From cea98d2717c1483dded8193907e03a1c7e67ef61 Mon Sep 17 00:00:00 2001
From: Dmitry Marakasov <amdmi3@amdmi3.ru>
Date: Tue, 23 Jul 2024 18:28:13 +0300
Subject: [PATCH] Add opam support (fixes #1278)

---
 repology-schemacheck.py          |  1 +
 repology/packagemaker/names.py   |  2 ++
 repology/parsers/parsers/opam.py | 31 +++++++++++++++++++++++++++++++
 repos.d/modules/opam.yaml        | 24 ++++++++++++++++++++++++
 4 files changed, 58 insertions(+)
 create mode 100644 repology/parsers/parsers/opam.py
 create mode 100644 repos.d/modules/opam.yaml

diff --git a/repology-schemacheck.py b/repology-schemacheck.py
index 03601100a..0d84f4b4a 100755
--- a/repology-schemacheck.py
+++ b/repology-schemacheck.py
@@ -87,6 +87,7 @@
     'nix',
     'noir',
     'npackd',
+    'opam',
     'openbsd',
     'openindiana',
     'openmamba',
diff --git a/repology/packagemaker/names.py b/repology/packagemaker/names.py
index c5741f4ad..0ce4a8a6c 100644
--- a/repology/packagemaker/names.py
+++ b/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:
diff --git a/repology/parsers/parsers/opam.py b/repology/parsers/parsers/opam.py
new file mode 100644
index 000000000..82e2cc951
--- /dev/null
+++ b/repology/parsers/parsers/opam.py
@@ -0,0 +1,31 @@
+# Copyright (C) 2024 Dmitry Marakasov <amdmi3@amdmi3.ru>
+#
+# 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
diff --git a/repos.d/modules/opam.yaml b/repos.d/modules/opam.yaml
new file mode 100644
index 000000000..da7d2ec32
--- /dev/null
+++ b/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]