build.sh: Fix tarball name

'meson dist' produces tarball name based on the latest tag,
not on the date of run.

Fixes: 2e8b3b2 ("build.sh: Add support for meson dist")
Fixes: 6d1f6e0 ("build.sh: Fix testing release build")
Signed-off-by: Petr Vorel <[email protected]>

build.sh

@@ -133,12 +133,37 @@ install()
 dist()
 {
 	local formats="xztar,gztar,zip"
-	local tag="$(date +%Y%m%d)"
+	local tag="$(git describe --abbrev=0)"
 	local f
 
+	# FIXME: debug
+	git --version
+	echo "tag: '$tag'"
+	echo "date: '$(date +%Y%m%d)'"
+
+	echo "=== pwd ('$PWD') ==="
+	pwd
+	echo
+	# FIXME: debug
+
 	echo "=== dist ($formats) ==="
 	meson dist -C $BUILD_DIR --formats $formats
 
+	# FIXME: debug
+	echo "ret: $?"
+	echo
+	echo "=== pwd ('$PWD') ==="
+	pwd
+	echo
+
+	echo "=== find $BUILD_DIR ==="
+	find $BUILD_DIR
+	echo
+
+	#echo "ls $BUILD_DIR/meson-dist/"
+	#ls -lah $BUILD_DIR/meson-dist/
+	# FIXME: debug
+
 	for f in $(echo "$formats" | sed 's/,/ /g'); do
 		f=$(echo "$f" | sed 's/\(.*\)tar/tar.\1/')
 		f=$BUILD_DIR/meson-dist/iputils-$tag.$f