git commit hash generator

buildscripts/git-commit-id.sh

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+
+CONST_FILE=build-constants.go
+
+cat > $CONST_FILE <<EOF
+/*
+ * ** DO NOT EDIT THIS FILE. THIS FILE IS AUTO GENERATED BY RUNNING MAKE **
+ */
+
+package main
+
+const (
+	gitCommitHash = "__GIT_COMMIT_HASH__"
+)
+EOF
+
+commit_id=$(git log --format="%H" -n 1)
+sed -i "s/__GIT_COMMIT_HASH__/$commit_id/" $CONST_FILE
+