homebrew-core/Formula/jpeg-turbo.rb

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require 'formula'
class JpegTurbo < Formula
homepage 'http://www.libjpeg-turbo.org/'
url 'http://downloads.sourceforge.net/project/libjpeg-turbo/1.2.1/libjpeg-turbo-1.2.1.tar.gz'
sha1 'a4992e102c6d88146709e8e6ce5896d5d0b5a361'
depends_on 'nasm' => :build if MacOS.prefer_64_bit?
keg_only "libjpeg-turbo is not linked to prevent conflicts with the standard libjpeg."
def install
args = ["--disable-dependency-tracking", "--prefix=#{prefix}"]
if MacOS.prefer_64_bit?
args << "--host=x86_64-apple-darwin"
# Auto-detect our 64-bit nasm
args << "NASM=#{Formula.factory('nasm').bin}/nasm"
end
system "./configure", *args
system 'make'
ENV.j1 # Stops a race condition error: file exists
system "make install"
end
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test do
system "#{bin}/jpegtran", "-crop", "500x500+200+500",
"-transpose", "-perfect",
"-outfile", "test.jpg",
"/System/Library/CoreServices/DefaultDesktop.jpg"
end
end