Allow --mirror=file://... by using curl instead of wget

[afrantisak]

If we use curl instead of wget we can then use the file:// protocol in the --mirror argument to use a local cache directly.

[tombujok]

AFAIK, curl does not work with corporate NTLM proxies.

[afrantisak]

Would love to test this behind our corporate proxy but can't seem to build. Under both cygwin(babun) and windows command prompt I get:

Caught: java.io.IOException: Cannot run program "groovy" (in directory "D:\babun-mirror\.babun\cygwin\home\username\babun\babun-packages"): CreateProcess error=2, The system cannot find the file specified
java.io.IOException: Cannot run program "groovy" (in directory "D:\babun-mirror\.babun\cygwin\home\username\babun\babun-packages"): CreateProcess error=2, The system cannot find the file specified

Groovy is installed in both cygwin(babun) and Windows:

{ ~ }  » groovy --version                                                                                                      ~
Groovy Version: 2.4.5 JVM: 1.7.0_79 Vendor: Oracle Corporation OS: Windows 8
D:\temp\babun\babun-packages>groovy --version
Groovy Version: 2.3.6 JVM: 1.7.0_79 Vendor: Oracle Corporation OS: Windows 8

Also can you point me at the jenkins build, maybe I can see how it does it. Thanks.