add eternal history to zsh where already present (#14)

* add eternal history to zsh where already present

* correct zsh history settings

.devcontainer/features/bash-config/config/onCreateCommand.sh

@@ -9,8 +9,10 @@ cp $CONFIG_STAGING/bash-config-rc $CONFIG_FOLDER
 if [[ ! -f $CONFIG_FOLDER/bashrc ]] ; then
     cp $CONFIG_STAGING/bashrc $CONFIG_FOLDER
     cp $CONFIG_STAGING/inputrc $CONFIG_FOLDER
+    cp $CONFIG_STAGING/zshrc $CONFIG_FOLDER
 fi
 
 # hook in the config to the root account
 ln -fs $CONFIG_FOLDER/inputrc /root/.inputrc
-echo "source $CONFIG_FOLDER/bashrc" >> /root/.bashrc
+echo "source $CONFIG_FOLDER/bashrc" >> /root/.bashrc
+echo "source $CONFIG_FOLDER/zshrc" >> /root/.zshrc

.devcontainer/features/bash-config/config/zshrc

@@ -0,0 +1,15 @@
+# This zshrc will be source from /root/.zshrc upon launch of every terminal
+# in a devcontainer that uses the bash-config feature from
+# https://github.com/DiamondLightSource/devcontainer-features
+
+# This file is initialized by vscode feature bash-config,
+# but you are then free to edit it
+
+# set up eternal history for zsh
+HISTCONTROL=ignoreboth:erasedups
+HISTSIZE=10000000
+SAVEHIST=$HISTSIZE
+HISTFILE=$CONFIG_FOLDER/.zsh_eternal_history
+
+# set a theme compatible with vscode terminals
+ZSH_THEME="dst"