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Cheat Sheet

A quick cheat sheet for my configuration, and for poorly-documented syntax I use often.

git

Make sure to always ignore the following patterns in a repository:

  • .env
  • .envrc
  • .direnv
  • *.code-workspace
  • .vscode
  • *.sw[p]

dotdrop

dotdrop relies on jinja template syntax, but alters the symbols for some ungodly reason. It also adds some helper functions, which are nice, but difficult to find.

Header:

  • {{@@ header() @@}}
  • Simple string to convey that dotdrop manages the file. Typically placed in front of a comment token.

Template Syntax

Variable insertion with no control flow:

  • {{@@ var @@}}

Control flow statements:

  • {%@@ if bool_statement @@%}
  • {%@@ elif bool_statement @@%}
  • {%@@ else @@%}
  • {%@@ endif @@%}

Logical operators to be used inside evaluated statements:

  • or
  • and

Helper variables:

  • env['VAR']
    • Accesses the environment variables
    • ex. env['HOME']

Helper functions:

  • exists_in_path('command')
    • Bool statement, indicates whether or not the command can be found in the 'PATH' environment variable.
    • ex. {%@@ if exists_in_path('git')@@%}
  • is defined
    • Syntactic sugar for returning a bool if a variable is defined or not.
    • ex. {%@@ if env['HOME'] is defined @@%}
  • exists('file')
    • Bool statement that indicates whether a file or folder exists in the filesystem.
    • ex. {%@@ if exists('$HOME/.cargo/bin') @@%}

tmux

prefix is Ctrl a

C-* is Ctrl + *

prefix + h and prefix + C-h: select pane on the left

prefix + j and prefix + C-j: select pane below the current one

prefix + k and prefix + C-k: select pane above

prefix + l and prefix + C-l: select pane on the right

prefix + shift + h: resize current pane 5 cells to the left

prefix + shift + j: resize 5 cells in the down direction

prefix + shift + k: resize 5 cells in the up direction

prefix + shift + l: resize 5 cells to the right

prefix + |: split current pane horizontally

prefix + -: split current pane vertically

prefix + \: split current pane full width horizontally

prefix + _: split current pane full width vertically

prefix + < : moves current window one position to the left

prefix + > : moves current window one position to the right

prefix + I: installs new plugins from GitHub or any other git repository. Refreshes TMUX environment prefix + U: updates plugin(s) prefix + alt + u: remove/uninstall plugins not on the plugin list

vim

\: leader character

direnv

Export an alias by using the bash function `export_alias command_name "bash command"

python

pretty_errors

With the python -m pretty_errors command, one can add pretty_errors to the default python startup scripts. Recommend adding the startup script into the conda environment folder (not the user's home directory), with a user-level setup (not system level).