feat(update): add update deployment via web UI

- Deploy exe to alternate port 5033
- Current instance keeps running
- Add parallel mode and addr flag
- Add update panel to web UI
- Update OpenAPI spec and CLI

lib/config/ports.go

@@ -0,0 +1,41 @@
+package config
+
+import (
+	"net"
+	"path/filepath"
+	"strconv"
+)
+
+const (
+	PortPrimary   = 5032
+	PortAlternate = 5033
+	UpdatesSubdir = "updates"
+)
+
+// AlternateListenAddr returns the other blue-green port (5032 <-> 5033).
+func AlternateListenAddr(current string) (string, error) {
+	host, portStr, err := net.SplitHostPort(current)
+	if err != nil {
+		return "", err
+	}
+	if host == "" {
+		host = "0.0.0.0"
+	}
+	port, err := strconv.Atoi(portStr)
+	if err != nil {
+		return "", err
+	}
+	next := PortAlternate
+	if port == PortAlternate {
+		next = PortPrimary
+	}
+	return net.JoinHostPort(host, strconv.Itoa(next)), nil
+}
+
+func UpdatesDir() (string, error) {
+	base, err := InstallDir()
+	if err != nil {
+		return "", err
+	}
+	return filepath.Join(base, UpdatesSubdir), nil
+}

lib/config/ports_test.go

@@ -0,0 +1,14 @@
+package config
+
+import "testing"
+
+func TestAlternateListenAddr(t *testing.T) {
+	next, err := AlternateListenAddr("0.0.0.0:5032")
+	if err != nil || next != "0.0.0.0:5033" {
+		t.Fatalf("5032 -> %q, %v", next, err)
+	}
+	next, err = AlternateListenAddr("0.0.0.0:5033")
+	if err != nil || next != "0.0.0.0:5032" {
+		t.Fatalf("5033 -> %q, %v", next, err)
+	}
+}