#!/bin/sh

cleanup () {
  rm -rf "${FAKE_BIN_DIR}"
  PATH="$ORIGINAL_PATH"
  unset -f cleanup die fake_uname
  unset ORIGINAL_PATH FAKE_BIN_DIR
}
die () { echo "$@" ; cleanup ; exit 1; }

NVM_ENV=testing \. ../../install.sh

ORIGINAL_PATH="$PATH"
FAKE_BIN_DIR="$(mktemp -d)"
PATH="${FAKE_BIN_DIR}:${PATH}"

fake_uname() {
  printf '#!/bin/sh\necho %s\n' "$1" > "${FAKE_BIN_DIR}/uname"
  chmod +x "${FAKE_BIN_DIR}/uname"
}

type nvm_is_wsl > /dev/null 2>&1 || die 'nvm_is_wsl is not available'

fake_uname '6.6.87.2-microsoft-standard-WSL2'
nvm_is_wsl || die 'a WSL2 kernel release should be detected as WSL'

fake_uname '4.4.0-19041-Microsoft'
nvm_is_wsl || die 'a WSL1 kernel release should be detected as WSL'

if [ -e /proc/sys/fs/binfmt_misc/WSLInterop ] || [ -e /proc/sys/fs/binfmt_misc/WSLInterop-late ]; then
  echo 'skipping the non-WSL checks: this machine has a WSL interop entry'
else
  fake_uname '6.8.0-45-generic'
  ! nvm_is_wsl || die 'a non-WSL kernel release should not be detected as WSL'

  fake_uname '24.5.0'
  ! nvm_is_wsl || die 'a macOS kernel release should not be detected as WSL'
fi

cleanup