Install script uses Bashisms, but uses /bin/sh as interpreter

[sersorrel]

The install script says it's a POSIX shell script:

website/install.sh

Line 1 in e6b4964

#!/bin/sh

but uses many Bashisms including [[ and read -n:

website/install.sh

Line 52 in e6b4964

if [[ -z "$(command -v gpg)" ]]; then

website/install.sh

Line 95 in e6b4964

if [[ $YARN_PROFILE == *"fish"* ]]; then

website/install.sh

Line 208 in e6b4964

read -p "$1 [y/N] " -n 1 -r

website/install.sh

Line 210 in e6b4964

if [[ ! $REPLY =~ ^[Yy]$ ]]

This means that it doesn't work on any Linux distribution which uses dash (or anything else that's not Bash) to provide /bin/sh, which includes e.g. Ubuntu.