From a1e17ca9b98a2b0915a55091b97a8ad1b942279b Mon Sep 17 00:00:00 2001
From: Matthew Holt <mholt@users.noreply.github.com>
Date: Fri, 22 May 2020 10:31:34 -0600
Subject: [PATCH] Honor CGO_ENABLED environment variable (fix #17)

---
 builder.go         | 2 +-
 cmd/xcaddy/main.go | 3 +++
 platforms.go       | 9 +++++++++
 3 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/builder.go b/builder.go
index ed21912..24553ac 100644
--- a/builder.go
+++ b/builder.go
@@ -83,7 +83,7 @@ func (b Builder) Build(ctx context.Context, outputFile string) error {
 	env = setEnv(env, "GOOS="+b.OS)
 	env = setEnv(env, "GOARCH="+b.Arch)
 	env = setEnv(env, "GOARM="+b.ARM)
-	env = setEnv(env, fmt.Sprintf("CGO_ENABLED=%t", b.Cgo))
+	env = setEnv(env, fmt.Sprintf("CGO_ENABLED=%s", b.Compile.CgoEnabled()))
 
 	log.Println("[INFO] Building Caddy")
 
diff --git a/cmd/xcaddy/main.go b/cmd/xcaddy/main.go
index 81ae3ed..d1fe9f0 100644
--- a/cmd/xcaddy/main.go
+++ b/cmd/xcaddy/main.go
@@ -109,6 +109,9 @@ func runBuild(ctx context.Context, args []string) error {
 
 	// perform the build
 	builder := xcaddy.Builder{
+		Compile: xcaddy.Compile{
+			Cgo: os.Getenv("CGO_ENABLED") == "1",
+		},
 		CaddyVersion: caddyVersion,
 		Plugins:      plugins,
 		Replacements: replacements,
diff --git a/platforms.go b/platforms.go
index 94b3227..b336fa8 100644
--- a/platforms.go
+++ b/platforms.go
@@ -11,6 +11,15 @@ type Compile struct {
 	Cgo bool `json:"cgo,omitempty"`
 }
 
+// CgoEnabled returns "1" if c.Cgo is true, "0" otherwise.
+// This is used for setting the CGO_ENABLED env variable.
+func (c Compile) CgoEnabled() string {
+	if c.Cgo {
+		return "1"
+	}
+	return "0"
+}
+
 // Platform represents a build target.
 type Platform struct {
 	OS   string `json:"os,omitempty"`