[#23] Rename plugins to modules

modules/ssh-agent/init.zsh

@@ -0,0 +1,68 @@
+#
+# Provides for an easier use of ssh-agent.
+#
+# Authors:
+#   Robby Russell <robby@planetargon.com>
+#   Theodore Robert Campbell Jr <trcjr@stupidfoot.com>
+#   Joseph M. Reagle Jr. <reagle@mit.edu>
+#   Florent Thoumie <flz@xbsd.org>
+#   Jonas Pfenniger <jonas@pfenniger.name>
+#   gwjo <gowen72@gmail.com>
+#   Sorin Ionescu <sorin.ionescu@gmail.com>
+#
+# Usage:
+#   To enable agent forwarding, add the following to your .zshrc:
+#
+#     zstyle ':omz:module:ssh-agent' forwarding 'yes'
+#
+#   To load multiple identities, add the following to your .zshrc:
+#
+#     zstyle ':omz:module:ssh-agent' identities 'id_rsa' 'id_rsa2' 'id_github'
+#
+
+if (( ! $+commands[ssh-agent] )); then
+  return 1
+fi
+
+_ssh_agent_env="${HOME}/.ssh/environment-${HOST}"
+_ssh_agent_forwarding=
+
+function _ssh-agent-start {
+  local -a identities
+
+  # Start ssh-agent and setup the environment.
+  rm -f "${_ssh_agent_env}"
+  ssh-agent > "${_ssh_agent_env}"
+  chmod 600 "${_ssh_agent_env}"
+  source "${_ssh_agent_env}" > /dev/null
+
+  # Load identities.
+  zstyle -a ':omz:module:ssh-agent' identities 'identities'
+
+  if (( ${#identities} > 0 )); then
+    ssh-add "${HOME}/.ssh/${^identities[@]}"
+  else
+    ssh-add
+  fi
+}
+
+# Test if agent-forwarding is enabled.
+zstyle -b ':omz:module:ssh-agent' forwarding '_ssh_agent_forwarding'
+if is-true "${_ssh_agent_forwarding}" && [[ -n "$SSH_AUTH_SOCK" ]]; then
+  # Add a nifty symlink for screen/tmux if agent forwarding.
+  [[ -L "$SSH_AUTH_SOCK" ]] || ln -sf "$SSH_AUTH_SOCK" /tmp/ssh-agent-$USER-screen
+elif [ -f "${_ssh_agent_env}" ]; then
+  # Source SSH settings, if applicable.
+  source "${_ssh_agent_env}" > /dev/null
+  ps -ef | grep "${SSH_AGENT_PID}" | grep -q 'ssh-agent$' || {
+    _ssh-agent-start;
+  }
+else
+  _ssh-agent-start;
+fi
+
+# Tidy up after ourselves.
+unfunction _ssh-agent-start
+unset _ssh_agent_forwarding
+unset _ssh_agent_env
+