New formula: Asymptote

Asymptote is a 3D programmatic drawing environment
that integrates with TeX/LaTeX. It requires a MacTeX
installation (or equivalent).

Building asy from source is not exactly straightforward
(although not toooo difficult) on Mac OS X due to some
dependences; hopefully this formula helps some people
out.

Signed-off-by: David Höppner <0xffea@gmail.com>

* white spaces

1 files changed, 91 insertions, 0 deletions

diff --git a/Library/Formula/asymptote.rb b/Library/Formula/asymptote.rb
new file mode 100644
index 000000000..384b3c31e
--- /dev/null
+++ b/Library/Formula/asymptote.rb
@@ -0,0 +1,91 @@
+require 'formula'
+
+class Asymptote <Formula
+  url 'http://downloads.sourceforge.net/asymptote/asymptote-2.04.src.tgz'
+  homepage 'http://asymptote.sourceforge.net/'
+  md5 '6adb5d7714b662152b6f6f16c24f5751'
+
+  depends_on 'readline'
+  depends_on 'bdw-gc'
+
+  def TeX_installed?
+    texbin = `which latex`
+    if texbin==''
+      return false
+    else
+      return true
+    end
+  end
+
+  def link_asy_texmfhome
+
+    texmfhome = `kpsewhich -var-value=TEXMFHOME`
+    texmflocl = `kpsewhich -var-value=TEXMFLOCAL`
+    texmfhome.chop!
+    texmflocl.chop!
+
+    asyhome = "#{texmfhome}/tex/latex/asymptote-brew"
+    asylocl = "#{texmflocl}/tex/latex/asymptote"
+    system "mkdir -p #{asyhome}"
+
+    for asyfile in ['asycolors.sty','asymptote.sty','ocg.sty','latexmkrc']
+      system "ln -s -f #{asylocl}/#{asyfile} #{asyhome}/#{asyfile}"
+    end
+
+  end
+
+  def install
+    if TeX_installed?
+      system "./configure",
+        "--prefix=#{prefix}",
+        "--enable-gc=#{HOMEBREW_PREFIX}",
+        "--disable-fftw", "--disable-gsl" # follow TeX Live
+
+      system "make install"
+
+      link_asy_texmfhome
+
+    else
+      onoe <<-EOS.undent
+        Asymptote requires a TeX/LaTeX installation; aborting now.
+        You can obtain the TeX distribution for Mac OS X from
+            http://www.tug.org/mactex/
+      EOS
+    end
+
+  end
+
+  def caveats
+    caveats = <<-EOS
+1) This formula links the latest version of asymptote.sty into your user
+   texmf directory:
+
+       ~/Library/texmf/tex/asymptote-brew/asymptote.sty
+
+   This file links back to where the Asymptote source installer puts it:
+
+       /usr/local/texlive/texmf-local/tex/latex/asymptote/asymptote.sty
+
+   Other users of your machine will not be able to use the source-installed
+   version of asymptote.sty unless they perform a similar linking operation;
+   e.g.,
+
+       mkdir -p ~/Library/texmf/tex/asymptote-brew/
+       ln -s /usr/local/texlive/texmf-local/tex/latex/asymptote/asymptote.sty  ~/Library/texmf/tex/asymptote-brew/asymptote.sty
+
+   and similarly for asycolors.sty, ocg.sty, and latexmkrc.
+
+   If you are not using MacTeX / TeX Live or you have customised your TeX
+   distribution, the paths shown above may not match your particular system,
+   but you get the idea.
+
+
+2) If you wish to use xasy, run the following command to install the Python
+   Imaging Library (PIL):
+
+       easy_install http://effbot.org/downloads/Imaging-1.1.7.tar.gz
+
+    EOS
+  end
+
+end