Added more value inference for dbutils.notebook.run(...)

src/databricks/labs/ucx/source_code/graph.py

@@ -191,19 +191,31 @@ def build_graph_from_python_source(self, python_code: str) -> list[DependencyPro
     def _process_node(self, base_node: NodeBase):
         if isinstance(base_node, SysPathChange):
             self._mutate_path_lookup(base_node)
+            return
         if isinstance(base_node, NotebookRunCall):
-            strpath = base_node.get_notebook_path()
-            if strpath is None:
-                yield DependencyProblem('dependency-not-constant', "Can't check dependency not provided as a constant")
-            else:
-                yield from self.register_notebook(Path(strpath))
+            yield from self._register_notebook(base_node)
+            return
         if isinstance(base_node, ImportSource):
             prefix = ""
             if isinstance(base_node.node, ImportFrom) and base_node.node.level is not None:
                 prefix = "." * base_node.node.level
             name = base_node.name or ""
             yield from self.register_import(prefix + name)
 
+    def _register_notebook(self, base_node: NotebookRunCall):
+        paths = base_node.get_notebook_paths()
+        asserted = False
+        for path in paths:
+            if isinstance(path, str):
+                yield from self.register_notebook(Path(path))
+                continue
+            if not asserted:
+                asserted = True
+                yield DependencyProblem(
+                    'dependency-cannot-compute',
+                    f"Can't check dependency from {base_node.node.as_string()} because the expression cannot be computed",
+                )
+
     def _mutate_path_lookup(self, change: SysPathChange):
         path = Path(change.path)
         if not path.is_absolute():

src/databricks/labs/ucx/source_code/linters/imports.py

@@ -9,6 +9,7 @@
     Attribute,
     Call,
     Const,
+    InferenceError,
     Import,
     ImportFrom,
     Name,
@@ -81,12 +82,28 @@ class NotebookRunCall(NodeBase):
     def __init__(self, node: Call):
         super().__init__(node)
 
-    def get_notebook_path(self) -> str | None:
-        node = DbutilsLinter.get_dbutils_notebook_run_path_arg(cast(Call, self.node))
-        inferred = next(node.infer(), None)
-        if isinstance(inferred, Const):
-            return inferred.value.strip().strip("'").strip('"')
-        return None
+    def get_notebook_paths(self) -> list[str | None]:
+        """we return multiple paths because astroid can infer them in scenarios such as:
+        paths = ["p1", "p2"]
+        for path in paths:
+            dbutils.notebook.run(path)
+        """
+        node = DbutilsLinter.get_dbutils_notebook_run_path_arg(self.node)
+        try:
+            return self._get_notebook_paths(node.infer())
+        except InferenceError:
+            logger.debug(f"Can't infer value(s) of {node.as_string()}")
+            return [None]
+
+    @classmethod
+    def _get_notebook_paths(cls, nodes: Iterable[NodeNG]) -> list[str | None]:
+        paths: list[str | None] = []
+        for node in nodes:
+            if isinstance(node, Const):
+                paths.append(node.as_string().strip("'").strip('"'))
+                continue
+            paths.append(None)
+        return paths
 
 
 class DbutilsLinter(Linter):
@@ -99,16 +116,17 @@ def lint(self, code: str) -> Iterable[Advice]:
     @classmethod
     def _convert_dbutils_notebook_run_to_advice(cls, node: NodeNG) -> Advisory:
         assert isinstance(node, Call)
-        path = cls.get_dbutils_notebook_run_path_arg(node)
-        if isinstance(path, Const):
+        call = NotebookRunCall(cast(Call, node))
+        paths = call.get_notebook_paths()
+        if None in paths:
             return Advisory.from_node(
-                'dbutils-notebook-run-literal',
-                "Call to 'dbutils.notebook.run' will be migrated automatically",
+                'dbutils-notebook-run-dynamic',
+                "Path for 'dbutils.notebook.run' cannot be computed and requires adjusting the notebook path(s)",
                 node=node,
             )
         return Advisory.from_node(
-            'dbutils-notebook-run-dynamic',
-            "Path for 'dbutils.notebook.run' is not a constant and requires adjusting the notebook path",
+            'dbutils-notebook-run-literal',
+            "Call to 'dbutils.notebook.run' will be migrated automatically",
             node=node,
         )
 

src/databricks/labs/ucx/source_code/notebooks/loaders.py

@@ -14,7 +14,7 @@
     SourceContainer,
 )
 from databricks.labs.ucx.source_code.notebooks.cells import CellLanguage
-from databricks.labs.ucx.source_code.notebooks.sources import Notebook
+from databricks.labs.ucx.source_code.notebooks.sources import Notebook, SUPPORTED_EXTENSION_LANGUAGES
 from databricks.labs.ucx.source_code.path_lookup import PathLookup
 
 logger = logging.getLogger(__name__)
@@ -55,17 +55,20 @@ def load_dependency(self, path_lookup: PathLookup, dependency: Dependency) -> So
         except NotFound:
             logger.warning(f"Could not read notebook from workspace: {absolute_path}")
             return None
-        language = self._detect_language(content)
+        language = self._detect_language(absolute_path, content)
         if not language:
             logger.warning(f"Could not detect language for {absolute_path}")
             return None
         return Notebook.parse(absolute_path, content, language)
 
     @staticmethod
-    def _detect_language(content: str):
-        for language in CellLanguage:
-            if content.startswith(language.file_magic_header):
-                return language.language
+    def _detect_language(path: Path, content: str):
+        language = SUPPORTED_EXTENSION_LANGUAGES.get(path.suffix, None)
+        if language:
+            return language
+        for cell_language in CellLanguage:
+            if content.startswith(cell_language.file_magic_header):
+                return cell_language.language
         return None
 
     @staticmethod

tests/unit/source_code/linters/test_python_ast.py

@@ -0,0 +1,85 @@
+import pytest
+from astroid import Attribute, Call, Const, Expr  # type: ignore
+
+from databricks.labs.ucx.source_code.linters.python_ast import Tree
+
+
+def test_extract_call_by_name():
+    tree = Tree.parse("o.m1().m2().m3()")
+    stmt = tree.first_statement()
+    assert isinstance(stmt, Expr)
+    assert isinstance(stmt.value, Call)
+    act = Tree.extract_call_by_name(stmt.value, "m2")
+    assert isinstance(act, Call)
+    assert isinstance(act.func, Attribute)
+    assert act.func.attrname == "m2"
+
+
+def test_extract_call_by_name_none():
+    tree = Tree.parse("o.m1().m2().m3()")
+    stmt = tree.first_statement()
+    assert isinstance(stmt, Expr)
+    assert isinstance(stmt.value, Call)
+    act = Tree.extract_call_by_name(stmt.value, "m5000")
+    assert act is None
+
+
+@pytest.mark.parametrize(
+    "code, arg_index, arg_name, expected",
+    [
+        ("o.m1()", 1, "second", None),
+        ("o.m1(3)", 1, "second", None),
+        ("o.m1(first=3)", 1, "second", None),
+        ("o.m1(4, 3)", None, None, None),
+        ("o.m1(4, 3)", None, "second", None),
+        ("o.m1(4, 3)", 1, "second", 3),
+        ("o.m1(4, 3)", 1, None, 3),
+        ("o.m1(first=4, second=3)", 1, "second", 3),
+        ("o.m1(second=3, first=4)", 1, "second", 3),
+        ("o.m1(second=3, first=4)", None, "second", 3),
+        ("o.m1(second=3)", 1, "second", 3),
+        ("o.m1(4, 3, 2)", 1, "second", 3),
+    ],
+)
+def test_linter_gets_arg(code, arg_index, arg_name, expected):
+    tree = Tree.parse(code)
+    stmt = tree.first_statement()
+    assert isinstance(stmt, Expr)
+    assert isinstance(stmt.value, Call)
+    act = Tree.get_arg(stmt.value, arg_index, arg_name)
+    if expected is None:
+        assert act is None
+    else:
+        assert isinstance(act, Const)
+        assert act.value == expected
+
+
+@pytest.mark.parametrize(
+    "code, expected",
+    [
+        ("o.m1()", 0),
+        ("o.m1(3)", 1),
+        ("o.m1(first=3)", 1),
+        ("o.m1(3, 3)", 2),
+        ("o.m1(first=3, second=3)", 2),
+        ("o.m1(3, second=3)", 2),
+        ("o.m1(3, *b, **c, second=3)", 4),
+    ],
+)
+def test_args_count(code, expected):
+    tree = Tree.parse(code)
+    stmt = tree.first_statement()
+    assert isinstance(stmt, Expr)
+    assert isinstance(stmt.value, Call)
+    act = Tree.args_count(stmt.value)
+    assert act == expected
+
+
+def test_tree_walks_nodes_once():
+    nodes = set()
+    count = 0
+    tree = Tree.parse("o.m1().m2().m3()")
+    for node in tree.walk():
+        nodes.add(node)
+        count += 1
+    assert len(nodes) == count

tests/unit/source_code/linters/test_python_imports.py

@@ -1,8 +1,10 @@
 from __future__ import annotations
 
+import functools
+import operator
 
 import pytest
-from astroid import Attribute, Call, Const, Expr  # type: ignore
+
 from databricks.labs.ucx.source_code.graph import DependencyProblem
 
 from databricks.labs.ucx.source_code.linters.imports import DbutilsLinter, ImportSource, SysPathChange
@@ -137,77 +139,6 @@ def test_linter_returns_appended_relative_paths_with_os_path_abspath_alias():
     assert "relative_path" in [p.path for p in appended]
 
 
-def test_extract_call_by_name():
-    tree = Tree.parse("o.m1().m2().m3()")
-    stmt = tree.first_statement()
-    assert isinstance(stmt, Expr)
-    assert isinstance(stmt.value, Call)
-    act = Tree.extract_call_by_name(stmt.value, "m2")
-    assert isinstance(act, Call)
-    assert isinstance(act.func, Attribute)
-    assert act.func.attrname == "m2"
-
-
-def test_extract_call_by_name_none():
-    tree = Tree.parse("o.m1().m2().m3()")
-    stmt = tree.first_statement()
-    assert isinstance(stmt, Expr)
-    assert isinstance(stmt.value, Call)
-    act = Tree.extract_call_by_name(stmt.value, "m5000")
-    assert act is None
-
-
-@pytest.mark.parametrize(
-    "code, arg_index, arg_name, expected",
-    [
-        ("o.m1()", 1, "second", None),
-        ("o.m1(3)", 1, "second", None),
-        ("o.m1(first=3)", 1, "second", None),
-        ("o.m1(4, 3)", None, None, None),
-        ("o.m1(4, 3)", None, "second", None),
-        ("o.m1(4, 3)", 1, "second", 3),
-        ("o.m1(4, 3)", 1, None, 3),
-        ("o.m1(first=4, second=3)", 1, "second", 3),
-        ("o.m1(second=3, first=4)", 1, "second", 3),
-        ("o.m1(second=3, first=4)", None, "second", 3),
-        ("o.m1(second=3)", 1, "second", 3),
-        ("o.m1(4, 3, 2)", 1, "second", 3),
-    ],
-)
-def test_linter_gets_arg(code, arg_index, arg_name, expected):
-    tree = Tree.parse(code)
-    stmt = tree.first_statement()
-    assert isinstance(stmt, Expr)
-    assert isinstance(stmt.value, Call)
-    act = Tree.get_arg(stmt.value, arg_index, arg_name)
-    if expected is None:
-        assert act is None
-    else:
-        assert isinstance(act, Const)
-        assert act.value == expected
-
-
-@pytest.mark.parametrize(
-    "code, expected",
-    [
-        ("o.m1()", 0),
-        ("o.m1(3)", 1),
-        ("o.m1(first=3)", 1),
-        ("o.m1(3, 3)", 2),
-        ("o.m1(first=3, second=3)", 2),
-        ("o.m1(3, second=3)", 2),
-        ("o.m1(3, *b, **c, second=3)", 4),
-    ],
-)
-def test_args_count(code, expected):
-    tree = Tree.parse(code)
-    stmt = tree.first_statement()
-    assert isinstance(stmt, Expr)
-    assert isinstance(stmt.value, Call)
-    act = Tree.args_count(stmt.value)
-    assert act == expected
-
-
 @pytest.mark.parametrize(
     "code, expected",
     [
@@ -216,22 +147,27 @@ def test_args_count(code, expected):
 name = "xyz"
 dbutils.notebook.run(name)
 """,
-            "xyz",
-        )
+            ["xyz"],
+        ),
+        (
+            """
+name = "xyz" + "-" + "abc"
+dbutils.notebook.run(name)
+""",
+            ["xyz-abc"],
+        ),
+        (
+            """
+names = ["abc", "xyz"]
+for name in names:
+    dbutils.notebook.run(name)
+""",
+            ["abc", "xyz"],
+        ),
     ],
 )
-def test_infers_string_variable_value(code, expected):
+def test_infers_dbutils_notebook_run_dynamic_value(code, expected):
     tree = Tree.parse(code)
     calls = DbutilsLinter.list_dbutils_notebook_run_calls(tree)
-    actual = list(call.get_notebook_path() for call in calls)
-    assert [expected] == actual
-
-
-def test_tree_walker_walks_nodes_once():
-    nodes = set()
-    count = 0
-    tree = Tree.parse("o.m1().m2().m3()")
-    for node in tree.walk():
-        nodes.add(node)
-        count += 1
-    assert len(nodes) == count
+    actual = functools.reduce(operator.iconcat, list(call.get_notebook_paths() for call in calls), [])
+    assert expected == actual

tests/unit/source_code/notebooks/test_loader.py

@@ -0,0 +1,19 @@
+from pathlib import Path
+
+from databricks.labs.ucx.source_code.notebooks.loaders import NotebookLoader
+from databricks.sdk.service.workspace import Language
+
+
+def test_detects_language():
+
+    class NotebookLoaderForTesting(NotebookLoader):
+
+        @classmethod
+        def detect_language(cls, path: Path, content: str):
+            return cls._detect_language(path, content)
+
+    assert NotebookLoaderForTesting.detect_language(Path("hi.py"), "stuff") == Language.PYTHON
+    assert NotebookLoaderForTesting.detect_language(Path("hi.sql"), "stuff") == Language.SQL
+    assert NotebookLoaderForTesting.detect_language(Path("hi"), "# Databricks notebook source") == Language.PYTHON
+    assert NotebookLoaderForTesting.detect_language(Path("hi"), "-- Databricks notebook source") == Language.SQL
+    assert not NotebookLoaderForTesting.detect_language(Path("hi"), "stuff")

tests/unit/source_code/samples/functional/missing-resolved-notebook.py

@@ -0,0 +1,7 @@
+# Databricks notebook source
+a = "./leaf1.py"
+# ucx[dbutils-notebook-run-literal:+1:0:+1:23] Call to 'dbutils.notebook.run' will be migrated automatically
+dbutils.notebook.run(a)
+b = some_function()
+# ucx[dbutils-notebook-run-dynamic:+1:0:+1:23] Path for 'dbutils.notebook.run' cannot be computed and requires adjusting the notebook path(s)
+dbutils.notebook.run(b)