3 files changed, 30 insertions, 0 deletions
diff --git a/Library/Homebrew/dependency_collector.rb b/Library/Homebrew/dependency_collector.rb
index dc75c884d..546e92af3 100644
--- a/Library/Homebrew/dependency_collector.rb
+++ b/Library/Homebrew/dependency_collector.rb
@@ -119,6 +119,7 @@ class DependencyCollector
     when :python, :python2 then PythonDependency.new(tags)
     when :python3    then Python3Dependency.new(tags)
     when :java       then JavaDependency.new(tags)
+    when :osxfuse    then OsxfuseDependency.new(tags)
     # Tiger's ld is too old to properly link some software
     when :ld64       then LD64Dependency.new if MacOS.version < :leopard
     when :ant        then ant_dep(spec, tags)
diff --git a/Library/Homebrew/requirements.rb b/Library/Homebrew/requirements.rb
index 049e70d8d..add17b24e 100644
--- a/Library/Homebrew/requirements.rb
+++ b/Library/Homebrew/requirements.rb
@@ -3,6 +3,7 @@ require 'requirements/fortran_dependency'
 require 'requirements/language_module_dependency'
 require 'requirements/minimum_macos_requirement'
 require 'requirements/mpi_dependency'
+require 'requirements/osxfuse_dependency'
 require 'requirements/python_dependency'
 require 'requirements/x11_dependency'
 
diff --git a/Library/Homebrew/requirements/osxfuse_dependency.rb b/Library/Homebrew/requirements/osxfuse_dependency.rb
new file mode 100644
index 000000000..b8f09c8f0
--- /dev/null
+++ b/Library/Homebrew/requirements/osxfuse_dependency.rb
@@ -0,0 +1,28 @@
+require "requirement"
+
+class OsxfuseDependency < Requirement
+  fatal true
+  default_formula "osxfuse"
+  satisfy { Formula["osxfuse"].installed? || self.class.binary_osxfuse_installed? }
+
+  def self.binary_osxfuse_installed?
+    File.exist?("/usr/local/include/osxfuse/fuse.h") && !File.symlink?("/usr/local/include/osxfuse")
+  end
+
+  env do
+    ENV.append_path "PKG_CONFIG_PATH", HOMEBREW_PREFIX/"Library/ENV/pkgconfig/fuse"
+  end
+
+end
+
+class ConflictsWithBinaryOsxfuse < Requirement
+  fatal true
+  satisfy { HOMEBREW_PREFIX.to_s != "/usr/local" || !OsxfuseDependency.binary_osxfuse_installed? }
+
+  def message
+    <<-EOS.undent
+      osxfuse is already installed from the binary distribution and
+      conflicts with this formula.
+    EOS
+  end
+end