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feat: redirect process stdio to file (#2554)

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Bartek Iwańczuk 2019-06-22 01:00:14 +02:00 • committed by Ryan Dahl
parent eb93dc58a1
commit 642eaf97c6
6 changed files with 189 additions and 58 deletions
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54
js/process.ts
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@ -28,9 +28,9 @@ export interface RunOptions {
args: string[];
cwd?: string;
env?: { [key: string]: string };
stdout?: ProcessStdio;
stderr?: ProcessStdio;
stdin?: ProcessStdio;
stdout?: ProcessStdio | number;
stderr?: ProcessStdio | number;
stdin?: ProcessStdio | number;
}
async function runStatus(rid: number): Promise<ProcessStatus> {
@ -149,6 +149,10 @@ function stdioMap(s: ProcessStdio): msg.ProcessStdio {
}
}
function isRid(arg: unknown): arg is number {
return !isNaN(arg as number);
}
/**
* Spawns new subprocess.
*
@ -159,7 +163,8 @@ function stdioMap(s: ProcessStdio): msg.ProcessStdio {
* mapping.
*
* By default subprocess inherits stdio of parent process. To change that
* `opt.stdout`, `opt.stderr` and `opt.stdin` can be specified independently.
* `opt.stdout`, `opt.stderr` and `opt.stdin` can be specified independently -
* they can be set to either `ProcessStdio` or `rid` of open file.
*/
export function run(opt: RunOptions): Process {
const builder = flatbuffers.createBuilder();
@ -177,14 +182,49 @@ export function run(opt: RunOptions): Process {
}
}
const envOffset = msg.Run.createEnvVector(builder, kvOffset);
let stdInOffset = stdioMap("inherit");
let stdOutOffset = stdioMap("inherit");
let stdErrOffset = stdioMap("inherit");
let stdinRidOffset = 0;
let stdoutRidOffset = 0;
let stderrRidOffset = 0;
if (opt.stdin) {
if (isRid(opt.stdin)) {
stdinRidOffset = opt.stdin;
} else {
stdInOffset = stdioMap(opt.stdin);
}
}
if (opt.stdout) {
if (isRid(opt.stdout)) {
stdoutRidOffset = opt.stdout;
} else {
stdOutOffset = stdioMap(opt.stdout);
}
}
if (opt.stderr) {
if (isRid(opt.stderr)) {
stderrRidOffset = opt.stderr;
} else {
stdErrOffset = stdioMap(opt.stderr);
}
}
const inner = msg.Run.createRun(
builder,
argsOffset,
cwdOffset,
envOffset,
opt.stdin ? stdioMap(opt.stdin) : stdioMap("inherit"),
opt.stdout ? stdioMap(opt.stdout) : stdioMap("inherit"),
opt.stderr ? stdioMap(opt.stderr) : stdioMap("inherit")
stdInOffset,
stdOutOffset,
stdErrOffset,
stdinRidOffset,
stdoutRidOffset,
stderrRidOffset
);
const baseRes = dispatch.sendSync(builder, msg.Any.Run, inner);
assert(baseRes != null);