feat: order/delay in service files, enable cmd, --all on unit commands

- install/uninstall/start/stop/enable take <name> or --all; *all kept as shortcuts
- add enable (enable at boot + start); startall no longer enables
- order/delay resolved by config.ResolveOrder and written into systemd,
  OpenRC and runit service files (After=/sleep), so they apply at boot
- install --all stops and disables units before removing their files
- update regenerates all installed, enabled units and removes disabled ones
- edit creates the config dir; docs and man page updated
- tests: fake Init for cmd, ResolveOrder, backend ordering output

openrc/openrc_test.go

@@ -5,6 +5,7 @@ import (
 	"path/filepath"
 	"strings"
 	"testing"
+	"time"
 
 	"github.com/warkanum/unitdore/config"
 	"github.com/warkanum/unitdore/service"
@@ -219,3 +220,34 @@ func TestParseStatus(t *testing.T) {
 		}
 	}
 }
+
+func TestGenerate_OrderAndDelay(t *testing.T) {
+	setup(t)
+	u := config.Unit{Name: "web", Runtime: "podman", Enabled: true, After: []string{"db", "cache"}, StartDelay: 5 * time.Second}
+	got, err := Backend{}.Generate(u, "p-", "")
+	if err != nil {
+		t.Fatal(err)
+	}
+	mustContain(t, got, "need net\n\tafter unitdore-p-db unitdore-p-cache\n}", "start_pre() {\n\tsleep 5\n}")
+}
+
+func TestGenerate_OneshotDelay(t *testing.T) {
+	setup(t)
+	u := config.Unit{Name: "job", Runtime: "exec", Executable: "/bin/true", ServiceType: "oneshot", Enabled: true, StartDelay: time.Second}
+	got, err := Backend{}.Generate(u, "", "")
+	if err != nil {
+		t.Fatal(err)
+	}
+	mustContain(t, got, "start_pre() {\n\tsleep 1\n}")
+}
+
+func TestGenerate_NoOrderNoExtras(t *testing.T) {
+	setup(t)
+	got, err := Backend{}.Generate(config.Unit{Name: "a", Runtime: "podman", Enabled: true}, "", "")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if strings.Contains(got, "after ") || strings.Contains(got, "start_pre") {
+		t.Errorf("unexpected ordering output:\n%s", got)
+	}
+}