Update simple method of getting all 'touched file paths'

Author: plotbox-io

README.md

@@ -10,6 +10,13 @@ when dealing with legacy code-bases where you want to tackle code smells bit by
 
 ### Example Usage
 
+#### Get all 'files touched' in current feature branch
+
+```
+$gitService = new GitInfoService();
+$touchedFiles = $gitService->filesTouched('/path/to/some/repo');
+```
+
 #### Filter issues by 'lines touched' in current branch 
 
 The logic will consider files added, and modified (unstaged, staged, comitted), 

src/GitInfoService.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace PlotBox\PhpGitOps;
+
+use PlotBox\PhpGitOps\Git\BranchComparer;
+use PlotBox\PhpGitOps\Git\BranchModificationsFactory;
+use PlotBox\PhpGitOps\Git\Git;
+
+class GitInfoService
+{
+    /**
+     * Convenience wrapper to find all filepaths that have been touched in
+     * currently active feature branch
+     *
+     * @param $repoDirectory
+     * @return RelativeFile[]
+     */
+    public function filesTouched($repoDirectory)
+    {
+        // Get all files 'touched' in current branch
+        $git = new Git($repoDirectory);
+        $branchModificationFactory = new BranchModificationsFactory($git);
+        $branchComparer = new BranchComparer($git);
+        $currentBranch = $git->getCurrentBranch();
+        $ancestorBranch = $branchComparer->getAncestorBranch($currentBranch);
+        $branchModifications = $branchModificationFactory->getBranchModifications(
+            $git->getMergeBase($ancestorBranch, $currentBranch),
+            $git->getLatestCommit($currentBranch)
+        );
+        return $branchModifications->getModifiedFilePaths();
+    }
+}