Copy packages when applicable, whenever `nvm install` would normally `nvm use` and exit.

nvm.sh

@@ -496,7 +496,9 @@ nvm() {
 
       if [ -d "$(nvm_version_path "$VERSION")" ]; then
         echo "$VERSION is already installed." >&2
-        nvm use "$VERSION"
+        if nvm use "$VERSION" && [ ! -z "$COPY_PACKAGES_FROM" ] && [ "~$COPY_PACKAGES_FROM" != "~N/A" ]; then
+          nvm copy-packages "$COPY_PACKAGES_FROM"
+        fi
         return $?
       fi
 
@@ -526,7 +528,9 @@ nvm() {
               mv "$tmpdir" "$(nvm_version_path "$VERSION")"
               )
             then
-              nvm use $VERSION
+              if nvm use "$VERSION" && [ ! -z "$COPY_PACKAGES_FROM" ] && [ "~$COPY_PACKAGES_FROM" != "~N/A" ]; then
+                nvm copy-packages "$COPY_PACKAGES_FROM"
+              fi
               return $?
             else
               echo "Binary download failed, trying source." >&2
@@ -570,7 +574,9 @@ nvm() {
         $make $MAKE_CXX install
         )
       then
-        nvm use $VERSION
+        if nvm use "$VERSION" && [ ! -z "$COPY_PACKAGES_FROM" ] && [ "~$COPY_PACKAGES_FROM" != "~N/A" ]; then
+          nvm copy-packages "$COPY_PACKAGES_FROM"
+        fi
         if ! nvm_has "npm" ; then
           echo "Installing npm..."
           if nvm_version_greater 0.2.0 "$VERSION"; then
@@ -589,6 +595,8 @@ nvm() {
         echo "nvm: install $VERSION failed!" >&2
         return 1
       fi
+
+      return $?
     ;;
     "uninstall" )
       [ $# -ne 2 ] && nvm help && return

test/installation/install while copying packages

@@ -0,0 +1,34 @@
+#!/bin/sh
+
+die () { echo $@ ; exit 1; }
+
+. ../../nvm.sh
+
+# Remove the stuff we're clobbering.
+[ -e ../../v0.9.7 ] && rm -R ../../v0.9.7
+[ -e ../../v0.9.12 ] && rm -R ../../v0.9.12
+
+# Install from binary
+nvm install 0.9.7
+
+# Check
+[ -d ../../v0.9.7 ] || die "nvm install 0.9.7 didn't install"
+
+nvm use 0.9.7
+
+node --version | grep v0.9.7 > /dev/null || die "nvm use 0.9.7 failed"
+
+npm install -g is-nan@1.0.1 || die "npm install -g is-nan failed"
+npm list --global | grep is-nan > /dev/null || die "is-nan isn't installed"
+
+nvm ls 0.9 | grep v0.9.7 > /dev/null || die "nvm ls 0.9 didn't show v0.9.7"
+
+nvm install 0.9.12 --copy-packages-from=0.9 || die "nvm install 0.9.12 --copy-packages-from=0.9 failed"
+
+[ -d ../../v0.9.12 ] || die "nvm install 0.9.12 didn't install"
+
+nvm use 0.9
+node --version | grep v0.9.12 > /dev/null || die "nvm ls 0.9 didn't use v0.9.12"
+
+npm list --global | grep is-nan > /dev/null || die "is-nan isn't installed"
+