[RUBY] What to do if a communication error occurs due to proxy when installing with package management of pip, npm, gem

Make a note of what to do if a communication error occurs when installing a package from the command line.

It seemed that the error was caused by the Proxy setting, so I investigated how to set it.

The proxy was as follows in Internet Explorer Internet Options-> Connections-> LAN Settings

-[x] Use automatic configuration script http://proxy.-----.co.jp/proxy.pac

(----- is Hidden)

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python pip

Add --proxy = to the command

Example pip install --proxy=http://proxy.------.co.jp/proxy.pac --upgrade google-api-python-client

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Node.js npm

Set proxy and https-proxy with npm config set.

Example npm config set proxy http://proxy.-----.co.jp/proxy.pac npm config set https-proxy http://proxy.-----.co.jp/proxy.pac npm install googleapis --save

The contents set in config can be confirmed below. npm config list

Detail is npm config ls -l

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Ruby gem

Add -p to the command

Example: gem install mechanize -r -p http://proxy.-----.co.jp/proxy.pac

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