Add undocumented `nvm debug` to print out helpful debugging info.
diff --git a/nvm.sh b/nvm.sh
index 34d8562..0c81278 100755
--- a/nvm.sh
+++ b/nvm.sh
@@ -1141,6 +1141,17 @@
echo
;;
+ "debug" )
+ echo >&2 "\$SHELL: $SHELL"
+ echo >&2 "\$NVM_DIR: $(echo $NVM_DIR | sed "s#$HOME#\$HOME#g")"
+ for NVM_DEBUG_COMMAND in 'nvm current' 'which node' 'which iojs' 'which npm' 'npm config get prefix' 'npm root -g'
+ do
+ local NVM_DEBUG_OUTPUT="$($NVM_DEBUG_COMMAND | sed "s#$NVM_DIR#\$NVM_DIR#g")"
+ echo >&2 "$NVM_DEBUG_COMMAND: ${NVM_DEBUG_OUTPUT}"
+ done
+ return 42
+ ;;
+
"install" | "i" )
local nobinary
local version_not_provided