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