Refactor build

scripts/version

@@ -0,0 +1,27 @@
+#!/bin/bash
+
+if [ -n "$(git status --porcelain --untracked-files=no)" ]; then
+    DIRTY="-dirty"
+fi
+
+COMMIT=$(git rev-parse --short HEAD)
+GIT_TAG=${DRONE_TAG:-$(git tag -l --contains HEAD | head -n 1)}
+
+if [[ -z "$DIRTY" && -n "$GIT_TAG" ]]; then
+    VERSION=$GIT_TAG
+else
+    VERSION="${COMMIT}${DIRTY}"
+fi
+
+if [ -z "$ARCH" ]; then
+    ARCH=$(go env GOHOSTARCH)
+fi
+
+SUFFIX="-${ARCH}"
+
+TAG=${TAG:-${VERSION}${SUFFIX}}
+REPO=${REPO:-rancher}
+
+if echo $TAG | grep -q dirty; then
+    TAG=dev
+fi