Make vterm and zsh play nice

emacs/.emacs.d/config/init-vterm.el

@@ -6,7 +6,12 @@
     (if (projectile-project-root)
         (call-interactively #'projectile-run-vterm)
       (call-interactively #'vterm)))
+  :config
+  (evil-collection-vterm-setup)
   :general
-  (leader-map "v" #'project-vterm))
+  (leader-map "v" #'project-vterm)
+  :custom
+  (vterm-environment '("TYPEWRITTEN_CURSOR=terminal"))
+  (vterm-ignore-blink-cursor t))
 
 (provide 'init-vterm)

zsh/.zshrc

@@ -4,21 +4,7 @@
 # Path to your oh-my-zsh installation.
 export ZSH="$HOME/.oh-my-zsh"
 
-# Load up typewritten theme if it exists
-if [[ -d "$HOME/typewritten" ]]
-then
-    export TYPEWRITTEN_CURSOR="terminal"
-    fpath+=$HOME/typewritten
-    autoload -U promptinit; promptinit
-    prompt typewritten
-    ZSH_THEME=""
-else
-    # Set name of the theme to load --- if set to "random", it will
-    # load a random theme each time oh-my-zsh is loaded, in which case,
-    # to know which specific one was loaded, run: echo $RANDOM_THEME
-    # See https://github.com/ohmyzsh/ohmyzsh/wiki/Themes
-    ZSH_THEME="robbyrussell"
-fi
+ZSH_THEME="typewritten"
 
 # Set list of themes to pick from when loading at random
 # Setting this variable when ZSH_THEME=random will cause zsh to load
@@ -80,7 +66,7 @@ fi
 # Custom plugins may be added to $ZSH_CUSTOM/plugins/
 # Example format: plugins=(rails git textmate ruby lighthouse)
 # Add wisely, as too many plugins slow down shell startup.
-plugins=(git direnv pyenv)
+plugins=(git direnv pyenv npm nvm)
 
 source $ZSH/oh-my-zsh.sh
 
@@ -114,3 +100,59 @@ alias k="kubectl"
 alias kns="kubens"
 alias kctx="kubectx"
 alias tf="terraform"
+
+# VTerm integration
+# Some of the most useful features in emacs-libvterm require shell-side
+# configurations. The main goal of these additional functions is to enable the
+# shell to send information to `vterm` via properly escaped sequences. A
+# function that helps in this task, `vterm_printf`, is defined below.
+
+function vterm_printf(){
+    if [ -n "$TMUX" ] && ([ "${TERM%%-*}" = "tmux" ] || [ "${TERM%%-*}" = "screen" ] ); then
+        # Tell tmux to pass the escape sequences through
+        printf "\ePtmux;\e\e]%s\007\e\\" "$1"
+    elif [ "${TERM%%-*}" = "screen" ]; then
+        # GNU screen (screen, screen-256color, screen-256color-bce)
+        printf "\eP\e]%s\007\e\\" "$1"
+    else
+        printf "\e]%s\e\\" "$1"
+    fi
+}
+
+# Completely clear the buffer. With this, everything that is not on screen
+# is erased.
+if [[ "$INSIDE_EMACS" = 'vterm' ]]; then
+    alias clear='vterm_printf "51;Evterm-clear-scrollback";tput clear'
+fi
+
+# With vterm_cmd you can execute Emacs commands directly from the shell.
+# For example, vterm_cmd message "HI" will print "HI".
+# To enable new commands, you have to customize Emacs's variable
+# vterm-eval-cmds.
+vterm_cmd() {
+    local vterm_elisp
+    vterm_elisp=""
+    while [ $# -gt 0 ]; do
+        vterm_elisp="$vterm_elisp""$(printf '"%s" ' "$(printf "%s" "$1" | sed -e 's|\\|\\\\|g' -e 's|"|\\"|g')")"
+        shift
+    done
+    vterm_printf "51;E$vterm_elisp"
+}
+
+# This is to change the title of the buffer based on information provided by the
+# shell. See, http://tldp.org/HOWTO/Xterm-Title-4.html, for the meaning of the
+# various symbols.
+autoload -U add-zsh-hook
+add-zsh-hook -Uz chpwd (){ print -Pn "\e]2;%m:%2~\a" }
+
+# Sync directory and host in the shell with Emacs's current directory.
+# You may need to manually specify the hostname instead of $(hostname) in case
+# $(hostname) does not return the correct string to connect to the server.
+#
+# The escape sequence "51;A" has also the role of identifying the end of the
+# prompt
+vterm_prompt_end() {
+    vterm_printf "51;A$(whoami)@$(hostname):$(pwd)";
+}
+setopt PROMPT_SUBST
+PROMPT=$PROMPT'%{$(vterm_prompt_end)%}'