internal/info: relocate from internal

This is cleaner and makes more sense. The longer LDFLAGS was never a valid concern since it is always inserted by a script.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/info/path.go

@@ -0,0 +1,33 @@
+package info
+
+import (
+	"log"
+
+	"hakurei.app/container/check"
+)
+
+// Absolute paths to the Hakurei installation.
+//
+// These are set by the linker.
+var hakureiPath, hsuPath string
+
+// MustHakureiPath returns the [check.Absolute] path to hakurei.
+func MustHakureiPath() *check.Absolute { return mustCheckPath(log.Fatal, "hakurei", hakureiPath) }
+
+// MustHsuPath returns the [check.Absolute] to hsu.
+func MustHsuPath() *check.Absolute { return mustCheckPath(log.Fatal, "hsu", hsuPath) }
+
+// mustCheckPath checks a pathname to not be zero, then [check.NewAbs], calling fatal if either step fails.
+func mustCheckPath(fatal func(v ...any), name, pathname string) *check.Absolute {
+	if pathname != "" {
+		if a, err := check.NewAbs(pathname); err != nil {
+			fatal(err.Error())
+			return nil // unreachable
+		} else {
+			return a
+		}
+	} else {
+		fatal("invalid " + name + " path, this program is compiled incorrectly")
+		return nil // unreachable
+	}
+}