nvm/test/installation_node/install while reinstalling packages

#!/bin/sh

# State touched by the regression section below; cleanup restores it even on failure.
DEFAULT_PACKAGES_FILE="${NVM_DIR}/default-packages"
DEFAULT_PACKAGES_BACKUP=""
DEFAULT_PACKAGES_WROTE=""
TEST_ALIAS=""

cleanup () {
  if [ -n "${DEFAULT_PACKAGES_WROTE}" ]; then
    rm -f "${DEFAULT_PACKAGES_FILE}"
    DEFAULT_PACKAGES_WROTE=""
  fi
  if [ -n "${DEFAULT_PACKAGES_BACKUP}" ] && [ -f "${DEFAULT_PACKAGES_BACKUP}" ]; then
    mv "${DEFAULT_PACKAGES_BACKUP}" "${DEFAULT_PACKAGES_FILE}"
    DEFAULT_PACKAGES_BACKUP=""
  fi
  if [ -n "${TEST_ALIAS}" ]; then
    nvm unalias "${TEST_ALIAS}" > /dev/null 2>&1 || true
    TEST_ALIAS=""
  fi
}

die () { echo "$@" ; cleanup ; exit 1; }

\. ../../nvm.sh

# Remove the stuff we're clobbering.
[ -e "${NVM_DIR}/versions/node/v9.7.0" ] && rm -R "${NVM_DIR}/versions/node/v9.7.0"
[ -e "${NVM_DIR}/versions/node/v9.10.0" ] && rm -R "${NVM_DIR}/versions/node/v9.10.0"
[ -e "${NVM_DIR}/versions/node/v4.9.1" ] && rm -R "${NVM_DIR}/versions/node/v4.9.1"

# Install from binary
nvm install 9.7.0

# Check
[ -d "${NVM_DIR}/versions/node/v9.7.0" ] || die "nvm install 9.7.0 didn't install"

nvm use 9.7.0

node --version | grep v9.7.0 > /dev/null || die "nvm use 9.7.0 failed"

npm install -g object-is@0.0.0 || die "npm install -g object-is failed"
npm list --global | grep object-is > /dev/null || die "object-is isn't installed"

nvm ls 9 | grep v9.7.0 > /dev/null || die "nvm ls 9 didn't show v9.7.0"

nvm install 9.10.0 --reinstall-packages-from=9 || die "nvm install 9.10.0 --reinstall-packages-from=9 failed"

[ -d "${NVM_DIR}/versions/node/v9.10.0" ] || die "nvm install 9.10.0 didn't install"

nvm use 9
node --version | grep v9.10.0 > /dev/null || die "nvm ls 9 didn't use v9.10.0"

npm list --global | grep object-is > /dev/null || die "object-is isn't installed"


# LTS

nvm install --lts=argon --reinstall-packages-from=9 || die "nvm install 9.10.0 --reinstall-packages-from=9 failed"

[ -d "${NVM_DIR}/versions/node/v4.9.1" ] || die "nvm install 4.9.1 didn't install"

nvm use --lts=argon
node --version | grep v4.9.1 > /dev/null || die "nvm ls --lts=argon didn't use v4.9.1"

npm list --global | grep object-is > /dev/null || die "object-is isn't installed"


# Regression: `--reinstall-packages-from` must still migrate packages when the
# target version is *already installed*. See https://github.com/nvm-sh/nvm/issues/3858

# install a fresh global package on the source (v9.7.0) only
nvm use 9.7.0
npm install -g is-nan@1.0.1 || die "npm install -g is-nan failed"
npm list --global --depth=0 | grep is-nan > /dev/null || die "is-nan isn't installed on v9.7.0"

# precondition: the already-installed target (v9.10.0) must not have it yet
nvm use 9.10.0
npm list --global --depth=0 | grep is-nan > /dev/null && die "is-nan should not be installed on v9.10.0 before reinstall"

# target is already installed, so this should report so AND still migrate packages
OUTPUT="$(nvm install --reinstall-packages-from=9.7.0 9.10.0 2>&1)" || die "nvm install --reinstall-packages-from=9.7.0 9.10.0 failed: ${OUTPUT}"
nvm_echo "${OUTPUT}" | grep "is already installed" > /dev/null || die "expected 'already installed' message, got: ${OUTPUT}"

nvm use 9.10.0
npm list --global --depth=0 | grep is-nan > /dev/null || die "is-nan was not migrated to already-installed v9.10.0"


# ...the same is true for default packages: they must install on the already-installed path too.

# back up any real default-packages file, then point it at a package the target lacks
if [ -f "${DEFAULT_PACKAGES_FILE}" ]; then
  DEFAULT_PACKAGES_BACKUP="${DEFAULT_PACKAGES_FILE}.3858.bak"
  mv "${DEFAULT_PACKAGES_FILE}" "${DEFAULT_PACKAGES_BACKUP}" || die "could not back up ${DEFAULT_PACKAGES_FILE}"
fi
DEFAULT_PACKAGES_WROTE=1
nvm_echo 'object-inspect@1.0.2' > "${DEFAULT_PACKAGES_FILE}"

# precondition: the already-installed target must not have the default package yet
nvm use 9.10.0
npm list --global --depth=0 | grep object-inspect > /dev/null && die "object-inspect should not be installed on v9.10.0 before default-packages test"

nvm install 9.10.0 > /dev/null 2>&1 || die "nvm install 9.10.0 (already installed, default-packages) failed"
nvm use 9.10.0
npm list --global --depth=0 | grep object-inspect > /dev/null || die "default packages were not installed on already-installed v9.10.0"

# restore the default-packages file before the next assertion
cleanup


# ...and `--alias` must be set on the already-installed path too.
TEST_ALIAS='nvm-3858-already-installed'
nvm unalias "${TEST_ALIAS}" > /dev/null 2>&1 || true # ensure a clean precondition
nvm install --alias="${TEST_ALIAS}" 9.10.0 > /dev/null 2>&1 || die "nvm install --alias=${TEST_ALIAS} 9.10.0 (already installed) failed"
TERM=dumb nvm alias "${TEST_ALIAS}" | grep 'v9.10.0' > /dev/null || die "--alias was not set on already-installed v9.10.0"

cleanup