forked from babel/babel
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build-data.js
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build-data.js
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"use strict";
const fs = require("fs");
const path = require("path");
const semver = require("semver");
const flattenDeep = require("lodash/flattenDeep");
const mapValues = require("lodash/mapValues");
const pickBy = require("lodash/pickBy");
const { unreleasedLabels } = require("@babel/helper-compilation-targets");
const electronToChromiumVersions = require("electron-to-chromium").versions;
const electronToChromiumKeys = Object.keys(
electronToChromiumVersions
).reverse();
const chromiumToElectronMap = electronToChromiumKeys.reduce((all, electron) => {
all[electronToChromiumVersions[electron]] = +electron;
return all;
}, {});
const chromiumToElectronVersions = Object.keys(chromiumToElectronMap);
const findClosestElectronVersion = targetVersion => {
const chromiumVersionsLength = chromiumToElectronVersions.length;
const maxChromium = +chromiumToElectronVersions[chromiumVersionsLength - 1];
if (targetVersion > maxChromium) return null;
const closestChrome = chromiumToElectronVersions.find(
version => targetVersion <= version
);
return chromiumToElectronMap[closestChrome];
};
const chromiumToElectron = chromium =>
chromiumToElectronMap[chromium] || findClosestElectronVersion(chromium);
const renameTests = (tests, getName, category) =>
tests.map(test =>
Object.assign({}, test, { name: getName(test.name), category })
);
// The following is adapted from compat-table:
// https://github.com/kangax/compat-table/blob/gh-pages/build.js
//
// It parses and interpolates data so environments that "equal" other
// environments (node4 and chrome45), as well as familial relationships (edge
// and ie11) can be handled properly.
const envs = require("../build/compat-table/environments");
const byTestSuite = suite => browser => {
return Array.isArray(browser.test_suites)
? browser.test_suites.indexOf(suite) > -1
: true;
};
const compatSources = ["es5", "es6", "es2016plus", "esnext"].reduce(
(result, source) => {
const data = require(`../build/compat-table/data-${source}`);
data.browsers = pickBy(envs, byTestSuite(source));
result.push(data);
return result;
},
[]
);
const interpolateAllResults = (rawBrowsers, tests) => {
const interpolateResults = res => {
let browser;
let prevBrowser;
let result;
let prevResult;
let prevBid;
for (const bid in rawBrowsers) {
// For browsers that are essentially equal to other browsers,
// copy over the results.
browser = rawBrowsers[bid];
if (browser.equals && res[bid] === undefined) {
result = res[browser.equals];
res[bid] =
browser.ignore_flagged && result === "flagged" ? false : result;
// For each browser, check if the previous browser has the same
// browser full name (e.g. Firefox) or family name (e.g. Chakra) as this one.
} else if (
prevBrowser &&
(prevBrowser.full.replace(/,.+$/, "") ===
browser.full.replace(/,.+$/, "") ||
(browser.family !== undefined &&
prevBrowser.family === browser.family))
) {
// For each test, check if the previous browser has a result
// that this browser lacks.
result = res[bid];
prevResult = res[prevBid];
if (prevResult !== undefined && result === undefined) {
res[bid] = prevResult;
}
}
prevBrowser = browser;
prevBid = bid;
}
};
// Now print the results.
tests.forEach(function(t) {
// Calculate the result totals for tests which consist solely of subtests.
if ("subtests" in t) {
t.subtests.forEach(function(e) {
interpolateResults(e.res);
});
} else {
interpolateResults(t.res);
}
});
};
compatSources.forEach(({ browsers, tests }) =>
interpolateAllResults(browsers, tests)
);
// End of compat-table code adaptation
const environments = [
"chrome",
"opera",
"edge",
"firefox",
"safari",
"node",
"ie",
"android",
"ios",
"phantom",
"samsung",
];
const compatibilityTests = flattenDeep(
compatSources.map(data =>
data.tests.map(test => {
return test.subtests
? [
test,
renameTests(
test.subtests,
name => test.name + " / " + name,
test.category
),
]
: test;
})
)
);
const getLowestImplementedVersion = ({ features }, env) => {
const tests = compatibilityTests
.filter(test => {
return (
features.indexOf(test.name) >= 0 ||
// for features === ["DataView"]
// it covers "DataView (Int8)" and "DataView (UInt8)"
(features.length === 1 && test.name.indexOf(features[0]) === 0)
);
})
.reduce((result, test) => {
if (!test.subtests) {
result.push({
name: test.name,
res: test.res,
});
} else {
test.subtests.forEach(subtest =>
result.push({
name: `${test.name}/${subtest.name}`,
res: subtest.res,
})
);
}
return result;
}, []);
const unreleasedLabelForEnv = unreleasedLabels[env];
const envTests = tests.map(({ res: test }, i) => {
const reportedVersions = Object.keys(test)
.filter(t => t.startsWith(env))
.map(t => {
const version = t.replace(/_/g, ".").replace(env, "");
return {
version,
semver: semver.coerce(version) || version,
// Babel assumes strict mode
implements: tests[i].res[t] === true || tests[i].res[t] === "strict",
};
})
// version must be label from the unreleasedLabels (like tp) or number.
.filter(
version =>
unreleasedLabelForEnv === version.version ||
!isNaN(parseFloat(version.version))
)
// Sort in desc order, with unreleasedLabelForEnv coming last.
.sort(({ semver: av }, { semver: bv }) => {
if (av === unreleasedLabelForEnv) return -1;
if (bv === unreleasedLabelForEnv) return 1;
if (semver.gt(av, bv)) return -1;
if (semver.gt(bv, av)) return 1;
return 0;
});
// Find the lowest version such that all higher versions implement it.
// Eg, given { chrome70: true, chrome60: false, chrome50: true }, the
// lowest version is chrome70, not chrome50.
let lowest = null;
for (const version of reportedVersions) {
if (!version.implements) {
break;
}
lowest = version;
}
return lowest;
});
const envFiltered = envTests.filter(t => t);
if (envTests.length > envFiltered.length || envTests.length === 0) {
// envTests.forEach((test, i) => {
// if (!test) {
// // print unsupported features
// if (env === 'node') {
// console.log(`ENV(${env}): ${tests[i].name}`);
// }
// }
// });
return null;
}
return envFiltered.reduce((a, b) => {
if (
a.semver === unreleasedLabelForEnv ||
b.semver === unreleasedLabelForEnv
) {
return unreleasedLabelForEnv;
}
return semver.lt(a.semver, b.semver) ? b : a;
});
};
const generateData = (environments, features) => {
return mapValues(features, options => {
if (!options.features) {
options = {
features: [options],
};
}
const plugin = {};
environments.forEach(env => {
const version = getLowestImplementedVersion(options, env);
if (version !== null) {
const versionString = version.version;
// NOTE(bng): A number of environments in compat-table changed to
// include a trailing zero (node10 -> node10_0), so for now stripping
// it to be consistent
plugin[env] = versionString.endsWith(".0")
? versionString.slice(0, -2)
: versionString;
}
});
if (plugin.chrome) {
// add opera
if (plugin.chrome >= 28) {
plugin.opera = (plugin.chrome - 13).toString();
} else if (plugin.chrome === 5) {
plugin.opera = "12";
}
// add electron
const electronVersion = chromiumToElectron(plugin.chrome);
if (electronVersion) {
plugin.electron = electronVersion.toString();
}
}
return plugin;
});
};
for (const target of ["plugin", "corejs2-built-in"]) {
const newData = generateData(
environments,
require(`./data/${target}-features`)
);
const dataPath = path.join(__dirname, `../data/${target}s.json`);
const stringified = JSON.stringify(newData, null, 2) + "\n";
if (process.env.CHECK_COMPAT_DATA) {
const currentData = fs.readFileSync(dataPath, "utf8");
// Compare as JSON strings to also check keys ordering
if (currentData !== stringified) {
console.error(
"The newly generated plugin/built-in data does not match the current " +
"files. Re-run `make build-compat-data`."
);
process.exitCode = 1;
break;
}
} else {
fs.writeFileSync(dataPath, stringified);
}
}