robo self:update does not respect the HTTP_PROXY env variable

[c33s]

Steps to reproduce

robo self:update

while behind a proxy server, which is configured by env variables

HTTPS_PROXY=http://proxy.example.com:1080
HTTP_PROXY=http://proxy.example.com:1080

Expected behavior

should update

Actual behavior

 Failed to copy "https://github.com/consolidation/Robo/releases/download/1.2.3/robo.phar" to "C:\home\bin/robo-temp.phar" because source file could not be opened for reading.

self:update [-h|--help] [-q|--quiet] [-v|vv|vvv|--verbose] [-V|--version] [--ansi] [--no-ansi] [-n|--no-interaction] [--simulate] [--progress-delay PROGRESS-DELAY] [-D|--define DEFINE] [--] <command>

access to the net is firewalled and only allowed through the proxy.
a direct access it attemted (seen in firewall log)

System Configuration

win7x64, php7.1

[greg-1-anderson]

Works fine without a proxy. PR welcome.

[greg-1-anderson]

More useful suggestions can be found at #714 (comment)