Add license selector

scripts/package.json

@@ -21,6 +21,7 @@
   "dependencies": {
     "eta": "^1.12.3",
     "file-saver": "^2.0.5",
+    "front-matter": "^4.0.2",
     "jszip": "^3.10.1"
   }
 }

scripts/src/lib/Template.svelte

@@ -5,13 +5,15 @@
     import DownloadIcon from "./DownloadIcon.svelte";
     import { nameToModId } from "./template/template";
     import { getMinorMinecraftVersion } from "./template/java";
+    import { licenses, licensesMap } from "./template/license";
 
     let minecraftVersion: string;
     let projectName = "Template Mod";
     let packageName = "com.example";
     let useKotlin = false;
     let dataGeneration = false;
     let splitSources = true;
+    let license = "MIT License";
 
     let customModId: string | undefined;
     let loading = false;
@@ -107,6 +109,7 @@
             useKotlin,
             dataGeneration: dataGeneration && supportsDataGen,
             splitSources: splitSources && supportsSplitSources,
+            license: licensesMap.get(license)!,
         };
 
         const zip = new JSZip();
@@ -202,6 +205,23 @@
             </select>
         </div>
 
+        <div class="form-line">
+            <h3>Mod License:</h3>
+            <hr />
+            <p>
+                Select the license you wish to use for your mod. For help with choosing a license please visit GitHub's <a href="https://choosealicense.com/" target="_blank" rel="noopener noreferrer">https://choosealicense.com/</a> website.
+            </p>
+            <select
+                id="license"
+                bind:value={license}
+                style="width: 200px"
+            >
+            {#each licenses as license}
+                <option value={license.name}>{license.name}</option>
+            {/each}
+            </select>
+        </div>
+
         <hr>
         <br>
 

scripts/src/lib/template/git.ts

@@ -2,10 +2,8 @@ import type { ComputedConfiguration, TemplateWriter } from "./template";
 
 import gitignore from './templates/git/gitignore?raw';
 import workflow from './templates/git/workflow.yml?raw';
-import license from './templates/git/LICENSE?raw';
 
 export async function addGitFiles(writer: TemplateWriter, config: ComputedConfiguration) {
     await writer.write('.gitignore', gitignore);
     await writer.write('.github/workflows/build.yml', workflow);
-    await writer.write('LICENSE', license);
 }

scripts/src/lib/template/license.ts

@@ -0,0 +1,80 @@
+import frontMatter from 'front-matter'
+import type { ComputedConfiguration, TemplateWriter } from './template';
+
+const licensesRaw = import.meta.glob("./licenses/*.txt", { as: "raw", eager: true });
+const headersRaw = import.meta.glob("./licenses/headers/*.txt", { as: "raw", eager: true });
+
+const currentYear = new Date().getFullYear().toString();
+
+// https://github.com/desktop/desktop/blob/af7b8ae7d1f88ba93e01731cdd7d070ee7ca4a7e/script/build.ts#L16
+interface ChooseALicense {
+  readonly title: string
+  readonly nickname?: string
+  readonly "spdx-id": string
+}
+
+interface Header {
+  readonly "spdx-id": string
+}
+
+export type License = {
+  readonly name: string
+  readonly id: string
+  readonly body: string
+};
+
+export const licenses = Object.values(licensesRaw)
+                  .map(parseLicense)
+                  .sort((a, b) => a.name.localeCompare(b.name));
+export const licensesMap = new Map(licenses.map(l => [l.name, l]));
+export const licenseHeaders = new Map(Object.values(headersRaw).map(parseHeader));
+
+function parseLicense(content: string): License {
+  const result = frontMatter<ChooseALicense>(content);
+
+  return {
+    name: result.attributes.nickname || result.attributes.title,
+    id: result.attributes['spdx-id'],
+    body: result.body,
+  };
+}
+
+function parseHeader(content: string): [string, string] {
+  const result = frontMatter<Header>(content);
+  const headerText = result.body.trim()
+  return [result.attributes['spdx-id'], headerText]
+}
+
+export function fillLicensePlaceholders(text: string): string {
+  // TODO [fullname]?
+  // TODO [modname]
+  return text.replaceAll("[yyyy]", currentYear);
+}
+
+export function applyHeader(text: string, license: License): string {
+  const header = licenseHeaders.get(license.id);
+
+  if (header == undefined) {
+    return text;
+  }
+
+  return commentBlock(fillLicensePlaceholders(header)) + "\n\n" + text;
+}
+
+export async function addLicense(writer: TemplateWriter, options: ComputedConfiguration): Promise<void> {
+  writer.write("LICENSE", fillLicensePlaceholders(options.license.body));
+}
+
+/*
+ * Blah
+ */
+function commentBlock(header: string): string {
+  var lines = ["/*"];
+
+  for (var line of header.split("\n")) {
+    lines.push(" * " + line);
+  }
+
+  lines.push(" */")
+  return lines.join("\n");
+}