1 files changed, 52 insertions, 0 deletions
diff --git a/src/share/yang/modules/utils/check-revisions.sh.in b/src/share/yang/modules/utils/check-revisions.sh.in
new file mode 100644
index 0000000..5990100
--- /dev/null
+++ b/src/share/yang/modules/utils/check-revisions.sh.in
@@ -0,0 +1,52 @@
+#!/bin/sh
+
+# Copyright (C) 2018-2022 Internet Systems Consortium, Inc. ("ISC")
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+# Check revisions
+#
+# This developer script verifies versions in module contents match
+# the version in the name.
+# Requires yanglint to translate YANG to YIN formats.
+# Fixme: use xlstproc to extract the revision.
+
+# Exit with error if commands exit with non-zero and if undefined variables are
+# used.
+set -eu
+
+# Change directory to the YANG modules' directory.
+cd "@abs_top_srcdir@/src/share/yang/modules"
+
+exit_code=0
+
+LIBYANG_PREFIX='@LIBYANG_PREFIX@'
+
+# Find yanglint.
+if test -f "${LIBYANG_PREFIX}/bin/yanglint"; then
+    yanglint="${LIBYANG_PREFIX}/bin/yanglint"
+    LD_LIBRARY_PATH="${LD_LIBRARY_PATH-}:${LIBYANG_PREFIX}/lib:${LIBYANG_PREFIX}/lib64"
+    export LD_LIBRARY_PATH
+elif command -v yanglint; then
+    yanglint='yanglint'
+else
+    exit_code=$((exit_code | 2))
+    printf 'ERROR: cannot find yanglint.\n' >&2
+    exit "${exit_code}"
+fi
+
+for m in *.yang; do
+    rev1=$("${yanglint}" -f yin "${m}" | grep '<revision date=' | head -1 | sed \
+ 's/.*<revision date="\([0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]\)".*/\1/')
+    rev2=$(echo "${m}" | sed \
+ 's/.*@\([0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]\)\..*/\1/')
+
+    if test "${rev1}" != "${rev2}"; then
+        exit_code=$((exit_code | 4))
+        printf 'ERROR: revision mismatch on module %s: revision date is %s, file name has %s.\n' "${m}" "${rev1}" "${rev2}" >&2
+    fi
+done
+
+exit "${exit_code}"