Last version component is now generated fully automatically

1 files changed, 27 insertions, 0 deletions

diff --git a/version b/version
new file mode 100755
index 0000000..b967060
--- /dev/null
+++ b/version
@@ -0,0 +1,27 @@
+#!/bin/sh
+# TODO: Think of a way to generate version without git repository for source tarballs. Making the script overwrite
+#       itself with a static version sounds good enough, really.
+try_tag() {
+	local tag
+	if tag=$(git describe --exact-match --tags --dirty=-dirty 2>/dev/null); then
+		case "${tag}" in
+			*-dirty) return 1;;
+			*) echo "${tag}"; return 0;;
+		esac
+	fi
+	return 1
+}
+
+
+if ! version=$(try_tag); then
+	fmt=%Y%m%d
+	set -- $(git rev-list --date=format:${fmt} --pretty=%ad --no-commit-header --since=yesterday HEAD)
+	if [ $# -gt 0 ]; then
+		suffix=$#
+		git diff-index --quiet HEAD -- || suffix=$(( $# + 1 ))
+		version="$1.${suffix}"
+	else
+		version="$(date +${fmt}).1"
+	fi
+fi
+echo "${version}"