1 files changed, 35 insertions, 0 deletions
diff --git a/share/genbuild.sh b/share/genbuild.sh
new file mode 100755
index 0000000000..d959877dc8
--- /dev/null
+++ b/share/genbuild.sh
@@ -0,0 +1,35 @@
+#!/bin/sh
+
+if [ $# -gt 0 ]; then
+    FILE="$1"
+    shift
+    if [ -f "$FILE" ]; then
+        INFO="$(head -n 1 "$FILE")"
+    fi
+else
+    echo "Usage: $0 <filename>"
+    exit 1
+fi
+
+if [ -e "$(which git)" ]; then
+    # clean 'dirty' status of touched files that haven't been modified
+    git diff >/dev/null 2>/dev/null 
+
+    # get a string like "v0.6.0-66-g59887e8-dirty"
+    DESC="$(git describe --dirty 2>/dev/null)"
+
+    # get a string like "2012-04-10 16:27:19 +0200"
+    TIME="$(git log -n 1 --format="%ci")"
+fi
+
+if [ -n "$DESC" ]; then
+    NEWINFO="#define BUILD_DESC \"$DESC\""
+else
+    NEWINFO="// No build information available"
+fi
+
+# only update build.h if necessary
+if [ "$INFO" != "$NEWINFO" ]; then
+    echo "$NEWINFO" >"$FILE"
+    echo "#define BUILD_DATE \"$TIME\"" >>"$FILE"
+fi