Auto create a branch from the current branch and push it to origin with confirmation

git-b.sh

#!/usr/bin/env bash
# git-b — Auto create a branch from the current branch and push it to origin with confirmation
# Usage:
#   git-b
# will get you prompt for prefix surfix and message,
# created branch will be in format: <prefix>/<surfix>/<message>
# names are auto escaped to be URL safe and lowercase, e.g. "My Feature" → "my-feature"
#
# Flow:
# 1) Abort if there are uncommitted changes.
# 2) Ensure we're on stage (switch if needed).
# 3) Pull from origin/stage.
# 4) Prompt: Prefix, Suffix, Message
# 5) Create: prefix/suffix/message (all sanitized)

set -euo pipefail

# --- Ensure Git repo ---
if ! git rev-parse --is-inside-work-tree >/dev/null 2>&1; then
  echo "❌ Error: not a git repository" >&2
  exit 1
fi

# --- Colors ---
if [ -t 1 ]; then
  YELLOW=$(printf '\033[1;33m')
  GREEN=$(printf '\033[1;32m')
  RED=$(printf '\033[1;31m')
  BLUE=$(printf '\033[0;36m')
  RESET=$(printf '\033[0m')
else
  YELLOW=""; GREEN=""; RED=""; BLUE=""; RESET=""
fi

# --- TTY (for interactive prompts even if stdin is not a TTY) ---
TTY_IN="/dev/tty"
TTY_OUT="/dev/tty"
if [[ ! -r "$TTY_IN" || ! -w "$TTY_OUT" ]]; then
  # fallback
  TTY_IN="/dev/stdin"
  TTY_OUT="/dev/stdout"
fi

# --- Sanitize function ---
sanitize_slug() {
  local input="$1"
  local out

  # Normalize/strip problematic Unicode (copy/paste junk) BEFORE iconv/sed
  out="$(
    printf '%s' "$input" | perl -CS -pe '
      s/^\s+|\s+$//g;                                            # trim (unicode-aware)
      s/[\x{200B}\x{200C}\x{200D}\x{2060}\x{FEFF}]//g;            # zero-width (ZWSP/ZWNJ/ZWJ/WORD JOINER/BOM)
      s/[\x{FE0E}\x{FE0F}]//g;                                    # variation selectors (emoji style)
      s/[\x{00A0}\x{202F}\x{2007}]//g;                            # NBSP / narrow NBSP / figure space
      s/[\x{2010}\x{2011}\x{2012}\x{2013}\x{2014}\x{2212}\x{FE63}\x{FF0D}]/-/g;  # unicode dashes -> "-"
    '
  )"

  # Transliterate to ASCII (best effort)
  out="$(
    printf '%s' "$out" | iconv -f UTF-8 -t ASCII//TRANSLIT 2>/dev/null || printf '%s' "$out"
  )"

  # Hard strip to printable ASCII (also nukes weird controls like \r)
  out="$(printf '%s' "$out" | LC_ALL=C tr -cd '\11\12\15\40-\176')"

  # lowercase + collapse to [a-z0-9-]
  out="$(printf '%s' "$out" \
    | tr '[:upper:]' '[:lower:]' \
    | sed -E 's/[^a-z0-9]+/-/g' \
    | sed -E 's/^-+|-+$//g' \
    | sed -E 's/-+/-/g'
  )"

  printf '%s' "$out"
}

trim_trailing_ws() {
  # removes trailing spaces/tabs/newlines + CR
  printf '%s' "$1" | perl -CS -pe 's/\r//g; s/\s+\z//;'
}

normalize_suffix_input() {
  local input="$1"
  local cleaned ticket looks_like_url=0

  # 1) Remove common invisible chars + trim
  cleaned="$(
    printf '%s' "$input" | perl -CS -pe '
      s/[\x{200B}\x{200C}\x{200D}\x{2060}\x{FEFF}]//g;  # zero-width
      s/[\x{FE0E}\x{FE0F}]//g;                          # variation selectors
      s/[\x{00A0}\x{202F}\x{2007}]//g;                  # NBSP variants
      s/\r//g;                                          # CR
      s/^\s+|\s+$//g;                                   # trim
    '
  )"

  # 2) Only extract KEY-123 if it looks like a URL/path/query (typical browser address bar paste)
  # You can tweak this heuristic if needed.
  if printf '%s' "$cleaned" | grep -Eq '://|/browse/|[/?#]'; then
    looks_like_url=1
  fi

  if [[ $looks_like_url -eq 1 ]]; then
    ticket="$(
      printf '%s' "$cleaned" \
      | perl -ne 'while(/([A-Za-z][A-Za-z0-9]+-\d+)/g){$m=$1} END{print $m // ""}'
    )"
    if [[ -n "$ticket" ]]; then
      printf '%s' "$ticket" | tr '[:lower:]' '[:upper:]'
      return 0
    fi
  fi

  # 3) Otherwise: return cleaned as-is (sanitization later will do the rest)
  printf '%s' "$cleaned"
}


# --- Prefix selector (arrow navigation, reads from /dev/tty) ---
select_prefix() {
  local options=("feature" "bugfix" "hubspot" "qa" "hubspot" "custom")
  local idx=0
  local key choice custom_input

  while true; do
    printf "\nSelect prefix (↑/↓, Enter):\n" >"$TTY_OUT"

    while true; do
      for i in "${!options[@]}"; do
        if [[ $i -eq $idx ]]; then
          printf "  %s> %s%s\n" "$GREEN" "${options[$i]}" "$RESET" >"$TTY_OUT"
        else
          printf "    %s\n" "${options[$i]}" >"$TTY_OUT"
        fi
      done

      IFS= read -rsn1 key <"$TTY_IN" || true

      if [[ $key == $'\x1b' ]]; then
        IFS= read -rsn2 key <"$TTY_IN" || true
        case "$key" in
          "[A") ((idx = (idx - 1 + ${#options[@]}) % ${#options[@]})) ;; # up
          "[B") ((idx = (idx + 1) % ${#options[@]})) ;;                  # down
        esac
      elif [[ $key == "" ]]; then
        break
      fi

      # Move cursor up by number of options and clear down
      printf "\033[%dA" "${#options[@]}" >"$TTY_OUT"
      printf "\033[J" >"$TTY_OUT"
    done

    choice="${options[$idx]}"
    printf "\n" >"$TTY_OUT"

    if [[ "$choice" == "custom" ]]; then
      while true; do
        printf "Custom prefix %s(np. client, hotfix, release)%s: " "$BLUE" "$RESET" >"$TTY_OUT"
        IFS= read -r custom_input <"$TTY_IN" || true
        custom_input="$(sanitize_slug "$custom_input")"

        if [[ -z "$custom_input" ]]; then
          printf "⚠️  Custom prefix cannot be empty. Try again.\n\n" >"$TTY_OUT"
          continue
        fi

        echo "$custom_input"
        return 0
      done
    fi

    echo "$choice"
    return 0
  done
}

# --- 1) Check clean working tree ---
if [[ -n "$(git status --porcelain)" ]]; then
  echo "🛑 ${RED}Working tree is not clean.${RESET}"
  git status --short
  echo
  echo "Commit/stash/discard changes first."
  exit 1
fi

# --- 2) Ensure stage branch ---
current_branch="$(git rev-parse --abbrev-ref HEAD)"
if [[ "$current_branch" == "HEAD" ]]; then
  echo "⚠️ Detached HEAD state."
  exit 1
fi

if [[ "$current_branch" != "stage" ]]; then
  echo "🔁 Switching to ${YELLOW}stage${RESET}"
  git fetch origin stage >/dev/null 2>&1 || true

  if git show-ref --verify --quiet "refs/heads/stage"; then
    git checkout stage
  elif git show-ref --verify --quiet "refs/remotes/origin/stage"; then
    git checkout -b stage origin/stage
  else
    echo "❌ Cannot find stage branch."
    exit 1
  fi
fi

# --- 3) Pull latest stage ---
echo "⬇️  Pulling ${YELLOW}origin/stage${RESET}"
if ! git pull origin stage; then
  echo "🛑 ${RED}Pull failed. Resolve conflicts first.${RESET}"
  exit 1
fi

if [[ -n "$(git status --porcelain)" ]]; then
  echo "🛑 Repository not clean after pull."
  git status --short
  exit 1
fi

# --- 4) Ask for branch parts ---
prefix_in="$(select_prefix)"

printf "Suffix %s(np. 245590636737, JIRA-123)%s: " "$BLUE" "$RESET" >"$TTY_OUT"
IFS= read -r suffix_in <"$TTY_IN" || true
suffix_in="$(trim_trailing_ws "$suffix_in")"

while true; do
  printf "Message %s(short description)%s: " "$BLUE" "$RESET" >"$TTY_OUT"
  IFS= read -r message_in <"$TTY_IN" || true
  message_in="$(trim_trailing_ws "$message_in")"

  if [[ -z "$message_in" ]]; then
    printf "⚠️  Message cannot be empty. Paste/type it again.\n" >"$TTY_OUT"
    continue
  fi
  break
done

prefix="$(sanitize_slug "$prefix_in")"
suffix="$(normalize_suffix_input "$suffix_in")"
message="$(sanitize_slug "$message_in")"



if [[ -z "$prefix" || -z "$suffix" || -z "$message" ]]; then
  echo "❌ Invalid values after sanitization."
  exit 1
fi

new_branch="${prefix}/${suffix}/${message}"

if git show-ref --verify --quiet "refs/heads/$new_branch"; then
  echo "❌ Branch already exists locally: $new_branch"
  exit 1
fi

if git show-ref --verify --quiet "refs/remotes/origin/$new_branch"; then
  echo "❌ Branch already exists on origin: $new_branch"
  exit 1
fi

# --- 5) Create branch ---
echo "🌿 Creating branch: ${GREEN}${new_branch}${RESET}"
git checkout -B "$new_branch" origin/stage 2>/dev/null || git checkout -B "$new_branch" stage


echo "✅ Done:"
echo "   ${GREEN}${new_branch}${RESET}"

# sudo mv git-b.sh /usr/local/bin/git-b
# sudo chmod +x /usr/local/bin/git-b

# BASH:
# echo 'alias git-b="bash /usr/local/bin/git-b"' >> ~/.bashrc
# source ~/.bashrc
# ZSH:
# echo 'alias git-b="bash /usr/local/bin/git-b"' >> ~/.zshrc
# source ~/.zshrc