Fetch ds_ctcdecoder from VERSION-based URL by default

Fixes #1801

tc-tests-utils.sh

@@ -373,6 +373,28 @@ verify_bazel_rebuild()
   fi;
 }
 
+# Should be called from context where Python virtualenv is set
+verify_ctcdecoder_url()
+{
+  default_url=$(python util/taskcluster.py --decoder)
+  echo "${default_url}" | grep -F "deepspeech.native_client.v${DS_VERSION}"
+  rc_default_url=$?
+
+  tag_url=$(python util/taskcluster.py --decoder --branch 'v1.2.3')
+  echo "${tag_url}" | grep -F "deepspeech.native_client.v1.2.3"
+  rc_tag_url=$?
+
+  master_url=$(python util/taskcluster.py --decoder --branch 'master')
+  echo "${master_url}" | grep -F "deepspeech.native_client.master"
+  rc_master_url=$?
+
+  if [ ${rc_default_url} -eq 0 -a ${rc_tag_url} -eq 0 -a ${rc_master_url} -eq 0 ]; then
+    return 0
+  else
+    return 1
+  fi;
+}
+
 do_bazel_build()
 {
   cd ${DS_ROOT_TASK}/DeepSpeech/tf

tc-train-tests.sh

@@ -43,6 +43,10 @@ source ${PYENV_ROOT}/versions/${pyver}/envs/${PYENV_NAME}/bin/activate
 
 pip install --upgrade -r ${HOME}/DeepSpeech/ds/requirements.txt | cat
 
+pushd ${HOME}/DeepSpeech/ds/
+    verify_ctcdecoder_url
+popd
+
 platform=$(python -c 'import sys; import platform; plat = platform.system().lower(); arch = platform.machine().lower(); plat = "manylinux1" if plat == "linux" and arch == "x86_64" else plat; plat = "macosx_10_10" if plat == "darwin" else plat; sys.stdout.write("%s_%s" % (plat, platform.machine()));')
 whl_ds_version="$(python -c 'from pkg_resources import parse_version; print(parse_version("'${DS_VERSION}'"))')"
 decoder_pkg="ds_ctcdecoder-${whl_ds_version}-cp${pyver_pkg}-cp${pyver_pkg}${py_unicode_type}-${platform}.whl"

util/taskcluster.py

@@ -79,7 +79,7 @@ if __name__ == '__main__':
                         help='Name of the artifact to download. Defaults to "native_client.tar.xz"')
     parser.add_argument('--source', required=False, default=None,
                         help='Name of the TaskCluster scheme to use.')
-    parser.add_argument('--branch', required=False, default='master',
+    parser.add_argument('--branch', required=False,
                         help='Branch name to use. Defaulting to "master".')
     parser.add_argument('--decoder', action='store_true',
                         help='Get URL to ds_ctcdecoder Python package.')
@@ -103,6 +103,11 @@ if __name__ == '__main__':
         else:
             args.arch = 'cpu'
 
+    has_branch_set = True
+    if not args.branch:
+        has_branch_set = False
+        args.branch = 'master'
+
     if args.decoder:
         plat = platform.system().lower()
         arch = platform.machine()
@@ -113,7 +118,11 @@ if __name__ == '__main__':
         if plat == 'darwin':
             plat = 'macosx_10_10'
 
-        ds_version = parse_version(read('../VERSION'))
+        version_string = read('../VERSION').strip()
+        ds_version = parse_version(version_string)
+
+        if not has_branch_set:
+            args.branch = "v{}".format(version_string)
 
         m_or_mu = 'mu' if is_ucs2 else 'm'
         pyver = ''.join(map(str, sys.version_info[0:2]))