82f2b76e25
We now use webpack instead of SystemJS, effectively bundling modules into one file (plus commons chunks) for every entry point. This results in a much smaller extension size (almost half). Furthermore we use yarn/npm even for extension run-time dependencies. This relieves us from manually vendoring and building dependencies. It's also easier to understand for new developers familiar with node.
66 lines
1.5 KiB
JavaScript
66 lines
1.5 KiB
JavaScript
'use strict';
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var jsTokens = require('js-tokens').default;
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var processEnvRe = /\bprocess\.env\.[_$a-zA-Z][$\w]+\b/;
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var spaceOrCommentRe = /^(?:\s|\/[/*])/;
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function replace(src, envs) {
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if (!processEnvRe.test(src)) {
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return src;
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}
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var out = [];
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var purge = envs.some(function(env) {
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return env._ && env._.indexOf('purge') !== -1;
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});
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jsTokens.lastIndex = 0
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var parts = src.match(jsTokens);
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for (var i = 0; i < parts.length; i++) {
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if (parts[i ] === 'process' &&
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parts[i + 1] === '.' &&
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parts[i + 2] === 'env' &&
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parts[i + 3] === '.') {
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var prevCodeToken = getAdjacentCodeToken(-1, parts, i);
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var nextCodeToken = getAdjacentCodeToken(1, parts, i + 4);
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var replacement = getReplacementString(envs, parts[i + 4], purge);
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if (prevCodeToken !== '.' &&
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nextCodeToken !== '.' &&
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nextCodeToken !== '=' &&
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typeof replacement === 'string') {
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out.push(replacement);
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i += 4;
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continue;
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}
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}
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out.push(parts[i]);
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}
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return out.join('');
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}
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function getAdjacentCodeToken(dir, parts, i) {
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while (true) {
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var part = parts[i += dir];
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if (!spaceOrCommentRe.test(part)) {
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return part;
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}
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}
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}
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function getReplacementString(envs, name, purge) {
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for (var j = 0; j < envs.length; j++) {
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var env = envs[j];
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if (typeof env[name] !== 'undefined') {
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return JSON.stringify(env[name]);
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}
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}
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if (purge) {
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return 'undefined';
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}
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}
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module.exports = replace;
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