# Makefile for French Python Documentation
#
# Here is what you can do:
#
# - make  # Automatically build an HTML local version
# - make todo  # To list remaining tasks and show current progression
# - make verifs  # To check for correctness: wrapping, spelling
# - make wrap  # To check for wrapping
# - make spell  # To check for spelling
# - make merge  # To merge pot from upstream
# - make fuzzy  # To find fuzzy strings
#
# Modes are: autobuild-stable, autobuild-dev, and autobuild-html,
# documented in gen/src/3.6/Doc/Makefile as we're only delegating the
# real work to the Python Doc Makefile.

# Configuration

# The CPYTHON_CURRENT_COMMIT is the commit, in the cpython repository,
# from which we generated our po files.  We use it here so when we
# test build, we're building with the .rst files that generated our
# .po files.
CPYTHON_CURRENT_COMMIT := d5feb2b1f12a15c1a9bac094a8f6f77d0cfcbdc2

LANGUAGE := fr
BRANCH := 3.10

EXCLUDED := whatsnew/ c-api/

# Internal variables

UPSTREAM := https://github.com/python/cpython

PYTHON := $(shell which python3)
MODE := html
POSPELL_TMP_DIR := .pospell/
JOBS := auto

# Detect OS

ifeq '$(findstring ;,$(PATH))' ';'
    detected_OS := Windows
else
    detected_OS := $(shell uname 2>/dev/null || echo Unknown)
    detected_OS := $(patsubst CYGWIN%,Cygwin,$(detected_OS))
    detected_OS := $(patsubst MSYS%,MSYS,$(detected_OS))
    detected_OS := $(patsubst MINGW%,MSYS,$(detected_OS))
endif

ifeq ($(detected_OS),Darwin)        # Mac OS X
    CP_CMD := gcp                   # accessible with `brew install coreutils` or `brew upgrade coreutils`
else
    CP_CMD := cp
endif

.PHONY: all
all: ensure_prerequisites
	git -C venv/cpython checkout $(CPYTHON_CURRENT_COMMIT) || (git -C venv/cpython fetch && git -C venv/cpython checkout $(CPYTHON_CURRENT_COMMIT))
	mkdir -p locales/$(LANGUAGE)/LC_MESSAGES/
	$(CP_CMD) -u --parents *.po */*.po locales/$(LANGUAGE)/LC_MESSAGES/
	$(MAKE) -C venv/cpython/Doc/ \
	  SPHINXOPTS='-j$(JOBS)             \
	  -D locale_dirs=$(abspath locales) \
	  -D language=$(LANGUAGE)           \
	  -D gettext_compact=0              \
	  -D latex_engine=xelatex           \
	  -D latex_elements.inputenc=       \
	  -D latex_elements.fontenc='       \
	  $(MODE)
	@echo "Build success, open file://$(abspath venv/cpython/)/Doc/build/html/index.html or run 'make serve' to see them."


# We clone cpython/ inside venv/ because venv/ is the only directory
# excluded by cpython' Sphinx configuration.
venv/cpython/.git/HEAD:
	git clone https://github.com/python/cpython venv/cpython


.PHONY: ensure_prerequisites
ensure_prerequisites: venv/cpython/.git/HEAD
	@if ! (blurb help >/dev/null 2>&1 && sphinx-build --version >/dev/null 2>&1); then \
	    git -C venv/cpython/ checkout $(BRANCH); \
	    echo "You're missing dependencies please install:"; \
	    echo ""; \
	    echo "  python -m pip install -r requirements.txt -r venv/cpython/Doc/requirements.txt"; \
	    exit 1; \
	fi


.PHONY: serve
serve:
	$(MAKE) -C venv/cpython/Doc/ serve

.PHONY: todo
todo: ensure_prerequisites
	potodo --exclude venv .venv $(EXCLUDED)

.PHONY: wrap
wrap: ensure_prerequisites
	@echo "Verify wrapping"
	powrap --check --quiet *.po **/*.po

SRCS = $(shell git diff --name-only $(BRANCH) | grep '.po$$')
# foo/bar.po => $(POSPELL_TMP_DIR)/foo/bar.po.out
DESTS = $(addprefix $(POSPELL_TMP_DIR)/,$(addsuffix .out,$(SRCS)))

.PHONY: spell
spell: ensure_prerequisites $(DESTS)

$(POSPELL_TMP_DIR)/%.po.out: %.po dict
	@echo "Pospell checking $<..."
	mkdir -p $(@D)
	pospell -p dict -l fr_FR $< && touch $@

.PHONY: fuzzy
fuzzy: ensure_prerequisites
	potodo -f --exclude venv .venv $(EXCLUDED)

.PHONY: verifs
verifs: wrap spell

.PHONY: merge
merge: ensure_prerequisites
	@echo "Merge from $(UPSTREAM)"
	git -C venv/cpython/ checkout $(BRANCH)
	git -C venv/cpython/ pull --ff-only
	(cd venv/cpython/Doc; sphinx-build -Q -b gettext -D gettext_compact=0 . ../pot)
	find venv/cpython/pot/ -name '*.pot' |\
	    while read -r POT; \
	    do \
	        PO="./$$(echo "$$POT" | sed "s#venv/cpython/pot/##; s#\.pot\$$#.po#")"; \
	        mkdir -p "$$(dirname "$$PO")"; \
	        if [ -f "$$PO" ]; \
	        then \
	            msgmerge --backup=off --force-po -U "$$PO" "$$POT"; \
	        else \
	            msgcat -o "$$PO" "$$POT"; \
	        fi \
	    done
	rm -fr venv/cpython/pot/
	sed -i 's|^#: .*Doc/|#: |' *.po */*.po
	powrap -m
	@printf "\n%s %s\n" "Replace CPYTHON_CURRENT_COMMIT in Makefile by: " $(shell git -C venv/cpython/ rev-parse HEAD)
	@printf 'To add, you can use:\n  git status -s | grep "^ M .*\.po" | cut -d" " -f3 | while read -r file; do if [ $$(git diff "$$file" | wc -l) -gt 13 ]; then git add "$$file"; fi ; done\n'

.PHONY: clean
clean:
	@echo "Cleaning *.mo and $(POSPELL_TMP_DIR)"
	rm -fr $(POSPELL_TMP_DIR)
	find -name '*.mo' -delete