Improved transformation extraction performance and added support for …

…insertion points (#41)

* added kaskara-backed insert statement transformation

* implemented basic should_insert_at_location for insert statements

* added FileLineSet to core module

* implemented elegant way of lazily computing rooibos transformations

* added all_single_edit_patches helper to generator module

* bug fix: bad return type

* moved all_single_edit_patches to candidate module

* bug fix: added all_single_edit_patches to __all__

* added first implementation of sample_by_localization_and_type

* bug fix: use FileLineSet.from_iter as builder

* use bugzoo v2.1.14

* bug fix: use loop in sample_by_localization_and_type

* bug fix: incorrect handling of exhausted lines

* removed generator module

* require boggart 0.1.12

* suppress erroneous type warning

* increased version to 0.1.10

setup.py

@@ -20,9 +20,9 @@
     license='mit',
     python_requires='>=3.5',
     install_requires=[
-        'bugzoo>=2.1.12',
+        'bugzoo>=2.1.14',
         'rooibos>=0.3.0',
-        'boggart>=0.1.8',
+        'boggart>=0.1.12',
         'kaskara>=0.0.1',
         'attrs>=17.2.0',
         'requests',

src/darjeeling/candidate.py

@@ -1,6 +1,6 @@
-__all__ = ['Candidate']
+__all__ = ['Candidate', 'all_single_edit_patches']
 
-from typing import List, Iterator, Dict, FrozenSet
+from typing import List, Iterator, Dict, FrozenSet, Iterable
 
 import attr
 from bugzoo.core.patch import Patch
@@ -44,3 +44,13 @@ def lines_changed(self, problem: Problem) -> List[FileLine]:
         lines = [FileLine(loc.filename, loc.start.line)
                  for loc in locations]
         return lines
+
+
+def all_single_edit_patches(transformations: Iterable[Transformation]
+                            ) -> Iterable[Candidate]:
+    """
+    Returns an iterator over all of the single-edit patches that can be
+    composed using a provided source of transformations.
+    """
+    for t in transformations:
+        yield Candidate([t])  # type: ignore

src/darjeeling/core.py

@@ -2,4 +2,4 @@
 
 from boggart.core.replacement import Replacement
 from boggart.core.location import FileLocationRange, FileLine, Location, \
-                                  LocationRange, FileLocation
+                                  LocationRange, FileLocation, FileLineSet