#!/bin/sh

WORK="${PWD}/nvm-is-cached-artifact-work.$$"

cleanup() {
  command rm -rf "${WORK}"
  NVM_DIR="${OLD_NVM_DIR}"
  unset -f cleanup die check
}
die () { echo "$@" ; cleanup ; exit 1; }

\. ../../../nvm.sh

OLD_NVM_DIR="${NVM_DIR}"

check() {
  EXPECTED="${1}"
  shift
  ACTUAL=0
  nvm_is_cached_artifact "$@" || ACTUAL=$?
  [ "${ACTUAL}" = "${EXPECTED}" ] || die "nvm_is_cached_artifact '$*' (NVM_DIR '${NVM_DIR}'): expected exit code ${EXPECTED}, got ${ACTUAL}"
}

NVM_DIR="${WORK}/nvm"
CACHE="$(nvm_cache_dir)"
[ "${CACHE}" = "${NVM_DIR}/.cache" ] || die "expected cache dir '${NVM_DIR}/.cache', got '${CACHE}'"

command mkdir -p "${CACHE}/bin/node-v8.0.0-linux-x64" "${CACHE}/src/node-v8.0.0/files" "${WORK}/project" "${WORK}/nvm/.cache-other" "${WORK}/outside"
echo tarball > "${CACHE}/bin/node-v8.0.0-linux-x64/node-v8.0.0-linux-x64.tar.xz"
echo tarball > "${CACHE}/top-level.tar.gz"
echo not-a-cached-tarball > "${WORK}/project/404"
echo not-a-cached-tarball > "${WORK}/outside/node-v8.0.0.tar.xz"
echo not-a-cached-tarball > "${WORK}/nvm/.cache-other/node-v8.0.0.tar.xz"
echo not-a-cached-tarball > "${WORK}/nvm/.cachefile"

# existing files inside the cache are accepted, at any depth
check 0 "${CACHE}/bin/node-v8.0.0-linux-x64/node-v8.0.0-linux-x64.tar.xz"
check 0 "${CACHE}/top-level.tar.gz"

# no argument, or an empty one, is rejected
check 1
check 1 ''

# paths in the cache that are not existing regular files are rejected
check 1 "${CACHE}"
check 1 "${CACHE}/"
check 1 "${CACHE}/bin"
check 1 "${CACHE}/src/node-v8.0.0/files"
check 1 "${CACHE}/bin/node-v8.0.0-linux-x64/missing.tar.xz"

# existing files outside the cache are rejected
check 1 "${WORK}/outside/node-v8.0.0.tar.xz"
check 1 "${NVM_DIR}/.cachefile"
check 1 "${NVM_DIR}/.cache-other/node-v8.0.0.tar.xz"

# a downloader's stray output that names a file relative to the current directory is rejected
(
  cd "${WORK}/project" || exit 2
  [ -f 404 ] || exit 2
  nvm_is_cached_artifact 404 && exit 3
  exit 0
)
RESULT=$?
[ "${RESULT}" = 0 ] || die "nvm_is_cached_artifact '404' in a directory containing '404': expected rejection, got subshell exit code ${RESULT}"

# a relative path that happens to reach a cached file is still rejected, since it is not under the cache dir
(
  cd "${CACHE}" || exit 2
  [ -f top-level.tar.gz ] || exit 2
  nvm_is_cached_artifact top-level.tar.gz && exit 3
  exit 0
)
RESULT=$?
[ "${RESULT}" = 0 ] || die "nvm_is_cached_artifact 'top-level.tar.gz' from inside the cache dir: expected rejection, got subshell exit code ${RESULT}"

# glob characters in NVM_DIR are matched literally, not as a pattern
NVM_DIR="${WORK}/n*"
command mkdir -p "$(nvm_cache_dir)"
echo tarball > "$(nvm_cache_dir)/glob.tar.xz"
echo not-a-cached-tarball > "${WORK}/nvm/.cache/glob.tar.xz"
check 0 "${WORK}/n*/.cache/glob.tar.xz"
check 1 "${WORK}/nvm/.cache/glob.tar.xz"

cleanup