From 26c1183941029cd4989bdcc3eab126df19902a14 Mon Sep 17 00:00:00 2001
From: Denton Gentry <dgentry@tailscale.com>
Date: Sun, 8 Aug 2021 18:37:37 -0700
Subject: [PATCH] hostinfo: add fly.io detection

Signed-off-by: Denton Gentry <dgentry@tailscale.com>
---
 hostinfo/hostinfo.go | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/hostinfo/hostinfo.go b/hostinfo/hostinfo.go
index 58c8e9de3..794b383af 100644
--- a/hostinfo/hostinfo.go
+++ b/hostinfo/hostinfo.go
@@ -28,6 +28,7 @@ const (
 	Heroku          = EnvType("hr")
 	AzureAppService = EnvType("az")
 	AWSFargate      = EnvType("fg")
+	FlyDotIo        = EnvType("fly")
 )
 
 var envType atomic.Value // of EnvType
@@ -57,6 +58,9 @@ func getEnvType() EnvType {
 	if inAWSFargate() {
 		return AWSFargate
 	}
+	if inFlyDotIo() {
+		return FlyDotIo
+	}
 	return ""
 }
 
@@ -126,3 +130,10 @@ func inAWSFargate() bool {
 	}
 	return false
 }
+
+func inFlyDotIo() bool {
+	if os.Getenv("FLY_APP_NAME") != "" && os.Getenv("FLY_REGION") != "" {
+		return true
+	}
+	return false
+}