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import {
Either,
type IEither,
type ITraceable,
LogLevel,
TraceUtil,
} from "@emprespresso/pengueno";
type Command = string[] | string;
type CommandOutputDecoded = {
code: number;
stdoutText: string;
stderrText: string;
};
export class ProcessError extends Error {}
export const getStdout = (
c: ITraceable<Command>,
options: Deno.CommandOptions = {},
): Promise<IEither<ProcessError, string>> =>
c.bimap(TraceUtil.withFunctionTrace(getStdout))
.map(({ item: cmd, trace }) => {
trace.trace(`:> im gonna run this command! ${cmd}`);
const [exec, ...args] = (typeof cmd === "string") ? cmd.split(" ") : cmd;
return new Deno.Command(exec, {
args,
stdout: "piped",
stderr: "piped",
...options,
}).output();
})
.map(({ item: p }) =>
Either.fromFailableAsync<Error, Deno.CommandOutput>(p)
)
.map(
TraceUtil.promiseify(({ item: eitherOutput, trace }) =>
eitherOutput.flatMap(({ code, stderr, stdout }) =>
Either
.fromFailable<Error, CommandOutputDecoded>(() => {
const stdoutText = new TextDecoder().decode(stdout);
const stderrText = new TextDecoder().decode(stderr);
return { code, stdoutText, stderrText };
})
.mapLeft((e) => {
trace.addTrace(LogLevel.ERROR).trace(`o.o wat ${e}`);
return new ProcessError(`${e}`);
})
.flatMap((decodedOutput): Either<ProcessError, string> => {
const { code, stdoutText, stderrText } = decodedOutput;
trace.addTrace(LogLevel.DEBUG).trace(
`stderr hehehe ${stderrText}`,
);
if (code !== 0) {
const msg =
`i weceived an exit code of ${code} i wanna zewoooo :<`;
trace.addTrace(LogLevel.ERROR).trace(msg);
return Either.left(new ProcessError(msg));
}
return Either.right(stdoutText);
})
)
),
).item;
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