Add 'prefix' property for chunks within strata

Morph no longer supports setting the prefix using the --prefix
argument / setting. This was only used in tests and during bootstrap.

If a chunk build-depends on a chunk within a stratum which has
a custom prefix, that prefix is appended to the PATH in the build
environment.

1 files changed, 14 insertions, 0 deletions

diff --git a/morphlib/artifact.py b/morphlib/artifact.py
index 5f084384..82680709 100644
--- a/morphlib/artifact.py
+++ b/morphlib/artifact.py
@@ -61,6 +61,20 @@ class Artifact(object):
                                 self.name,
                                 metadata_name)
 
+    def get_dependency_prefix_set(self):
+        '''Collects all install prefixes of this artifact's build dependencies
+
+           If any of the build dependencies of a chunk artifact are installed
+           to non-standard prefixes, we need to add those prefixes to the
+           PATH of the current artifact.
+
+        '''
+        result = set()
+        for d in self.dependencies:
+            if d.source.morphology['kind'] == 'chunk':
+                result.add(d.source.prefix)
+        return result
+
     def __str__(self):  # pragma: no cover
         return '%s|%s' % (self.source, self.name)