Add Arrcus YANG modules.

vendor/arrcus/README.md

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+This directory contains YANG models for Arrcus. There is for now one sub-directory:
+
+* **arcos**  - models that are specific to ArcOS
+
+Each subdirectory may have further OS information in a README file.

vendor/arrcus/arcos/check.sh

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+#!/bin/bash -xv
+#
+# Vendor-specific check script. Assumes that pyang is on path and that
+# all standard modules are on its internal module path.
+#
+# Deviation modules are NOT checked as they require specific imports
+# typically not available locally.
+#
+# This script will only be run for the last release of a version branch.
+# When a new set of models is committed for a version, the previous
+# should be removed.
+#
+platform_dir="vendor/arrcus/"
+
+# NOTE: please just have the directories you are checking here
+to_check="arcos/v521"
+
+debug=0
+
+checkDir () {
+    if [ "$debug" -eq "1" ]; then
+	echo Checking yang files in $platform_dir/$1
+    fi
+    exit_status=""
+    cwd=`pwd`
+    cd $1
+    to_process=`grep -L arcos-*.yang`
+    for f in $to_process; do
+	if [ "$debug" -eq "1" ]; then
+	    echo Checking $f...
+	fi
+	errors=`pyang $yanglint_flags $f 2>&1 | grep -v "warning:"`
+	if [ ! -z "$errors" ]; then
+	    printf "PYANG: Errors in $f\n"
+	    printf "$errors\n"
+	    exit_status="failed!"
+	    # if [ "$debug" -eq "1" ]; then
+	    # 	printf "\n\n*** EARLY EXIT DUE TO ERROR ***\n\n"
+	    # 	exit 1
+	    # fi
+	fi
+    done
+    cd $cwd
+
+    if [ ! -z "$exit_status" ]; then
+       exit 1
+    fi
+}
+
+if [ "$debug" -eq "1" ]; then
+    printf "\nChecking modules with yanglint, using 'lax quote checks' via perlre filtering\n"
+fi
+
+if [ -e "$platform_dir" ]; then
+    cd $platform_dir
+fi
+
+# for d in $to_check; do
+#     checkDir $d
+# done
+
+declare -a pids
+for d in $to_check; do
+    (checkDir $d) &
+    pids+=("$!")
+done
+
+for p in $pids; do
+    wait $p || exit 1
+done