forked from mirrors/gecko-dev
65 lines
1.8 KiB
JavaScript
65 lines
1.8 KiB
JavaScript
/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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import { Subprocess } from "resource://gre/modules/Subprocess.sys.mjs";
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export async function runBackgroundTask(commandLine) {
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let sentinel = commandLine.getArgument(0);
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let count =
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commandLine.length > 1
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? Number.parseInt(commandLine.getArgument(1), 10)
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: 1;
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let main = await ChromeUtils.requestProcInfo();
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let info = [main.pid, Services.dirsvc.get("ProfD", Ci.nsIFile).path];
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// `dump` prints to the console without formatting.
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dump(`${count}: ${sentinel}${JSON.stringify(info)}${sentinel}\n`);
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// Maybe launch a child.
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if (count <= 1) {
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return 0;
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}
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let command = Services.dirsvc.get("XREExeF", Ci.nsIFile).path;
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let args = [
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"--backgroundtask",
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"unique_profile",
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sentinel,
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(count - 1).toString(),
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];
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// We must assemble all of the string fragments from stdout.
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let stdoutChunks = [];
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let proc = await Subprocess.call({
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command,
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arguments: args,
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stderr: "stdout",
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// Don't inherit this task's profile path.
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environmentAppend: true,
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environment: { XRE_PROFILE_PATH: null },
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}).then(p => {
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p.stdin.close();
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const dumpPipe = async pipe => {
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let data = await pipe.readString();
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while (data) {
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data = await pipe.readString();
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stdoutChunks.push(data);
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}
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};
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dumpPipe(p.stdout);
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return p;
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});
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let { exitCode } = await proc.wait();
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let stdout = stdoutChunks.join("");
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for (let line of stdout.split(/\r\n|\r|\n/).slice(0, -1)) {
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dump(`${count}> ${line}\n`);
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}
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return exitCode;
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}
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