Archive files between 2 commits on Git repository

git_diff

#!/usr/bin/env php
<?php
if( isset( $argv[1] ) && preg_match('/(-{1,2})?help$/', $argv[1] ) ) {
	echo <<<'TXT'
/**
 * Archive git diff file between specified commit
 *
 * git_diff ./archive 29879823c HEAD
 *
 * Enter above, diff between HEAD and 29879823c will be arvhived to `./archive`.
 *
 * [How to install]
 * 
 * 
 * @param string $path Output folder's path.
 * @param string $hash Target commit's hash.
 * @param string $from_hash Origin commit's hash. HEAD if not specified.
 */

TXT;
	exit;
}


/**
 * Echo
 *
 * @param string $string
 * @param int $lf Number of line feed
 */
function e($string, $lf = 1){
	echo $string.implode('', array_map(function($var){
		return PHP_EOL;
	}, range(0, max(1, $lf) - 1)));
}


/**
 * Die
 *
 * @param $string
 */
function d($sring){
	echo $sring.PHP_EOL;
	exit;
}

//
// Start processing
//
//
echo <<<TXT

< This is an Git diff tool! >
 ---------------------------
        \   ^__^
         \  (oo)\_______
            (__)\       )\/\
                ||----w |
                ||     ||




TXT;


foreach( [
	1 => 'Target path is not specified.',
    2 => 'Target commit is not specified.',
] as $index => $msg){
	if( !isset($argv[$index]) ){
		d('[ERROR] '.$msg);
	}
}

$from = isset($argv[3]) ? $argv[3] : 'HEAD';

$to = $argv[2];

$out = $argv[1];

$cur_dir = getcwd();

$summary = <<<'TXT'
=======================

From             : %s
To               : %s
Target Directory : %s
Current DIrectory: %s

=======================
TXT;

e(sprintf($summary, $from, $to, $out, $cur_dir), 2);

$cmd = escapeshellcmd(sprintf('git diff --name-only %s %s', escapeshellarg($from), escapeshellarg($to)));

$result = exec($cmd, $output);

// 確認
$deleted = [];
$updated = [];

array_map(function($line) use ($cur_dir, &$updated, &$deleted){
	$path = $cur_dir.DIRECTORY_SEPARATOR.trim($line);
	if( file_exists($path) ){
		$updated[] = $line;
	}else{
		$deleted[] = $line;
	}
}, $output);

$summary = <<<'TXT'
[Updated]
%s

==============

[Deleted]
%s

==============

TXT;

e(sprintf($summary, implode(PHP_EOL, $updated), implode(PHP_EOL, $deleted)));

echo 'Are you sure to archive these files? [y/n]';

while($f = fgets(STDIN)){
	if( false !== array_search(strtolower(trim($f)), ['y', 'yes'])  ){
		e('Now archiving...');
		break;
	}else{
		d('Abort!');
	}
}

// Create directory
if( !is_dir($out) ){
	if( !mkdir($out, 0755, true) ){
		d(sprintf('[ERROR] Failed to create %s!', $out));
	}
}elseif( !is_writable($out) ){
	d(sprintf('[ERROR] %s is not writable!', $out));
}

foreach( $updated as $file ){
	$path = $cur_dir.DIRECTORY_SEPARATOR.$file;
	if( file_exists($path) ){
		$target = rtrim($out, DIRECTORY_SEPARATOR).DIRECTORY_SEPARATOR.$file;
		$dir = dirname($target);
		if( !is_dir($dir) ){
			mkdir($dir, 0755, true);
		}
		copy($path, $target);
		echo '.';
	}
}
echo PHP_EOL;
e(sprintf('[SUCCCESS] Archived on %s!', $out));

exit;