# DuckBrain development harness — Makefile
#
# This file (along with tests/, phpunit.xml, composer.*, .gitignore) lives
# ONLY on the develop branch. master is a publish-only vitrine that contains
# nothing but the readable artifact: nobody commits to master directly, and
# no file outside the WHITELIST below ever reaches it.
#
# Daily loop:
#   make test     run the unit suite (sqlite :memory:, no containers, no
#                 network; installs dev dependencies first if missing)
#   ...then develop on develop and commit there as usual.
#
# Publishing ritual (human only — AI agents must never run it; it commits):
#   1. make publish MSG="feat: ..."   (MSG optional, defaults to "sync: <date>")
#   2. review the new master commit (git log -1 refs/heads/master); if the
#      generated message needs polish, rewrite it BEFORE pushing, e.g.
#      from Emacs
#   3. git push origin master         (manual on purpose: pushing is a
#                                      decision, never a side effect)
#
# How publish builds master — wipe-and-rebuild mirror, no merges, no
# cherry-picks (see design decisions behind establish-dev-publish-workflow):
#   - refuses to run off develop or with a dirty working tree
#   - checks master out into a disposable worktree under .publish/
#     (your current working tree is never touched)
#   - for each WHITELIST path: removes master's copy and checks out develop's,
#     so deleted/renamed artifact files never survive as ghosts in master
#   - BLACKLIST then subtracts noise found INSIDE whitelisted paths
#   - creates the commit only when the artifact actually changed; its body
#     lists the develop commits (after the last-sync tag) that touched
#     WHITELIST paths — pure-noise commits are filtered out automatically
#   - moves the last-sync tag to develop's tip, removes the worktree, and
#     prints any root entry left out of WHITELIST (add it if it belongs to
#     the artifact)

SHELL := /bin/bash

.PHONY: test publish

PHPUNIT := vendor/bin/phpunit

# --- publish configuration -------------------------------------------------
WHITELIST     := src config.php index.php autoload.php .htaccess readme.org
BLACKLIST     :=
DEVELOP_BRANCH  := develop
DEVELOP_REF     := refs/heads/$(DEVELOP_BRANCH)
MASTER_BRANCH   := master
MASTER_REF      := refs/heads/$(MASTER_BRANCH)
LAST_SYNC_TAG  := last-sync
MSG            ?= sync: $(shell date +%Y-%m-%d)

test: $(PHPUNIT)
	./$(PHPUNIT)

$(PHPUNIT): composer.json composer.lock
	composer install --no-interaction

publish:
	@if [ "$$(git branch --show-current)" != "$(DEVELOP_BRANCH)" ]; then \
		echo "ABORT: publish must be invoked from $(DEVELOP_BRANCH) (current: '$$(git branch --show-current)')"; \
		exit 1; \
	fi
	@if [ -n "$$(git status --porcelain)" ]; then \
		echo "ABORT: working tree is dirty; commit your changes on $(DEVELOP_BRANCH) before publishing:"; \
		git status --short; \
		exit 1; \
	fi
	git worktree remove --force .publish/master 2>/dev/null || true
	git worktree add --quiet .publish/master $(MASTER_BRANCH)
	@test "$$(git -C .publish/master symbolic-ref HEAD)" = "$(MASTER_REF)" || { \
		echo "ABORT: publish worktree HEAD is not attached to $(MASTER_REF)"; \
		git worktree remove --force .publish/master; exit 1; }
	@for w in $(WHITELIST); do git -C .publish/master rm -rf --ignore-unmatch --quiet -- $$w; done
	git -C .publish/master checkout $(DEVELOP_REF) -- $(WHITELIST)
	@for b in $(BLACKLIST); do git -C .publish/master rm -rf --ignore-unmatch --quiet -- $$b; done
	git -C .publish/master diff --quiet $(DEVELOP_REF) -- $(WHITELIST)
	@if git -C .publish/master diff --cached --quiet; then \
		echo "nothing to publish: master already mirrors $(DEVELOP_BRANCH)"; \
	else \
		set -e; \
		if git rev-parse -q --verify tags/$(LAST_SYNC_TAG) >/dev/null; then \
			RANGE=$(LAST_SYNC_TAG)..$(DEVELOP_REF); \
		else \
			echo "note: no $(LAST_SYNC_TAG) tag yet; summarizing full $(DEVELOP_BRANCH) history"; \
			RANGE=$(DEVELOP_REF); \
		fi; \
		BODY=$$(git log $$RANGE --oneline -- $(WHITELIST)); \
		{ printf '%s\n' "$(MSG)"; printf '\n'; printf '%s\n' "$$BODY"; } > .publish/msg.txt; \
		git -C .publish/master commit --quiet -F "$$(pwd)/.publish/msg.txt"; \
		echo "publish commit created; review/edit it (before pushing) with your git tool of choice"; \
	fi
	git tag -f $(LAST_SYNC_TAG) $(DEVELOP_REF) >/dev/null
	git worktree remove .publish/master
	@echo "root entries left behind in $(DEVELOP_BRANCH) (add to WHITELIST if they belong to the artifact):"; \
	comm -23 <(git ls-tree --name-only $(DEVELOP_REF) | sort) \
	         <(for x in $(WHITELIST) $(BLACKLIST); do echo $$x; done | sort) | sed 's/^/  - /'