@aws-cdk/cx-api
Version:
Cloud executable protocol
198 lines • 28 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
/**
* Generate FEATURE_FLAGS.md, a report of all current feature flags
*/
const fs_1 = require("fs");
const path = require("path");
const validate_flags_1 = require("./validate-flags");
const feats = require("../lib/features");
const flag_modeling_1 = require("../lib/private/flag-modeling");
async function main() {
(0, validate_flags_1.validateFlags)();
await updateMarkdownFile(path.join(__dirname, '..', 'FEATURE_FLAGS.md'), {
table: flagsTable(),
details: flagsDetails(),
json: recommendedJson(),
removed: removedFlags(),
diff: changedFlags(),
migratejson: migrateJson(),
});
// Write to the package root
await updateRecommendedFlagsFile(path.join(__dirname, '..', '..', 'recommended-feature-flags.json'));
}
function flagsTable() {
return renderTable([
['Flag', 'Summary', 'Since', 'Type'],
...v2flags().map(([name, flag]) => [
renderLink(mdEsc(name), githubHeadingLink(flagDetailsHeading(name, flag))),
flag.summary,
flag.introducedIn.v2 ?? '',
renderType(flag.type, 'short'),
]),
]);
}
function removedFlags() {
const removedInV2 = flags(flag => flag.introducedIn.v2 === undefined && flag.introducedIn.v1 !== undefined);
return renderTable([
['Flag', 'Summary', 'Type', 'Since'],
...removedInV2.map(([name, flag]) => [
renderLink(mdEsc(name), githubHeadingLink(flagDetailsHeading(name, flag))),
flag.summary,
renderType(flag.type, 'short'),
flag.introducedIn.v1 ?? '',
]),
]);
}
function changedFlags() {
const changedInV2 = flags(flag => !!flag.unconfiguredBehavesLike?.v2 && !!flag.introducedIn.v2);
return renderTable([
['Flag', 'Summary', 'Type', 'Since', 'v1 default', 'v2 default'],
...changedInV2.map(([name, flag]) => [
renderLink(mdEsc(name), githubHeadingLink(flagDetailsHeading(name, flag))),
flag.summary,
renderType(flag.type, 'short'),
flag.introducedIn.v1 ?? '',
renderValue(false),
renderValue(flag.unconfiguredBehavesLike?.v2),
]),
]);
}
function migrateJson() {
const changedInV2 = flags(flag => !!flag.unconfiguredBehavesLike?.v2 && !!flag.introducedIn.v2 && !!flag.introducedIn.v1);
const context = Object.fromEntries(changedInV2.map(([name, _]) => [name, false]));
return [
'```json',
JSON.stringify({ context }, undefined, 2),
'```',
].join('\n');
}
function flagsDetails() {
const allFlags = flags(_ => true);
return allFlags.flatMap(([name, flag]) => [
`### ${flagDetailsHeading(name, flag)}`,
'',
`*${flag.summary}*`,
'',
`Flag type: ${renderType(flag.type, 'long')}`,
'',
dedent(flag.detailsMd),
'',
renderTable([
['Since', 'Unset behaves like', 'Recommended value'],
// V1
flag.introducedIn.v1
? [flag.introducedIn.v1, renderValue(false), renderValue(flag.recommendedValue)]
: ['(not in v1)', '', ''],
// V2
flag.introducedIn.v2
? [flag.introducedIn.v2, renderValue(flag.unconfiguredBehavesLike?.v2 ?? false), renderValue(flag.recommendedValue)]
: flag.unconfiguredBehavesLike?.v2 !== undefined
? ['(not configurable in v2)', renderValue(flag.unconfiguredBehavesLike?.v2), '']
: ['(not in v2)', '', ''],
]),
...oldBehavior(flag) ? [
`**Compatibility with old behavior:** ${oldBehavior(flag)}`,
'',
] : [],
'',
]).join('\n');
}
function oldBehavior(flag) {
switch (flag.type) {
case flag_modeling_1.FlagType.ApiDefault: return flag.compatibilityWithOldBehaviorMd;
case flag_modeling_1.FlagType.BugFix: return flag.compatibilityWithOldBehaviorMd;
case flag_modeling_1.FlagType.VisibleContext: return undefined;
case flag_modeling_1.FlagType.Temporary: return flag.compatibilityWithOldBehaviorMd;
}
}
function recommendedJson() {
return [
'```json',
JSON.stringify({ context: feats.CURRENTLY_RECOMMENDED_FLAGS }, undefined, 2),
'```',
].join('\n');
}
function v2flags() {
return flags(flag => flag.introducedIn.v2 !== undefined);
}
function flags(pred) {
const entries = Object.entries(feats.FLAGS)
.filter(([_, flag]) => pred(flag));
entries.sort((a, b) => firstCmp(
// Sort by versions first
(0, flag_modeling_1.compareVersions)(a[1].introducedIn.v2, b[1].introducedIn.v2), (0, flag_modeling_1.compareVersions)(a[1].introducedIn.v1, b[1].introducedIn.v1),
// Then sort by name
a[0].localeCompare(b[0])));
return entries;
}
function renderType(type, flavor) {
switch (type) {
case flag_modeling_1.FlagType.ApiDefault: return longShort('New default behavior', 'new default');
case flag_modeling_1.FlagType.BugFix: return longShort('Backwards incompatible bugfix', 'fix');
case flag_modeling_1.FlagType.VisibleContext: return longShort('Configuration option', 'config');
case flag_modeling_1.FlagType.Temporary: return longShort('Temporary flag', 'temporary');
}
function longShort(long, short) {
return flavor === 'long' ? long : short;
}
}
function renderTable(rows) {
return [
'',
'| ' + rows[0].join(' | ') + ' |',
'| ' + rows[0].map(_ => '-----').join(' | ') + ' |',
...rows.slice(1).map(row => '| ' + row.join(' | ') + ' |'),
'',
].join('\n');
}
/**
* Return the heading that will be used to caption this flag's details
*/
function flagDetailsHeading(name, _) {
return name;
}
/**
* Return a link that is valid on GitHub to refer to a heading
*/
function githubHeadingLink(heading) {
return `#${heading.toLowerCase().replace(/ /g, '-').replace(/[^a-z0-9_-]/g, '')}`;
}
/**
* Remove shared leading whitespace from all non-empty lines
*/
function dedent(body) {
const lines = body.split('\n').filter((x) => x.trim() !== '');
const leadingWs = lines.map(x => x.match(/^ */)?.[0].length ?? 0);
const sharedWs = Math.min(...leadingWs);
const re = new RegExp('^' + ' '.repeat(sharedWs), 'mg');
return body.replace(re, '').trim();
}
function renderValue(x) {
return `\`${JSON.stringify(x)}\``;
}
function renderLink(caption, link) {
return `[${caption}](${link})`;
}
function mdEsc(x) {
return x.replace(/_/g, '\\_');
}
async function updateMarkdownFile(filename, sections) {
let contents = await fs_1.promises.readFile(filename, { encoding: 'utf-8' });
for (const [section, value] of Object.entries(sections)) {
const re = new RegExp(`<!-- BEGIN ${section} -->(.*)<!-- END ${section} -->`, 's');
contents = contents.replace(re, `<!-- BEGIN ${section} -->\n${value}\n<!-- END ${section} -->`);
}
await fs_1.promises.writeFile(filename, contents, { encoding: 'utf-8' });
}
async function updateRecommendedFlagsFile(filename) {
await fs_1.promises.writeFile(filename, JSON.stringify(feats.CURRENTLY_RECOMMENDED_FLAGS, undefined, 2), { encoding: 'utf-8' });
}
function firstCmp(...xs) {
return xs.find(x => x !== 0) ?? 0;
}
main().catch(e => {
console.error(e);
process.exitCode = 1;
});
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* Generate FEATURE_FLAGS.md, a report of all current feature flags\n */\nimport { promises as fs } from 'fs';\nimport * as path from 'path';\nimport { validateFlags } from './validate-flags';\nimport * as feats from '../lib/features';\nimport { FlagInfo, FlagType, compareVersions } from '../lib/private/flag-modeling';\n\nasync function main() {\n  validateFlags();\n\n  await updateMarkdownFile(path.join(__dirname, '..', 'FEATURE_FLAGS.md'), {\n    table: flagsTable(),\n    details: flagsDetails(),\n    json: recommendedJson(),\n    removed: removedFlags(),\n    diff: changedFlags(),\n    migratejson: migrateJson(),\n  });\n\n  // Write to the package root\n  await updateRecommendedFlagsFile(path.join(__dirname, '..', '..', 'recommended-feature-flags.json'));\n}\n\nfunction flagsTable() {\n  return renderTable([\n    ['Flag', 'Summary', 'Since', 'Type'],\n    ...v2flags().map(([name, flag]) =>\n      [\n        renderLink(mdEsc(name), githubHeadingLink(flagDetailsHeading(name, flag))),\n        flag.summary,\n        flag.introducedIn.v2 ?? '',\n        renderType(flag.type, 'short'),\n      ],\n    ),\n  ]);\n}\n\nfunction removedFlags() {\n  const removedInV2 = flags(flag => flag.introducedIn.v2 === undefined && flag.introducedIn.v1 !== undefined);\n\n  return renderTable([\n    ['Flag', 'Summary', 'Type', 'Since'],\n    ...removedInV2.map(([name, flag]) => [\n      renderLink(mdEsc(name), githubHeadingLink(flagDetailsHeading(name, flag))),\n      flag.summary,\n      renderType(flag.type, 'short'),\n      flag.introducedIn.v1 ?? '',\n    ]),\n  ]);\n}\n\nfunction changedFlags() {\n  const changedInV2 = flags(flag => !!flag.unconfiguredBehavesLike?.v2 && !!flag.introducedIn.v2);\n\n  return renderTable([\n    ['Flag', 'Summary', 'Type', 'Since', 'v1 default', 'v2 default'],\n    ...changedInV2.map(([name, flag]) => [\n      renderLink(mdEsc(name), githubHeadingLink(flagDetailsHeading(name, flag))),\n      flag.summary,\n      renderType(flag.type, 'short'),\n      flag.introducedIn.v1 ?? '',\n      renderValue(false),\n      renderValue(flag.unconfiguredBehavesLike?.v2),\n    ]),\n  ]);\n}\n\nfunction migrateJson() {\n  const changedInV2 = flags(flag => !!flag.unconfiguredBehavesLike?.v2 && !!flag.introducedIn.v2 && !!flag.introducedIn.v1);\n\n  const context = Object.fromEntries(changedInV2.map(([name, _]) => [name, false]));\n\n  return [\n    '```json',\n    JSON.stringify({ context }, undefined, 2),\n    '```',\n  ].join('\\n');\n}\n\nfunction flagsDetails() {\n  const allFlags = flags(_ => true);\n\n  return allFlags.flatMap(([name, flag]) => [\n    `### ${flagDetailsHeading(name, flag)}`,\n    '',\n    `*${flag.summary}*`,\n    '',\n    `Flag type: ${renderType(flag.type, 'long')}`,\n    '',\n    dedent(flag.detailsMd),\n    '',\n    renderTable([\n      ['Since', 'Unset behaves like', 'Recommended value'],\n\n      // V1\n      flag.introducedIn.v1\n        ? [flag.introducedIn.v1, renderValue(false), renderValue(flag.recommendedValue)]\n        : ['(not in v1)', '', ''],\n\n      // V2\n      flag.introducedIn.v2\n        ? [flag.introducedIn.v2, renderValue(flag.unconfiguredBehavesLike?.v2 ?? false), renderValue(flag.recommendedValue)]\n        : flag.unconfiguredBehavesLike?.v2 !== undefined\n          ? ['(not configurable in v2)', renderValue(flag.unconfiguredBehavesLike?.v2), '']\n          : ['(not in v2)', '', ''],\n    ]),\n    ...oldBehavior(flag) ? [\n      `**Compatibility with old behavior:** ${oldBehavior(flag)}`,\n      '',\n    ] : [],\n    '',\n  ]).join('\\n');\n}\n\nfunction oldBehavior(flag: FlagInfo): string | undefined {\n  switch (flag.type) {\n    case FlagType.ApiDefault: return flag.compatibilityWithOldBehaviorMd;\n    case FlagType.BugFix: return flag.compatibilityWithOldBehaviorMd;\n    case FlagType.VisibleContext: return undefined;\n    case FlagType.Temporary: return flag.compatibilityWithOldBehaviorMd;\n  }\n}\n\nfunction recommendedJson() {\n  return [\n    '```json',\n    JSON.stringify({ context: feats.CURRENTLY_RECOMMENDED_FLAGS }, undefined, 2),\n    '```',\n  ].join('\\n');\n}\n\nfunction v2flags() {\n  return flags(flag => flag.introducedIn.v2 !== undefined);\n}\n\nfunction flags(pred: (x: FlagInfo) => boolean) {\n  const entries = Object.entries(feats.FLAGS)\n    .filter(([_, flag]) => pred(flag));\n\n  entries.sort((a, b) => firstCmp(\n    // Sort by versions first\n    compareVersions(a[1].introducedIn.v2, b[1].introducedIn.v2),\n    compareVersions(a[1].introducedIn.v1, b[1].introducedIn.v1),\n    // Then sort by name\n    a[0].localeCompare(b[0])));\n\n  return entries;\n}\n\nfunction renderType(type: FlagType, flavor: 'short' | 'long'): string {\n  switch (type) {\n    case FlagType.ApiDefault: return longShort('New default behavior', 'new default');\n    case FlagType.BugFix: return longShort('Backwards incompatible bugfix', 'fix');\n    case FlagType.VisibleContext: return longShort('Configuration option', 'config');\n    case FlagType.Temporary: return longShort('Temporary flag', 'temporary');\n  }\n\n  function longShort(long: string, short: string) {\n    return flavor === 'long' ? long : short;\n  }\n}\n\nfunction renderTable(rows: string[][]) {\n  return [\n    '',\n    '| ' + rows[0].join(' | ') + ' |',\n    '| ' + rows[0].map(_ => '-----').join(' | ') + ' |',\n    ...rows.slice(1).map(row => '| ' + row.join(' | ') + ' |'),\n    '',\n  ].join('\\n');\n}\n\n/**\n * Return the heading that will be used to caption this flag's details\n */\nfunction flagDetailsHeading(name: string, _: FlagInfo) {\n  return name;\n}\n\n/**\n * Return a link that is valid on GitHub to refer to a heading\n */\nfunction githubHeadingLink(heading: string) {\n  return `#${heading.toLowerCase().replace(/ /g, '-').replace(/[^a-z0-9_-]/g, '')}`;\n}\n\n/**\n * Remove shared leading whitespace from all non-empty lines\n */\nfunction dedent(body: string) {\n  const lines = body.split('\\n').filter((x) => x.trim() !== '');\n  const leadingWs = lines.map(x => x.match(/^ */)?.[0].length ?? 0);\n  const sharedWs = Math.min(...leadingWs);\n  const re = new RegExp('^' + ' '.repeat(sharedWs), 'mg');\n  return body.replace(re, '').trim();\n}\n\nfunction renderValue(x: any) {\n  return `\\`${JSON.stringify(x)}\\``;\n}\n\nfunction renderLink(caption: string, link: string) {\n  return `[${caption}](${link})`;\n}\n\nfunction mdEsc(x: string) {\n  return x.replace(/_/g, '\\\\_');\n}\n\nasync function updateMarkdownFile(filename: string, sections: Record<string, string>) {\n  let contents = await fs.readFile(filename, { encoding: 'utf-8' });\n\n  for (const [section, value] of Object.entries(sections)) {\n    const re = new RegExp(`<!-- BEGIN ${section} -->(.*)<!-- END ${section} -->`, 's');\n    contents = contents.replace(re, `<!-- BEGIN ${section} -->\\n${value}\\n<!-- END ${section} -->`);\n  }\n\n  await fs.writeFile(filename, contents, { encoding: 'utf-8' });\n}\n\nasync function updateRecommendedFlagsFile(filename: string) {\n  await fs.writeFile(filename, JSON.stringify(feats.CURRENTLY_RECOMMENDED_FLAGS, undefined, 2), { encoding: 'utf-8' });\n}\n\nfunction firstCmp(...xs: number[]) {\n  return xs.find(x => x !== 0) ?? 0;\n}\n\nmain().catch(e => {\n  console.error(e);\n  process.exitCode = 1;\n});\n"]}