Add opam support (fixes #1278)

repology-schemacheck.py

@@ -87,6 +87,7 @@
     'nix',
     'noir',
     'npackd',
+    'opam',
     'openbsd',
     'openindiana',
     'openmamba',

repology/packagemaker/names.py

@@ -240,6 +240,8 @@ class NameType:
 
     SERPENTOS_NAME: ClassVar[int] = GENERIC_SRC_NAME
 
+    OPAM_NAME: ClassVar[int] = GENERIC_SRC_NAME
+
 
 @dataclass
 class _NameMapping:

repology/parsers/parsers/opam.py

@@ -0,0 +1,31 @@
+# Copyright (C) 2024 Dmitry Marakasov <[email protected]>
+#
+# This file is part of repology
+#
+# repology is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# repology is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with repology.  If not, see <http://www.gnu.org/licenses/>.
+
+from typing import Iterable
+
+from repology.packagemaker import NameType, PackageFactory, PackageMaker
+from repology.parsers import Parser
+from repology.parsers.json import iter_json_list
+
+
+class OpamStatsJsonParser(Parser):
+    def iter_parse(self, path: str, factory: PackageFactory) -> Iterable[PackageMaker]:
+        for pkgdata in iter_json_list(path, (None,)):
+            with factory.begin() as pkg:
+                pkg.add_name(pkgdata['name'], NameType.OPAM_NAME)
+                pkg.set_version(pkgdata['versions'][-1]['version'])
+                yield pkg

repos.d/modules/opam.yaml

@@ -0,0 +1,24 @@
+###########################################################################
+# opam (OCaml)
+###########################################################################
+- name: opam
+  type: modules
+  desc: opam
+  family: opam
+  ruleset: opam
+  minpackages: 4000
+  sources:
+    - name: stats.json
+      fetcher:
+        class: FileFetcher
+        url: https://opam.ocaml.org/json/stats.json
+      parser:
+        class: OpamStatsJsonParser
+  shadow: true
+  repolinks:
+    - desc: opam - OCaml Package Manager
+      url: https://opam.ocaml.org/
+  packagelinks:
+    - type: PROJECT_HOMEPAGE
+      url: 'https://opam.ocaml.org/packages/{srcname}/'
+  groups: [all, production]