init

.zprezto/modules/screen/README.md

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+GNU Screen
+==========
+
+Defines [GNU Screen][1] aliases and provides for auto launching it at start-up.
+
+Settings
+--------
+
+### Auto-Start
+
+Starts a GNU Screen session automatically when Zsh is launched.
+
+To enable this feature when launching Zsh in a local terminal, add the
+following line to *zpreztorc*:
+
+    zstyle ':prezto:module:screen:auto-start' local 'yes'
+
+To enable this feature when launching Zsh in a SSH connection, add the
+following line to *zpreztorc*:
+
+    zstyle ':prezto:module:screen:auto-start' remote 'yes'
+
+Aliases
+-------
+
+  - `scr` is short for `screen`.
+  - `scrl` lists sessions/socket directory.
+  - `scrn` starts a new session.
+  - `scrr` attaches to a session if one exists or start a new one.
+
+Authors
+-------
+
+*The authors of this module should be contacted via the [issue tracker][2].*
+
+  - [Sorin Ionescu](https://github.com/sorin-ionescu)
+  - [Georges Discry](https://github.com/gdiscry)
+
+[1]: http://www.gnu.org/software/screen/
+[2]: https://github.com/sorin-ionescu/prezto/issues

.zprezto/modules/screen/init.zsh

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+#
+# Defines GNU Screen aliases and provides for auto launching it at start-up.
+#
+# Authors:
+#   Sorin Ionescu <sorin.ionescu@gmail.com>
+#   Georges Discry <georges@discry.be>
+#
+
+# Return if requirements are not found.
+if (( ! $+commands[screen] )); then
+  return 1
+fi
+
+#
+# Auto Start
+#
+
+if [[ -z "$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
+  session="$(
+    screen -list 2> /dev/null \
+      | sed '1d;$d' \
+      | awk '{print $1}' \
+      | head -1)"
+
+  if [[ -n "$session" ]]; then
+    exec screen -x "$session"
+  else
+    exec screen -a -A -U -D -R -m "$SHELL" -l
+  fi
+fi
+
+#
+# Aliases
+#
+
+alias scr='screen'
+alias scrl='screen -list'
+alias scrn='screen -U -S'
+alias scrr='screen -a -A -U -D -R'