The ImageMagick stable and development source releases are available from Subversion. This a convenient way for developers to download the ImageMagick source, fix bugs, or add new features.
To retrieve, or check out ImageMagick stable, use this command:
$magick> svn co \
https://www.imagemagick.org/subversion/ImageMagick/branches/ImageMagick-6.5.8 \
ImageMagick-6.5.8
To retrieve, or check out ImageMagick development, use this command:
$magick> svn co https://www.imagemagick.org/subversion/ImageMagick/trunk ImageMagick
To update the sources within a previously checked out directory, execute:
$magick> svn update
and only the files which have changed are updated.