Start integrating Hugo in the new plugin

Former-commit-id: dcc6bd82b3d3a89637a1032aad1a25d0b1f80046 [formerly 8784cd37bf58e81cdbe1bcec00e6f16b58efc915] [formerly 9e25850e063ae0825de337d5d5f29cee601b9040 [formerly 8b1d36dfb9ebfa001ddeef98034bb5a73d135c94]]
Former-commit-id: 04a38bea2d141093570d9289d0d0a056a136fe8a [formerly 5995538504889e698aa6cd35b7da40c38b5d5ddf]
Former-commit-id: 8c81a0b060167e1a2983a99bc87b380838ac07dc

caddy/hugo/utils.go

@@ -0,0 +1,15 @@
+package hugo
+
+import (
+	"os"
+	"os/exec"
+)
+
+// Run executes an external command
+func Run(command string, args []string, path string) error {
+	cmd := exec.Command(command, args...)
+	cmd.Dir = path
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	return cmd.Run()
+}