simplify relative import normalization; add more cases with full imports

Signed-off-by: Denys Smirnov <[email protected]>

Author: Denys Smirnov

driver/normalizer/normalizer.go

@@ -444,7 +444,6 @@ var Normalizers = []Mapping{
 					// FIXME: no position for the module (path) in the native AST, only when the import starts
 					numLevel: Var("level"),
 					path:     Var("module"),
-					joined:   Var("joined"),
 					prefix:   "../",
 				},
 			}),
@@ -468,7 +467,6 @@ var Normalizers = []Mapping{
 				"Name": OpPrependPath{
 					numLevel: Var("level"),
 					path:     Var("module"),
-					joined:   Var("joined"),
 					prefix:   "../",
 				},
 			}),

driver/normalizer/util.go

@@ -19,7 +19,6 @@ func num2dots(n nodes.Value, prefix string) nodes.Value {
 type OpPrependPath struct {
 	numLevel Op
 	path     Op
-	joined   Op
 	prefix   string
 }
 
@@ -58,16 +57,7 @@ func (op OpPrependPath) Construct(st *State, n nodes.Node) (nodes.Node, error) {
 	if err != nil || path == nil {
 		return n, err
 	}
-
-	joined := string(prependVal.(nodes.String)) + string(path.(nodes.String))
-	op.joined = String(joined)
-
-	v, err := op.joined.Construct(st, n)
-	if err != nil {
-		return nil, err
-	}
-
-	return v, nil
+	return prependVal.(nodes.String) + path.(nodes.String), nil
 }
 
 type OpLevelDotsNumConv struct {

fixtures/u2_import_relativepath.py

@@ -1,3 +1,3 @@
 from .a import b
-from ..c import e
+from ..c.d import e
 from ... import f

fixtures/u2_import_relativepath.py.native

@@ -21,11 +21,9 @@
          {
             'ast_type': "ImportFrom",
             'col_offset': 1,
-            'end_col_offset': 9,
-            'end_lineno': 2,
             level: 2,
             lineno: 2,
-            module: "c",
+            module: "c.d",
             names: [
                {
                   asname: ~,

fixtures/u2_import_relativepath.py.sem.uast

@@ -36,11 +36,6 @@
                line: 2,
                col: 1,
             },
-            end: { '@type': "uast:Position",
-               offset: 25,
-               line: 2,
-               col: 9,
-            },
          },
          All: false,
          Names: [
@@ -51,14 +46,14 @@
             },
          ],
          Path: { '@type': "uast:Identifier",
-            Name: "../../c",
+            Name: "../../c.d",
          },
          Target: ~,
       },
       { '@type': "uast:RuntimeImport",
          '@pos': { '@type': "uast:Positions",
             start: { '@type': "uast:Position",
-               offset: 35,
+               offset: 37,
                line: 3,
                col: 1,
             },

fixtures/u2_import_relativepath.py.uast

@@ -50,18 +50,13 @@
                line: 2,
                col: 1,
             },
-            end: { '@type': "uast:Position",
-               offset: 25,
-               line: 2,
-               col: 9,
-            },
          },
          level: { '@type': "ImportFrom.level",
             '@token': "..",
             '@role': [Import, Incomplete],
          },
          module: { '@type': "ImportFrom.module",
-            '@token': "c",
+            '@token': "c.d",
             '@role': [Identifier, Import, Pathname],
          },
          names: { '@type': "ImportFrom.names",
@@ -85,7 +80,7 @@
          '@role': [Declaration, Import, Statement],
          '@pos': { '@type': "uast:Positions",
             start: { '@type': "uast:Position",
-               offset: 35,
+               offset: 37,
                line: 3,
                col: 1,
             },

fixtures/u2_import_subsymbol_alias.py

@@ -1,2 +1,2 @@
 import x.y as z
-from a import b as c
+from a.b import c as d

fixtures/u2_import_subsymbol_alias.py.native

@@ -17,16 +17,14 @@
          {
             'ast_type': "ImportFrom",
             'col_offset': 1,
-            'end_col_offset': 7,
-            'end_lineno': 2,
             level: 0,
             lineno: 2,
-            module: "a",
+            module: "a.b",
             names: [
                {
-                  asname: "c",
+                  asname: "d",
                   'ast_type': "alias",
-                  name: "b",
+                  name: "c",
                },
             ],
          },

fixtures/u2_import_subsymbol_alias.py.sem.uast

@@ -32,27 +32,22 @@
                line: 2,
                col: 1,
             },
-            end: { '@type': "uast:Position",
-               offset: 22,
-               line: 2,
-               col: 7,
-            },
          },
          All: false,
          Names: [
             { '@type': "uast:Alias",
                '@pos': { '@type': "uast:Positions",
                },
                Name: { '@type': "uast:Identifier",
-                  Name: "c",
+                  Name: "d",
                },
                Node: { '@type': "uast:Identifier",
-                  Name: "b",
+                  Name: "c",
                },
             },
          ],
          Path: { '@type': "uast:Identifier",
-            Name: "a",
+            Name: "a.b",
          },
          Target: ~,
       },

fixtures/u2_import_subsymbol_alias.py.uast

@@ -37,30 +37,25 @@
                line: 2,
                col: 1,
             },
-            end: { '@type': "uast:Position",
-               offset: 22,
-               line: 2,
-               col: 7,
-            },
          },
          level: { '@type': "ImportFrom.level",
             '@token': "",
             '@role': [Import, Incomplete],
          },
          module: { '@type': "ImportFrom.module",
-            '@token': "a",
+            '@token': "a.b",
             '@role': [Identifier, Import, Pathname],
          },
          names: { '@type': "ImportFrom.names",
             '@role': [Identifier, Import, Incomplete, Pathname],
             'name_list': [
                { '@type': "alias",
-                  '@token': "b",
+                  '@token': "c",
                   '@role': [Identifier, Import, Pathname],
                   '@pos': { '@type': "uast:Positions",
                   },
                   asname: { '@type': "alias.asname",
-                     '@token': "c",
+                     '@token': "d",
                      '@role': [Alias, Identifier, Import, Pathname],
                   },
                },