feat: add special lints for bioconda-repodata-patches recipe (#855)

bioconda_utils/lint/check_repodata_patches.py

@@ -0,0 +1,30 @@
+from bioconda_utils import utils
+from bioconda_utils.lint import INFO, LintCheck
+
+
+class repodata_patches_no_version_bump(LintCheck):
+    """The bioconda-repodata-patches recipe was changed but does not contain a version bump.
+
+    Please set the version to the current date in the format ``YYYYMMDD``.
+    """
+    def check_recipe(self, recipe):
+        if recipe.get("package/name") != "bioconda-repodata-patches":
+            return
+        repodata = utils.RepoData()
+        old_versions = repodata.get_versions("bioconda-repodata-patches")
+        if recipe.get('version') in old_versions:
+            self.message()
+
+
+class repodata_patches_show_diff(LintCheck):
+    """The bioconda-repodata-patches recipe was changed.
+
+    Here comes the resulting repodata-diff:
+    """
+
+    severity = INFO
+
+    def check_recipe(self, recipe):
+        if recipe.get("package/name") != "bioconda-repodata-patches":
+            return
+        # TODO run diff script and display the diff as a lint message