cherry-picked d3c78d5c

Make sure (???) buildout doesn't downgrade due to defer-final

src/zc/buildout/buildout.py

@@ -277,8 +277,11 @@ class Buildout(UserDict.DictMixin):
 
         versions = options.get('versions')
         if versions:
-            zc.buildout.easy_install.default_versions(dict(self[versions]))
-
+            versions = dict(self[versions])
+            zc.buildout.easy_install.default_versions(versions)
+        else:
+            versions = {}
+        self.versions = versions
 
         self.offline = options.get_bool('offline')
         if self.offline:
@@ -881,13 +884,22 @@ class Buildout(UserDict.DictMixin):
         if not self.newest:
             return
 
-        options = self['buildout']
-
         specs = ['zc.buildout']
         if zc.buildout.easy_install.is_distribute:
             specs.append('distribute')
         else:
             specs.append('setuptools')
+
+        # Prevent downgrading due to prefer-final:
+        options = self['buildout']
+        if not ('zc.buildout-version' in options
+                or
+                'zc.buildout' in self.versions):
+            v = pkg_resources.working_set.find(
+                pkg_resources.Requirement.parse('zc.buildout')
+                ).version
+            options['zc.buildout-version'] = '>=' + v
+
         ws = zc.buildout.easy_install.install(
             [
             (spec + ' ' + options.get(spec+'-version', '')).strip()

src/zc/buildout/buildout.txt

@@ -2259,7 +2259,7 @@ database is shown.
     ... """)
 
     >>> print system(buildout+' -vv'), # doctest: +NORMALIZE_WHITESPACE
-    Installing 'zc.buildout', 'setuptools'.
+    Installing 'zc.buildout >=1.9a1', 'setuptools'.
     We have a develop egg: zc.buildout X.X.
     We have the best distribution that satisfies 'setuptools'.
     Picked: setuptools = V.V
@@ -2293,6 +2293,7 @@ database is shown.
     unzip = false
     use-dependency-links = true
     verbosity = 20
+    zc.buildout-version = >=1.9a1
     <BLANKLINE>
 
 All of these options can be overridden by configuration files or by

src/zc/buildout/repeatable.txt

@@ -124,7 +124,7 @@ about versions used. If we run the buildout in verbose mode without
 specifying a versions section:
 
     >>> print system(buildout+' buildout:versions= -v'), # doctest: +ELLIPSIS
-    Installing 'zc.buildout', 'setuptools'.
+    Installing 'zc.buildout >=1.99', 'setuptools'.
     We have a develop egg: zc.buildout 1.0.0.
     We have the best distribution that satisfies 'setuptools'.
     Picked: setuptools = 0.6
@@ -146,7 +146,7 @@ that we can fix them in a versions section.
 If we run the buildout with the versions section:
 
     >>> print system(buildout+' -v'), # doctest: +ELLIPSIS
-    Installing 'zc.buildout', 'setuptools'.
+    Installing 'zc.buildout >=1.99', 'setuptools'.
     We have a develop egg: zc.buildout 1.0.0.
     We have the best distribution that satisfies 'setuptools'.
     Picked: setuptools = 0.6

src/zc/buildout/tests.py

@@ -321,7 +321,7 @@ if we hadn't required sampley ourselves:
 If we use the verbose switch, we can see where requirements are coming from:
 
     >>> print system(buildout+' -v'), # doctest: +ELLIPSIS
-    Installing 'zc.buildout', 'setuptools'.
+    Installing 'zc.buildout >=1.99', 'setuptools'.
     We have a develop egg: zc.buildout 1.0.0
     We have the best distribution that satisfies 'setuptools'.
     Picked: setuptools = 0.6
@@ -420,7 +420,7 @@ indicate the eggs from site-packages that have been selected.  You'll see
 we have two: demo 0.3 and demoneeded 1.1.
 
     >>> print system(buildout+" -v"),
-    Installing 'zc.buildout', 'setuptools'.
+    Installing 'zc.buildout >=1.9.0', 'setuptools'.
     We have a develop egg: zc.buildout V
     We have the best distribution that satisfies 'setuptools'.
     Picked: setuptools = V
@@ -616,7 +616,7 @@ def create_sections_on_command_line():
     ... ''')
 
     >>> print system(buildout + ' foo:bar=1 -vv'), # doctest: +ELLIPSIS
-    Installing 'zc.buildout', 'setuptools'.
+    Installing 'zc.buildout >=1.99', 'setuptools'.
     ...
     [foo]
     bar = 1
@@ -2801,7 +2801,7 @@ def dealing_with_extremely_insane_dependencies():
     However, if we run in verbose mode, we can see why packages were included:
 
     >>> print system(buildout+' -v'), # doctest: +ELLIPSIS
-    Installing 'zc.buildout', 'setuptools'.
+    Installing 'zc.buildout >=1.9.0', 'setuptools'.
     We have a develop egg: zc.buildout 1.0.0
     We have the best distribution that satisfies 'setuptools'.
     Picked: setuptools = 0.6
@@ -3092,7 +3092,7 @@ The default is prefer-final = false:
     ... ''' % globals())
 
     >>> print system(buildout+' -v'), # doctest: +ELLIPSIS
-    Installing 'zc.buildout', 'setuptools'.
+    Installing 'zc.buildout >=1.99', 'setuptools'.
     ...
     Picked: demo = 0.4c1
     ...
@@ -3114,7 +3114,7 @@ We get the same behavior if we add prefer-final = false
     ... ''' % globals())
 
     >>> print system(buildout+' -v'), # doctest: +ELLIPSIS
-    Installing 'zc.buildout', 'setuptools'.
+    Installing 'zc.buildout >=1.99', 'setuptools'.
     ...
     Picked: demo = 0.4c1
     ...
@@ -3136,7 +3136,7 @@ distributions:
     ... ''' % globals())
 
     >>> print system(buildout+' -v'), # doctest: +ELLIPSIS
-    Installing 'zc.buildout', 'setuptools'.
+    Installing 'zc.buildout >=1.99', 'setuptools'.
     ...
     Picked: demo = 0.3
     ...
@@ -3160,6 +3160,50 @@ We get an error if we specify anything but true or false:
     While:
       Initializing.
     Error: Invalid value for prefer-final option: no
+    """
+
+def wont_downgrade_due_to_prefer_final():
+    r"""
+    If we install a non-final buildout version, we don't want to
+    downgrade just bcause we prefer-final.  If a buildout version
+    isn't specified, either through buildout-version or a versions
+    entry, then buildout-version gets set to >=CURRENT_VERSION.
+
+    >>> write('buildout.cfg',
+    ... '''
+    ... [buildout]
+    ... parts =
+    ... ''')
+    >>> [v] = [l.split('=', 1)[1].strip()
+    ...        for l in system(buildout+' -vv').split('\n')
+    ...        if l.startswith('zc.buildout-version = ')]
+    >>> v == '>=' + pkg_resources.working_set.find(
+    ...         pkg_resources.Requirement.parse('zc.buildout')
+    ...         ).version
+    True
+
+    >>> write('buildout.cfg',
+    ... '''
+    ... [buildout]
+    ... parts =
+    ... zc.buildout-version = >.1
+    ... ''')
+    >>> [l.split('=', 1)[1].strip()
+    ...        for l in system(buildout+' -vv').split('\n')
+    ...        if l.startswith('zc.buildout-version =')]
+    ['>.1']
+
+    >>> write('buildout.cfg',
+    ... '''
+    ... [buildout]
+    ... parts =
+    ... versions = versions
+    ... [versions]
+    ... zc.buildout = 43
+    ... ''')
+    >>> print system(buildout+' -v'), # doctest: +ELLIPSIS
+    Installing...
+    Error: Couldn't find a distribution for 'zc.buildout==43'.
 
     """
 
@@ -3975,6 +4019,8 @@ def test_suite():
                 zc.buildout.testing.normalize_egg_py,
                 zc.buildout.tests.hide_distribute_additions,
                 hide_zip_safe_message,
+                (re.compile(r'zc.buildout-version = >=\S+'), ''),
+                (re.compile(r"Installing 'zc.buildout >=\S+"), ''),
                 (re.compile('__buildout_signature__ = recipes-\S+'),
                  '__buildout_signature__ = recipes-SSSSSSSSSSS'),
                 (re.compile('executable = [\S ]+python\S*', re.I),
@@ -4010,6 +4056,9 @@ def test_suite():
                 zc.buildout.testing.normalize_egg_py,
                 zc.buildout.tests.hide_distribute_additions,
                 hide_zip_safe_message,
+                (re.compile(r"Installing 'zc.buildout >=\S+"), ''),
+                (re.compile(r"Getting distribution for 'zc.buildout >=\S+"),
+                 ''),
                 (re.compile('__buildout_signature__ = recipes-\S+'),
                  '__buildout_signature__ = recipes-SSSSSSSSSSS'),
                 (re.compile('executable = [\S ]+python\S*', re.I),
@@ -4058,6 +4107,9 @@ def test_suite():
                 zc.buildout.testing.normalize_egg_py,
                 normalize_bang,
                 zc.buildout.tests.hide_distribute_additions,
+                (re.compile(r"Installing 'zc.buildout >=\S+"), ''),
+                (re.compile(r"Getting distribution for 'zc.buildout>=\S+"),
+                 ''),
                 (re.compile('99[.]99'), 'NINETYNINE.NINETYNINE'),
                 (re.compile('(zc.buildout|setuptools)-\d+[.]\d+\S*'
                             '-py\d.\d.egg'),
@@ -4133,6 +4185,8 @@ def test_suite():
                 zc.buildout.testing.normalize_egg_py,
                 zc.buildout.tests.hide_distribute_additions,
                 hide_first_index_page_message,
+                (re.compile(r"Installing 'zc.buildout >=\S+"), 'Installing '),
+                (re.compile(r'^(\w+\.)*(Missing\w+: )'), '\2'),
                 (re.compile("buildout: Running \S*setup.py"),
                  'buildout: Running setup.py'),
                 (re.compile('(setuptools|distribute)-\S+-'),
@@ -4151,7 +4205,8 @@ def test_suite():
                     '-q develop -mxN -d /sample-buildout/develop-eggs'
                  ),
                 (re.compile(r'^[*]...'), '...'),
-                # for bug_92891_bootstrap_crashes_with_egg_recipe_in_buildout_section
+                # for 92891
+                # bootstrap_crashes_with_egg_recipe_in_buildout_section
                 (re.compile(r"Unused options for buildout: 'eggs' 'scripts'\."),
                  "Unused options for buildout: 'scripts' 'eggs'."),
                 (re.compile('distribute'), 'setuptools'),

src/zc/buildout/update.txt

@@ -65,7 +65,7 @@ Now if we run the buildout, the buildout will upgrade itself to the
 new versions found in new releases:
 
     >>> print system(buildout),
-    Getting distribution for 'zc.buildout'.
+    Getting distribution for 'zc.buildout>=1.99'.
     Got zc.buildout 99.99.
     Getting distribution for 'setuptools'.
     Got setuptools 99.99.
@@ -200,7 +200,7 @@ directory:
     Creating directory '/sample_buildout2/parts'.
     Creating directory '/sample_buildout2/eggs'.
     Creating directory '/sample_buildout2/develop-eggs'.
-    Getting distribution for 'zc.buildout'.
+    Getting distribution for 'zc.buildout>=1.99'.
     Got zc.buildout 99.99.
     Getting distribution for 'setuptools'.
     Got setuptools 99.99.
@@ -233,7 +233,7 @@ We'll mimic this by passing the argument actually in the command line.
     >>> print system(buildout +
     ...              ' buildout:accept-buildout-test-releases=true'),
     ... # doctest: +NORMALIZE_WHITESPACE
-    Getting distribution for 'zc.buildout'.
+    Getting distribution for 'zc.buildout>=1.99'.
     Got zc.buildout 100.0b1.
     Upgraded:
       zc.buildout version 100.0b1,