Add option 'promises'

slapos/recipe/cmmi/README.txt

@@ -158,6 +158,14 @@ Supported options
     compile directory is stored in ``options['compile-directory']``.
     Accepted values are ``true`` or ``false``, defaults to ``false``.
 
+``promises``
+
+   List the pathes and files should be existed after install part. The
+   file or path must be absolute path. One line one item
+
+   If any item doesn't exist, the recipe shows a warning message. The
+   default value is empty.
+
 ``dependencies``
 
    List all the depended parts:
@@ -279,7 +287,7 @@ Let's create a buildout to build and install the package.
     >>> write('buildout.cfg',
     ... """
     ... [buildout]
-    ... newest = false
+    ... newest = true
     ... parts = package
     ...
     ... [package]
@@ -298,6 +306,33 @@ default build options.
     building package
     installing package
 
+Check option "promises"
+
+    >>> write('buildout.cfg',
+    ... """
+    ... [buildout]
+    ... newest = false
+    ... parts = packagex
+    ...
+    ... [packagex]
+    ... recipe = slapos.recipe.cmmi
+    ... url = file://%s/package-0.0.0.tar.gz
+    ... promises = /usr/bin/myfoo
+    ... """ % src)
+
+This will download, extract and build our demo package with the
+default build options.
+
+    >>> print system(buildout)
+    Uninstalling package.
+    Installing packagex.
+    packagex: [ENV] TMP = /sample_buildout/parts/packagex/tmp
+    packagex: Extracting package to /sample_buildout/parts/packagex__compile__
+    configure --prefix=/sample_buildout/parts/packagex
+    building package
+    installing package
+    packagex: could not find promise "/usr/bin/myfoo"
+
 As we can see the configure script was called with the ``--prefix``
 option by default followed by calls to ``make`` and ``make install``.
 

slapos/recipe/cmmi/__init__.py

@@ -43,6 +43,7 @@ class Recipe(object):
         options['prefix'] = options['location'] if prefix == '' else prefix
         options['url'] = options.get('url', '').strip()
         options['path'] = options.get('path', '').strip()
+        options['promises'] = options.get('promises', '')
 
         # Check dependencies, all the dependent parts will be installed first. It
         # seems once part is referenced, for example, self.buildout[part], it will
@@ -180,6 +181,15 @@ class Recipe(object):
             raise zc.buildout.UserError('System error')
         return files.split()
         
+    def check_promises(self):
+        result = True
+        log = logging.getLogger(self.name)        
+        for path in self.options['promises'].splitlines():
+            if not os.path.exists(path):
+                result = False
+                log.warning('could not find promise "%s"' % path)
+        return result
+        
     def call_script(self, script):
         """This method is copied from z3c.recipe.runscript.
 
@@ -342,6 +352,9 @@ class Recipe(object):
             os.chdir(current_dir)
             shutil.rmtree(tmp_path)
 
+        # Check promises
+        self.check_promises()
+        
         if self.options['url']:
             if self.options.get('keep-compile-dir',
                 self.buildout['buildout'].get('keep-compile-dir', '')).lower() in ('true', 'yes', '1', 'on'):