perf: import newer modules separately for earlier Mercurial
demandimport of early Mercurial loads an imported module immediately,
if a module is imported absolutely by "from a import b" style. Recent
perf.py satisfies this condition, because it does:
- have "from __future__ import absolute_import" line
- use "from a import b" style for modules in "mercurial" package
Before this patch, importing modules below prevents perf.py from being
loaded by earlier Mercurial, because these aren't available in such
Mercurial, even though there are some code paths for Mercurial earlier
than 1.9.
- branchmap 2.5 (or bcee63733aad)
- repoview 2.5 (or 3a6ddacb7198)
- obsolete 2.3 (or ad0d6c2b3279)
- scmutil 1.9 (or 8b252e826c68)
For example, setting "_prereadsize" attribute in perfindex() and
perfnodelookup() is effective only with Mercurial earlier than 1.8 (or
61c9bc3da402).
After this patch, "mercurial.error" is the only blocker in "from
mercurial import" statement for loading perf.py with Mercurial earlier
than 1.2. This patch ignores it, because just importing it separately
isn't enough.
SOURCES=$(notdir $(wildcard ../mercurial/help/*.[0-9].txt))
MAN=$(SOURCES:%.txt=%)
HTML=$(SOURCES:%.txt=%.html)
GENDOC=gendoc.py ../mercurial/commands.py ../mercurial/help.py \
../mercurial/help/*.txt ../hgext/*.py ../hgext/*/__init__.py
PREFIX=/usr/local
MANDIR=$(PREFIX)/share/man
INSTALL=install -c -m 644
PYTHON=python
RSTARGS=
export HGENCODING=UTF-8
all: man html
man: $(MAN)
html: $(HTML)
common.txt $(SOURCES) $(SOURCES:%.txt=%.gendoc.txt): $(GENDOC)
${PYTHON} gendoc.py $(basename $@) > $@.tmp
mv $@.tmp $@
%: %.txt %.gendoc.txt common.txt
$(PYTHON) runrst hgmanpage $(RSTARGS) --halt warning \
--strip-elements-with-class htmlonly $*.txt $*
%.html: %.txt %.gendoc.txt common.txt
$(PYTHON) runrst html $(RSTARGS) --halt warning \
--link-stylesheet --stylesheet-path style.css $*.txt $*.html
MANIFEST: man html
# tracked files are already in the main MANIFEST
$(RM) $@
for i in $(MAN) $(HTML); do \
echo "doc/$$i" >> $@ ; \
done
install: man
for i in $(MAN) ; do \
subdir=`echo $$i | sed -n 's/^.*\.\([0-9]\)$$/man\1/p'` ; \
mkdir -p $(DESTDIR)$(MANDIR)/$$subdir ; \
$(INSTALL) $$i $(DESTDIR)$(MANDIR)/$$subdir ; \
done
clean:
$(RM) $(MAN) $(HTML) common.txt $(SOURCES) $(SOURCES:%.txt=%.gendoc.txt) MANIFEST