api to help clean up created paths when errors occir in recipe install
and update methods.

Made sure buildout exited with a non-zeo exit status when errors
occurred.


git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@75648 62d5b8a3-27da-0310-9561-8e5933582275

git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@75601 62d5b8a3-27da-0310-9561-8e5933582275

https://bugs.launchpad.net/zc.buildout/+bug/71353


git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@75600 62d5b8a3-27da-0310-9561-8e5933582275

Now use  system setuptools  if it is  available.  This can  also speed
bootstrapping,  since we  don't need  to download  setuptools  in more
cases.


git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@75593 62d5b8a3-27da-0310-9561-8e5933582275

https://bugs.launchpad.net/zc.buildout/+bug/105081.


git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@75592 62d5b8a3-27da-0310-9561-8e5933582275

packages that can't be found or that cause version conflicts.


git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@75589 62d5b8a3-27da-0310-9561-8e5933582275

packages that can't be found or that cause version conflicts.

Fixed a renormalizer to prevent spurious test failures,


git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@75588 62d5b8a3-27da-0310-9561-8e5933582275

packages that can't be found or that cause version conflicts.

Download caches didn't work on mac os x if directories in the download
cache path were symbolic links.


git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@75587 62d5b8a3-27da-0310-9561-8e5933582275

git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@75586 62d5b8a3-27da-0310-9561-8e5933582275

git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@73963 62d5b8a3-27da-0310-9561-8e5933582275

git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@73399 62d5b8a3-27da-0310-9561-8e5933582275

git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@73398 62d5b8a3-27da-0310-9561-8e5933582275

git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@73397 62d5b8a3-27da-0310-9561-8e5933582275

git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@73346 62d5b8a3-27da-0310-9561-8e5933582275

git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@73345 62d5b8a3-27da-0310-9561-8e5933582275

git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@73344 62d5b8a3-27da-0310-9561-8e5933582275

git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@73343 62d5b8a3-27da-0310-9561-8e5933582275

git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@73341 62d5b8a3-27da-0310-9561-8e5933582275

git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@73340 62d5b8a3-27da-0310-9561-8e5933582275

git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@73339 62d5b8a3-27da-0310-9561-8e5933582275

git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@73338 62d5b8a3-27da-0310-9561-8e5933582275

This led to a pretty major refactoring.


git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@73327 62d5b8a3-27da-0310-9561-8e5933582275

git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@73326 62d5b8a3-27da-0310-9561-8e5933582275

It wasn't possible to give options on the command line for sections
not defined in a configuration file.


git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@73325 62d5b8a3-27da-0310-9561-8e5933582275

git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@73187 62d5b8a3-27da-0310-9561-8e5933582275

git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@73186 62d5b8a3-27da-0310-9561-8e5933582275

  to avoid database corruption when a user breaks out of a buildout
  with control-c.

- Don't save an installed database if there are no installed parts or
  develop egg links.


git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@73178 62d5b8a3-27da-0310-9561-8e5933582275

git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@73131 62d5b8a3-27da-0310-9561-8e5933582275

sections.


git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@73130 62d5b8a3-27da-0310-9561-8e5933582275

Treat DistutilsErrors as user errors.


git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@73126 62d5b8a3-27da-0310-9561-8e5933582275

git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@73125 62d5b8a3-27da-0310-9561-8e5933582275

- Added "logical tracebacks" that show functionally what the buildout
  was doing when an error occurs.  Don't show a Python traceback
  unless the -D option is used.

- Added a -D option that causes the buildout to print a traceback and
  start the pdb post-mortem debugger when an error occurs.


git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@73082 62d5b8a3-27da-0310-9561-8e5933582275

git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@73070 62d5b8a3-27da-0310-9561-8e5933582275

git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@73019 62d5b8a3-27da-0310-9561-8e5933582275

git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@73018 62d5b8a3-27da-0310-9561-8e5933582275

be specified in a versions section.

Changed the log format for picked versions.


git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@73017 62d5b8a3-27da-0310-9561-8e5933582275

This will allow a versions feature to be added without updating all
recipes initially.  Later, recipes that support custom versions will
be able to override the defaults by passing options.


git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@73015 62d5b8a3-27da-0310-9561-8e5933582275

- The easy_install module install and build functions now accept a
  versions argument that supplied to mapping from project name to
  version numbers.  This can be used to fix version numbers for
  required distributions and their depenencies.

When a version isn't fixed, using either a versions option or using
  a fixed version number in a requirement, then a debug log message is
  emitted indicating the version picked.  This is useful for setting
  versions options.

- Added a remove testing helper function that removes files or directories.


git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@73006 62d5b8a3-27da-0310-9561-8e5933582275

no longer causes voluminous setuptools output.  Uisng -vv and -vvv
now triggers extra setuptools output.

Improved a logging message.


git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@72980 62d5b8a3-27da-0310-9561-8e5933582275

git-svn-id: http://svn.zope.org/repos/main/zc.buildout/trunk@72979 62d5b8a3-27da-0310-9561-8e5933582275