git_functions

#!/bin/bash

git_current_branch() {
  git branch | grep '\*' | tr -d '* '
}
git_diff_inclusive() {
  if [[ "${#}" -eq 0 ]]; then
    git diff HEAD~1..HEAD
  elif [[ "${#}" -ne 1 ]]; then
    echo "Usage: gdi [hash] or gdi [hash1..hash2]"
  elif [[ "${1}" =~ \.\. ]]; then
    git diff "${1/../~1..}"
  else
    git diff "${1}~1..${1}"
  fi
}
git_delete_branch() {
  git branch -d "${1}"
  git push origin :refs/heads/"${1}"
}
git_delete_tag() {
  git tag -d "${1}"
  git push origin :refs/tags/"${1}"
}
git_log_since() {
  git log --decorate --oneline "${1:+${1}~1..}"
}
git_upstream() {
  declare -r local="${1:-$(git_current_branch)}"
  declare -r remote="${2:-origin/${local}}"
  git branch | grep --quiet " ${local}$" \
    && git branch --set-upstream-to="${remote}" "${local}" \
    && return $?
  git branch --track "${local}" "${remote}"
}
git_synchronize() {
    # sync tags
    echo '=== sync tags ==='
    git fetch --tags --all
    # sync remote branches
    echo '=== get branches ==='
    git remote update origin --prune
    # set local branch & upstream for each remote branch
    echo '=== upstream and update ==='
    git branch --remotes | grep --invert-match '\->' | while read -r remote; do
      declare local="${remote#origin/}"
      git_upstream "${local}" "${remote}"
      [[ "${local}" == "$(git_current_branch)" ]] \
        && git pull \
        && continue
      git fetch origin "${local}:${local}"
    done
    # remove local merged branches without a corresponding remote
    echo '=== remove merged ==='
    git branch --merged | while read -r local; do
      git branch --remotes | grep --quiet " origin/${local#* }$" \
        && continue
      git branch --delete --force "${local#* }"
    done
    # update submodules
    echo '=== update submodules ==='
    git submodule update --init --recursive
    # git push
    echo '=== push all branches and tags ==='
    git push --all
    git push --tags
}

alias gfi='gf --init'
alias gdi='git_diff_inclusive'
alias gdb='git_delete_branch'
alias gdt='git_delete_tag'
alias gls='git_log_since'
alias gup='git_upstream'
alias gcb='git_current_branch'
alias gb='git checkout -b'
alias gd='git diff'
alias gc='git commit'
alias gch='git checkout'
alias gl="git log --oneline --decorate --color --graph"
alias gla="gl --all"
alias gll="git log --color --abbrev-commit --pretty=format:'%C(red)%h%Creset%C(yellow)%d%Creset %s %C(green)%cr%C(white dim) %an%Creset'"
alias gpush='git push --all; git push --tags'
alias gsync='git_synchronize'
alias guc='git reset --soft HEAD~1'
alias gs='git status'
alias gaas='git add -A; gs'