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import * as path from "@std/path";
import { generateTimeStringForFileName } from "./base.ts";
export class Logger {
constructor(public readonly path: string) {}
warn(message: string) {
console.log(message);
}
generateLogFilePath(
prefix: string = "",
suffix: string = "",
instant?: Temporal.Instant | Date,
): string {
return path.join(
this.path,
`${prefix}-${generateTimeStringForFileName(instant)}-${suffix}`,
);
}
openLogFile(
prefix: string = "",
suffix: string = "",
instant?: Temporal.Instant | Date,
): Promise<Deno.FsFile> {
const logPath = this.generateLogFilePath(prefix, suffix, instant);
return Deno.open(logPath, {
read: false,
write: true,
append: true,
create: true,
});
}
async logProgramOutput(
process: Deno.ChildProcess,
program: string,
instant?: Temporal.Instant | Date,
): Promise<void> {
const stdoutFile = await this.openLogFile(program, "stdout", instant);
const stderrFile = await this.openLogFile(program, "stderr", instant);
process.stdout.pipeTo(stdoutFile.writable);
process.stderr.pipeTo(stderrFile.writable);
}
}
let _logger: Logger | null = null;
export function getLogger(): Logger {
if (_logger == null) {
throw new Error("No logger is set now.");
}
return _logger;
}
export function setLogger(logger: Logger | null) {
_logger = logger;
}
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