From b79dae403e790a686118d6bf82b3468d4e7f6674 Mon Sep 17 00:00:00 2001
From: Matt Leung <leung.matt.p@gmail.com>
Date: Fri, 8 Sep 2017 02:27:02 -0700
Subject: [PATCH] Let agent pass filter expression string for builds

Drone agent accepts DRONE_FILTER env var
---
 cmd/drone-agent/agent.go | 1 +
 cmd/drone-agent/main.go  | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/cmd/drone-agent/agent.go b/cmd/drone-agent/agent.go
index 50264f4f3..9e67df4d4 100644
--- a/cmd/drone-agent/agent.go
+++ b/cmd/drone-agent/agent.go
@@ -32,6 +32,7 @@ func loop(c *cli.Context) error {
 		Labels: map[string]string{
 			"platform": c.String("platform"),
 		},
+		Expr: c.String("drone-filter"),
 	}
 
 	hostname := c.String("hostname")
diff --git a/cmd/drone-agent/main.go b/cmd/drone-agent/main.go
index 87a2b836a..76ae95578 100644
--- a/cmd/drone-agent/main.go
+++ b/cmd/drone-agent/main.go
@@ -48,6 +48,11 @@ func main() {
 			Name:   "platform",
 			Value:  "linux/amd64",
 		},
+		cli.StringFlag{
+			EnvVar: "DRONE_FILTER",
+			Name:   "drone-filter",
+			Usage:  "A filter expression used to restrict builds by label",
+		},
 		cli.IntFlag{
 			EnvVar: "DRONE_MAX_PROCS",
 			Name:   "max-procs",