nvm/test/installation_node/install already installed u...

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#!/bin/sh
die () { echo "$@" ; exit 1; }
\. ../../nvm.sh
[ "$(nvm install invalid.invalid 2>&1)" = "Version 'invalid.invalid' not found - try \`nvm ls-remote\` to browse available versions." ] || die "nvm installing an invalid version did not print a nice error message"
# Remove the stuff we're clobbering.
[ -e "${NVM_DIR}/v0.9.7" ] && rm -R "${NVM_DIR}/v0.9.7"
[ -e "${NVM_DIR}/v0.9.12" ] && rm -R "${NVM_DIR}/v0.9.12"
# Install from binary
nvm install 0.9.7
nvm install 0.9.12
nvm use 0.9.7
node --version | grep v0.9.7 || die "precondition failed: node doesn't start at 0.9.7"
nvm install 0.9.12
node --version | grep v0.9.12 || die "nvm install on already installed version doesn't use it"