Add gopreload as a dependency

backend/christine.website/gopreload.go

@@ -0,0 +1,9 @@
+// gopreload.go
+package main
+
+/*
+   This file is separate to make it very easy to both add into an application, but
+   also very easy to remove.
+*/
+
+import _ "github.com/Xe/gopreload"

vendor-log

@@ -5,3 +5,4 @@ b68094ba95c055dfda888baa8947dfe44c20b1ac	github.com/Xe/asarfs
 33a50704c528b4b00db129f75c693facf7f3838b (dirty)	github.com/Xe/asarfs
 5e4d0891fe789f2da0c2d5afada3b6a1ede6d64c	layeh.com/asar
 3f7ce7b928e14ff890b067e5bbbc80af73690a9c	github.com/urfave/negroni
+f3687a5cd8e600f93e02174f5c0b91b56d54e8d0	github.com/Xe/gopreload

vendor/github.com/Xe/gopreload/doc.go

@@ -0,0 +1,7 @@
+/*
+Package gopreload is a bit of a hack to emulate the behavior of LD_PRELOAD [ld-preload].
+This allows you to have automatically starting instrumentation, etc.
+
+[ld-preload]: http://man7.org/linux/man-pages/man8/ld.so.8.html (see LD_PRELOAD section)
+*/
+package gopreload

vendor/github.com/Xe/gopreload/preload.go

@@ -0,0 +1,26 @@
+//+build linux,go1.8
+
+package gopreload
+
+import (
+	"log"
+	"os"
+	"plugin"
+	"strings"
+)
+
+func init() {
+	gpv := os.Getenv("GO_PRELOAD")
+	if gpv == "" {
+		return
+	}
+
+	for _, elem := range strings.Split(gpv, ",") {
+		log.Printf("gopreload: trying to open: %s", elem)
+		_, err := plugin.Open(elem)
+		if err != nil {
+			log.Printf("%v from GO_PRELOAD cannot be loaded: %v", elem, err)
+			continue
+		}
+	}
+}