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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
export const newtabFileHeader = () => {
let licenseString = [
"/* This Source Code Form is subject to the terms of the Mozilla Public",
" * License, v. 2.0. If a copy of the MPL was not distributed with this",
].join("\n");
let commentString = [
"/* DO NOT EDIT this file directly, instead modify the relevant *.nova.tokens.json file",
" * and run `mach buildtokens` to see your changes. */",
].join("\n");
let backwardCompatString = [
"/*",
" * @backward-compat { version 155 }",
" * Nova design token overrides are gated on the `browser.design-tokens.nova` pref in",
" * tokens-shared.css, which is NOT enabled when HNT ships its Nova experience (gated",
" * on `browser.newtabpage.activity-stream.nova.enabled`). Since the newtab extension",
" * can train-hop, it cannot rely on toolkit CSS behind a pref gate. This file provides",
" * those token values directly so nova/activity-stream.css is self-contained.",
" * Remove this file when `browser.nova.enabled` unifies both prefs and reaches Release.",
" */",
].join("\n");
let header =
licenseString +
"\n\n" +
commentString +
"\n\n" +
backwardCompatString +
"\n\n";
return header;
};