1 files changed, 108 insertions, 0 deletions
diff --git a/oh-my-zsh/plugins/ssh-agent/ssh-agent.plugin.zsh b/oh-my-zsh/plugins/ssh-agent/ssh-agent.plugin.zsh
new file mode 100644
index 0000000..78ac46b
--- /dev/null
+++ b/oh-my-zsh/plugins/ssh-agent/ssh-agent.plugin.zsh
@@ -0,0 +1,108 @@
+# Get the filename to store/lookup the environment from
+ssh_env_cache="$HOME/.ssh/environment-$SHORT_HOST"
+
+function _start_agent() {
+  # Check if ssh-agent is already running
+  if [[ -f "$ssh_env_cache" ]]; then
+    . "$ssh_env_cache" > /dev/null
+
+    # Test if $SSH_AUTH_SOCK is visible
+    zmodload zsh/net/socket
+    if [[ -S "$SSH_AUTH_SOCK" ]] && zsocket "$SSH_AUTH_SOCK" 2>/dev/null; then
+      return 0
+    fi
+  fi
+
+  # Set a maximum lifetime for identities added to ssh-agent
+  local lifetime
+  zstyle -s :omz:plugins:ssh-agent lifetime lifetime
+
+  # start ssh-agent and setup environment
+  zstyle -t :omz:plugins:ssh-agent quiet || echo >&2 "Starting ssh-agent ..."
+  ssh-agent -s ${lifetime:+-t} ${lifetime} | sed '/^echo/d' >! "$ssh_env_cache"
+  chmod 600 "$ssh_env_cache"
+  . "$ssh_env_cache" > /dev/null
+}
+
+function _add_identities() {
+  local id file line sig lines
+  local -a identities loaded_sigs loaded_ids not_loaded
+  zstyle -a :omz:plugins:ssh-agent identities identities
+
+  # check for .ssh folder presence
+  if [[ ! -d "$HOME/.ssh" ]]; then
+    return
+  fi
+
+  # add default keys if no identities were set up via zstyle
+  # this is to mimic the call to ssh-add with no identities
+  if [[ ${#identities} -eq 0 ]]; then
+    # key list found on `ssh-add` man page's DESCRIPTION section
+    for id in id_rsa id_dsa id_ecdsa id_ed25519 identity; do
+      # check if file exists
+      [[ -f "$HOME/.ssh/$id" ]] && identities+=($id)
+    done
+  fi
+
+  # get list of loaded identities' signatures and filenames
+  if lines=$(ssh-add -l); then
+    for line in ${(f)lines}; do
+      loaded_sigs+=${${(z)line}[2]}
+      loaded_ids+=${${(z)line}[3]}
+    done
+  fi
+
+  # add identities if not already loaded
+  for id in $identities; do
+    # if id is an absolute path, make file equal to id
+    [[ "$id" = /* ]] && file="$id" || file="$HOME/.ssh/$id"
+    # check for filename match, otherwise try for signature match
+    if [[ ${loaded_ids[(I)$file]} -le 0 ]]; then
+      sig="$(ssh-keygen -lf "$file" | awk '{print $2}')"
+      [[ ${loaded_sigs[(I)$sig]} -le 0 ]] && not_loaded+=("$file")
+    fi
+  done
+
+  # abort if no identities need to be loaded
+  if [[ ${#not_loaded} -eq 0 ]]; then
+    return
+  fi
+
+  # pass extra arguments to ssh-add
+  local args
+  zstyle -a :omz:plugins:ssh-agent ssh-add-args args
+
+  # if ssh-agent quiet mode, pass -q to ssh-add
+  zstyle -t :omz:plugins:ssh-agent quiet && args=(-q $args)
+
+  # use user specified helper to ask for password (ksshaskpass, etc)
+  local helper
+  zstyle -s :omz:plugins:ssh-agent helper helper
+
+  if [[ -n "$helper" ]]; then
+    if [[ -z "${commands[$helper]}" ]]; then
+      echo >&2 "ssh-agent: the helper '$helper' has not been found."
+    else
+      SSH_ASKPASS="$helper" ssh-add "${args[@]}" ${^not_loaded} < /dev/null
+      return $?
+    fi
+  fi
+
+  ssh-add "${args[@]}" ${^not_loaded}
+}
+
+# Add a nifty symlink for screen/tmux if agent forwarding is enabled
+if zstyle -t :omz:plugins:ssh-agent agent-forwarding \
+   && [[ -n "$SSH_AUTH_SOCK" && ! -L "$SSH_AUTH_SOCK" ]]; then
+  ln -sf "$SSH_AUTH_SOCK" /tmp/ssh-agent-$USERNAME-screen
+else
+  _start_agent
+fi
+
+# Don't add identities if lazy-loading is enabled
+if ! zstyle -t :omz:plugins:ssh-agent lazy; then
+  _add_identities
+fi
+
+unset agent_forwarding ssh_env_cache
+unfunction _start_agent _add_identities