Conda-build

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Bug fixes:
----------

* Fix a regression in Windows, where a compiler was a hard requirement, and was not always showing up, anyway. 1049

Contributors:
* msarahan

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Bug fixes / Improvements:
-------------------------

* revert some MSVC activation logic to still call vcvarsall directly in build script
* fix Windows testing for binary prefix replacement (not done on win)
* Add a warning message when conda-build can't create an environment due to unsatisfiable dependencies
* Improve notion of whether a recipe uses a VCS in its metadata, or in its build

Known issues:
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* Environment activation on Windows will not work until Conda 4.1.4 is released. The activate.bat script does not look in the right place for the activate.d folder.
* The test suite on Linux and Mac fails the python-build, python-run, and python-build-run tests, because an errant __conda-version__.txt file is somehow present. It is not clear where it comes from, and each of these tests pass when run individually. If you have mysterious issues, and you use __conda-version__.txt or files like it, please file an issue.

Contributors:
-------------
* msarahan
* patricksnape

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Bug fixes / Improvements:
-------------------------

* Simplify MSVC activation, using distutil's existing logic 1036
* Correctly interpret paths returned from git on windows, trying cygpath, falling back to conda regex 1037
* Fix ability to disable anaconda upload in condarc 1043
* Change environment activation to call activation in scripts, rather than having Python store variables 1044

Contributors:
-------------
* msarahan
* mwcraig
* patricksnape

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New stuff:
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* Add FEATURE_ environment variables for MKL, opt and debugging 978
* add info/about.json file that contains the "about" section of meta.yaml 941
* allow --dirty flag to be passed to conda build command. Skips
download, and provides DIRTY environment variable in build scripts. 973
* Add msys2 paths to build and test environments 979
* add new x86 and x86_64 selectors for Intel platforms 986
* keep original meta.yaml in recipe folder of package; create meta.yaml.rendered in recipe folder. Neither exist when recipe not included. 1004
* add ignore_prefix_files key to build in meta.yaml. Can ignore list of files,
or True to ignore all prefix files. 1008 1009
* Automatically determine patch strip level 1011

Bug fixes/Improvements:
-----------------------
* Lightened requirement that x.x be defined in both build and runtime sections. 650
* Remove info/recipe.json from build conda packages. Superseded by info/recipe/meta.yaml.rendered. 781
* Search for single and double backslashes when finding files that need prefix replacement 962
* Track undefined jinja variables and use them to decide whether to download source 964
* handle patches with p0 or p1 969, 1011, 1020
* only set os.environ for non-None variables 981
* Don't use long prefixes on windows 985
* Fix missing encoding argument 987
* Respect proxy variables more appropriately 989
* Search packages on PyPI, rather than listing them all. Should avoid some timeout errors there. 991
* Fix unix-style paths returned from git on Windows preventing relative paths from providing Jinja2 metadata 995
* improve logic handling "dirty" downloading. Always download when not dirty. 995
* Fix post-build variables when no build section existed in original meta.yaml 999
* Activate _build and _test environments approriately, rather than manipulating PATH directly 1002
* Don't clone git submodules until after first checkout 1025
* Move check_install over from conda.install 1027

Deprecations:
-------------
* __conda_version__.txt and other post-build methods of altering the build
string are marked as deprecated. Prefer Jinja2 templates where possible.
Create issues if this breaks your work.

Contributors:
-------------
* filmor
* ilanschnell
* jschueller
* mingwandroid
* msarahan
* pelson
* stuarteberg
* whitequark

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Features:
* use posix metapackage for cran skeleton packaging (956)

Bug fixes:
* fix output of package paths (extra output was breaking tools). Add tests. (950)
* change default of no_download_source in build.py (for compatibility with conda-build-all) (950)
* fix regression in [] being confused for selectors (957)

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Features:
* added --token and --user flags to pass corresponding information to anaconda upload (921)
* added conda render command that outputs a fully-rendered meta.yaml to either stdout, or to file (with --file) (908)
* support source checkout tools specified in meta.yaml. If source checkout fails at the rendering phase, source checkout and rendering are re-done after the build environment is created. (843, 946)
* fn is now optional when a URL specifies a filename. (942)
* CRAN skeleton generator now uses MSYS2 for Windows support (942)
* conda build & conda render both recursively look for meta.yaml (support conda-forge feedstock submodules) (908)
* Whitelist MAKEFLAGS environment variable. Setting this outside conda build should take effect in your build. Parallelize on *nix by adding -j here, instead of -j${CPU_COUNT} in your build.sh. This helps on CI's, where CPU_COUNT is not always well-behaved. (917)
* Run python_d executable on windows when debug feature is active (724)
* add conda build flag --keep-old-work that temporarily moves your last build, then moves it back after completion. For debugging, when more than one package is involved. (833)
* Allow selectors in imported jinja templates (739)

Bug fixes:
* fixed several instances wherein --skip-existing did not work (897, 945)
* Fully render recipe before outputting build string * fixes empty spots where GIT_* info should have been (923)
* Add MSYS2 path conversion filters to avoid issues with Win 7.1 SDK (900)
* Address PyPI's change of URL format (922,
* Fix invalid gcc "-m 32" flag (916)
* Fix empty section (due to selectors) handling regression (919)
* Fix regression in handling of VS2008 Pro (not Express + VC for Python 2.7). It is important to at least try to run vcvarsall.bat. (913)
* Fix CPAN skeleton generator (handle missing sections better) (912)
* Make test/requires versions match build/requires without additional pinning (907)
* Remove hard-coded CYGWIN path from conda-build's custom PATH (903)
* Source is downloaded before testing, fixing an issue where if build machine and some other test machine had different source, strange things happened. (946)
* Fix regression with Python 3.x fixing shebangs (892)
* Fix conda inspect crashes by using conda-meta info rather than filenames or dist names for package info (947)

Miscellany:
* restore AppVeyor testing for Windows builds (864)
* Build py3.5 on Appveyor (938)
* PEP8 cleanup; use flake8 rather than pyflakes (938)
* limited scope of project locking to avoid lock conflicts between build and rendering (923)
* set up anaconda.org build infrastructure (924)
* on Windows, environment variables are written to the temporary bld.bat in the source work folder. (933)