|
| 1 | +import { program } from "commander"; |
| 2 | +import { promises as fs } from "node:fs"; |
| 3 | + |
| 4 | +program |
| 5 | + .name("node-cat") |
| 6 | + .description("A Node.js implementation of the Unix cat command") |
| 7 | + .option("-n, --number", "Number all output lines") |
| 8 | + .option( |
| 9 | + "-b, --numberNonBlank", |
| 10 | + "Numbers only non-empty lines. Overrides -n option" |
| 11 | + ) |
| 12 | + .argument("<path...>", "The file path to process"); |
| 13 | + |
| 14 | +program.parse(); |
| 15 | + |
| 16 | +const paths = program.args; |
| 17 | +const { number, numberNonBlank } = program.opts(); |
| 18 | + |
| 19 | +// --- Read files and sizes --- |
| 20 | +let content = ""; |
| 21 | +let fileSize; |
| 22 | + |
| 23 | +for (const path of paths) { |
| 24 | + content = await fs.readFile(path, "utf-8"); |
| 25 | + if (content.endsWith("\n")) { |
| 26 | + content = content.slice(0, -1); |
| 27 | + } |
| 28 | + fileSize = await fs.stat(path); |
| 29 | + console.log( |
| 30 | + getLineCount(content), |
| 31 | + getWordCount(content), |
| 32 | + fileSize.size, |
| 33 | + path |
| 34 | + ); |
| 35 | +} |
| 36 | + |
| 37 | +function getWordCount(text) { |
| 38 | + let words, lines; |
| 39 | + |
| 40 | + lines = text.split("\n"); |
| 41 | + // console.log(lines); |
| 42 | + words = lines.flatMap((line) => line.split(" ")); |
| 43 | + |
| 44 | + return words.filter((word) => word.length > 0).length; |
| 45 | +} |
| 46 | + |
| 47 | +function getLineCount(text) { |
| 48 | + let lines; |
| 49 | + return (lines = text.split("\n").length); |
| 50 | +} |
| 51 | + |
| 52 | +// 1 4 20 sample-files/1.txt |
| 53 | +// 1 7 39 sample-files/2.txt |
| 54 | +// 5 24 125 sample-files/3.txt |
| 55 | +// 7 35 184 total |
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