make tmux module have optional attach behavior

This commit reverts the tmux module back to the original behavior but
doesn't set `destroy-unattached` to on `on` globally and provides an
option for attaching to the background or last-used session.

modules/git/functions/git-info

@@ -348,13 +348,13 @@ function git-info {
     # Format added.
     if (( added > 0 )); then
       zstyle -s ':prezto:module:git:info:added' format 'added_format'
-      zformat -f added_formatted "$added_format" "a:$added_format"
+      zformat -f added_formatted "$added_format" "a:$added"
     fi
 
     # Format deleted.
     if (( deleted > 0 )); then
       zstyle -s ':prezto:module:git:info:deleted' format 'deleted_format'
-      zformat -f deleted_formatted "$deleted_format" "d:$deleted_format"
+      zformat -f deleted_formatted "$deleted_format" "d:$deleted"
     fi
 
     # Format modified.

modules/python/init.zsh

@@ -16,9 +16,12 @@ elif (( $+commands[pyenv] )); then
   eval "$(pyenv init -)"
 
 # Prepend PEP 370 per user site packages directory, which defaults to
-# ~/Library/Python on Mac OS X and ~/.local elsewhere, to PATH.
+# ~/Library/Python on Mac OS X and ~/.local elsewhere, to PATH. The
+# path can be overridden using PYTHONUSERBASE.
 else
-  if [[ "$OSTYPE" == darwin* ]]; then
+  if [[ -n "$PYTHONUSERBASE" ]]; then
+    path=($PYTHONUSERBASE/bin $path)
+  elif [[ "$OSTYPE" == darwin* ]]; then
     path=($HOME/Library/Python/*/bin(N) $path)
   else
     # This is subject to change.

modules/screen/init.zsh

@@ -15,7 +15,7 @@ fi
 # Auto Start
 #
 
-if [[ -z "$STY" && ( -z "$INSIDE_EMACS" || -z "$EMACS" || -z "$VIM" ) ]] && ( \
+if [[ -z "$STY" && -z "$EMACS" && -z "$VIM" ]] && ( \
   ( [[ -n "$SSH_TTY" ]] && zstyle -t ':prezto:module:screen:auto-start' remote ) ||
   ( [[ -z "$SSH_TTY" ]] && zstyle -t ':prezto:module:screen:auto-start' local ) \
 ); then

modules/tmux/README.md

@@ -20,12 +20,25 @@ following line to *zpreztorc*:
 
     zstyle ':prezto:module:tmux:auto-start' remote 'yes'
 
-In both cases, it will create a background session named _#Prezto_ and attach
+In both cases the tmux server will be started and a background session
-every new shell to it.
+named _prezto_ will be created if a session doesn't already exist.
+
+By default every shell shares a set of windows but has an independent
+view. Detaching from one of these sessions removes the view but the
+open windows persist. This is accomplished by setting the
+`destroy-unattached` option to `on` for each session.
+
+Some users prefer that all new shells share the same session so that
+the view for each shell is in sync. This useful for advanced users
+that create multiple sessions and want to manually navigate between
+them. To accomplish this behavior set the `mode` option to `shared` in
+*zpreztorc*,
+
+    zstyle ':prezto:module:tmux:auto-start' mode shared
+
+You can customize the background session by creating a new session in
+your `.tmux.conf` file.
 
-To avoid keeping open sessions, this module sets `destroy-unattached off` on
-the background session and `destroy-unattached on` on every other session
-(global setting).
 
 Aliases
 -------
@@ -41,7 +54,7 @@ connected** to be displayed, which can be fixed by installing
 [reattach-to-user-namespace][3], available in [Homebrew][4], and adding the
 following to *tmux.conf*:
 
-   set-option -g default-command "reattach-to-user-namespace -l $SHELL -l"
+    set-option -g default-command "reattach-to-user-namespace -l $SHELL -l"
 
 Furthermore, tmux is known to cause **kernel panics** on Mac OS X. A discussion
 about this and Prezto has already been [opened][2].
@@ -54,6 +67,7 @@ Authors
   - [Sorin Ionescu](https://github.com/sorin-ionescu)
   - [Colin Hebert](https://github.com/ColinHebert)
   - [Georges Discry](https://github.com/gdiscry)
+  - [Xavier Cambar](https://github.com/xcambar)
 
 [1]: http://tmux.sourceforge.net
 [2]: https://github.com/sorin-ionescu/prezto/issues/62

modules/tmux/init.zsh

@@ -5,6 +5,7 @@
 #   Sorin Ionescu <sorin.ionescu@gmail.com>
 #   Colin Hebert <hebert.colin@gmail.com>
 #   Georges Discry <georges@discry.be>
+#   Xavier Cambar <xcambar@gmail.com>
 #
 
 # Return if requirements are not found.
@@ -16,31 +17,29 @@ fi
 # Auto Start
 #
 
-if [[ -z "$TMUX" && ( -z "$INSIDE_EMACS" || -z "$EMACS" || -z "$VIM" ) ]] && ( \
+if [[ -z "$TMUX" && -z "$EMACS" && -z "$VIM" ]] && ( \
   ( [[ -n "$SSH_TTY" ]] && zstyle -t ':prezto:module:tmux:auto-start' remote ) ||
   ( [[ -z "$SSH_TTY" ]] && zstyle -t ':prezto:module:tmux:auto-start' local ) \
 ); then
-  tmux_session='prezto'
+  tmux start-server
 
-  if ! tmux has-session -t "$tmux_session" 2> /dev/null; then
+  # Create a 'prezto' session if no session has been defined in tmux.conf.
-    # Ensure that tmux server is started.
+  if ! tmux has-session 2> /dev/null; then
-    tmux start-server
+    tmux \
-
+      new-session -d -s prezto \; \
-    # Disable the destruction of unattached sessions globally.
+      set-option -t prezto destroy-unattached off &> /dev/null
-    tmux set-option -g destroy-unattached off &> /dev/null
+  else
-
+    tmux_session
-    # Create a new session.
-    tmux new-session -d -s "$tmux_session"
-
-    # Disable the destruction of the new, unattached session.
-    tmux set-option -t "$tmux_session" destroy-unattached off &> /dev/null
-
-    # Enable the destruction of unattached sessions globally to prevent
-    # an abundance of open, detached sessions.
-    tmux set-option -g destroy-unattached on &> /dev/null
   fi
 
-  exec tmux new-session -t "$tmux_session"
+  if zstyle -t ':prezto:module:tmux:auto-start' mode shared; then
+      # Attach to the 'prezto' session or to the last session used.
+      exec tmux attach
+  else
+      # Find a session to share windows with.
+      tmux_session=`tmux list-sessions -F '#S' | head -n 1`
+      exec tmux new-session -t "$tmux_session"\; set-option destroy-unattached on
+  fi
 fi
 
 #

runcoms/zpreztorc

@@ -152,4 +152,3 @@ zstyle ':prezto:module:prompt' theme 'sorin'
 
 # Auto start a session when Zsh is launched in a SSH connection.
 # zstyle ':prezto:module:tmux:auto-start' remote 'yes'
-