command to compare two file

Signed-off-by: rahul <rcsofttech85@gmail.com>

Signed-off-by: rahul <rcsofttech85@gmail.com>

Author: rcsofttech85

bin/file-diff

@@ -0,0 +1,77 @@
+#!/usr/bin/env php
+<?php
+
+require 'vendor/autoload.php';
+
+
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\SingleCommandApplication;
+use Symfony\Component\Console\Style\SymfonyStyle;
+
+
+$command = (new SingleCommandApplication(name: 'file-diff'))
+    ->addArgument('oldFile', InputArgument::REQUIRED, 'old file name')
+    ->addArgument('newFile', InputArgument::REQUIRED, 'new file name')
+    ->setCode(function (InputInterface $input, OutputInterface $output): int {
+        $io = new SymfonyStyle($input, $output);
+        $oldFile = $input->getArgument('oldFile');
+        $newFile = $input->getArgument("newFile");
+
+        if (!file_exists($oldFile) || !file_exists($newFile)) {
+            $io->error("file does not exists");
+            return Command::FAILURE;
+        }
+
+        fileDiff($oldFile, $newFile);
+        return Command::SUCCESS;
+    })->run();
+
+
+function fileDiff($oldFilePath, $newFilePath)
+{
+    $oldLines = file($oldFilePath, FILE_IGNORE_NEW_LINES);
+    $newLines = file($newFilePath, FILE_IGNORE_NEW_LINES);
+
+
+    $oldLineCount = count($oldLines);
+    $newLineCount = count($newLines);
+
+
+    $maxLineCount = max($oldLineCount, $newLineCount);
+
+    $changes = [];
+    for ($i = 0; $i < $maxLineCount; $i++) {
+        $oldLine = $i < $oldLineCount ? $oldLines[$i] : null;
+        $newLine = $i < $newLineCount ? $newLines[$i] : null;
+
+        if ($oldLine === $newLine) {
+            continue;
+        }
+
+        $colorGreen = "\e[32m";
+        $colorRed = "\e[31m";
+        $colorReset = "\e[0m";
+
+
+        $oldLineNumber = $i + 1;
+        $newLineNumber = $i + 1;
+
+
+        $changes[] = ($oldLine === null ? "$colorGreen+ New (Line $newLineNumber): " : "$colorRed- Old (Line $oldLineNumber): ") . ($oldLine ?? $newLine) . "$colorReset";
+
+        if ($oldLine !== null && $newLine !== null) {
+            $changes[] = "$colorGreen+ New (Line $newLineNumber): " . $newLine . "$colorReset";
+        }
+    }
+
+
+    $console = fopen("php://stdout", "w");
+    foreach ($changes as $change) {
+        fwrite($console, $change . PHP_EOL);
+    }
+
+    fclose($console);
+}

composer.json

@@ -20,11 +20,15 @@
     "ext-sodium": "*",
     "ext-ctype": "*",
     "ext-zip": "*",
-    "ext-fileinfo": "*"
+    "ext-fileinfo": "*",
+    "symfony/console": "^6.3"
   },
   "require-dev": {
     "phpunit/phpunit": "^10",
     "squizlabs/php_codesniffer": "^3.7",
     "symfony/dotenv": "^6.3"
-  }
+  },
+  "bin": [
+    "bin/file-diff"
+  ]
 }

composer.lock

@@ -0,0 +1,84 @@
+<?php
+
+namespace Integration;
+
+use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\Attributes\Test;
+use PHPUnit\Framework\TestCase;
+
+class FileDiffCommandTest extends TestCase
+{
+    public static function tearDownAfterClass(): void
+    {
+        parent::tearDownAfterClass();
+
+        unlink('new');
+        unlink('old');
+    }
+
+    public static function commandArgumentProvider(): iterable
+    {
+        file_put_contents("old", "this is old file" . PHP_EOL, FILE_APPEND);
+        file_put_contents("new", "this is new file" . PHP_EOL, FILE_APPEND);
+
+        file_put_contents("old", "this line has some difference" . PHP_EOL, FILE_APPEND);
+        file_put_contents("new", "this line has same old code" . PHP_EOL, FILE_APPEND);
+
+
+        yield ['old', 'new', 'Old (Line 1):'];
+        yield ['old', 'new', 'Old (Line 2):'];
+    }
+
+    public static function matchingDataProvider(): iterable
+    {
+        file_put_contents("old", "this has matching content" . PHP_EOL, FILE_APPEND);
+        file_put_contents("new", "this has matching content" . PHP_EOL, FILE_APPEND);
+
+
+        yield ['old', 'new', 'Old (Line 3):'];
+    }
+
+    #[Test]
+    #[DataProvider('commandArgumentProvider')]
+    public function fileDiffShowsCorrectChanges(string $oldFile, string $newFile, string $expected)
+    {
+        $command = "php bin/file-diff $oldFile $newFile";
+        exec($command, $output, $exitCode);
+
+        $actualOutput = implode("\n", $output);
+
+        $this->assertStringContainsString($expected, $actualOutput);
+
+
+        $this->assertEquals(0, $exitCode);
+    }
+
+    #[Test]
+    public function throwsExceptionIfArgumentIsNotValidFile()
+    {
+        $command = "php bin/file-diff unknown unknown";
+        exec($command, $output, $exitCode);
+
+        $actualOutput = implode("\n", $output);
+        $expectedOutput = "file does not exists";
+
+
+        $this->assertSame(1, $exitCode);
+        $this->assertStringContainsString($expectedOutput, $actualOutput);
+    }
+
+    #[Test]
+    #[DataProvider('matchingDataProvider')]
+    public function sameContentShouldNotBeDisplayedInTheResult(string $oldFile, string $newFile, string $expected)
+    {
+        $command = "php bin/file-diff $oldFile $newFile";
+        exec($command, $output, $exitCode);
+
+        $actualOutput = implode("\n", $output);
+
+        $expected = "Old (Line 3)";
+
+        $this->assertStringNotContainsString($expected, $actualOutput);
+        $this->assertEquals(0, $exitCode);
+    }
+}

tests/Integration/FileDiffCommandTest.php

@@ -59,6 +59,4 @@ public static function wrongStreamDataProvider(): iterable
     {
         yield ["output.html", "https://gist.github"];
     }
-
-
 }