luci.mk: fix branch detection in detached HEAD state

When LuCI is checked out via pinned feeds configuration, its source tree will
end up in detached head state, requiring some more magic to figure out the
proper branch.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

diff --git a/luci.mk b/luci.mk
index 69aecaa..26f3c94 100644 (file)
--- a/luci.mk
+++ b/luci.mk
@@ -70,7 +70,9 @@ PKG_VERSION?=$(if $(DUMP),x,$(strip $(shell \
 PKG_GITBRANCH?=$(if $(DUMP),x,$(strip $(shell \
        variant="LuCI"; \
        if git log -1 >/dev/null 2>/dev/null; then \
-               branch="$$(git symbolic-ref --short -q HEAD 2>/dev/null)"; \
+               branch="$$(git symbolic-ref --short -q HEAD 2>/dev/null || \
+                       git branch --remote --verbose --no-abbrev --contains 2>/dev/null | \
+                               sed -e 's|^.*/||; s| .*||; q')"; \
                if [ "$$branch" != "master" ]; then \
                        variant="LuCI $$branch branch"; \
                else \