publishing with in-process hugo function calls

hugo.go

@@ -2,7 +2,6 @@ package caddyhugo
 
 import (
 	"fmt"
-	"os/exec"
 	"path"
 	"time"
 
@@ -24,9 +23,8 @@ func (ch *CaddyHugo) Publish() error {
 	if err != nil {
 		return err
 	}
-	cmd := exec.Command("hugo")
-	cmd.Dir = ch.Dir
-	_, err = cmd.CombinedOutput()
+
+	err = buildSite(ch.HugoSites)
 	if err != nil {
 		return err
 	}