
+build:
+  template_file: test-darwin-opt-base.tyml
+  dependencies:
+    - "node-package-tflite"
+    - "test-training_16k-linux-amd64-py36m-opt"
+    - "homebrew_tests-darwin-amd64"
+  test_model_task: "test-training_16k-linux-amd64-py36m-opt"
+  system_setup:
+    >
+      ${nodejs.brew.prep_14}
+  args:
+    tests_cmdline: "$TASKCLUSTER_TASK_DIR/DeepSpeech/ds/taskcluster/tc-node_tflite-tests.sh 14.x 16k"
+  metadata:
+    name: "DeepSpeech OSX AMD64 TFLite NodeJS MultiArch Package 14.x tests"
+    description: "Testing DeepSpeech for OSX/AMD64 on NodeJS MultiArch Package v14.x, TFLite only, optimized version"
--- a/taskcluster/test-nodejs_14x_multiarchpkg-raspbian-rpi3-opt.yml
+++ b/taskcluster/test-nodejs_14x_multiarchpkg-raspbian-rpi3-opt.yml
@ -0,0 +1,14 @@
+build:
+  template_file: test-raspbian-opt-base.tyml
+  dependencies:
+    - "node-package-cpu"
+    - "test-training_16k-linux-amd64-py36m-opt"
+  test_model_task: "test-training_16k-linux-amd64-py36m-opt"
+  system_setup:
+    >
+      ${nodejs.packages_buster.prep_14} && ${nodejs.packages_buster.apt_pinning} && apt-get -qq update && apt-get -qq -y install ${nodejs.packages_buster.apt}
+  args:
+    tests_cmdline: "${system.homedir.linux}/DeepSpeech/ds/taskcluster/tc-node_tflite-tests.sh 14.x 16k"
+  metadata:
+    name: "DeepSpeech Raspbian RPi3/ARMv7 CPU NodeJS MultiArch Package 14.x tests"
+    description: "Testing DeepSpeech for Raspbian RPi3/ARMv7 on NodeJS MultiArch Package v14.x, CPU only, optimized version"
--- a/taskcluster/test-nodejs_14x_multiarchpkg-win-amd64-opt.yml
+++ b/taskcluster/test-nodejs_14x_multiarchpkg-win-amd64-opt.yml
@ -0,0 +1,14 @@
+build:
+  template_file: test-win-opt-base.tyml
+  dependencies:
+    - "node-package-cpu"
+    - "test-training_16k-linux-amd64-py36m-opt"
+  test_model_task: "test-training_16k-linux-amd64-py36m-opt"
+  system_setup:
+    >
+      ${system.sox_win} && ${nodejs.win.prep_14}
+  args:
+    tests_cmdline: "${system.homedir.win}/DeepSpeech/ds/taskcluster/tc-node-tests.sh 14.x 16k"
+  metadata:
+    name: "DeepSpeech Windows AMD64 CPU NodeJS MultiArch Package 14.x tests"
+    description: "Testing DeepSpeech for Windows/AMD64 on NodeJS MultiArch Package v14.x, CPU only, optimized version"
--- a/taskcluster/test-nodejs_14x_multiarchpkg-win-cuda-opt.yml
+++ b/taskcluster/test-nodejs_14x_multiarchpkg-win-cuda-opt.yml
@ -0,0 +1,14 @@
+build:
+  template_file: test-win-cuda-opt-base.tyml
+  dependencies:
+    - "node-package-gpu"
+    - "test-training_16k-linux-amd64-py36m-opt"
+  test_model_task: "test-training_16k-linux-amd64-py36m-opt"
+  system_setup:
+    >
+      ${system.sox_win} && ${nodejs.win.prep_14}
+  args:
+    tests_cmdline: "${system.homedir.win}/DeepSpeech/ds/taskcluster/tc-node-tests.sh 14.x 16k cuda"
+  metadata:
+    name: "DeepSpeech Windows AMD64 CUDA NodeJS MultiArch Package 14.x tests"
+    description: "Testing DeepSpeech for Windows/AMD64 on NodeJS MultiArch Package v14.x, CUDA, optimized version"
--- a/taskcluster/test-nodejs_14x_multiarchpkg-win-tflite-opt.yml
+++ b/taskcluster/test-nodejs_14x_multiarchpkg-win-tflite-opt.yml
@ -0,0 +1,14 @@
+build:
+  template_file: test-win-opt-base.tyml
+  dependencies:
+    - "node-package-tflite"
+    - "test-training_16k-linux-amd64-py36m-opt"
+  test_model_task: "test-training_16k-linux-amd64-py36m-opt"
+  system_setup:
+    >
+      ${system.sox_win} && ${nodejs.win.prep_14}
+  args:
+    tests_cmdline: "${system.homedir.win}/DeepSpeech/ds/taskcluster/tc-node_tflite-tests.sh 14.x 16k"
+  metadata:
+    name: "DeepSpeech Windows AMD64 TFLite NodeJS MultiArch Package 14.x tests"
+    description: "Testing DeepSpeech for Windows/AMD64 on NodeJS MultiArch Package v14.x, TFLite only, optimized version"
--- a/taskcluster/test-training-unittests_8k-linux-amd64-py35m-opt.yml
+++ b/taskcluster/test-training-unittests_8k-linux-amd64-py35m-opt.yml
@ -0,0 +1,12 @@
+build:
+    template_file: test-linux-opt-base.tyml
+    dependencies:
+      - "linux-amd64-ctc-opt"
+    system_setup:
+      >
+        apt-get -qq update && apt-get -qq -y install ${training.packages_trusty.apt}
+    args:
+      tests_cmdline: "${system.homedir.linux}/DeepSpeech/ds/taskcluster/tc-train-unittests.sh 3.5.8:m"
+    metadata:
+      name: "DeepSpeech on Linux AMD64 CPU training unittests using Python 3.5"
+      description: "Training unittests DeepSpeech LDC93S1 model for Linux/AMD64 using Python 3.5, for CPU only, and optimized version"
--- a/taskcluster/test-training-unittests_8k-linux-amd64-py36m-opt.yml
+++ b/taskcluster/test-training-unittests_8k-linux-amd64-py36m-opt.yml
@ -0,0 +1,13 @@
+build:
+    template_file: test-linux-opt-base.tyml
+    dependencies:
+      - "linux-amd64-ctc-opt"
+    system_setup:
+      >
+        apt-get -qq update && apt-get -qq -y install ${training.packages_trusty.apt}
+    args:
+      tests_cmdline: "${system.homedir.linux}/DeepSpeech/ds/taskcluster/tc-train-unittests.sh 3.6.10:m"
+    metadata:
+      name: "DeepSpeech on Linux AMD64 CPU training unittests using Python 3.6"
+      description: "Training unittests DeepSpeech LDC93S1 model for Linux/AMD64 using Python 3.6, for CPU only, and optimized version"
+ 
--- a/taskcluster/test-training-unittests_8k-linux-amd64-py37m-opt.yml
+++ b/taskcluster/test-training-unittests_8k-linux-amd64-py37m-opt.yml
@ -0,0 +1,12 @@
+build:
+    template_file: test-linux-opt-base.tyml
+    dependencies:
+      - "linux-amd64-ctc-opt"
+    system_setup:
+      >
+        apt-get -qq update && apt-get -qq -y install ${training.packages_trusty.apt}
+    args:
+      tests_cmdline: "${system.homedir.linux}/DeepSpeech/ds/taskcluster/tc-train-unittests.sh 3.7.6:m"
+    metadata:
+      name: "DeepSpeech on Linux AMD64 CPU training unittests using Python 3.7"
+      description: "Training unittests DeepSpeech LDC93S1 model for Linux/AMD64 using Python 3.7, for CPU only, and optimized version"
--- a/training/deepspeech_training/util/importers.py
+++ b/training/deepspeech_training/util/importers.py
@ -42,15 +42,17 @@ def get_validate_label(args):
    :return: The user-supplied validate_label function
    :type: function
    """
+    # Python 3.5 does not support passing a pathlib.Path to os.path.* methods
    if 'validate_label_locale' not in args or (args.validate_label_locale is None):
        print('WARNING: No --validate_label_locale specified, your might end with inconsistent dataset.')
        return validate_label_eng
-    if not os.path.exists(os.path.abspath(args.validate_label_locale)):
+    validate_label_locale = str(args.validate_label_locale)
+    if not os.path.exists(os.path.abspath(validate_label_locale)):
        print('ERROR: Inexistent --validate_label_locale specified. Please check.')
        return None
-    module_dir = os.path.abspath(os.path.dirname(args.validate_label_locale))
+    module_dir = os.path.abspath(os.path.dirname(validate_label_locale))
    sys.path.insert(1, module_dir)
-    fname = os.path.basename(args.validate_label_locale).replace('.py', '')
+    fname = os.path.basename(validate_label_locale).replace('.py', '')
    locale_module = importlib.import_module(fname, package=None)
    return locale_module.validate_label