[bug#42465] [PATCH 05/10] gnu: Add python-libcst.

[Tanguy Le Carrour <tanguy@bioneland.org>]

* gnu/packages/python-xyz.scm (python-libcst): New variable.
---
 gnu/packages/python-xyz.scm | 55 +++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)

diff --git a/gnu/packages/python-xyz.scm b/gnu/packages/python-xyz.scm
index 2293a16ecc..6b462a42f0 100644
--- a/gnu/packages/python-xyz.scm
+++ b/gnu/packages/python-xyz.scm
@@ -12274,6 +12274,61 @@ in Python.  It allows you to declare the libraries your project depends on and
 it will manage (install/update) them for you.")
     (license license:expat)))
 
+(define-public python-libcst
+  (package
+    (name "python-libcst")
+    (version "0.3.7")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "libcst" version))
+              (sha256
+               (base32
+                "1wfd5m9jhk5x2qpz29pjhm9ypp5h3nlbk6xv4vzn4f45xdf5bv9x"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'remove-failing-tests
+           (lambda _
+             ;; Reported upstream: <https://github.com/Instagram/LibCST/issues/346>.
+             (delete-file "libcst/tests/test_fuzz.py")
+             ;; Reported upstream: <https://github.com/Instagram/LibCST/issues/347>.
+             (delete-file "libcst/tests/test_pyre_integration.py")
+             (delete-file "libcst/codemod/tests/test_codemod_cli.py")
+             (delete-file "libcst/metadata/tests/test_full_repo_manager.py")
+             (delete-file "libcst/metadata/tests/test_type_inference_provider.py")
+             #t))
+         (replace 'check
+           (lambda _
+             (setenv "PYTHONPATH" (string-append (getcwd) ":" (getenv "PYTHONPATH")))
+             (invoke "python" "-m" "libcst.codegen.generate" "visitors")
+             (invoke "python" "-m" "libcst.codegen.generate" "return_types")
+             (invoke "python" "-m" "unittest")
+             #t)))))
+    (native-inputs
+     `(("python-black" ,python-black)
+       ("python-hypothesis" ,python-hypothesis)
+       ("python-isort" ,python-isort)))
+    (propagated-inputs
+     `(("python-typing-extensions" ,python-typing-extensions)
+       ("python-typing-inspect" ,python-typing-inspect)
+       ("python-pyyaml" ,python-pyyaml)))
+    (home-page "https://github.com/Instagram/LibCST")
+    (synopsis "A Concrete Syntax Tree (CST) parser and serializer library for Python")
+    (description
+     "LibCST parses Python 3.0, 3.1, 3.3, 3.5, 3.6, 3.7 or 3.8 source code as a CST tree
+that keeps all formatting details (comments, whitespaces, parentheses, etc).  It's useful
+for building automated refactoring (codemod) applications and linters.  LibCST creates
+a compromise between an Abstract Syntax Tree (AST) and a traditional Concrete Syntax
+Tree (CST).  By carefully reorganizing and naming node types and fields, we've created
+a lossless CST that looks and feels like an AST.")
+    (license (list license:expat
+                   ;; Some files unde libcst/_parser/ are under Python Software
+                   ;; Foundation license (see LICENSE file for details)
+                   license:psfl
+                   ;; libcst/_add_slots.py
+                   license:asl2.0))))
+
 (define-public python-typing-inspect
   (package
     (name "python-typing-inspect")
-- 
2.27.0