Mercurial > hg
view contrib/Makefile.python @ 30446:b324b4e431e5
posix: give checkexec a fast path; keep the check files and test read only
Before, Mercurial would create a new temporary file every time, stat it, change
its exec mode, stat it again, and delete it. Most of this dance was done to
handle the rare and not-so-essential case of VFAT mounts on unix. The cost of
that was paid by the much more common and important case of using normal file
systems.
Instead, try to create and preserve .hg/cache/checkisexec and
.hg/cache/checknoexec with and without exec flag set. If the files exist and
have correct exec flags set, we can conclude that that file system supports the
exec flag. Best case, the whole exec check can thus be done with two stat
calls. Worst case, we delete the wrong files and check as usual. That will be
because temporary loss of exec bit or on file systems without support for the
exec bit. In that case we check as we did before, with the additional overhead
of one extra stat call.
It is possible that this different test algorithm in some cases on odd file
systems will give different behaviour. Again, I think it will be rare and
special cases and I think it is worth the risk.
test-clone.t happens to show the situation where checkisexec is left behind
from the old style check, while checknoexec only will be created next time a
exec check will be performed.
author | Mads Kiilerich <madski@unity3d.com> |
---|---|
date | Wed, 14 Jan 2015 01:15:26 +0100 |
parents | 9f8b8c4e5076 |
children | 5e947367606c |
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PYTHONVER=2.7.10 PYTHONNAME=python- PREFIX=$(HOME)/bin/prefix-$(PYTHONNAME)$(PYTHONVER) SYMLINKDIR=$(HOME)/bin help: @echo @echo 'Make a custom installation of a Python version' @echo @echo 'Common make parameters:' @echo ' PYTHONVER=... [$(PYTHONVER)]' @echo ' PREFIX=... [$(PREFIX)]' @echo ' SYMLINKDIR=... [$(SYMLINKDIR) creating $(PYTHONNAME)$(PYTHONVER)]' @echo @echo 'Common make targets:' @echo ' python - install Python $$PYTHONVER in $$PREFIX' @echo ' symlink - create a $$SYMLINKDIR/$(PYTHONNAME)$$PYTHONVER symlink' @echo @echo 'Example: create a temporary Python installation:' @echo ' $$ make -f Makefile.python python PYTHONVER=${PYTHONVER} PREFIX=/tmp/p27' @echo ' $$ /tmp/p27/bin/python -V' @echo ' Python 2.7' @echo @echo 'Some external libraries are required for building Python: zlib bzip2 openssl.' @echo 'Make sure their development packages are installed systemwide.' # fedora: yum install zlib-devel bzip2-devel openssl-devel # debian: apt-get install zlib1g-dev libbz2-dev libssl-dev @echo @echo 'To build a nice collection of interesting Python versions:' @echo ' $$ for v in 2.{6{,.1,.2,.9},7{,.8,.10}}; do' @echo ' make -f Makefile.python symlink PYTHONVER=$$v || break; done' @echo 'To run a Mercurial test on all these Python versions:' @echo ' $$ for py in `cd ~/bin && ls $(PYTHONNAME)2.*`; do' @echo ' echo $$py; $$py run-tests.py test-http.t; echo; done' @echo export LANGUAGE=C export LC_ALL=C python: $(PREFIX)/bin/python docutils printf 'import sys, zlib, bz2, docutils, ssl' | $(PREFIX)/bin/python PYTHON_SRCDIR=Python-$(PYTHONVER) PYTHON_SRCFILE=$(PYTHON_SRCDIR).tgz $(PREFIX)/bin/python: [ -f $(PYTHON_SRCFILE) ] || wget http://www.python.org/ftp/python/$(PYTHONVER)/$(PYTHON_SRCFILE) || curl -OL http://www.python.org/ftp/python/$(PYTHONVER)/$(PYTHON_SRCFILE) || [ -f $(PYTHON_SRCFILE) ] rm -rf $(PYTHON_SRCDIR) tar xf $(PYTHON_SRCFILE) # Debian/Ubuntu disables SSLv2,3 the hard way, disable it on old Pythons too -sed -i 's,self.*SSLv[23]_method(),0;//\0,g' $(PYTHON_SRCDIR)/Modules/_ssl.c # Find multiarch system libraries on Ubuntu and disable fortify error when setting argv LDFLAGS="-L/usr/lib/`dpkg-architecture -qDEB_HOST_MULTIARCH`"; \ BASECFLAGS=-U_FORTIFY_SOURCE; \ export LDFLAGS BASECFLAGS; \ cd $(PYTHON_SRCDIR) && ./configure --prefix=$(PREFIX) && make all SVNVERSION=pwd && make install printf 'import sys, zlib, bz2, ssl' | $(PREFIX)/bin/python rm -rf $(PYTHON_SRCDIR) DOCUTILSVER=0.12 DOCUTILS_SRCDIR=docutils-$(DOCUTILSVER) DOCUTILS_SRCFILE=$(DOCUTILS_SRCDIR).tar.gz docutils: $(PREFIX)/bin/python @$(PREFIX)/bin/python -c 'import docutils' || ( set -ex; \ [ -f $(DOCUTILS_SRCFILE) ] || wget http://downloads.sourceforge.net/project/docutils/docutils/$(DOCUTILSVER)/$(DOCUTILS_SRCFILE) || [ -f $(DOCUTILS_SRCFILE) ]; \ rm -rf $(DOCUTILS_SRCDIR); \ tar xf $(DOCUTILS_SRCFILE); \ cd $(DOCUTILS_SRCDIR) && $(PREFIX)/bin/python setup.py install --prefix=$(PREFIX); \ $(PREFIX)/bin/python -c 'import docutils'; \ rm -rf $(DOCUTILS_SRCDIR); ) symlink: python $(SYMLINKDIR) ln -sf $(PREFIX)/bin/python $(SYMLINKDIR)/$(PYTHONNAME)$(PYTHONVER) .PHONY: help python docutils symlink