#!/usr/bin/env bash
# gup, git add + auto-message + commit + push, in one word.
# The companion to your forever private repo. From how.nixfred.com.
#
# Install:  curl -fsSL https://how.nixfred.com/gup -o ~/bin/gup && chmod +x ~/bin/gup
#           (make sure ~/bin is on your PATH)
# Use:      gup                 commit + push, auto message from changed files
#           gup "your message"  commit + push with your message
#           gup -n   (or wgup)  preview only, show what would commit, change nothing
set -uo pipefail

git rev-parse --is-inside-work-tree >/dev/null 2>&1 || { echo "gup: not inside a git repo"; exit 1; }
cd "$(git rev-parse --show-toplevel)"

preview=0
case "${1:-}" in -n|--dry-run|wgup) preview=1; shift;; esac
msg="${1:-}"

if [ -z "$(git status --porcelain)" ]; then echo "gup: nothing to commit, working tree clean"; exit 0; fi

# Law 11: always know where you're pushing. Read the remote out loud.
remote="$(git remote get-url origin 2>/dev/null || echo '(no remote set)')"
echo "→ remote: $remote"
echo "→ branch: $(git rev-parse --abbrev-ref HEAD 2>/dev/null)"
git status --short

# auto-generate a searchable message from the changed files
if [ -z "$msg" ]; then
  n="$(git status --porcelain | wc -l | tr -d ' ')"
  files="$(git status --porcelain | sed 's/^...//' | xargs -n1 basename 2>/dev/null | sort -u | paste -sd', ' - | cut -c1-72)"
  msg="update ${n} file(s): ${files}"
fi

if [ "$preview" = 1 ]; then echo "[preview] would commit: \"$msg\" (no changes made)"; exit 0; fi

git add -A
git commit -q -m "$msg" || { echo "gup: commit failed"; exit 1; }
if git remote get-url origin >/dev/null 2>&1; then
  git push -q && echo "✓ committed + pushed: $msg" || { echo "gup: push failed (committed locally)"; exit 1; }
else
  echo "✓ committed (no remote to push to): $msg"
fi