#!/usr/bin/env bash
#ddev-generated
# Keep the add-on's own artifacts out of git, in every project it is installed in.
#
# Rewrites a marker-delimited block in the project's .git/info/exclude. That file is
# per-clone and never committed, and every git process honours it -- unlike
# core.excludesfile, which is set on the container's git config only and so does
# nothing for git run from the host. Called by install.sh, which runs on "ddev start"
# and on every "ddev claude", so the list refreshes itself as the add-on changes.
#
# Personal patterns (.DS_Store, .idea, CLAUDE.md, ...) are deliberately NOT here:
# they belong in ~/.gitignore_global, not to this add-on.
set -uo pipefail

BEGIN='# >>> ddev-claude-cli >>>'
END='# <<< ddev-claude-cli <<<'
# Block written by this add-on before it was renamed from ddev-codex-claude-cli; removed on sight.
LEGACY_BEGIN='# >>> ddev-codex-claude-cli >>>'
LEGACY_END='# <<< ddev-codex-claude-cli <<<'

PATTERNS=(
  '.ddev/addon-metadata/ddev-claude-cli/'
  '.ddev/config.claude-cli.yaml'
  '.ddev/commands/web/claude'
  '.ddev/commands/web/claude-swap'
  '.ddev/commands/web/claude-refs'
  '.ddev/commands/host/claude-browser'
  '.ddev/docker-compose.claude-browser.yaml'
  '.ddev/claude-code/'
  '.ddev/claude-refs.txt'
  '.ddev/plans/'
  '.ddev/codex-cli/'   # legacy: left behind by add-on versions that shipped Codex CLI
)

approot="${DDEV_APPROOT:-$(pwd)}"

# --git-common-dir resolves a worktree's .git file to the real directory. Anything
# that is not a git checkout is not an error: ddev start must never fail over this.
gitdir="$(git -C "${approot}" rev-parse --git-common-dir 2>/dev/null)" || exit 0
[ -n "${gitdir}" ] || exit 0
case "${gitdir}" in /*) ;; *) gitdir="${approot}/${gitdir}" ;; esac
[ -d "${gitdir}" ] || exit 0

info="${gitdir}/info"
exclude="${info}/exclude"
mkdir -p "${info}" 2>/dev/null || exit 0
[ -e "${exclude}" ] || : >"${exclude}" 2>/dev/null || exit 0
[ -w "${exclude}" ] || exit 0

block="$(
  printf '%s\n' "${BEGIN}"
  printf '%s\n' "# Managed by .ddev/claude-code/git-exclude.sh. Edits inside this block are lost."
  printf '%s\n' "${PATTERNS[@]}"
  printf '%s\n' "${END}"
)"

# Drop the pre-rename block first, then replace the current block in place or
# append it after a blank line.
current="$(awk -v begin="${LEGACY_BEGIN}" -v end="${LEGACY_END}" '
  index($0, begin) == 1 { skip = 1; next }
  skip && index($0, end) == 1 { skip = 0; eat = 1; next }
  eat && $0 == "" { eat = 0; next }
  { eat = 0 }
  !skip { print }
' "${exclude}")"
if grep -qF "${BEGIN}" <<<"${current}" && grep -qF "${END}" <<<"${current}"; then
  updated="$(awk -v begin="${BEGIN}" -v end="${END}" -v block="${block}" '
    index($0, begin) == 1 { print block; skip = 1; next }
    skip && index($0, end) == 1 { skip = 0; next }
    !skip { print }
  ' <<<"${current}")"
else
  updated="$(printf '%s' "${current}"; [ -n "${current}" ] && printf '\n\n'; printf '%s\n' "${block}")"
fi

# Only write on a real change, so "ddev start" does not touch the mtime every time.
# cat > rather than mv: the file may be bind-mounted.
if [ "${updated}" != "$(cat "${exclude}")" ]; then
  printf '%s\n' "${updated}" >"${exclude}" || exit 0
fi