| 1 | /**
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| 2 | * Declares all globals with a var and assigns the global object. Thus you're able to
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| 3 | * override globals without changing the global object itself.
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| 4 | *
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| 5 | * Returns something like
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| 6 | * "var console = global.console; var process = global.process; ..."
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| 7 | *
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| 8 | * @return {String}
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| 9 | */
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| 10 | function getImportGlobalsSrc(ignore) {
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| 11 | var key,
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| 12 | value,
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| 13 | src = "",
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| 14 | globalObj = typeof global === "undefined"? window: global;
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| 15 |
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| 16 | ignore = ignore || [];
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| 17 | // global itself can't be overridden because it's the only reference to our real global objects
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| 18 | ignore.push("global");
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| 19 | // ignore 'module', 'exports' and 'require' on the global scope, because otherwise our code would
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| 20 | // shadow the module-internal variables
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| 21 | // @see https://github.com/jhnns/rewire-webpack/pull/6
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| 22 | ignore.push("module", "exports", "require");
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| 23 |
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| 24 | for (key in globalObj) { /* jshint forin: false */
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| 25 | if (ignore.indexOf(key) !== -1) {
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| 26 | continue;
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| 27 | }
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| 28 | value = globalObj[key];
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| 29 |
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| 30 | // key may be an invalid variable name (e.g. 'a-b')
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| 31 | try {
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| 32 | eval("var " + key + ";");
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| 33 | src += "var " + key + " = global." + key + "; ";
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| 34 | } catch(e) {}
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| 35 | }
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| 36 |
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| 37 | return src;
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| 38 | }
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| 39 |
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| 40 | module.exports = getImportGlobalsSrc;
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