my zshrc for iterm2

.zshrc

# enable colors and prompt substitution (so the git_prompt_info function can be used)
autoload -U colors && colors
setopt PROMPT_SUBST

# enable bash-style completions
autoload -Uz compinit
compinit
autoload -U +X bashcompinit && bashcompinit

# define some aliases
alias nom='npm'
alias gco='git checkout'
alias gst='git status'

# style the prompt
function parse_git_dirty() {
  local STATUS=$(git status --porcelain 2> /dev/null | tail -n 1)
  if [[ -n $STATUS ]]; then
    echo "\033[38;5;3m" # yellow
  else
    echo "\033[38;5;49m" # light green
  fi
}

function git_prompt_info() {
  local ref=$(git symbolic-ref --quiet HEAD 2>/dev/null \
           || git rev-parse --short HEAD 2>/dev/null)
  [[ -n $ref ]] || return

  echo "%{$fg[green]%}@$(parse_git_dirty)${ref#refs/heads/}%{$reset_color%}"
}

PROMPT='%{$fg[cyan]%}%c%{$reset_color%}$(git_prompt_info) '

# some hommade functions
mp4() {ffmpeg -i "$1" -crf 18 -threads $(sysctl -n hw.ncpu) -preset veryslow -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" "${1%.*}.mp4"}
mp42() {ffmpeg -i "$1" -crf 18 -threads $(sysctl -n hw.ncpu) -preset veryslow -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" "${1%.*}_2.mp4"}
mp41080() {ffmpeg -i "$1" -crf 18 -threads $(sysctl -n hw.ncpu) -preset veryslow -vf "zscale=width='min(1920,iw)':height=-2:filter=lanczos" "${1%.*}_1080.mp4"}
mp41080low() {ffmpeg -i "$1" -crf 24 -threads $(sysctl -n hw.ncpu) -preset veryslow -vf "zscale=width='min(1920,iw)':height=-2:filter=lanczos" "${1%.*}_1080_low.mp4"}
mp41080lowest() {ffmpeg -i "$1" -crf 28 -threads $(sysctl -n hw.ncpu) -preset veryslow -vf "zscale=width='min(1920,iw)':height=-2:filter=lanczos" "${1%.*}_1080_low.mp4"}
mp4720() {ffmpeg -i "$1" -crf 18 -threads $(sysctl -n hw.ncpu) -preset veryslow -vf "zscale=width='min(1280,iw)':height=-2:filter=lanczos" "${1%.*}_720.mp4"}
mp4720low() {ffmpeg -i "$1" -crf 24 -threads $(sysctl -n hw.ncpu) -preset veryslow -vf "zscale=width='min(1280,iw)':height=-2:filter=lanczos" "${1%.*}_720.mp4"}
mp4720lowest() {ffmpeg -i "$1" -crf 28 -threads $(sysctl -n hw.ncpu) -preset veryslow -vf "zscale=width='min(1280,iw)':height=-2:filter=lanczos" "${1%.*}_720_low.mp4"}
mp4med() {ffmpeg -i "$1" -crf 22 -threads $(sysctl -n hw.ncpu) -preset veryslow "${1%.*}.mp4"}
mp4low() {ffmpeg -i "$1" -crf 26 -threads $(sysctl -n hw.ncpu) -preset veryslow "${1%.*}.mp4"}
h264() {ffmpeg -i "$1" -crf 18 -threads $(sysctl -n hw.ncpu) -preset veryslow "${1%.*}_h264.mp4"}
mp4tiny() {ffmpeg -i "$1" -crf 32 -threads $(sysctl -n hw.ncpu) -preset veryslow "${1%.*}_tiny.mp4"}
h265() {ffmpeg -i "$1" -c:v libx265 -crf 24 -threads $(sysctl -n hw.ncpu) -preset slow "${1%.*}_h265.mp4"}
h265720() {ffmpeg -i "$1" -c:v libx265 -crf 24 -threads $(sysctl -n hw.ncpu) -preset slow -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" "${1%.*}_h265.mp4"}
h265low() {ffmpeg -i "$1" -c:v libx265 -crf 32 -threads $(sysctl -n hw.ncpu) -preset veryslow "${1%.*}_h265.mp4"}
forcekill() {kill -9 $(ps -A | grep -i "$1" | cut -d ' ' -f 1)}
clean_branches() {git remote prune origin && (git branch -vv | grep 'origin/.*: gone]' | awk '{print $1}' | xargs git branch -d)}

get_seconds_from_string() {
  TIME="0"
  TIME_PARTS=$1
  SECONDS_FACTORS=("3600" "60" "1" "0.033")
  IFS=':' read -rA TIME_PARTS <<< "${1}"
  for i in {1..$#TIME_PARTS}; do
    TIME_PART=${TIME_PARTS[$i]}
    TIME=$(bc -l <<< "${TIME}+${TIME_PART}*${SECONDS_FACTORS[$i]}")
  done
  echo -n "${TIME}"
}

vcut() {
  base_filename="${1%.*}"
  file_extension="${1##*.}"
  start_time="${2}"

  start_time_seconds=$(get_seconds_from_string "$2")
  end_time_seconds=$(get_seconds_from_string "$3")
  duration_seconds=$(bc -l <<< "${end_time_seconds}-${start_time_seconds}")
  start_time_name=$(echo "${start_time//;/_}")

  ffmpeg -hide_banner -y -ss ${start_time_seconds} -i "$1" -to ${duration_seconds} -c copy "${base_filename}_${start_time_name}.${file_extension}"
  echo "${base_filename}_${start_time_name}.${file_extension}"
}