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https://github.com/ptlis/diff-parser
A unified diff parser for PHP
https://github.com/ptlis/diff-parser
diff diff-parser php unified unified-diffs
Last synced: about 2 months ago
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A unified diff parser for PHP
- Host: GitHub
- URL: https://github.com/ptlis/diff-parser
- Owner: ptlis
- License: mit
- Created: 2015-01-20T20:09:43.000Z (over 9 years ago)
- Default Branch: main
- Last Pushed: 2023-01-12T19:36:46.000Z (over 1 year ago)
- Last Synced: 2024-04-24T08:29:24.699Z (5 months ago)
- Topics: diff, diff-parser, php, unified, unified-diffs
- Language: PHP
- Homepage:
- Size: 206 KB
- Stars: 27
- Watchers: 2
- Forks: 3
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGES.md
Awesome Lists containing this project
README
# ptlis/diff-parser
A parser for unified diff files, returning a hydrated object graph.
Uses __toString() to serialize back into unified diff format.
[](https://dl.circleci.com/status-badge/redirect/gh/ptlis/diff-parser/tree/main) [](https://codecov.io/gh/ptlis/diff-parser) [](https://packagist.org/packages/ptlis/diff-parser)
## Install
Install with composer:
```shell
$ composer require ptlis/diff-parser
```
## Usage
### Parsing a diff file
Create a parser:
```php
$parser = new \ptlis\DiffParser\Parser();
```
And then get a changeset from a file path:
```php
$changeset = $parser->parseFile('path/to/git/diff', Parser::VCS_GIT);
```
or parse the patch data stored from a variable:
```php
$changeset = $parser->parse($patchData, Parser::VCS_SVN);
```
### Serialization
All the value classes implement the ```__toString()``` method to support direct serialization of that component back to unified diff format.
For example this serializes the data in `$changeset` into the file `my.patch`.
```php
\file_put_contents('my.patch', $changeset);
```
### The Object Graph
The tree built to store changesets is very simple, mapping one-to-one to the components of a diff file. In essence:
* A Changeset is the root node & contains Files
* A File contain Hunks
* A Hunk contain Lines
* Lines are the leaf nodes.
#### Changeset
From a Changeset you may iterate over the array of files that have changed:
```php
foreach ($changeset->files as $file) {
// $file is an instance of ptlis\DiffParser\File
}
```
#### File
Get the original and new filenames:
```php
$file->filename->original; // Eg 'readme.md' or '' (empty) on create
$file->filename->new; // EG 'README.md' or '' (empty) on delete
```
Get the operation that was performed (create, delete or change):
```php
$file->operation; // One of File::CREATED, File::CHANGED, File::DELETED
```
From a file you may iterate over the change hunks:
```php
foreach ($file->hunks as $hunk) {
// $hunk is an instance of ptlis\DiffParser\Hunk
}
```
#### Hunk
Get the start line number of the hunk:
```php
$hunk->startLine->original; // Eg '0'
$hunk->startLine->new; // Eg '0'
```
Get the number of lines affected in the hunk:
```php
$hunk->affectedLines->original; // Eg '5'
$hunk->affectedLines->new; // Eg '7'
```
From a hunk you may iterate over the changed lines:
```php
foreach ($hunk->lines as $line) {
// $line is an instance of ptlis\DiffParser\Line
}
```
#### Line
Get the original and new line numbers:
```php
$line->number->original; // Eg '7' or '-1' on create
$line->number->new; // Eg '7' or '-1' on delete
```
Get the operation:
```php
$line->operation; // One of Line::ADDED, Line::REMOVED, Line::UNCHANGED
```
Get the value of the line:
```php
$line->content; // Eg ' $foo = bar;'
```
## Contributing
You can contribute by submitting an Issue to the [issue tracker](https://github.com/ptlis/vcs/issues), improving the documentation or submitting a pull request. For pull requests i'd prefer that the code style and test coverage is maintained, but I am happy to work through any minor issues that may arise so that the request can be merged.