add zsh

2 files changed, 61 insertions, 0 deletions

diff --git a/oh-my-zsh/plugins/last-working-dir/README.md b/oh-my-zsh/plugins/last-working-dir/README.md
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+# last-working-dir plugin
+
+Keeps track of the last used working directory and automatically jumps into it
+for new shells, unless the starting directory is not `$HOME`.
+
+Also adds a `lwd` function to jump to the last working directory.
+
+To use it, add `last-working-dir` to the plugins array in your zshrc file:
+
+```zsh
+plugins=(... last-working-dir)
+```
+
+## Features
+
+### Use separate last-working-dir files with different SSH keys
+
+If the same user account is used by multiple users connecting via different SSH keys, you can
+configure SSH to map them to different `SSH_USER`s and the plugin will use separate lwd files
+for each one.
+
+Make sure that your SSH server allows environment variables. You can enable this feature
+within the `/etc/sshd/sshd_config` file:
+
+```
+PermitUserEnvironment yes
+```
+
+Then, add `environment="SSH_USER=<SSH_USERNAME>"` before the SSH keys in your `authorized_keys` file:
+
+```
+environment="SSH_USER=a.test@example.com" ssh-ed25519 AAAAC3Nz...
+```
diff --git a/oh-my-zsh/plugins/last-working-dir/last-working-dir.plugin.zsh b/oh-my-zsh/plugins/last-working-dir/last-working-dir.plugin.zsh
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+++ b/oh-my-zsh/plugins/last-working-dir/last-working-dir.plugin.zsh
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+# Flag indicating if we've previously jumped to last directory
+typeset -g ZSH_LAST_WORKING_DIRECTORY
+
+# Updates the last directory once directory is changed
+autoload -U add-zsh-hook
+add-zsh-hook chpwd chpwd_last_working_dir
+chpwd_last_working_dir() {
+  # Don't run in subshells
+  [[ "$ZSH_SUBSHELL" -eq 0 ]] || return 0
+  # Add ".$SSH_USER" suffix to cache file if $SSH_USER is set and non-empty
+  local cache_file="$ZSH_CACHE_DIR/last-working-dir${SSH_USER:+.$SSH_USER}"
+  builtin pwd >| "$cache_file"
+}
+
+# Changes directory to the last working directory
+lwd() {
+  # Add ".$SSH_USER" suffix to cache file if $SSH_USER is set and non-empty
+  local cache_file="$ZSH_CACHE_DIR/last-working-dir${SSH_USER:+.$SSH_USER}"
+  [[ -r "$cache_file" ]] && cd "$(cat "$cache_file")"
+}
+
+# Jump to last directory automatically unless:
+# - this isn't the first time the plugin is loaded
+# - it's not in $HOME directory
+[[ -n "$ZSH_LAST_WORKING_DIRECTORY" ]] && return
+[[ "$PWD" != "$HOME" ]] && return
+
+lwd 2>/dev/null && ZSH_LAST_WORKING_DIRECTORY=1 || true