feat(cat): new command

README.md

@@ -32,7 +32,7 @@ count below and mark it as done in this README.md. Thanks!
 
 Commit message should follow [conventional commits](https://www.conventionalcommits.org/)
 
-## Completed (6/109)
+## Completed (8/109)
 
 |  Done   | Cmd       | Descripton                                       |
 | :-----: | --------- | ------------------------------------------------ |
@@ -43,7 +43,7 @@ Commit message should follow [conventional commits](https://www.conventionalcomm
 |         | base64    | Transform data into printable data               |
 |         | basename  | Strip directory and suffix from a file name      |
 |         | basenc    | Transform data into printable data               |
-|         | cat       | Concatenate and write files                      |
+| ✓ | cat       | Concatenate and write files                      |
 |         | chcon     | Change SELinux context of file                   |
 |         | chgrp     | Change group ownership                           |
 |         | chmod     | Change access permissions                        |
@@ -141,7 +141,7 @@ Commit message should follow [conventional commits](https://www.conventionalcomm
 |         | uptime    | Print system uptime and load                     |
 |         | users     | Print login names of users currently logged in   |
 |         | vdir      | Verbosely list directory contents                |
-|         | wc        | Print newline, word, and byte counts             |
+| ✓ | wc        | Print newline, word, and byte counts             |
 |         | who       | Print who is currently logged in                 |
 |         | whoami    | Print effective user ID                          |
 | ✓ | yes       | Print a string until interrupted                 |

src/cat/README.md

@@ -0,0 +1,25 @@
+# cat
+
+## specification
+
+The Open Group Base Specifications Issue 8
+IEEE Std 1003.1-2024
+Copyright © 2001-2024 The IEEE and The Open Group
+
+<https://pubs.opengroup.org/onlinepubs/9799919799/utilities/cat.html>
+
+```txt
+cat [-u] [file...]
+
+The cat utility shall conform to XBD 12.2 Utility Syntax Guidelines .
+
+The following option shall be supported:
+
+-u
+    Write bytes from the input file to the standard output without delay as each is read.
+
+file
+    A pathname of an input file. If no file operands are specified, the standard input shall be used. If a file is '-', the cat utility shall read from the standard input at that point in the sequence. The cat utility shall not close and reopen standard input when it is referenced in this way, but shall accept multiple occurrences of '-' as a file operand.
+
+The standard input shall be used only if no file operands are specified, or if a file operand is '-'. See the INPUT FILES section.
+```

src/cat/main.mbt

@@ -0,0 +1,61 @@
+struct CatOption {
+  unbuffered: Bool
+  files: Array[String]
+} 
+// Parse command line arguments to extract -u flag and files
+fn parse_args(args: Array[String]) -> CatOption {
+  let mut unbuffered = false
+  let files: Array[String] = []
+  let mut i = 0 // Skip program name
+
+  while i < args.length() {
+    let arg = args[i]
+    if arg == "-u" {
+      unbuffered = true
+    } else {
+      files.push(arg)
+    }
+    i = i + 1
+  }
+
+  return {unbuffered, files}
+}
+
+// Read from file and write to stdout
+fn cat_file!(path~: String) -> Unit {
+  let file_content = @fs.read_file_to_string!(path = path)
+  let file_lines = file_content.split("\n").to_array()
+  for line in file_lines{
+    println(line)
+  }
+}
+
+fn main {
+  let args = @sys.get_cli_args()
+
+  let catOption = parse_args(args)
+
+  // Set unbuffered mode if requested
+  if catOption.unbuffered {
+    println("Unbuffered not supported yet")
+    return
+  }
+
+  // If no files specified, read from stdin
+  if catOption.files.length() == 0 {
+    println("Reading from stdin not supported yet")
+    return
+  }
+
+  // Process each file
+  for file in catOption.files {
+    match @fs.is_file?(path=file){
+      Ok(true) => {
+        let _ = cat_file?(path=file)  
+      }
+      _ => {
+        println("File not found: " + file)  
+      } 
+    }
+  }
+}

src/cat/moon.pkg.json

@@ -0,0 +1,7 @@
+{
+    "is-main": true,
+    "import": [
+     "moonbitlang/x/sys",
+     "moonbitlang/x/fs"
+    ]
+  }

tests/cat.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+set -e
+
+cat README.md