1 files changed, 37 insertions, 0 deletions
diff --git a/utils/gen-version.sh b/utils/gen-version.sh
new file mode 100755
index 00000000..b3003d7a
--- /dev/null
+++ b/utils/gen-version.sh
@@ -0,0 +1,37 @@
+#!/bin/sh
+
+# SPDX-License-Identifier: GPL-2.0-or-later
+# Generate a version string using git describe
+
+if [ -n "$1" ]
+then
+	cd "$1" 2>/dev/null || exit 1
+fi
+
+# Get a short description from the tree.
+version=$(git describe --abbrev=8 --match "v[0-9]*" 2>/dev/null)
+
+if [ -z "$version" ]
+then
+	# Handle an un-tagged repository
+	sha=$(git describe --abbrev=8 --always 2>/dev/null)
+	commits=$(git log --oneline | wc -l 2>/dev/null)
+	version=v0.0.$commits.$sha
+fi
+
+# Prevent changed timestamps causing -dirty labels
+git update-index --refresh > /dev/null 2>&1
+dirty=$(git diff-index --name-only HEAD 2>/dev/null) || dirty=
+
+# Strip the 'g', and replace the preceeding '-' with a '+' to denote a label
+version=$(echo "$version" | sed -e 's/-g/+/g')
+
+# Fix the '-' (the patch count) to a '.' as a version increment.
+version=$(echo "$version" | sed -e 's/-/./g')
+
+if [ -n "$dirty" ]
+then
+	version=$version-dirty
+fi
+
+echo "$version"