support compiling outside git checkout

When building nmrpflash for Debian, there is no 'git' command available,
and there is no '.git' directory either. This makes the build emit
warnings from the $(shell) calls in VERSION variable in the Makefile
and breaks the '-V' option.

The change in this patch accounts for missing 'git' command and resorts
to using a STANDALONE_VERSION environment variable which in turn is
provided by the package build mechanics.

This change has no effect when the git command is available and the
'.git' directory is present.

diff --git a/Makefile b/Makefile
index 797aaac08de47f645d8bf95a1c235f875acebee7..04ad2d547c5276c83d0b3f4acc023f5240e866bf 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 CC ?= gcc
 PREFIX ?= /usr/local
-VERSION = $(shell git describe --always | tail -c +2)
+VERSION := $(shell if [ -d .git ] && which git 2>&1 > /dev/null; then git describe --always | tail -c +2; else echo $$STANDALONE_VERSION; fi)
 LIBS = -lpcap
 CFLAGS += -Wall -g -DNMRPFLASH_VERSION=\"$(VERSION)\"
 LDFLAGS += $(LIBS)