Make `nvm alias` list implicit "stable" and "unstable" aliases when they're not already aliases.

nvm.sh

@@ -876,6 +876,16 @@ nvm() {
             fi
           fi
         done
+
+        for ALIAS in "stable" "unstable"; do
+          if [ ! -f "$NVM_DIR/alias/$ALIAS" ]; then
+            if [ $# -lt 2 ] || [ "~$ALIAS" = "~$2" ]; then
+              DEST="$(nvm_print_implicit_alias local "$ALIAS")"
+              VERSION="$(nvm_version "$DEST")"
+              echo "$ALIAS -> $DEST (-> $VERSION) (default)"
+            fi
+          fi
+        done
         return
       fi
       if [ -z "$3" ]; then

test/fast/Aliases/Running "nvm alias" lists implicit aliases when they do not exist

@@ -0,0 +1,18 @@
+#!/bin/sh
+
+. ../../../nvm.sh
+
+die () { echo $@ ; exit 1; }
+
+NVM_ALIAS_OUTPUT=$(nvm alias)
+
+EXPECTED_STABLE="$(nvm_print_implicit_alias local stable)"
+STABLE_VERSION="$(nvm_version "$EXPECTED_STABLE")"
+echo "$NVM_ALIAS_OUTPUT" | \grep -e "^stable -> $EXPECTED_STABLE (-> $STABLE_VERSION) (default)$" \
+  || die "nvm alias did not contain the default local stable node version"
+
+EXPECTED_UNSTABLE="$(nvm_print_implicit_alias local unstable)"
+UNSTABLE_VERSION="$(nvm_version "$EXPECTED_UNSTABLE")"
+echo "$NVM_ALIAS_OUTPUT" | \grep -e "^unstable -> $EXPECTED_UNSTABLE (-> $UNSTABLE_VERSION) (default)$" \
+  || die "nvm alias did not contain the default local unstable node version"
+

test/fast/Aliases/Running "nvm alias" lists manual aliases instead of implicit aliases when present

@@ -0,0 +1,35 @@
+#!/bin/sh
+
+. ../../../nvm.sh
+
+die () { echo $@ ; cleanup ; exit 1; }
+cleanup () {
+  rm -rf ../../../v0.8.1
+  rm -rf ../../../v0.9.1
+}
+
+mkdir ../../../v0.8.1
+mkdir ../../../v0.9.1
+
+EXPECTED_STABLE="$(nvm_print_implicit_alias local stable)"
+STABLE_VERSION="$(nvm_version "$EXPECTED_STABLE")"
+
+EXPECTED_UNSTABLE="$(nvm_print_implicit_alias local unstable)"
+UNSTABLE_VERSION="$(nvm_version "$EXPECTED_UNSTABLE")"
+
+[ "_$STABLE_VERSION" != "_$UNSTABLE_VERSION" ] \
+  || die "stable and unstable versions are the same!"
+
+nvm alias stable "$EXPECTED_UNSTABLE"
+nvm alias unstable "$EXPECTED_STABLE"
+
+NVM_ALIAS_OUTPUT=$(nvm alias)
+
+echo "$NVM_ALIAS_OUTPUT" | \grep -e "^stable -> $EXPECTED_UNSTABLE (-> $UNSTABLE_VERSION)$" \
+  || die "nvm alias did not contain the overridden 'stable' alias"
+
+echo "$NVM_ALIAS_OUTPUT" | \grep -e "^unstable -> $EXPECTED_STABLE (-> $STABLE_VERSION)$" \
+  || die "nvm alias did not contain the overridden 'unstable' alias"
+
+cleanup
+

test/fast/Aliases/teardown_dir

@@ -6,3 +6,6 @@ for i in $(seq 1 10)
   rm -rf "../../../v0.0.$i"
 done
 
+rm -f "../../../alias/stable"
+rm -f "../../../alias/unstable"
+