language: python

python:

- "2.6"

- "2.7"

- "pypy"

- "3.3"

- "3.4"

install:

- pip install tox

script:

- tox -e $(echo py$TRAVIS_PYTHON_VERSION | tr -d . | sed -e 's/pypypy/pypy/')

Copyright (c) 2015 Markus Unterwaditzer

Permission is hereby granted, free of charge, to any person obtaining a copy of

this software and associated documentation files (the "Software"), to deal in

the Software without restriction, including without limitation the rights to

use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies

of the Software, and to permit persons to whom the Software is furnished to do

so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all

copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

SOFTWARE.

python-atomicwrites

.. image:: https://travis-ci.org/untitaker/python-atomicwrites.svg?branch=master

:target: https://travis-ci.org/untitaker/python-atomicwrites

Atomic file writes on POSIX.

Usage::

License

Licensed under the MIT, see ``LICENSE``.

import codecs

import contextlib

import os

import tempfile

__version__ = '0.1.0'

class AtomicWriterBase(object):

'''

def __init__(self, path, overwrite=False):

self._path = path

self._overwrite = overwrite

def open(self, mode='w'):

'''Prepare the temporary file object and return it.'''

raise NotImplementedError()

def commit(self):

'''Move the temporary file to the target location.'''

raise NotImplementedError()

def rollback(self):

'''Clean up all temporary resources.'''

raise NotImplementedError()

def _open(self, fileobject):

@contextlib.contextmanager

def inner():

try:

with fileobject as f:

yield f

except:

self.rollback()

raise

else:

self.commit()

return inner()

class PosixAtomicWriter(AtomicWriterBase):

'''

def get_tmppath(self):

'''Return the temporary path to use.'''

tmpdir = os.path.dirname(self._path)

_, tmppath = tempfile.mkstemp(dir=tmpdir)

return tmppath

def open(self, mode='w', **open_kwargs):

'''

self._tmppath = self.get_tmppath()

return self._open(codecs.open(self._tmppath, mode=mode, **open_kwargs))

def commit(self):

if self._overwrite:

os.rename(self._tmppath, self._path) # atomic

else:

os.link(self._tmppath, self._path) # atomic, fails if file exists

os.unlink(self._tmppath)

def rollback(self):

os.unlink(self._tmppath)

AtomicWriter = PosixAtomicWriter # for current OS

def atomic_write(path, mode='w', overwrite=False, writer_cls=AtomicWriter,

**open_kwargs):

'''

return writer_cls(path, overwrite=overwrite).open(mode=mode, **open_kwargs)

SPHINXOPTS =

SPHINXBUILD = sphinx-build

PAPER =

BUILDDIR = _build

ifeq ($(shell which $(SPHINXBUILD) >/dev/null 2>&1; echo $$?), 1)

$(error The '$(SPHINXBUILD)' command was not found. Make sure you have Sphinx installed, then set the SPHINXBUILD environment variable to point to the full path of the '$(SPHINXBUILD)' executable. Alternatively you can add the directory with the executable to your PATH. If you don't have Sphinx installed, grab it from http://sphinx-doc.org/)

PAPEROPT_a4 = -D latex_paper_size=a4

PAPEROPT_letter = -D latex_paper_size=letter

ALLSPHINXOPTS = -d $(BUILDDIR)/doctrees $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .

I18NSPHINXOPTS = $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .

.PHONY: help clean html dirhtml singlehtml pickle json htmlhelp qthelp devhelp epub latex latexpdf text man changes linkcheck doctest gettext

help:

@echo "Please use \`make <target>' where <target> is one of"

@echo " html to make standalone HTML files"

@echo " dirhtml to make HTML files named index.html in directories"

@echo " singlehtml to make a single large HTML file"

@echo " pickle to make pickle files"

@echo " json to make JSON files"

@echo " htmlhelp to make HTML files and a HTML help project"

@echo " qthelp to make HTML files and a qthelp project"

@echo " devhelp to make HTML files and a Devhelp project"

@echo " epub to make an epub"

@echo " latex to make LaTeX files, you can set PAPER=a4 or PAPER=letter"

@echo " latexpdf to make LaTeX files and run them through pdflatex"

@echo " latexpdfja to make LaTeX files and run them through platex/dvipdfmx"

@echo " text to make text files"

@echo " man to make manual pages"

@echo " texinfo to make Texinfo files"

@echo " info to make Texinfo files and run them through makeinfo"

@echo " gettext to make PO message catalogs"

@echo " changes to make an overview of all changed/added/deprecated items"

@echo " xml to make Docutils-native XML files"

@echo " pseudoxml to make pseudoxml-XML files for display purposes"

@echo " linkcheck to check all external links for integrity"

@echo " doctest to run all doctests embedded in the documentation (if enabled)"

clean:

rm -rf $(BUILDDIR)/*

html:

$(SPHINXBUILD) -b html $(ALLSPHINXOPTS) $(BUILDDIR)/html

@echo

@echo "Build finished. The HTML pages are in $(BUILDDIR)/html."

dirhtml:

$(SPHINXBUILD) -b dirhtml $(ALLSPHINXOPTS) $(BUILDDIR)/dirhtml

@echo

@echo "Build finished. The HTML pages are in $(BUILDDIR)/dirhtml."

singlehtml:

$(SPHINXBUILD) -b singlehtml $(ALLSPHINXOPTS) $(BUILDDIR)/singlehtml

@echo

@echo "Build finished. The HTML page is in $(BUILDDIR)/singlehtml."

pickle:

$(SPHINXBUILD) -b pickle $(ALLSPHINXOPTS) $(BUILDDIR)/pickle

@echo

@echo "Build finished; now you can process the pickle files."

json:

$(SPHINXBUILD) -b json $(ALLSPHINXOPTS) $(BUILDDIR)/json

@echo

@echo "Build finished; now you can process the JSON files."

htmlhelp:

$(SPHINXBUILD) -b htmlhelp $(ALLSPHINXOPTS) $(BUILDDIR)/htmlhelp

@echo

@echo "Build finished; now you can run HTML Help Workshop with the" \

".hhp project file in $(BUILDDIR)/htmlhelp."

qthelp:

$(SPHINXBUILD) -b qthelp $(ALLSPHINXOPTS) $(BUILDDIR)/qthelp

@echo

@echo "Build finished; now you can run "qcollectiongenerator" with the" \

".qhcp project file in $(BUILDDIR)/qthelp, like this:"

@echo "# qcollectiongenerator $(BUILDDIR)/qthelp/atomicwrites.qhcp"

@echo "To view the help file:"

@echo "# assistant -collectionFile $(BUILDDIR)/qthelp/atomicwrites.qhc"

devhelp:

$(SPHINXBUILD) -b devhelp $(ALLSPHINXOPTS) $(BUILDDIR)/devhelp

@echo

@echo "Build finished."

@echo "To view the help file:"

@echo "# mkdir -p $$HOME/.local/share/devhelp/atomicwrites"

@echo "# ln -s $(BUILDDIR)/devhelp $$HOME/.local/share/devhelp/atomicwrites"

@echo "# devhelp"

epub:

$(SPHINXBUILD) -b epub $(ALLSPHINXOPTS) $(BUILDDIR)/epub

@echo

@echo "Build finished. The epub file is in $(BUILDDIR)/epub."

latex:

$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex

@echo

@echo "Build finished; the LaTeX files are in $(BUILDDIR)/latex."

@echo "Run \`make' in that directory to run these through (pdf)latex" \

"(use \`make latexpdf' here to do that automatically)."

latexpdf:

$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex

@echo "Running LaTeX files through pdflatex..."

$(MAKE) -C $(BUILDDIR)/latex all-pdf

@echo "pdflatex finished; the PDF files are in $(BUILDDIR)/latex."

latexpdfja:

$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex

@echo "Running LaTeX files through platex and dvipdfmx..."

$(MAKE) -C $(BUILDDIR)/latex all-pdf-ja

@echo "pdflatex finished; the PDF files are in $(BUILDDIR)/latex."

text:

$(SPHINXBUILD) -b text $(ALLSPHINXOPTS) $(BUILDDIR)/text

@echo

@echo "Build finished. The text files are in $(BUILDDIR)/text."

man:

$(SPHINXBUILD) -b man $(ALLSPHINXOPTS) $(BUILDDIR)/man

@echo

@echo "Build finished. The manual pages are in $(BUILDDIR)/man."

texinfo:

$(SPHINXBUILD) -b texinfo $(ALLSPHINXOPTS) $(BUILDDIR)/texinfo

@echo

@echo "Build finished. The Texinfo files are in $(BUILDDIR)/texinfo."

@echo "Run \`make' in that directory to run these through makeinfo" \

"(use \`make info' here to do that automatically)."

info:

$(SPHINXBUILD) -b texinfo $(ALLSPHINXOPTS) $(BUILDDIR)/texinfo

@echo "Running Texinfo files through makeinfo..."

make -C $(BUILDDIR)/texinfo info

@echo "makeinfo finished; the Info files are in $(BUILDDIR)/texinfo."

gettext:

$(SPHINXBUILD) -b gettext $(I18NSPHINXOPTS) $(BUILDDIR)/locale

@echo

@echo "Build finished. The message catalogs are in $(BUILDDIR)/locale."

changes:

$(SPHINXBUILD) -b changes $(ALLSPHINXOPTS) $(BUILDDIR)/changes

@echo

@echo "The overview file is in $(BUILDDIR)/changes."

linkcheck:

$(SPHINXBUILD) -b linkcheck $(ALLSPHINXOPTS) $(BUILDDIR)/linkcheck

@echo

@echo "Link check complete; look for any errors in the above output " \

"or in $(BUILDDIR)/linkcheck/output.txt."

doctest:

$(SPHINXBUILD) -b doctest $(ALLSPHINXOPTS) $(BUILDDIR)/doctest

@echo "Testing of doctests in the sources finished, look at the " \

"results in $(BUILDDIR)/doctest/output.txt."

xml:

$(SPHINXBUILD) -b xml $(ALLSPHINXOPTS) $(BUILDDIR)/xml

@echo

@echo "Build finished. The XML files are in $(BUILDDIR)/xml."

pseudoxml:

$(SPHINXBUILD) -b pseudoxml $(ALLSPHINXOPTS) $(BUILDDIR)/pseudoxml

@echo

@echo "Build finished. The pseudo-XML files are in $(BUILDDIR)/pseudoxml."