Detects placeholder in git command and start branch selector using peco/percol

git

#!/usr/bin/env bash

# NOTE: brought from rbenv https://github.com/sstephenson/rbenv/blob/master/libexec/rbenv-which
expand_path() {
  if [ ! -d "$1" ]; then
    return 1
  fi

  local cwd="$(pwd)"
  cd "$1"
  pwd
  cd "$cwd"
}

remove_from_path() {
  local path_to_remove="$(expand_path "$1")"
  local result=""

  if [ -z "$path_to_remove" ]; then
    echo "${PATH}"
    return
  fi

  local paths
  IFS=: paths=($PATH)

  for path in "${paths[@]}"; do
    path="$(expand_path "$path" || true)"
    if [ -n "$path" ] && [ "$path" != "$path_to_remove" ]; then
      result="${result}${path}:"
    fi
  done

  echo "${result%:}"
}

program="${0##*/}"
param="$@"
name=$(echo "$@" | sed -e "s/^[^{]*{\(.\+\)}[^}]*$/\1/")

paths=$(remove_from_path "$HOME/.funl/")

bin_path=$(PATH=$paths which $program)
if [ -z "$bin_path" ]; then
  exit 1
fi

if [ "$param" = "$name" ] || [ "$name" != 'branch' ]; then
  exec -a "$program" "$bin_path" "$@"
else
  sel=$(git for-each-ref --sort=-committerdate refs/heads/ | cut -f2 | sed 's/refs\/heads\///g' | peco | xargs echo)
  arg="s|{$name}|$sel|"
  cmd=$(echo "$@" | sed "$arg")
  exec -a "$program" $bin_path $cmd
fi