add vendoring with go dep

vendor/github.com/influxdata/influxdb/releng/source-tarball/build.bash

@@ -0,0 +1,62 @@
+#!/bin/bash
+
+function printHelp() {
+  >&2 echo \
+"USAGE: $0 [-p INFLUXDB_GIT_DIR]
+            -s INFLUXDB_SHA -b INFLUXDB_BRANCH -v INFLUXDB_VERSION -o OUTDIR
+
+Emits a tarball of influxdb source code and dependencies to OUTDIR.
+
+If using -p flag, directory containing influxdb source code will be used as source of truth.
+This is helpful if you have local commits that have not been pushed.
+
+If not using -p, you must provide -S to clone over SSH.
+"
+}
+
+if [ $# -eq 0 ]; then
+  printHelp
+  exit 1
+fi
+
+SRCDIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+source "$SRCDIR/../_go_versions.sh"
+
+SHA=""
+BRANCH=""
+VERSION=""
+OUTDIR=""
+
+# These variables may expand to command arguments. Don't double quote them when used later.
+INFLUXDB_GIT_MOUNT=""
+
+
+while getopts hs:b:v:o:p:S: arg; do
+  case "$arg" in
+    h) printHelp; exit 1;;
+    s) SHA="$OPTARG";;
+    b) BRANCH="$OPTARG";;
+    v) VERSION="$OPTARG";;
+    o) OUTDIR="$OPTARG";;
+    p) INFLUXDB_GIT_MOUNT="--mount type=bind,src=$OPTARG,dst=/influxdb-git,ro=1";;
+  esac
+done
+
+if [ -z "$OUTDIR" ]; then
+  # Not bothering to check the other variables since they're checked in the inner docker script.
+  printHelp
+  exit 1
+fi
+
+# Only build with GO_CURRENT_VERSION. No need to build source tarball with next version of Go.
+docker build --build-arg "GO_VERSION=$GO_CURRENT_VERSION" -t influxdata/influxdb/releng/source-tarball:latest "$SRCDIR"
+
+mkdir -p "$OUTDIR"
+
+docker run --rm \
+  $INFLUXDB_GIT_MOUNT \
+  --mount "type=bind,src=${OUTDIR},dst=/out" \
+  influxdata/influxdb/releng/source-tarball:latest \
+  -s "$SHA" \
+  -b "$BRANCH" \
+  -v "$VERSION"