Provide minified style spec and use it where applicable

src/style-spec/feature_filter/index.js

@@ -3,7 +3,7 @@
 import {createExpression} from '../expression/index.js';
 import {isFeatureConstant} from '../expression/is_constant.js';
 import {deepUnbundle} from '../util/unbundle_jsonlint.js';
-import latest from '../reference/latest.js';
+import {min as latest} from '../reference/latest.js';
 import type {GlobalProperties, Feature} from '../expression/index.js';
 import type {CanonicalTileID} from '../../source/tile_id.js';
 import type Point from '@mapbox/point-geometry';

src/style-spec/reference/latest.js

@@ -1,7 +1,8 @@
 // @flow
 
-import spec from './v8.json';
+import * as spec from './v8.json';
 
-export type StyleReference = typeof spec;
+export type StyleReference = typeof spec.default;
 
-export default spec;
+export default spec.default;
+export const min = spec.default;

src/style-spec/rollup.config.js

@@ -3,7 +3,6 @@ import replace from '@rollup/plugin-replace';
 import resolve from '@rollup/plugin-node-resolve';
 import commonjs from '@rollup/plugin-commonjs';
 import unassert from 'rollup-plugin-unassert';
-import json from '@rollup/plugin-json';
 import {flow} from '../../build/rollup_plugins.js';
 
 // Build es modules?
@@ -12,6 +11,8 @@ const esm = 'esm' in process.env;
 import {fileURLToPath} from 'url';
 const __dirname = fileURLToPath(new URL('.', import.meta.url));
 
+const reviver = (key, value) => ['doc', 'example'].includes(key) ? undefined : value;
+
 const config = [{
  input: `${__dirname}/style-spec.js`,
  output: {
@@ -46,8 +47,33 @@ const config = [{
  '_token_stack:': ''
  }
  }),
+ replace({
+ include: /\/reference\/latest\.js$/,
+ delimiters: ['', ''],
+ values: {
+ 'export const min = spec.default': 'export const min = spec.min'
+ }
+ }),
  flow(),
- json(),
+ {
+ name: 'json-min',
+ transform(code, id) {
+ if (id.endsWith('.json')) {
+ const json = JSON.parse(code);
+ const min = JSON.stringify(json, reviver);
+ const full = JSON.stringify(json);
+ code = `export default ${full}`;
+ if (min !== full) {
+ code += `\nexport const min = ${min}`;
+ }
+ return {
+ code,
+ map: null
+ };
+ }
+ return null;
+ }
+ },
  unassert(),
  resolve({
  browser: true,

src/style-spec/style-spec.js

@@ -66,7 +66,7 @@ export type StylePropertySpecification = {
 };
 
 import v8 from './reference/v8.json';
-import latest from './reference/latest.js';
+import latest, {min as latestWithoutDocsAndExamples} from './reference/latest.js';
 import format from './format.js';
 import migrate from './migrate.js';
 import composite from './composite.js';
@@ -109,6 +109,7 @@ const visit = {eachSource, eachLayer, eachProperty};
 export {
  v8,
  latest,
+ latestWithoutDocsAndExamples,
  format,
  migrate,
  composite,