.bashrc

##
# ~/.bashrc -- startup file for bash (interactive non-login)
#
#   author:     Pat Gaffney <pat@hypepat.com>
#
#   This file is loaded when invoking bash as an interactive shell
#   that is *not* a login shell. Because of this behavior, this
#   file is loaded by ~./bash_profile -- effectively making it the
#   startup file for both login and non-login interactive shells.
#
#####################################################################

##
# Shell Options
#
# If any option has both a single character flag (`-x`) *and* a
# option name (`-o option-name`), the option-name is chosen for
# general readability.
#
# Any options that are turned on by *default* are also listed here
# so that they could be easily turned off in the future if needed.
#####################################################################

# Do not exit an interactive shell upon reading EOF.
set -o ignoreeof;

# Report the status of terminated background jobs immediately, 
# rather than before printing the next primary prompt.
set -o notify;

##
# Shell Behavior
#####################################################################

# Executed a directory name as if it were an argument to cd.
shopt -s autocd

# Correct spelling errors in directory names given to cd.
shopt -s cdspell

# Check the hash table for a command name before searching $PATH.
shopt -s checkhash

# Check the window size (update $LINES and $COLUMNS) 
# after each command.
shopt -s checkwinsize

# Save all lines of a multi-line command in the same history entry.
shopt -s cmdhist

# Correct spelling errors on directory names during word completion
# if the directory name initially supplied does not exist.
shopt -s dirspell

# Enable extended pattern matching features.
shopt -s extglob

# Enable `**` pattern in filename expansion to match all files,
# directories and subdirectories.
shopt -s globstar

# Append the history list to $HISTFILE instead of replacing it.
shopt -s histappend

# Save multi-line commands to the history with embedded newlines
# instead of semicolons -- requries cmdhist to be on.
shopt -s lithist

# Do not attempt completions on an empty line.
shopt -s no_empty_cmd_completion

# Case-insensitive filename matching in filename expansion.
shopt -s nocaseglob

# Treat unknown commands as aliases during completion,
# attempt completion from the resulting alias.
shopt -s progcomp_alias

# Make echo builtin expand backslash-escape-sequence.
shopt -s xpg_echo

##
# Environment Variables
#####################################################################

# Set the $PATH -- favor /usr/local/bin.
export PATH="/opt/homebrew/bin:/usr/local/bin:/usr/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/opt:$HOME/code/go/bin:$HOME/.bin:$HOME/.rd/bin"

# Set Sublime Text to be the default editor.
export EDITOR='subl --wait --stay'

# Ignore files with these suffixes when performing completion.
export FIGNORE='.o:.pyc:.git:cache'

# Ignore files that match these patterns when 
# performing filename expansion.
export GLOBIGNORE='.DS_Store:*.o:*.pyc:.git:*cache'

# History file control:
#   - ignorespace = don't save lines that begin with a space
#   - ignoredups  = don't save duplicate lines
export HISTCONTROL='ignorespace:ignoredups'

# Maximum number of lines/commands to save in the history file.
export HISTFILESIZE=1000000
export HISTSIZE=10000

# Ignore the following commands when appending to history.
HISTIGNORE='ls:ll:cd:pwd'

# Prefer US English and use UTF-8.
export LANG='en_US.UTF-8'
export LC_ALL='en_US.UTF-8'

# Set colors for ls command.
#   1.  directory: ex
#   2.  symbolic link: fx
#   3.  socket: gx
#   4.  pipe: bx
#   5.  executable: cx
#   6.  block special: aH
#   7.  character special: aA
#   8.  executable with setuid bit set: cA
#   9.  executable with setgid bit set: cH
#   10. directory writable to others, with sticky bit: eA
#   11. directory writable to others, without sticky bit: eH
export CLICOLOR=1
export LSCOLOR='exfxgxbxcxaHaAcAcHeAeH'

# Set up colors for man pages.
# Stolen from: https://russellparker.me/2018/02/23/adding-colors-to-man/
export MANROFFOPT='-c'
export LESS_TERMCAP_mb=$(tput bold; tput setaf 2)
export LESS_TERMCAP_md=$(tput bold; tput setaf 4)
export LESS_TERMCAP_me=$(tput sgr0)
export LESS_TERMCAP_so=$(tput bold; tput setaf 3; tput setab 1)
export LESS_TERMCAP_se=$(tput rmso; tput sgr0)
export LESS_TERMCAP_us=$(tput smul; tput bold; tput setaf 7)
export LESS_TERMCAP_ue=$(tput rmul; tput sgr0)
export LESS_TERMCAP_mr=$(tput rev)
export LESS_TERMCAP_mh=$(tput dim)

# Correctly set GPG TTY.
export GPG_TTY=$(tty)

# Turn off the homebrew hints.
export HOMEBREW_NO_ENV_HINTS='why'

##
# Python
#####################################################################

# Don't let virtualenv modify the bash prompt -- I will do this.
export VIRTUAL_ENV_DISABLE_PROMPT=1

##
# Go
#####################################################################

export GOPATH="$HOME/code/go"

# Print the outdated go packages. This is intended to work with
# go modules. It only prints patch and minor updates.
alias goout="go list -u -m all"

##
# Node
#####################################################################

# Print the top 15 largest NPM packages.
alias npmsize="du -sh node_modules/* | sort -h -r | head -n 15"

##
# Kubernetes
#####################################################################

# Decode and print a secret.
function k8secret {
    kubectl get secret "$1" -o json | jq -r '.data | to_entries[] | "\(.key) = \(.value | @base64d)"'
}

# Set up color diffs.
export KUBECTL_EXTERNAL_DIFF="colordiff -N -u"

##
# AWS
#####################################################################

# Because, well shit.
# Props to @jskidis, for this stroke of genius.
function aws {
    case $* in
        redshit* )
            shift 1;
            command aws redshift "$@"
        ;;
        * )
            command aws "$@"
        ;;
    esac
}

##
# Postgres
#####################################################################

alias pg_start="pg_ctl -D /usr/local/var/postgres -l /usr/local/var/postgres/server.log start"
alias pg_stop="pg_ctl -D /usr/local/var/postgres stop -s -m fast"

##
# Dates
#####################################################################

# Convert YYYY-MM-DD to YYYYDDD.
function todoy {
    date -j -f '%Y-%m-%d' "$1" '+%Y%j'
}

# Convert YYYYDDD to YYYY-MM-DD.
function fromdoy {
    date -j -f '%Y%j' "$1" '+%Y-%m-%d'
}

##
# Prompt
#####################################################################

# Color the Git branch name based on the status.
function prompt_git_dirty {
    local status
    status=$(git status 2> /dev/null)
    local push='Your branch is ahead'
    local dirty='added to commit'
    local commit='Changes to be committed'
    
    # First check if the repo is dirty.
    if [[ $status =~ ${dirty} ]]; then echo $'\e[1;31m';
        
    # Next check if changes have been staged.
    elif [[ $status =~ ${commit} ]]; then echo $'\e[1;36m';
    
    # Check if its ahead of remote.
    elif [[ $status =~ ${push} ]]; then echo $'\e[1;33m';
    
    # Default to clean.
    else echo $'\e[1;32m';
    fi
}

# Add the Git branch `:[<branch-name>]` to the prompt.
function prompt_git_branch {
    IFS=$'\n'

    local branches
    branches=$(git branch --no-color 2> /dev/null)
    local prefix='\* '
    local string=''

    for branch in $branches; do
        if [[ ${branch} == ${prefix}* ]]; then 
            string+=':['
            string+=$(prompt_git_dirty)
            string+=${branch##$prefix}
            string+=$'\e[0m'
            string+=']'
            break
        fi
    done
    echo "$string"
    unset IFS
}

# Add Kubernetes cluster name `:(<cluster-name>)` to prompt.
function prompt_k8s_cluster {
    local cluster
    local string
    cluster=$(kubectl config current-context 2>/dev/null)

    if [[ ${cluster} == "" || "$?" == "1" ]]; then
        echo ""
    else
        string+=':('
        string+=$'\e[1;33m'
        string+="$cluster"
        string+=$'\e[0m'
        string+=')'
        echo "$string"
    fi
}

# Begin appending information to PS1
export PS1=''

# Add cyan command-number: '\#'
PS1+=$'\[\e[1;36m\]\#.\[\e[0m\] '

# Add bold username: '\u'
PS1+=$'\[\e[1m\]\u\[\e[0m\]'

# Add bold-blue hostname: '\h'
PS1+=$'\[\e[1;34m\]@\h\[\e[0m\]'

# Add current k8s cluster.
PS1+='$(prompt_k8s_cluster) '

# Add red working directory: '\w'
PS1+=$'in \[\e[1;31m\]\w\[\e[0m\]'

# Add git information
PS1+='$(prompt_git_branch) '

# Add magenta time: '\A'
PS1+=$'at \[\e[1;35m\]\A\[\e[0m\]\n'

# Add dollar-sign `$`
PS1+=$'\[\e[1;34m\]$ \[\e[0m\]'

# The number of trailing directory components to retain when adding
# the directory names to the prompt -- trailing directories are
# marked with an `...` ellipsis.
export PROMPT_DIRTRIM=3

##
# Aliases
#
# Set up simple aliases to enable default options for commands.
# For almost every purpose, shell functions are preferred over
# aliases, so some care has been taken to ensure that the alises
# defined here would *not* work better as functions.
#
#####################################################################

# Clear the screen.
alias k="clear"

# List {a}ll files with {h}uman-{s}ize output long.
#   -A = List all entries except for `.` and `..`.
#   -G = Enable colorized output.
#   -h = Use unit suffixes for file size.
#   -l = List in long format, omit group id.
#   -P = List symbolic link, not its reference.
#   -T = Display time information.
alias ll="ls -AGhlTP"

# Go back (1|2) director(y|ies).
alias ..="cd ../"
alias ...="cd ../../"

# Open current directory in Finder.app.
alias finder="open -a Finder ./"

# Put the computer to sleep.
alias nap="pmset sleepnow"

# Get the day of the year as in DDD.
alias doy='date +%j'

##
# Private Configurations
#####################################################################

[[ -s ~/.private ]] && source ~/.private

##
# Bash Completions
#####################################################################

# Set up bash_completion.
if type brew &>/dev/null; then
  HOMEBREW_PREFIX="$(brew --prefix)"

  # Use homebrew script to source all completions.
  if [[ -r "${HOMEBREW_PREFIX}/etc/profile.d/bash_completion.sh" ]]; then
    source "${HOMEBREW_PREFIX}/etc/profile.d/bash_completion.sh"
  # Manually source all completions.
  else
    for COMPLETION in "${HOMEBREW_PREFIX}/etc/bash_completion.d/"*; do
      [[ -r "${COMPLETION}" ]] && source "${COMPLETION}"
    done
  fi
fi

# Set up any custom completions.
if [ -d "$HOME/.completions" ]; then
    for COMPLETION in "$HOME/.completions/"*; do
        [[ -r "${COMPLETION}" ]] && source "${COMPLETION}"
    done
fi