final: refactor for removal of system package and reduction of interactions to state package

State query command has been moved to main where it belongs, "system" information are now fetched in app.New and stored in *App with accessors for relevant values. Exit (cleanup-related) functions are separated into its dedicated "final" package.

Signed-off-by: Ophestra Umiker <cat@ophivana.moe>

internal/system/retrieve.go

@@ -1,28 +0,0 @@
-package system
-
-import (
-	"fmt"
-	"os"
-	"path"
-	"strconv"
-)
-
-func Retrieve() {
-	if V != nil {
-		panic("system info retrieved twice")
-	}
-
-	v := &Values{Share: path.Join(os.TempDir(), "fortify."+strconv.Itoa(os.Geteuid()))}
-
-	if r, ok := os.LookupEnv(xdgRuntimeDir); !ok {
-		fmt.Println("Env variable", xdgRuntimeDir, "unset")
-
-		// too early for fatal
-		os.Exit(1)
-	} else {
-		v.Runtime = r
-		v.RunDir = path.Join(v.Runtime, "fortify")
-	}
-
-	V = v
-}

internal/system/value.go

@@ -1,13 +0,0 @@
-package system
-
-const (
-	xdgRuntimeDir = "XDG_RUNTIME_DIR"
-)
-
-type Values struct {
-	Share   string
-	Runtime string
-	RunDir  string
-}
-
-var V *Values