Add denter command to enter into Docker container by ID.

.bash_profile

@@ -87,8 +87,8 @@ fi
 export PATH="$brew_prefix/opt/php56/bin:$PATH"
 
 # Use nvm.
-export NVM_DIR="$HOME/.nvm"
+#export NVM_DIR="$HOME/.nvm"
-. "$brew_prefix/opt/nvm/nvm.sh"
+#. "$brew_prefix/opt/nvm/nvm.sh"
 
 # Use rbenv.
 if [ -f /usr/local/bin/rbenv ]; then
@@ -107,6 +107,17 @@ dockrun() {
   docker run -it geerlingguy/docker-"${1:-ubuntu1604}"-ansible /bin/bash
 }
 
+# Enter a running Docker container.
+function denter() {
+  if [[ ! "$1" ]] ; then
+      echo "You must supply a container ID or name."
+      return 0
+  fi
+
+  docker exec -it $1 bash
+  return 0
+}
+
 # Delete a given line number in the known_hosts file.
 knownrm() {
   re='^[0-9]+$'
@@ -145,6 +156,7 @@ function blt() {
     $GIT_ROOT/vendor/bin/blt "$@"
   else
     echo "You must run this command from within a BLT-generated project repository."
-    exit 1
+    return 1
   fi
 }
+