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Detect binary file by NULL byte #219

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merged 2 commits into from
Apr 24, 2024
Merged

Detect binary file by NULL byte #219

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ac5287b
Detect binary file by NULL byte
Patrick-Beuks Apr 23, 2024
e35108e
Add description where the binary check and values come from
Patrick-Beuks Apr 24, 2024
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22 changes: 21 additions & 1 deletion src/Gitonomy/Git/Blob.php
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,11 @@
*/
class Blob
{
/**
* @var int Size that git uses to look for NULL byte: https://git.kernel.org/pub/scm/git/git.git/tree/xdiff-interface.c?h=v2.44.0#n193
*/
private const FIRST_FEW_BYTES = 8000;
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Can you add a little comment that point to git source code?

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Added the comment. Is it clear enough?

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perfect. Thanks


/**
* @var Repository
*/
Expand All @@ -39,6 +44,11 @@ class Blob
*/
protected $mimetype;

/**
* @var bool
*/
protected $text;

/**
* @param Repository $repository Repository where the blob is located
* @param string $hash Hash of the blob
Expand Down Expand Up @@ -89,6 +99,9 @@ public function getMimetype()
/**
* Determines if file is binary.
*
* Uses the same check that git uses to determine if a file is binary or not
* https://git.kernel.org/pub/scm/git/git.git/tree/xdiff-interface.c?h=v2.44.0#n193
*
* @return bool
*/
public function isBinary()
Expand All @@ -99,10 +112,17 @@ public function isBinary()
/**
* Determines if file is text.
*
* Uses the same check that git uses to determine if a file is binary or not
* https://git.kernel.org/pub/scm/git/git.git/tree/xdiff-interface.c?h=v2.44.0#n193
*
* @return bool
*/
public function isText()
{
return (bool) preg_match('#^text/|^application/xml#', $this->getMimetype());
if (null === $this->text) {
$this->text = !str_contains(substr($this->getContent(), 0, self::FIRST_FEW_BYTES), chr(0));
}

return $this->text;
}
}
17 changes: 13 additions & 4 deletions tests/Gitonomy/Git/Tests/BlobTest.php
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Expand Up @@ -23,6 +23,11 @@ public function getReadmeBlob($repository)
return $repository->getCommit(self::LONGFILE_COMMIT)->getTree()->resolvePath('README.md');
}

public function getImageBlob($repository)
{
return $repository->getCommit(self::LONGFILE_COMMIT)->getTree()->resolvePath('image.jpg');
}

/**
* @dataProvider provideFoobar
*/
Expand Down Expand Up @@ -67,16 +72,20 @@ public function testGetMimetype($repository)
*/
public function testIsText($repository)
{
$blob = $this->getReadmeBlob($repository);
$this->assertTrue($blob->isText());
$readmeBlob = $this->getReadmeBlob($repository);
$this->assertTrue($readmeBlob->isText());
$imageBlob = $this->getImageBlob($repository);
$this->assertFalse($imageBlob->isText());
}

/**
* @dataProvider provideFoobar
*/
public function testIsBinary($repository)
{
$blob = $this->getReadmeBlob($repository);
$this->assertFalse($blob->isBinary());
$readmeBlob = $this->getReadmeBlob($repository);
$this->assertFalse($readmeBlob->isBinary());
$imageBlob = $this->getImageBlob($repository);
$this->assertTrue($imageBlob->isBinary());
}
}
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