From 7225e2704f0e1a1f06c6aed9665da843293fd186 Mon Sep 17 00:00:00 2001
From: Seigo Uchida <spesnova@gmail.com>
Date: Thu, 28 Sep 2017 23:12:15 +0900
Subject: [PATCH] Enable to set Trace Environment via env-var

This change makes docker-dd-agent users to set Trace Environment
via environment variable.
For example, when you add `DD_TRACE_CONF_ENV=staging`, new lines
will be added in datadog.conf like this:

```
[trace.config]
env = staging
```
---
 entrypoint.sh | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/entrypoint.sh b/entrypoint.sh
index c46e9a11..9375dd3f 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -27,6 +27,12 @@ stderr_logfile=\/dev\/stderr\
 stderr_logfile_maxbytes=0' ${DD_ETC_ROOT}/supervisor.conf
 fi
 
+##### Trace Agent config #####
+if [ ! "${DD_TRACE_CONF_ENV}" = "" ]; then
+  sed -i -e '$ a [trace.config]' ${DD_ETC_ROOT}/datadog.conf
+  sed -i -e "$ a env = ${DD_TRACE_CONF_ENV}" ${DD_ETC_ROOT}/datadog.conf
+fi
+
 ##### Integrations config #####
 
 if [ $KUBERNETES ]; then