Use CTFE more for version information

Basically pull everything from dub.json that we can

dub.json

@@ -1,8 +1,9 @@
 {
 	"authors": ["Steven vanZyl <rushsteve1@rushsteve1.us>"],
-	"copyright": "Copyright © 2021, Steven vanZyl",
+	"copyright": "Copyright © 2022, Steven vanZyl",
 	"description": "A near drop-in replacement for rm that uses the trash bin",
 	"version": "18",
+	"versionName": "M. Bison",
 	"license": "MIT",
 	"name": "trash-d",
 	"homepage": "https://github.com/rushsteve1/trash-d",

source/trash/ver.d

@@ -4,30 +4,49 @@ Version and copyright information that gets bundled in with trash-d
 
 module trash.ver;
 
+import std.conv : to;
 import std.format : format;
+import std.json;
+
+/// The dub.json file inlined as a string
+const string DUB_JSON = import("dub.json");
 
 /// trash-d is versioned sequentially starting at 1
 const int VER = version_from_json();
 
 /// Ever major release is given a new name
 /// Names are based on video game bosses
-const string VER_NAME = "M. Bison";
+const string VER_NAME = version_name_from_json();
 
 /// The full version string
 const string VER_TEXT = format("trash-d version %s '%s'", VER, VER_NAME);
 
 /// The short copyright text and info
-const string COPY_TEXT = "Copyright (C) 2021 Steven vanZyl.
-License MIT <https://mit-license.org/>.
-Fork on GitHub <https://github.com/rushsteve1/trash-d>
+const string COPY_TEXT = copy_text_from_json();
 
-This is free software: you are free to change and redistribute it.
-There is NO WARRANTY, to the extent permitted by law.
+private int version_from_json() {
+	return DUB_JSON.parseJSON()["version"].str.to!int;
+}
+
+private string version_name_from_json() {
+	return DUB_JSON.parseJSON()["versionName"].str;
+}
+
+private string copy_text_from_json() {
+	import std.range;
+	import std.array;
+	import std.algorithm;
+
+	auto j = DUB_JSON.parseJSON();
+	string authors = j["authors"].array.map!(`a.str`).join(", ");
 
-Written by Steven vanZyl <rushsteve1@rushsteve1.us>.";
+	return format("%s
+License %s <https://spdx.org/licenses/%s.html>.
+Fork on GitHub <%s>
 
-int version_from_json() {
-	import std.json, std.conv;
+This is free software: you are free to change and redistribute it.
+There is NO WARRANTY, to the extent permitted by law.
 
-	return import("dub.json").parseJSON()["version"].str.to!int;
+Written by %s.", j["copyright"].str, j["license"].str, j["license"].str,
+			j["homepage"].str, authors);
 }