[Robustness] use command dirname

nvm-exec

@@ -2,10 +2,10 @@
 
 SOURCE=${BASH_SOURCE[0]}
 if [ -L "${SOURCE}" ]; then
- command cd "$(dirname "${SOURCE}")" || exit 127
+ command cd "$(command dirname "${SOURCE}")" || exit 127
  SOURCE="$(readlink "${SOURCE}")"
 fi
-DIR="$(command cd "$(dirname "${SOURCE}")" && pwd)"
+DIR="$(command cd "$(command dirname "${SOURCE}")" && pwd)"
 
 unset NVM_CD_FLAGS
 

nvm.sh

@@ -403,7 +403,7 @@ if [ -z "${NVM_DIR-}" ]; then
  NVM_SCRIPT_SOURCE="${BASH_SOURCE[0]}"
  fi
  # shellcheck disable=SC2086
- NVM_DIR="$(nvm_cd ${NVM_CD_FLAGS} "$(dirname "${NVM_SCRIPT_SOURCE:-$0}")" >/dev/null && \pwd)"
+ NVM_DIR="$(nvm_cd ${NVM_CD_FLAGS} "$(command dirname "${NVM_SCRIPT_SOURCE:-$0}")" >/dev/null && \pwd)"
  export NVM_DIR
 else
  # https://unix.stackexchange.com/a/198289
@@ -431,11 +431,11 @@ nvm_tree_contains_path() {
  local previous_pathdir
  previous_pathdir="${node_path}"
  local pathdir
- pathdir=$(dirname "${previous_pathdir}")
+ pathdir=$(command dirname "${previous_pathdir}")
  while [ "${pathdir}" != '' ] && [ "${pathdir}" != '.' ] && [ "${pathdir}" != '/' ] &&
  [ "${pathdir}" != "${tree}" ] && [ "${pathdir}" != "${previous_pathdir}" ]; do
  previous_pathdir="${pathdir}"
- pathdir=$(dirname "${previous_pathdir}")
+ pathdir=$(command dirname "${previous_pathdir}")
  done
  [ "${pathdir}" = "${tree}" ]
 }
@@ -2152,7 +2152,7 @@ nvm_install_binary() {
  nvm_echo "Downloading and installing ${NODE_OR_IOJS-} ${VERSION}..."
  TARBALL="$(PROGRESS_BAR="${PROGRESS_BAR}" nvm_download_artifact "${FLAVOR}" binary "${TYPE-}" "${VERSION}" | command tail -1)"
  if [ -f "${TARBALL}" ]; then
- TMPDIR="$(dirname "${TARBALL}")/files"
+ TMPDIR="$(command dirname "${TARBALL}")/files"
  fi
 
  if nvm_install_binary_extract "${NVM_OS}" "${PREFIXED_VERSION}" "${VERSION}" "${TARBALL}" "${TMPDIR}"; then
@@ -2519,7 +2519,7 @@ nvm_install_source() {
 
  TARBALL="$(PROGRESS_BAR="${PROGRESS_BAR}" nvm_download_artifact "${FLAVOR}" source "${TYPE}" "${VERSION}" | command tail -1)" && \
  [ -f "${TARBALL}" ] && \
- TMPDIR="$(dirname "${TARBALL}")/files" && \
+ TMPDIR="$(command dirname "${TARBALL}")/files" && \
  if ! (
  # shellcheck disable=SC2086
  command mkdir -p "${TMPDIR}" && \
@@ -3874,7 +3874,7 @@ nvm() {
  local NVM_EXEC
  NVM_EXEC="${NVM_DIR}/nvm-exec"
  if [ ! -f "${NVM_EXEC}" ]; then
- NVM_EXEC="$(dirname "${BASH_SOURCE[0]-}")/nvm-exec"
+ NVM_EXEC="$(command dirname "${BASH_SOURCE[0]-}")/nvm-exec"
  fi
  NODE_VERSION="${VERSION}" "${NVM_EXEC}" "$@"
  ;;