ngrok: rewrite to download all dependencies with fetch* functions

pkgs/tools/misc/ngrok/default.nix

@@ -1,6 +1,41 @@
-{ stdenv, fetchurl, go, git, mercurial, bazaar, cacert }:
+{ stdenv, fetchurl, go, fetchgit, fetchbzr, fetchhg }:
 
-stdenv.mkDerivation rec {
+let
+  go-websocket = fetchgit {
+    url = "git://github.com/garyburd/go-websocket";
+    rev = "refs/heads/master";
+    sha256 = "1e4fcff29c961cd7433ba1b655412d466edfeb1f0829b41f578764857bc801fe";
+  };
+  go-metrics = fetchgit {
+    url = "https://github.com/inconshreveable/go-metrics";
+    sha256 = "3dc8c229ce5123d86269c0c48401a9cdd2cde7558d85374c9dbc4bbd531e86d5";
+  };
+  termbox-go = fetchgit {
+    url = "https://github.com/nsf/termbox-go";
+    sha256 = "6b23e8eabb1c7a99dc8c5a7dd5ecb2c2ae736c7f54e485548d08ac337b3a0400";
+  };
+  go-bindata = fetchgit {
+    url = "https://github.com/inconshreveable/go-bindata";
+    sha256 = "518a5b61cfbe58f8bc55bd6139adcd69997b6ba474536a70b538879aaf118578";
+  };
+  go-update = fetchgit {
+    url = "https://github.com/inconshreveable/go-update";
+    sha256 = "34647689a50b9d12e85a280d9034cc1772079163481c4778ee4b3e6c4b41e2f4";
+  };
+  goyaml = fetchbzr {
+    url = "https://launchpad.net/goyaml";
+    sha256 = "03is37cgw62cha316xrs5h7q97im46ry5qldkfvbhimjq3ww0swj";
+    revision = "branch:lp:goyaml";
+  };
+  log4go = fetchhg {
+    url = "https://code.google.com/p/log4go/";
+    sha256 = "0q906sxrmwir295virfibqvdzlaj340qh2r4ysx1ccjrjazc0q5p";
+  };
+  osext = fetchhg {
+    url = "https://bitbucket.org/kardianos/osext";
+    sha256 = "1w9x2zj716agfd5x5497ajb9nz3ljar74768vjidsyly143vzjws";
+  };
+in stdenv.mkDerivation rec {
   name = "ngrok-${version}";
   version = "1.6";
 
@@ -9,19 +44,44 @@ stdenv.mkDerivation rec {
     sha256 = "0w54ck00ma8wd87gc3dligypdjs7vrzbi9py46sqphsid3rihkjr";
   };
 
-  buildInputs = [ go git mercurial bazaar ];
-
-  GIT_SSL_CAINFO = "${cacert}/etc/ca-bundle.crt";
+  buildInputs = [ go ];
 
   preBuild = ''
     export HOME="$PWD"
+
+    mkdir -p src/github.com/garyburd/go-websocket/
+    ln -s ${go-websocket}/* src/github.com/garyburd/go-websocket
+
+    mkdir -p src/github.com/inconshreveable/go-metrics/
+    ln -s ${go-metrics}/* src/github.com/inconshreveable/go-metrics
+
+    mkdir -p src/github.com/inconshreveable/go-bindata
+    ln -s ${go-bindata}/* src/github.com/inconshreveable/go-bindata
+
+    mkdir -p src/github.com/inconshreveable/go-update
+    ln -s ${go-update}/* src/github.com/inconshreveable/go-update
+
+    mkdir -p src/github.com/nsf/termbox-go/
+    ln -s ${termbox-go}/* src/github.com/nsf/termbox-go
+
+    mkdir -p src/launchpad.net/goyaml
+    ln -s ${goyaml}/* src/launchpad.net/goyaml
+
+    mkdir -p src/code.google.com/p/log4go
+    ln -s ${log4go}/* src/code.google.com/p/log4go
+
+    mkdir -p src/bitbucket.org/kardianos/osext
+    ln -s ${osext}/* src/bitbucket.org/kardianos/osext
+
+    # don't download dependencies as we already have them
+    sed -i '/go get/d' Makefile
   '';
 
   installPhase = ''
     make release-client
     mkdir -p $out/bin
     cp bin/ngrok $out/bin
-    cp -R assets $out/
+    cp -R assets $out
   '';
 
   meta = with stdenv.lib; {