[New] `nvm ls`: add `--no-alias` to suppress alias output

Per https://github.com/creationix/nvm/issues/1792#issuecomment-466696504

.editorconfig

@@ -15,5 +15,8 @@ indent_size = false
 [test/fast/Listing versions/Running "nvm ls" calls into nvm_alias]
 indent_size = false
 
+[test/fast/Listing versions/Running "nvm ls --no-alias" does not call into nvm_alias]
+indent_size = false
+
 [Makefile]
 indent_style = tab

nvm.sh

@@ -3138,10 +3138,12 @@ nvm() {
     "ls" | "list")
       local PATTERN
       local NVM_NO_COLORS
+      local NVM_NO_ALIAS
       while [ $# -gt 0 ]; do
         case "${1}" in
           --) ;;
           --no-colors) NVM_NO_COLORS="${1}" ;;
+          --no-alias) NVM_NO_ALIAS="${1}" ;;
           --*)
             nvm_err "Unsupported option \"${1}\"."
             return 55
@@ -3152,12 +3154,16 @@ nvm() {
         esac
         shift
       done
+      if [ -n "${PATTERN-}" ] && [ -n "${NVM_NO_ALIAS}" ]; then
+        nvm_err '`--no-alias` is not supported when a pattern is provided.'
+        return 55
+      fi
       local NVM_LS_OUTPUT
       local NVM_LS_EXIT_CODE
       NVM_LS_OUTPUT=$(nvm_ls "${PATTERN-}")
       NVM_LS_EXIT_CODE=$?
       NVM_NO_COLORS="${NVM_NO_COLORS-}" nvm_print_versions "${NVM_LS_OUTPUT}"
-      if [ -z "${PATTERN-}" ]; then
+      if [ -z "${NVM_NO_ALIAS-}" ] && [ -z "${PATTERN-}" ]; then
         if [ -n "${NVM_NO_COLORS-}" ]; then
           nvm alias --no-colors
         else

test/fast/Listing versions/Running "nvm ls --no-alias" does not call into nvm_alias

@@ -0,0 +1,34 @@
+#!/bin/sh
+
+\. ../../../nvm.sh
+\. ../../common.sh
+
+die () { echo "$@" ; unset -f nvm_ls nvm_list_aliases; exit 1; }
+
+make_fake_node v0.12.87 || die 'fake v0.12.87 could not be made'
+make_fake_node v0.12.9 || die 'fake v0.12.9 could not be made'
+make_fake_iojs v0.1.2 || die 'fake iojs-v0.1.2 could not be made'
+make_fake_iojs v0.10.2 || die 'fake iojs-v0.10.2 could not be made'
+
+set -e
+
+nvm_list_aliases() {
+  echo 'sd-6'
+}
+# sanity check
+OUTPUT="$(nvm alias)"
+EXPECTED_OUTPUT='sd-6'
+[ "${OUTPUT}" = "${EXPECTED_OUTPUT}" ] || die "1: expected >${EXPECTED_OUTPUT}<; got >${OUTPUT}<"
+
+nvm_ls() {
+  echo v0.12.87
+  echo v0.12.9
+  echo iojs-v0.1.2
+  echo iojs-v0.10.2
+}
+OUTPUT="$(nvm ls --no-colors --no-alias)"
+EXPECTED_OUTPUT="       v0.12.87 *
+        v0.12.9 *
+    iojs-v0.1.2 *
+   iojs-v0.10.2 *"
+[ "${OUTPUT}" = "${EXPECTED_OUTPUT}" ] || die "2: expected >${EXPECTED_OUTPUT}<; got >${OUTPUT}<"

test/fast/Listing versions/Running "nvm ls --no-alias" with a pattern errors

@@ -0,0 +1,15 @@
+#!/bin/sh
+
+\. ../../../nvm.sh
+\. ../../common.sh
+
+die () { echo "$@" ; unset -f nvm_ls nvm_list_aliases; exit 1; }
+
+set -e
+
+OUTPUT="$(nvm ls --no-colors --no-alias pattern 2>&1 ||:)"
+EXPECTED_OUTPUT='`--no-alias` is not supported when a pattern is provided.'
+EXIT_CODE="$(nvm ls --no-colors --no-alias pattern >/dev/null 2>&1 || echo $?)"
+[ "${OUTPUT}" = "${EXPECTED_OUTPUT}" ] || die "expected >${EXPECTED_OUTPUT}<; got >${OUTPUT}<"
+
+[ "${EXIT_CODE}" = 55 ] || die "expected 55; got >${EXIT_CODE}<"