git branch selector

gitbranchs.sh

#!/usr/bin/env bash
set -euo pipefail

INITIAL_QUERY="${1:-}"

REMOTES=$(git remote 2>/dev/null | paste -sd ' ' -)
[ -z "$REMOTES" ] && REMOTES="(none)"

CURRENT_BRANCH=$(git branch --show-current 2>/dev/null || echo "???")

HEADER="Pattern: ${INITIAL_QUERY:-<type to search>}  |  Remotes: ${REMOTES}  |  Current: ${CURRENT_BRANCH}"

BRANCHES=$( {
  git branch --format='%(refname:short)'
  git branch -r --format='%(refname:short)'
} | sort -u )

SELECTED=$(echo "$BRANCHES" | fzf \
  --sync \
  --header="$HEADER" \
  --header-first \
  --query="$INITIAL_QUERY" \
  --preview='git log --oneline -30 {} 2>/dev/null || echo "(no commits)"' \
  --preview-window='right:50%:wrap:border-rounded' \
  --preview-label=' Commit Log ' \
  --prompt='Branch > ' \
  --layout=reverse \
  --border=rounded \
  --list-border=rounded \
  --list-label=' Branches ' \
  --scrollbar='▌' \
  --ansi)

if [ -z "$SELECTED" ]; then
  exit 0
fi

if git show-ref --verify --quiet "refs/heads/$SELECTED"; then
  echo "Switching to local branch: $SELECTED"
  git switch "$SELECTED"
else
  REMOTE="${SELECTED%%/*}"
  BRANCH="${SELECTED#*/}"
  if git show-ref --verify --quiet "refs/remotes/$SELECTED"; then
    if git show-ref --verify --quiet "refs/heads/$BRANCH"; then
      echo "Switching to local branch: $BRANCH"
      git switch "$BRANCH"
    else
      echo "Creating local branch '$BRANCH' tracking '$SELECTED'..."
      git switch -c "$BRANCH" --track "$SELECTED"
    fi
  else
    echo "Switching to: $SELECTED"
    git switch "$SELECTED" 2>/dev/null || git checkout "$SELECTED"
  fi
fi