build system: version.sh: initial implementation.

1 files changed, 61 insertions, 0 deletions

diff --git a/sysinfo/version.sh b/sysinfo/version.sh
new file mode 100755
index 0000000..fb1e8c3
--- /dev/null
+++ b/sysinfo/version.sh
@@ -0,0 +1,61 @@
+#!/bin/sh
+
+usage()
+{
+cat << EOF >&2
+
+Usage:
+  -h            show this HELP message
+  -s  SRCDIR    set source directory
+  -o  OUTPUT    set output header
+  -p  PREFIX    set macro prefix
+
+EOF
+exit 1
+}
+
+
+# one
+workdir=$(pwd)
+srcdir=
+output=
+prefix=
+
+
+while getopts "hs:o:p:" opt; do
+	case $opt in
+	h)
+  		usage
+  		;;
+	s)
+    		srcdir="$OPTARG"
+    		;;
+	o)
+    		output="$OPTARG"
+    		;;
+	p)
+    		prefix="$OPTARG"
+    		;;
+	\?)
+    		printf "Invalid option: -%s" "$OPTARG" >&2
+    		usage
+    		;;
+	esac
+done
+
+
+# two
+if [ -z "$srcdir" ] || [ -z "$output" ] || [ -z "$prefix" ]; then
+	usage
+fi
+
+cd "$srcdir" || exit 2
+
+gitver=`git rev-parse --verify HEAD` || gitver="unknown"
+macro=`echo "$prefix"_GIT_VERSION | tr '[:lower:]' '[:upper:]'`
+
+cd "$workdir" || exit 2
+printf "#define $macro\t\"$gitver\"\n" > "$output"
+
+# all done
+exit 0