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43 lines
1.0 KiB
JavaScript
43 lines
1.0 KiB
JavaScript
"use strict";
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const memoizee = require("memoizee");
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const fs = require("fs").promises;
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const unreachable = require("@joepie91/unreachable")("cvm");
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const lsblk = require("../exec-lsblk");
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const All = require("../graphql-interface/symbols/all");
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const treeFind = require("../tree-find");
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const treeMapAsync = require("../tree-map-async");
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function makePredicate({ path, name }) {
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if (path != null) {
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return (device) => device.path === path;
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} else if (name != null) {
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return (device) => device.name === name;
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} else {
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unreachable("No selector specified for lsblk");
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}
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}
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module.exports = function () {
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let lsblkOnce = memoizee(async () => {
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return treeMapAsync(await lsblk(), async (device) => {
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return {
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... device,
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path: await fs.realpath(device.path)
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};
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});
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});
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return async function (selectors) {
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let blockDeviceTree = await lsblkOnce();
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return selectors.map((selector) => {
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if (selector === All) {
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return blockDeviceTree;
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} else {
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return treeFind(blockDeviceTree, makePredicate(selector));
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}
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});
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};
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};
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