Allow nvm-exec to be linked into individual .nvm directories for system-wide installs with a localized Nodes.

Let's say we have nvm installed in a separate mount, /.socket. NVM_DIR is $HOME/.nvm in /etc/profile.d/nvm.sh. With this setup, users can install Node versions to their home directories without each installing nvm.

nvm install --lts

This works fine as does nvm use --lts. When nvm exec is used though, it fails because it looks for nvm-exec in $NVM_DIR. First fix is to look for nvm-exec in $NVM_DIR. If NVM_DIR does not contain nvm-exec, check $BASH_SOURCE[0]. The second fix is to follow nvm-exec if a symbolic link to determine the proper location of nvm's home. Alternatively we could use a second environment variable, NVM_HOME in exec instead of relying on the directory name of nvm-exec.

Author: msaladna

nvm-exec

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-DIR="$(command cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+DIR="$(dirname $(realpath "${BASH_SOURCE[0]}"))"
 
 unset NVM_CD_FLAGS
 

nvm.sh

@@ -4075,8 +4075,14 @@ nvm() {
           nvm_echo "Running node ${VERSION}$(nvm use --silent "${VERSION}" && nvm_print_npm_version)"
         fi
       fi
-      NODE_VERSION="${VERSION}" "${NVM_DIR}/nvm-exec" "$@"
+
+      NVM_EXEC="${NVM_DIR}/nvm-exec"
+      if [ ! -f "${NVM_EXEC}" ]; then
+        NVM_EXEC=`dirname ${BASH_SOURCE[0]-}`/nvm-exec
+      fi
+      NODE_VERSION="${VERSION}" "${NVM_EXEC}" "$@"
     ;;
+
     "ls" | "list")
       local PATTERN
       local NVM_NO_COLORS