From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Fri, 29 Nov 2019 20:18:14 +0000 (+0000)
Subject: build system: Cope if HEAD refers to a packed ref
X-Git-Tag: v0.6.0~264
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?a=commitdiff_plain;h=7ed45a3d3997513bbfb009787dd5f158cb465653;p=secnet.git

build system: Cope if HEAD refers to a packed ref

In this case, there may be no corresponding .git/refs/<whatever>.
Simply tolerate this.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---

diff --git a/Subdir.sd.mk b/Subdir.sd.mk
index 4d7d35f..ead5f51 100644
--- a/Subdir.sd.mk
+++ b/Subdir.sd.mk
@@ -112,7 +112,7 @@ secnet:	$(OBJECTS)
 ifneq (,$(wildcard .git/HEAD))
 # If we have (eg) committed, relink and thus regenerate the version
 # with the new info from git describe.
-secnet: Makefile .git/HEAD $(shell sed -n 's#^ref: #.git/#p' .git/HEAD)
+secnet: Makefile .git/HEAD $(wildcard $(shell sed -n 's#^ref: #.git/#p' .git/HEAD))
 secnet: $(wildcard .git/packed-refs)
 endif