gnu: Add python-typer.

* gnu/packages/python-xyz.scm (python-typer): New variable.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu/packages/python-xyz.scm

@@ -18182,6 +18182,61 @@ based on the CPython 2.7 and 3.7 parsers.")
                    license:asl2.0
                    license:expat))))    ;ast27/Parser/spark.py
 
+(define-public python-typer
+  (package
+    (name "python-typer")
+    (version "0.3.2")
+    (source
+     (origin
+       ;; Building `python-typer` from the git repository requires the `flit-core`
+       ;; Python package that is not installed by `python-flit`.
+       (method url-fetch)
+       (uri (pypi-uri "typer" version))
+       (sha256
+        (base32 "00v3h63dq8yxahp9vg3yb9r27l2niwv8gv0dbds9dzrc298dfmal"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-before 'check 'disable-failing-tests
+           (lambda _
+             (substitute* "tests/test_completion/test_completion.py"
+               (("def test_show_completion")
+                "def _test_show_completion")
+               (("def test_install_completion")
+                "def _test_install_completion"))
+             (substitute* "tests/test_completion/test_completion_install.py"
+               (("def test_completion_install_bash")
+                "def _test_completion_install_bash")
+               (("def test_completion_install_zsh")
+                "def _test_completion_install_zsh")
+               (("def test_completion_install_fish")
+                "def _test_completion_install_fish")
+               (("def test_completion_install_powershell")
+                "def _test_completion_install_powershell"))
+             #t))
+         (replace 'check
+           (lambda _
+             (setenv "PYTHONPATH"
+                     (string-append (getcwd) ":"
+                                    (getenv "PYTHONPATH")))
+             (invoke "python" "-m" "pytest" "tests/")
+             #t)))))
+    (propagated-inputs
+     `(("python-click" ,python-click)))
+    (native-inputs
+     `(("python-coverage" ,python-coverage)
+       ("python-pytest" ,python-pytest)
+       ("python-shellingham" ,python-shellingham)))
+    (home-page "https://github.com/tiangolo/typer")
+    (synopsis
+      "Typer builds CLI based on Python type hints")
+    (description
+      "Typer is a library for building CLI applications.  It's based on
+Python 3.6+ type hints.")
+    ;; MIT license
+    (license license:expat)))
+
 (define-public python-typing
   (package
     (name "python-typing")