aws-cdk
Version:
CDK Toolkit, the command line tool for CDK apps
43 lines • 4.44 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.contentHash = contentHash;
exports.contentHashAny = contentHashAny;
const crypto = require("crypto");
function contentHash(data) {
return crypto.createHash('sha256').update(data).digest('hex');
}
/**
* A stably sorted hash of an arbitrary JS object
*/
function contentHashAny(value) {
const ret = crypto.createHash('sha256');
recurse(value);
return ret.digest('hex');
function recurse(x) {
if (typeof x === 'string') {
ret.update(x);
return;
}
if (Array.isArray(x)) {
ret.update('[');
for (const e of x) {
recurse(e);
ret.update('||');
}
ret.update(']');
return;
}
if (x && typeof x === 'object') {
ret.update('{');
for (const key of Object.keys(x).sort()) {
ret.update(key);
ret.update(':');
recurse(x[key]);
}
ret.update('}');
return;
}
ret.update(`${x}${typeof x}`); // typeof to make sure hash('123') !== hash(123)
}
}
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