Refactored the way recipes are run and how they should be written.

If a recipe uses any data from other sections, the recipe needs to
update it's data when the recipe is constructed.

Need more discussion of this in the docs.

eggrecipe/src/zc/recipe/egg/egg.py

@@ -16,6 +16,7 @@
 $Id$
 """
 
+import os
 import zc.buildout.egglinker
 import zc.buildout.easy_install
 
@@ -25,26 +26,27 @@ class Egg:
         self.buildout = buildout
         self.name = name
         self.options = options
-
-    def install(self):
-        distribution = self.options.get('distribution', self.name)
-        links = self.options.get(
-            'find-links',
-            self.buildout['buildout'].get('find-links'),
-            )
+        links = options.get('find-links',
+                            buildout['buildout'].get('find-links'))
         if links:
-            links = links.split()
+            buildout_directory = buildout['buildout']['directory']
+            links = [os.path.join(buildout_directory, link)
+                     for link in links.split()]
+            options['find-links'] = '\n'.join(links)
         else:
             links = ()
+        self.links = links
 
-        buildout = self.buildout
+        options['_b'] = buildout['buildout']['bin-directory']
+        options['_e'] = buildout['buildout']['eggs-directory']
+
+    def install(self):
+        options = self.options
+        distribution = options.get('distribution', self.name)
         zc.buildout.easy_install.install(
-            distribution,
-            buildout.eggs,
-            [buildout.buildout_path(link) for link in links],
-            )
+            distribution, options['_e'], self.links)
 
-        scripts = self.options.get('scripts')
+        scripts = options.get('scripts')
         if scripts or scripts is None:
             if scripts is not None:
                 scripts = scripts.split()
@@ -53,6 +55,6 @@ class Egg:
                     for s in scripts
                     ])
             return zc.buildout.egglinker.scripts(
-                [distribution], buildout.bin, [buildout.eggs],
-                scripts=scripts)
+                [distribution],
+                options['_b'], [options['_e']], scripts=scripts)
             

src/zc/buildout/buildout.txt

@@ -92,9 +92,13 @@ and then we'll create a source file for our mkdir recipe:
     ...         self.buildout = buildout
     ...         self.name = name
     ...         self.options = options
+    ...         options['path'] = os.path.join(
+    ...                               buildout['buildout']['directory'],
+    ...                               options['path'],
+    ...                               )
     ...
     ...     def install(self):
-    ...         path = self.buildout.buildout_path(self.options['path'])
+    ...         path = self.options['path']
     ...         if not os.path.isdir(path):
     ...             print 'Creating directory', os.path.basename(path)
     ...             os.mkdir(path)
@@ -104,14 +108,21 @@ and then we'll create a source file for our mkdir recipe:
 The recipe defines a constructor that takes a buildout object, a part
 name, and an options dictionary. It saves them in instance attributes.
 
+If the path is relative, we'll interpret it as relative to the
+buildout directory.  The buildout object passed in is a mapping from
+section name to a mapping of options for that section. The buildout
+directory is available as the directory option of the buildout
+section.  We normalize the path and save it back into the options
+directory.  
+
+**IMPORTANT**: Any time we use data from another section, it is important
+to reflect that data in the recipe options, as this data is used to
+decide if a part configuration has changed and a part needs to be
+reinstalled.
+
 The install method is responsible for creating the part.  In this
 case, we need the path of the directory to create.  We'll use a
-buildout option from our options dictionary.  If the path is relative,
-we'll interpret it relative to the buildout directory.  The buildout
-buildout_path method gives us a path relative to the buildout.  It
-uses os.path.join, so if we pass it an absolute path, we'll get the
-absolute path back. (If no arguments are passed to base_path, then the
-buildout directory is returned.)
+path option from our options dictionary.
 
 We made the method chatty so that we can observe what it's doing.
 
@@ -134,14 +145,13 @@ installed as an egg.  We need to define a setup script for this:
     ...     )
     ... """)
 
-Here we've defined a package containing just our module.  We've also
-defined an entry point.  Entry points provide a way for an egg to
-define the services it provides.  Here we've said that we define a
-zc.buildout entry point named default.  Recipe classes must be exposed
-as entry points in the zc.buildout group.  we give entry points names
-within the group.  The name "default" is somewhat special because it
-allows a recipe to be referenced using a package name without naming
-an entry point.
+Here we've defined a package with an entry_point. Entry points provide
+a way for an egg to define the services it provides.  Here we've said
+that we define a zc.buildout entry point named default.  Recipe
+classes must be exposed as entry points in the zc.buildout group.  we
+give entry points names within the group.  The name "default" is
+somewhat special because it allows a recipe to be referenced using a
+package name without naming an entry point.
 
 We also need a README.txt for our recipes to avoid a warning:
 
@@ -219,12 +229,14 @@ installed:
     parts = data_dir
     <BLANKLINE>
     [data_dir]
-    __buildout_installed__ = mystuff
-    __buildout_signature__ = recipes-O3ypTgKOkHMqMwKvMfvHnA==
-    path = mystuff
+    __buildout_installed__ = /tmp/sample-buildout/mystuff
+    __buildout_signature__ = recipes-c7vHV6ekIDUPy/7fjAaYjg==
+    path = /tmp/sample-buildout/mystuff
     recipe = recipes:mkdir
 
 Note that the directory we installed is included in .installed.cfg.
+In addition, the path option includes the actual destination
+directory. 
 
 If we change the name of the directory in the configuration file,
 we'll see that the directory gets removed and recreated:
@@ -639,27 +651,27 @@ configuration and run the buildout in the usual way:
     <BLANKLINE>
     [debug]
     __buildout_installed__ = 
-    __buildout_signature__ = recipes-IX/o5hMSw90MtZVxRpjz0Q==
+    __buildout_signature__ = recipes-PiIFiO8ny5yNZ1S3JfT0xg==
     op1 = 1
     op7 = 7
     recipe = recipes:debug
     <BLANKLINE>
     [d1]
-    __buildout_installed__ = d1
-    __buildout_signature__ = recipes-IX/o5hMSw90MtZVxRpjz0Q==
-    path = d1
+    __buildout_installed__ = /tmp/sample-buildout/d1
+    __buildout_signature__ = recipes-PiIFiO8ny5yNZ1S3JfT0xg==
+    path = /tmp/sample-buildout/d1
     recipe = recipes:mkdir
     <BLANKLINE>
     [d2]
-    __buildout_installed__ = d2
-    __buildout_signature__ = recipes-IX/o5hMSw90MtZVxRpjz0Q==
-    path = d2
+    __buildout_installed__ = /tmp/sample-buildout/d2
+    __buildout_signature__ = recipes-PiIFiO8ny5yNZ1S3JfT0xg==
+    path = /tmp/sample-buildout/d2
     recipe = recipes:mkdir
     <BLANKLINE>
     [d3]
-    __buildout_installed__ = d3
-    __buildout_signature__ = recipes-IX/o5hMSw90MtZVxRpjz0Q==
-    path = d3
+    __buildout_installed__ = /tmp/sample-buildout/d3
+    __buildout_signature__ = recipes-PiIFiO8ny5yNZ1S3JfT0xg==
+    path = /tmp/sample-buildout/d3
     recipe = recipes:mkdir
 
 Now we'll update our configuration file:
@@ -721,33 +733,33 @@ The .installed.cfg is only updated for the recipes that ran:
     <BLANKLINE>
     [debug]
     __buildout_installed__ = 
-    __buildout_signature__ = recipes-IX/o5hMSw90MtZVxRpjz0Q==
+    __buildout_signature__ = recipes-PiIFiO8ny5yNZ1S3JfT0xg==
     op1 = 1
     op7 = 7
     recipe = recipes:debug
     <BLANKLINE>
     [d2]
-    __buildout_installed__ = d2
-    __buildout_signature__ = recipes-IX/o5hMSw90MtZVxRpjz0Q==
-    path = d2
+    __buildout_installed__ = /tmp/sample-buildout/d2
+    __buildout_signature__ = recipes-PiIFiO8ny5yNZ1S3JfT0xg==
+    path = /tmp/sample-buildout/d2
     recipe = recipes:mkdir
     <BLANKLINE>
     [d3]
-    __buildout_installed__ = data3
-    __buildout_signature__ = recipes-IX/o5hMSw90MtZVxRpjz0Q==
-    path = data3
+    __buildout_installed__ = /tmp/sample-buildout/data3
+    __buildout_signature__ = recipes-PiIFiO8ny5yNZ1S3JfT0xg==
+    path = /tmp/sample-buildout/data3
     recipe = recipes:mkdir
     <BLANKLINE>
     [d4]
-    __buildout_installed__ = data4
-    __buildout_signature__ = recipes-IX/o5hMSw90MtZVxRpjz0Q==
-    path = data4
+    __buildout_installed__ = /tmp/sample-buildout/data4
+    __buildout_signature__ = recipes-PiIFiO8ny5yNZ1S3JfT0xg==
+    path = /tmp/sample-buildout/data4
     recipe = recipes:mkdir
     <BLANKLINE>
     [d1]
-    __buildout_installed__ = d1
-    __buildout_signature__ = recipes-IX/o5hMSw90MtZVxRpjz0Q==
-    path = d1
+    __buildout_installed__ = /tmp/sample-buildout/d1
+    __buildout_signature__ = recipes-PiIFiO8ny5yNZ1S3JfT0xg==
+    path = /tmp/sample-buildout/d1
     recipe = recipes:mkdir
 
 Note that the installed data for debug, d1, and d2 haven't changed,

src/zc/buildout/testing.py

@@ -53,7 +53,7 @@ def system(command, input=''):
     return o.read()
 
 def buildoutSetUp(test):
-    sample = tempfile.mkdtemp('buildout-tests')
+    sample = tempfile.mkdtemp('sample-buildout')
     for name in ('bin', 'eggs', 'parts'):
         os.mkdir(os.path.join(sample, name))
 
@@ -118,7 +118,7 @@ def runsetup(d):
         os.chdir(here)
 
 def create_sample_eggs(test):
-    sample = tempfile.mkdtemp('eggtest')
+    sample = tempfile.mkdtemp('sample-eggs')
     test.globs['_sample_eggs_container'] = sample
     test.globs['sample_eggs'] = os.path.join(sample, 'dist')
     write(sample, 'README.txt', '')

src/zc/buildout/tests.py

@@ -94,7 +94,9 @@ def test_suite():
             checker=renormalizing.RENormalizing([
                (re.compile('__buildout_signature__ = recipes-\S+'),
                 '__buildout_signature__ = recipes-SSSSSSSSSSS'),
-               ])
+               (re.compile('\S+sample-(\w+)%s(\S+)' % os.path.sep),
+                r'/sample-\1/\2'),
+                ])
             ),
         doctest.DocFileSuite(
             'egglinker.txt', 'easy_install.txt', 

testrunnerrecipe/src/zc/recipe/testrunner/__init__.py

@@ -25,6 +25,11 @@ class TestRunner:
         self.buildout = buildout
         self.name = name
         self.options = options
+        options['script'] = os.path.join(buildout['buildout']['bin-directory'],
+                                         options.get('script', self.name),
+                                         )
+        options['_e'] = buildout['buildout']['eggs-directory']
+
 
     def install(self):
         distributions = [
@@ -34,13 +39,12 @@ class TestRunner:
             ]
         path = zc.buildout.egglinker.path(
             distributions+['zope.testing'],
-            [self.buildout.eggs],
+            [self.options['_e']],
             )
         locations = [zc.buildout.egglinker.location(distribution,
-                                                    [self.buildout.eggs])
+                                                    [self.options['_e']])
                      for distribution in distributions]
-        script = self.options.get('script', self.name)
-        script = self.buildout.buildout_path('bin', script)
+        script = self.options['script']
         open(script, 'w').write(tests_template % dict(
             PYTHON=sys.executable,
             PATH="',\n  '".join(path),