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dbapp/static/leaflet-tree/rollup-config.mjs

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+// copied and adapted from leaftlet repository
+import {readFileSync} from 'node:fs';
+
+import json from '@rollup/plugin-json';
+import {simpleGit} from 'simple-git';
+import del from 'rollup-plugin-delete';
+import rollupGitVersion from 'rollup-plugin-git-version';
+
+import pkg from './package.json' with { type: 'json' };
+
+const release = process.env.NODE_ENV === 'release';
+const version = await getVersion();
+const banner = createBanner(version);
+
+/** @type {import('rollup').RollupOptions} */
+const config = {
+    input: 'LayersTree.js',
+    output: [
+        {
+            file: './dist/LayersTree-umd.js',
+            name: 'LayersTree',
+            format: 'umd',
+            banner,
+            globals: {leaflet: 'L'},
+        },
+        {
+            file: './dist/LayersTree.js',
+            name: 'LayersTree',
+            format: 'es',
+            banner,
+        },
+    ],
+    plugins: [
+        del({targets: 'dist'}),
+        release ? json() : rollupGitVersion(),
+        {
+            name: 'copy-plugin-assets',
+            generateBundle() {
+                const fileNames = [
+                    'L.Control.Layers.Tree.css',
+                    'L.Control.Layers.Tree.d.ts',
+                    'L.Control.Layers.Tree.js',
+                    'LayersTree.d.ts',
+                ];
+                for (const fileName of fileNames) {
+                    const source = readFileSync(new URL(`./${fileName}`, import.meta.url));
+                    this.emitFile({type: 'asset', fileName, source: `${banner}${source}`});
+                }
+            },
+        },
+    ],
+    external: ['leaflet'],
+    watch: {
+        include: ['LayersTree.js'],
+    },
+};
+
+export default config;
+
+async function getVersion() {
+    // Skip the git branch+rev in the banner when doing a release build
+    if (release) {
+        return pkg.version;
+    }
+
+    const git = simpleGit();
+    const branch = (await git.branch()).current;
+    const commit = await git.revparse(['--short', 'HEAD']);
+
+    return `${pkg.version}+${branch}.${commit}`;
+}
+
+export function createBanner(version) {
+    return `/*
+ * Leaflet Control Layers Tree ${version}, a Leaflet plugin.
+ * (c) 2017-${new Date().getFullYear()} Javier Jimenez Shaw
+ */
+`;
+}