gistfile1.txt

#!/bin/zsh

readonly local format=(
  '%(if)%(HEAD)%(then)1%(else)0%(end)' # is current (0|1)
  '0' # is topic branch (0|1)
  '0' # is gone (0|1)
  '%(refname:short)' # branch name
  '%(color:bold black)%(subject)%(color:reset)' # commit message
  '%(color:bold black)%(upstream:track)%(color:reset)' # upstream status (e.g. [ahead 1], [behind 40], [gone])
)

git branch --color=always -v --format ${(pj:\t:)format} \
  | awk -F $'\t' '
      BEGIN {
        OFS="\t"
      }

      # "[ahead 1, behind 40]" "feat: Implement xxx"
      # 👇
      # "feat: Implement xxx [ahead 1, behind 40]"
      {
        $5=$5 " " $6
      }

      # if current branch
      $1 == 1 {
        # colorize green
        $4="\x1b[32m" $4 "\x1b[m"
      }

      # if branch name contains "/" (i.e. is topic branch?)
      $4 ~ /\// {
        $2=1
      }

      # if upstream status contains "gone"
      $6 ~ /gone/ {
        $3=1
        # colorize magenta and draw strikethrough
        $4="\x1b[9;35m" $4 "\x1b[m"
      }

      {
        print $0
      }
    ' \
  | sort -t $'\t' -k1r,1 -k3,3 -k2,2 -k4,4 \
  | cut -d$'\t' -f4,5 \
  | column -ts $'\t' -o ' ' \
  | emojify