Makefile

bdiff: gradually enable the popularity hack

Patch from Jason Orendorff

The lower the threshold, the stronger the popularity hack's
influence. So at 3999 lines, the hack is disabled; and at 4000 lines,
the hack is enabled at maximum strength (t=4).

No source file in mercurial/crew is over 4000 lines. But there are, oh,
a few such files in Mozilla.  I can testify that this hack causes hg to
generate some correct but eyebrow-raising patches.

I think the hack should phase in gradually. The threshold should be high
for small files where we don't need it so much.  Like this:

        t = (bn < 31000) ? 1000000 / bn : bn / 1000;

That would leave the popularity hack disabled for small files, then
gradually phase it in:

    bn <   1000   --   t > bn    (popularity hack is completely disabled)
    bn ==  1000   --   t = 1000  (still effectively disabled)
    bn ==  2000   --   t =  500  (only hits unusual files)
    bn == 10000   --   t =  100  (only hits especially common lines)
    bn == 31000   --   t =   31  (hack is at maximum power)
    bn == 32000   --   t =   32  (hack could backfire, ease off)

PREFIX=/usr/local
export PREFIX
PYTHON=python
PURE=
PYTHON_FILES:=$(shell find mercurial hgext doc -name '*.py')

help:
	@echo 'Commonly used make targets:'
	@echo '  all          - build program and documentation'
	@echo '  install      - install program and man pages to PREFIX ($(PREFIX))'
	@echo '  install-home - install with setup.py install --home=HOME ($(HOME))'
	@echo '  local        - build for inplace usage'
	@echo '  tests        - run all tests in the automatic test suite'
	@echo '  test-foo     - run only specified tests (e.g. test-merge1)'
	@echo '  dist         - run all tests and create a source tarball in dist/'
	@echo '  clean        - remove files created by other targets'
	@echo '                 (except installed files or dist source tarball)'
	@echo '  update-pot   - update i18n/hg.pot'
	@echo
	@echo 'Example for a system-wide installation under /usr/local:'
	@echo '  make all && su -c "make install" && hg version'
	@echo
	@echo 'Example for a local installation (usable in this directory):'
	@echo '  make local && ./hg version'

all: build doc

local:
	$(PYTHON) setup.py $(PURE) build_py -c -d . build_ext -i build_mo
	$(PYTHON) hg version

build:
	$(PYTHON) setup.py $(PURE) build

doc:
	$(MAKE) -C doc

clean:
	-$(PYTHON) setup.py clean --all # ignore errors from this command
	find . -name '*.py[cdo]' -exec rm -f '{}' ';'
	rm -f MANIFEST mercurial/__version__.py mercurial/*.so tests/*.err
	rm -rf locale
	$(MAKE) -C doc clean

install: install-bin install-doc

install-bin: build
	$(PYTHON) setup.py $(PURE) install --prefix="$(PREFIX)" --force

install-doc: doc
	cd doc && $(MAKE) $(MFLAGS) install

install-home: install-home-bin install-home-doc

install-home-bin: build
	$(PYTHON) setup.py $(PURE) install --home="$(HOME)" --force

install-home-doc: doc
	cd doc && $(MAKE) $(MFLAGS) PREFIX="$(HOME)" install

MANIFEST-doc:
	$(MAKE) -C doc MANIFEST

MANIFEST: MANIFEST-doc
	hg manifest > MANIFEST
	echo mercurial/__version__.py >> MANIFEST
	cat doc/MANIFEST >> MANIFEST

dist:	tests dist-notests

dist-notests:	doc MANIFEST
	TAR_OPTIONS="--owner=root --group=root --mode=u+w,go-w,a+rX-s" $(PYTHON) setup.py -q sdist

tests:
	cd tests && $(PYTHON) run-tests.py $(TESTFLAGS)

test-%:
	cd tests && $(PYTHON) run-tests.py $(TESTFLAGS) $@

update-pot: i18n/hg.pot

i18n/hg.pot: $(PYTHON_FILES)
	$(PYTHON) i18n/hggettext mercurial/commands.py \
	  hgext/*.py hgext/*/__init__.py > i18n/hg.pot
        # All strings marked for translation in Mercurial contain
        # ASCII characters only. But some files contain string
        # literals like this '\037\213'. xgettext thinks it has to
        # parse them even though they are not marked for translation.
        # Extracting with an explicit encoding of ISO-8859-1 will make
        # xgettext "parse" and ignore them.
	echo $^ | xargs \
	  xgettext --package-name "Mercurial" \
	  --msgid-bugs-address "<[e-mail]>" \
	  --copyright-holder "Matt Mackall <[e-mail]> and others" \
	  --from-code ISO-8859-1 --join --sort-by-file \
	  -d hg -p i18n -o hg.pot

%.po: i18n/hg.pot
	msgmerge --no-location --update $@ $^

.PHONY: help all local build doc clean install install-bin install-doc \
	install-home install-home-bin install-home-doc dist dist-notests tests \
	update-pot