WIP debugging patches to try shared

slapos/recipe/cmmi/__init__.py

@@ -44,7 +44,7 @@ class Recipe(object):
         if shared:
           # If shard is not a path
           # use default one
-          if not os.path.isdir(shared):
+          if not os.path.isdir(shared): # XXX do we need this ??? isn't it enough to use download cache
             # Check if provide default location in buildout
             shared = buildout['buildout'].get('download-cache', None)
             if not shared:
@@ -57,14 +57,24 @@ class Recipe(object):
           # create shared dir if not exist
           if not os.path.exists(shared):
             os.makedirs(shared)
+
+          self._debug_signature_text = []
+          # compute hash from options
+          # XXX we should include all referenced parts !!!
           m = md5()
+          buildout_directory = buildout['buildout']['directory']
           for k, v in sorted(options.items()):
-            m.update(('%r: %r' % (k, v)).encode())
+            option_signature = ('%r: %r' % (k, v)).encode()
+            log.debug("Updating hash with %s", option_signature)
+            self._debug_signature_text.append(option_signature)
+            assert buildout_directory not in option_signature # XXX or maybe warn and disable cache ?
+            m.update(option_signature)
+
           shared = os.path.join(shared, m.hexdigest())
           log.info('download cache directory  %s set for %s' % (shared, self.name))
 
         options['shared'] = shared
-        options['default-location'] = os.path.join(
+        default_location = options['default-location'] = os.path.join(
             buildout['buildout']['parts-directory'],
             self.name) if shared == '' else shared
         options['location'] = options['default-location'] if shared == '' else shared
@@ -110,6 +120,12 @@ class Recipe(object):
         else:
             options['compile-directory'] = options['path']
 
+        from copy import copy
+        for k, v in copy(options.items()):
+            # XXX options will no longer be reported as unused ?
+            if '@@LOCATION@@' in v:
+                options[k] = v.replace('@@LOCATION@@', default_location)
+
         self.environ = {}
         self.original_environment = os.environ.copy()
 
@@ -336,6 +352,13 @@ class Recipe(object):
         shutil.rmtree(tmp_path, True)
         os.mkdir(tmp_path)
 
+        # Create a debug file with the signatures.
+        if self.options['shared']:
+          with open(os.path.join(
+              self.options["shared"],
+              ".slapos.recipe.cmmi.signature"), 'w') as f:
+            f.write('\n'.join(self._debug_signature_text))
+
         try:
             try:
                 # We support packages that either extract contents to the $PWD
@@ -398,9 +421,12 @@ class Recipe(object):
             except:
                 log.error('Compilation error. The package is left as is at %s where '
                           'you can inspect what went wrong' % os.getcwd())
+                if self.options.get('shared'):
+                  shutil.rmtree(self.options['shared'])
                 raise
         finally:
             os.chdir(current_dir)
+            if os.path.isdir(tmp_path): # if it's in shared it was deleted. XXX use another path ??
               shutil.rmtree(tmp_path)
 
         # Check promises