python-xyz: Add python-hydra-core.

* guix-science/packages/python-xyz.scm (python-hydra-core): New variable.
* guix-science/packages/python-xyz.scm: Import java.

1 files changed, 63 insertions, 0 deletions

diff --git a/guix-science/packages/python-xyz.scm b/guix-science/packages/python-xyz.scm
index ab9d411..987b1e8 100644
--- a/guix-science/packages/python-xyz.scm
+++ b/guix-science/packages/python-xyz.scm
@@ -3,6 +3,7 @@
 (define-module (guix-science packages python-xyz)
   #:use-module (gnu packages check)
   #:use-module (gnu packages image-processing)
+  #:use-module (gnu packages java)
   #:use-module (gnu packages machine-learning)
   #:use-module (gnu packages maths)
   #:use-module (gnu packages pdf)
@@ -337,6 +338,68 @@ package than @code{h5py}.")
 science data standards.")
     (license license:bsd-3)))
 
+(define-public python-hydra-core
+  (package
+    (name "python-hydra-core")
+    (version "1.3.2")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/facebookresearch/hydra")
+             (commit (string-append "v" version))))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "1wjhwxhhy6kri27z0lvaqvs0kc6c9zdca3i0qdhvxdpcv5502glh"))
+       (modules '((guix build utils)))
+       (snippet
+        ;; Remove vendored antlr4.
+        #~(delete-file-recursively "build_helpers/bin"))))
+    (build-system pyproject-build-system)
+    (arguments
+     (list
+      #:tests? #f
+      #:phases
+      #~(modify-phases %standard-phases
+          (add-after 'unpack 'post-unpack
+            (lambda _
+              ;; Use system antlr4.
+              (substitute* "build_helpers/build_helpers.py"
+                (("\"java\",")
+                 "")
+                (("\"-jar\",")
+                 "")
+                (("join\\(.*bin/antlr.*\\),")
+                 (string-append "\""
+                                (which "antlr4") "\",")))
+              ;; Relax versioned requirements.
+              (substitute* "requirements/requirements.txt"
+                (("antlr4-python3-runtime.*")
+                 "antlr4-python3-runtime")
+                (("omegaconf.*")
+                 "omegaconf\n")))))))
+    (propagated-inputs (list java-antlr4-runtime-python python-omegaconf
+                             python-packaging))
+    (native-inputs (list antlr4 openjdk python-pytest python-setuptools))
+    (home-page "https://github.com/facebookresearch/hydra")
+    (synopsis "Framework for elegantly configuring complex applications")
+    (description
+     "Hydra is an open-source Python framework that simplifies the development
+of research and other complex applications.  The key feature is the ability to
+dynamically create a hierarchical configuration by composition and override it
+through config files and the command line.
+
+Key features:
+
+@itemize
+@item Hierarchical configuration composable from multiple sources
+@item Configuration can be specified or overridden from the command line
+@item Dynamic command line tab completion
+@item Run your application locally or launch it to run remotely
+@item Run multiple jobs with different arguments with a single command
+@end itemize")
+    (license license:expat)))
+
 (define-public python-mayavi
   (package
     (name "python-mayavi")