Added a Diff Utility Program in the projects directory.

docs/README.md

@@ -105,3 +105,4 @@ SR No   | Project | Author
 98 | [PNG to ICO converter](https://github.com/chavarera/python-mini-projects/tree/master/projects/convert_png_images_to_ico_format)| [weicheansoo](https://github.com/weicheansoo)
 99 | [Find IMDB Ratings](https://github.com/chavarera/python-mini-projects/tree/master/projects/Find_imdb_rating)| [Utkarsh Bajaj](https://github.com/utkarshbajaj)
 100 | [Terminal Based Hangman Game](https://github.com/chavarera/python-mini-projects/tree/master/projects/Terminal_Based_Hangman_Game)| [neohboonyee99](https://github.com/neohboonyee99)
+101 | [Diff Utility](https://github.com/Python-World/python-mini-projects/tree/master/projects/Diff_Util)| [KILLinefficiency](https://github.com/KILLinefficiency)

projects/Diff_Util/README.md

@@ -0,0 +1,62 @@
+# Diff Utility
+
+This program is a minimal clone of the UNIX ``diff`` program.
+
+``diff.py`` takes two file names as command-line arguments and compares them for changes.
+
+## Prerequisites
+* Rich: ``rich==10.11.0``
+
+## How to run the script
+**Running on Windows:**
+
+```
+python diff.py <orignal_file> <changed_file>
+```
+
+**Running on Linux / macOS:**
+
+```
+./diff.py <orignal_file> <changed_file>
+```
+
+## Usage Example
+
+Consider two files ``v1`` and ``v2``:
+
+**v1**:
+```
+Bruce
+Alfred
+Jason
+```
+
+**v2**:
+```
+Batman
+Alfred
+Red Hood
+Joker
+Ra's Al Ghul
+```
+
+On running ``./diff.py v1 v2``, you'll get the following output:
+```
+
+[-] Line 1: Bruce
+[+] Line 1: Batman
+
+[-] Line 3: Jason
+[+] Line 3: Red Hood
+
+[+] Line 4: Joker
+
+[+] Line 5: Ra's Al Ghul
+
+```
+
+## Screenshot
+![Python Diff Utility](diff_util.jpg)
+
+# KILLinefficiency
+Github Link: [KILLinefficiency](https://www.github.com/KILLinefficiency)

projects/Diff_Util/diff.py

@@ -0,0 +1,48 @@
+#!/usr/bin/env python3
+
+# sys: for reading command-line arguments.
+# rich: for coloring the text.
+import sys
+from rich import print
+
+# Print Usage message if enough arguments are not passed.
+if len(sys.argv) < 3:
+    print("Usage:")
+    print("\tMust provide two file names as command-line arguments.")
+    print("\tdiff.py <orignal_file> <changed_file>")
+    exit(1)
+
+orignal = sys.argv[1]
+changed = sys.argv[2]
+
+# Read the contents of the files in lists.
+orignal_contents = open(orignal, "r").readlines()
+changed_contents = open(changed, "r").readlines()
+
+color = "green"
+symbol = f"[bold {color}][+]"
+
+print()
+
+# Determine which file has changed much.
+if len(changed_contents) <= len(orignal_contents):
+    color = "red"
+    symbol = f"[bold {color}][-]"
+    smallest_sloc, largest_sloc = changed_contents, orignal_contents
+else:
+    smallest_sloc, largest_sloc = orignal_contents, changed_contents
+
+# Go over all the lines to check the changes.
+for line in range(0, len(smallest_sloc)):
+    if orignal_contents[line] == changed_contents[line]:
+        # Ignore if the lines are same.
+        continue
+    else:
+        # Display the changes on the respective lines of the files.
+        print(f"[bold red][-] Line {line + 1}:[/bold red] {orignal_contents[line]}", end = "")
+        print(f"[bold green][+] Line {line + 1}:[/bold green] {changed_contents[line]}")
+
+        # Show the additions [+] or deletions [-] for the file that is the largest.
+        if line == len(smallest_sloc) - 1:
+            for new_line in range(line + 1, len(largest_sloc)):
+                print(f"{symbol} Line {new_line + 1}:[/bold {color}] {largest_sloc[new_line]}")

projects/Diff_Util/requirements.txt

@@ -0,0 +1 @@
+rich==10.11.0