Move path utils out of formula.rb

Make a new module for our FileUtils extensions and use that instead.

1 files changed, 40 insertions, 0 deletions

diff --git a/Library/Homebrew/extend/fileutils.rb b/Library/Homebrew/extend/fileutils.rb
new file mode 100644
index 000000000..89c7de2fe
--- /dev/null
+++ b/Library/Homebrew/extend/fileutils.rb
@@ -0,0 +1,40 @@
+require 'fileutils'
+
+# We enhance FileUtils to make our Formula code more readable.
+module Homebrew::FileUtils
+  include FileUtils
+
+  # Create a temporary directory then yield. When the block returns,
+  # recursively delete the temporary directory.
+  def mktemp
+    # I used /tmp rather than `mktemp -td` because that generates a directory
+    # name with exotic characters like + in it, and these break badly written
+    # scripts that don't escape strings before trying to regexp them :(
+
+    # If the user has FileVault enabled, then we can't mv symlinks from the
+    # /tmp volume to the other volume. So we let the user override the tmp
+    # prefix if they need to.
+    tmp_prefix = ENV['HOMEBREW_TEMP'] || '/tmp'
+    tmp=Pathname.new `/usr/bin/mktemp -d #{tmp_prefix}/homebrew-#{name}-#{version}-XXXX`.strip
+    raise "Couldn't create build sandbox" if not tmp.directory? or $? != 0
+    begin
+      wd=Dir.pwd
+      chdir tmp
+      yield
+    ensure
+      chdir wd
+      tmp.rmtree
+    end
+  end
+
+  # A version of mkdir that also changes to that folder in a block.
+  def mkdir name, &block
+    super(name)
+    if block_given?
+      chdir name do
+        yield
+      end
+    end
+  end
+
+end