Migrate sorin prompt to zsh-async

.gitmodules

@@ -22,3 +22,6 @@
 [submodule "modules/fasd/external"]
 	path = modules/fasd/external
 	url = https://github.com/clvv/fasd.git
+[submodule "modules/prompt/external/async"]
+	path = modules/prompt/external/async
+	url = https://github.com/mafredri/zsh-async.git

modules/prompt/functions/async

@@ -1 +1 @@
-../external/pure/async.zsh
+../external/async/async.zsh

modules/prompt/functions/prompt_sorin_setup

@@ -32,49 +32,33 @@
 # Load dependencies.
 pmodload 'helper'
 
-prompt_sorin_git_info() {
-  if (( _prompt_sorin_precmd_async_pid > 0 )); then
-    # Append Git status.
-    if [[ -s "$_prompt_sorin_precmd_async_data" ]]; then
-      alias typeset='typeset -g'
-      source "$_prompt_sorin_precmd_async_data"
-      RPROMPT+='${git_info:+${(e)git_info[status]}}'
-      unalias typeset
+function prompt_sorin_git_info {
+  # We can safely split on ':' because it isn't allowed in ref names.
+  IFS=':' read _git_target _git_post_target <<<"$3"
+
+  # The target actually contains 3 space separated possibilities, so we need to
+  # make sure we grab the first one.
+  _git_target=$(coalesce ${(@)${(z)_git_target}})
+
+  if [[ -z "$_git_target" ]]; then
+    # No git target detected, flush the git fragment and redisplay the prompt.
+    if [[ -n "$_prompt_sorin_git" ]]; then
+      _prompt_sorin_git=''
+      zle && zle reset-prompt
     fi
-
-    # Reset PID.
-    _prompt_sorin_precmd_async_pid=0
-
-    # Redisplay prompt.
+  else
+    # Git target detected, update the git fragment and redisplay the prompt.
+    _prompt_sorin_git="${_git_target}${_git_post_target}"
     zle && zle reset-prompt
   fi
 }
 
-function prompt_sorin_precmd_async {
-  # Get Git repository information.
+function prompt_sorin_async_git {
+  cd -q "$1"
   if (( $+functions[git-info] )); then
     git-info
-    ### TODO XXX
-    # This section exists to patch over vulnerabilities when sourcing the
-    # file in $_prompt_sorin_precmd_async_data. Without it if a branch is named
-    # $foo it will expand if we have a $foo variable, and a branch named
-    # $(IFS=_;cmd=rm_-rf_~;$cmd) could delete the users home directory.
-    # This is a stopgap to prevent code execution and fix the vulnerability,
-    # but it eventually needs to be removed in favor of zsh_async and not using
-    # a file to store the prompt data in.
-    ###
-    local tmp_prompt_var=$(typeset -p git_info)
-    # Replace all $ with $\ to escape
-    tmp_prompt_var=${tmp_prompt_var//\$/\\$}
-    # Unescape the first \$ as it's our $( )
-    tmp_prompt_var=${tmp_prompt_var:s/\\$/\$}
-    # Escape all backticks ` to \`
-    tmp_prompt_var=${tmp_prompt_var//\`/\\\`}
-    printf "%s\n" "$tmp_prompt_var" >! "$_prompt_sorin_precmd_async_data"
+    print ${git_info[status]}
   fi
-
-  # Signal completion to parent process.
-  kill -WINCH $$
 }
 
 function prompt_sorin_precmd {
@@ -84,18 +68,21 @@ function prompt_sorin_precmd {
   # Format PWD.
   _prompt_sorin_pwd=$(prompt-pwd)
 
-  # Define prompts.
-  RPROMPT='${editor_info[overwrite]}%(?:: %F{1}⏎%f)${VIM:+" %B%F{6}V%f%b"}'
-
   # Kill the old process of slow commands if it is still running.
-  if (( _prompt_sorin_precmd_async_pid > 0 )); then
-    kill -KILL "$_prompt_sorin_precmd_async_pid" &>/dev/null
+  async_flush_jobs async_sorin_git
+
+  # Handle updating git data. We also clear the git prompt data if we're in a
+  # different git root now.
+  if (( $+functions[git-dir] )); then
+    local new_git_root="$(git-dir 2>/dev/null)"
+    if [[ $new_git_root != $_sorin_cur_git_root ]]; then
+      _prompt_sorin_git=''
+      _sorin_cur_git_root=$new_git_root
+    fi
   fi
 
   # Compute slow commands in the background.
-  trap prompt_sorin_git_info WINCH
-  prompt_sorin_precmd_async &!
-  _prompt_sorin_precmd_async_pid=$!
+  async_job async_sorin_git prompt_sorin_async_git "$PWD"
 }
 
 function prompt_sorin_setup {
@@ -107,6 +94,7 @@ function prompt_sorin_setup {
 
   # Load required functions.
   autoload -Uz add-zsh-hook
+  autoload -Uz async && async
 
   # Add hook for calling git-info before each command.
   add-zsh-hook precmd prompt_sorin_precmd
@@ -133,11 +121,19 @@ function prompt_sorin_setup {
   zstyle ':prezto:module:git:info:unmerged' format ' %%B%F{3}═%f%%b'
   zstyle ':prezto:module:git:info:untracked' format ' %%B%F{7}◼%f%%b'
   zstyle ':prezto:module:git:info:keys' format \
-    'status' '$(coalesce "%b" "%p" "%c")%s%A%B%S%a%d%m%r%U%u'
+    'status' '%b %p %c:%s%A%B%S%a%d%m%r%U%u'
+
+  # Get the async worker set up
+  async_start_worker async_sorin_git -n
+  async_register_callback async_sorin_git prompt_sorin_git_info
+  _sorin_cur_git_root=''
+
+  _prompt_sorin_git=''
+  _prompt_sorin_pwd=''
 
   # Define prompts.
   PROMPT='${SSH_TTY:+"%F{9}%n%f%F{7}@%f%F{3}%m%f "}%F{4}${_prompt_sorin_pwd}%(!. %B%F{1}#%f%b.)${editor_info[keymap]} '
-  RPROMPT=''
+  RPROMPT='${editor_info[overwrite]}%(?:: %F{1}⏎%f)${VIM:+" %B%F{6}V%f%b"}${_prompt_sorin_git}'
   SPROMPT='zsh: correct %F{1}%R%f to %F{2}%r%f [nyae]? '
 }