(GH-1173) Set proxy information at runtime

Allow passing proxy override information with each command. This allows
the following items to be passed: `--proxy="'value'"
--proxy-user="'<user>'" --proxy-password="'<pwd>'"
--proxy-bypass-list="'<comma separated, list>'"
--proxy-bypass-on-local`.

src/chocolatey.resources/helpers/ChocolateyTabExpansion.ps1

@@ -34,7 +34,7 @@ function script:chocoCmdOperations($commands, $command, $filter, $currentArgumen
 
 $script:someCommands = @('-?','search','list','info','install','outdated','upgrade','uninstall','new','download','pack','push','-h','--help','pin','source','config','feature','apikey')
 
-$allcommands = " --debug --verbose --force --noop --help --accept-license --confirm --limit-output --execution-timeout= --cache-location='' --fail-on-error-output --use-system-powershell"
+$allcommands = " --debug --verbose --force --noop --help --accept-license --confirm --limit-output --no-progress --execution-timeout= --cache-location='' --proxy='' --proxy-user= --proxy-password= --proxy-bypass-list='' --proxy-bypass-on-local --fail-on-error-output --use-system-powershell"
 $proInstallUpgradeOptions = " --install-directory='Pro/Biz editions' --skip-download-cache --use-download-cache --skip-virus-check --virus-check --virus-positives-minimum="
 $proNewOptions = " --file=<biz>"
 

src/chocolatey/infrastructure.app/builders/ConfigurationBuilder.cs

@@ -372,6 +372,21 @@ private static void set_global_options(IList<string> args, ChocolateyConfigurati
                             .Add("no-progress",
                                  "Do Not Show Progress - Do not show download progress percentages. Available in 0.10.4+.",
                                  option => config.Features.ShowDownloadProgress = option == null)
+                            .Add("proxy=",
+                                "Proxy Location - Explicit proxy location. Overrides the default proxy location of '{0}'. Available for config settings in 0.9.9.9+, this CLI option available in 0.10.4+.".format_with(config.Proxy.Location),
+                                option => config.Proxy.Location = option.remove_surrounding_quotes())
+                            .Add("proxy-user=",
+                                "Proxy User Name - Explicit proxy user (optional). Requires explicity proxy (`--proxy` or config setting). Overrides the default proxy user of '{0}'. Available for config settings in 0.9.9.9+, this CLI option available in 0.10.4+.".format_with(config.Proxy.User),
+                                option => config.Proxy.User = option.remove_surrounding_quotes())
+                            .Add("proxy-password=",
+                                "Proxy Password - Explicit proxy password (optional) to be used with username. Requires explicity proxy (`--proxy` or config setting) and user name.  Overrides the default proxy password (encrypted in settings if set). Available for config settings in 0.9.9.9+, this CLI option available in 0.10.4+.",
+                                option => config.Proxy.EncryptedPassword = NugetEncryptionUtility.EncryptString(option.remove_surrounding_quotes()))
+                            .Add("proxy-bypass-list=",
+                                 "ProxyBypassList - Comma separated list of regex locations to bypass on proxy. Requires explicity proxy (`--proxy` or config setting). Overrides the default proxy bypass list of '{0}'. Available in 0.10.4+.".format_with(config.Proxy.BypassList),
+                                 option => config.Proxy.BypassList = option.remove_surrounding_quotes())
+                            .Add("proxy-bypass-on-local",
+                                 "Proxy Bypass On Local - Bypass proxy for local connections. Requires explicity proxy (`--proxy` or config setting). Overrides the default proxy bypass on local setting of '{0}'. Available in 0.10.4+.".format_with(config.Proxy.BypassOnLocal),
+                                 option => config.Proxy.BypassOnLocal = option != null)
                             ;
                     },
                 (unparsedArgs) =>