HTTP Proxies

If you are using Leiningen 2.x behind an HTTP proxy you need to set the http_proxy environment variable before launching Leiningen.

In Linux/Unix put this in ~/.profile:

http_proxy=http://username:password@proxy:port
https_proxy=http://username:password@proxy:port

Or in Windows:

http_proxy=http://username:password@proxy:port
https_proxy=http://username:password@proxy:port

Non-proxy hosts

To supply a list of hosts for which Lein should bypass the configured proxy, set the http_no_proxy environment variable:

http_no_proxy="*.example1.com|*.example2.com|*.example3.com"

Leiningen uses clj-http which is built on the Apache HttpComponents Client. This means that to set non-proxy hosts you're required to use the Java format (pipe-delimited).

Since 2.1.2, if http_no_proxy is not set then Leiningen will attempt to use your system's existing no_proxy environment variable to define non-proxy hosts. The format of the no_proxy value is likely to be incompatible with the clj-http proxy selector, so Leiningen will attempt to convert the value. An example of the conversion:

no_proxy="example1.com,example2.com,example3.com"

is equivalent to:

http_no_proxy="*example1.com|*example2.com|*example3.com"

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For unexpected behaviours could be useful to check the get-proxy-settings function on http://github.com/technomancy/leiningen/blob/master/leiningen-core/src/leiningen/core/classpath.clj#L86