London | 25-SDC-Nov | Aida Eslamimoghadam | Sprint 3 | Implement Shell Tools

implement-shell-tools/cat/myCat.js

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+import { program } from "commander";
+import { promises as fs } from "node:fs";
+import process from "node:process";
+
+program
+  .name("myCat")
+  .description("Simple file viewer")
+  .option("-n", "Number all output lines")
+  .option("-b", "Number non-blank output lines")
+  .argument("<path...>", "One or more file paths to show");
+
+program.parse();
+
+const files = program.args;
+const opts = program.opts();
+let lineNumber = 1;
+
+for (const filename of files) {
+  const content = await fs.readFile(filename, "utf-8");
+
+  if (opts.n) {
+    const lines = content.split("\n");
+
+    for (const line of lines) {
+      console.log(lineNumber + " " + line);
+      lineNumber++;
+    }
+  } else if (opts.b) {
+    const lines = content.split("\n");
+
+    for (const line of lines) {
+      if (line.trim() !== "") {
+        console.log(lineNumber + " " + line);
+        lineNumber++;
+      }
+    }
+  } else {
+    console.log(content);
+  }
+}

implement-shell-tools/ls/myLs.js

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+import { program } from "commander";
+import { promises as fs } from "node:fs";
+import process from "node:process";
+
+program
+  .name("myLs")
+  .description("my ls clone")
+  .option("-1", "one entry per line")
+  .option("-a", "show hidden files")
+  .argument("[paths...]", "file or directory paths");
+
+program.parse();
+
+const opts = program.opts();
+let paths = program.args;
+
+if (paths.length === 0) {
+  paths = ["."];
+}
+
+for (const path of paths) {
+  const entries = await fs.readdir(path);
+
+  for (const file of entries) {
+    if (!opts.a && file.startsWith(".")) {
+      continue;
+    }
+
+    if (opts["1"]) {
+      console.log(file);
+    } else {
+      console.log(file + " ");
+    }
+  }
+
+}

implement-shell-tools/package.json

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+{
+  "type": "module",
+  "dependencies": {
+    "commander": "^14.0.2"
+  }
+}

implement-shell-tools/wc/MyWc.js

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+import { program } from "commander";
+import { promises as fs } from "node:fs";
+import process from "node:process";
+
+program
+  .name("myLs")
+  .description("my ls clone")
+  .option("-l", "line count")
+  .option("-w", "words count")
+  .option("-c", "character count")
+  .option("-s", "character count without spaces")
+  .argument("[paths...]", "file or directory paths");
+
+program.parse();
+
+const opts = program.opts();
+let files = program.args;
+
+if (files.length === 0) {
+  files = ["."];
+}
+
+let totalLines = 0;
+let totalWords = 0;
+
+if (opts.l) {
+  for (const file of files) {
+    const content = await fs.readFile(file, "utf-8");
+    console.log(content);
+    const lineCount = content.split("\n").length;
+
+    totalLines += lineCount;
+  }
+  console.log("Lines:", totalLines);
+}
+if (opts.w) {
+  for (const file of files) {
+    const content = await fs.readFile(file, "utf-8");
+    console.log(content);
+
+    const wordCount = content.trim().split(/\s+/).length;
+    totalWords += wordCount;
+  }
+  console.log("Total words:", totalWords);
+}
+if (opts.c) {
+  let totalChars = 0;
+  for (const file of files) {
+    const content = await fs.readFile(file, "utf-8");
+
+    totalChars += content.trim().length;
+    // const charList = content.trim().split(/\s+/);
+    // for (const char of charList) {
+    //   totalChars += char.length;
+    // }
+  }
+  console.log("Total characters:", totalChars);
+}
+
+if (opts.s) {
+  let totalCharsNoSpaces = 0;
+  for (const file of files) {
+    const content = await fs.readFile(file, "utf-8");
+    const withoutSpaces = content.replace(/\s/g, "");
+    totalCharsNoSpaces += withoutSpaces.length;
+  }
+  console.log("Total characters without spaces:", totalCharsNoSpaces);
+}