Validate JSON files.

.github/workflows/validate.yml

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+name: Validate
+
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: Validate
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install jsonschema
+        run: pip install jsonschema==4.6.1
+
+      - name: Validate JSON files
+        run: python schemas/validate.py

schemas/generic-ea-schema.json

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+{
+    "$schema": "https://json-schema.org/draft/2019-09/schema",
+    "$id": "https://github.com/graalvm/oracle-graalvm-ea-builds/blob/main/schemas/generic-ea-schema.json",
+    "title": "Generic Schema for Oracle GraalVM Early Access Builds",
+    "type": "array",
+    "items": {
+        "title": "List of EA builds",
+        "type": "object",
+        "required": [
+            "version",
+            "latest",
+            "download_base_url",
+            "files"
+        ],
+        "additionalProperties": false,
+        "properties": {
+            "version": {
+                "title": "The version of an EA build",
+                "type": "string"
+            },
+            "latest": {
+                "title": "Whether this is the latest EA build for this release train",
+                "type": "boolean"
+            },
+            "download_base_url": {
+                "title": "The base URL for downloading an EA build",
+                "type": "string"
+            },
+            "files": {
+                "title": "The files of an EA build",
+                "type": "array",
+                "items": {
+                    "title": "A file of an EA build",
+                    "type": "object",
+                    "required": [
+                        "filename",
+                        "arch",
+                        "platform"
+                    ],
+                    "additionalProperties": false,
+                    "properties": {
+                        "filename": {
+                            "title": "The name of an EA build file",
+                            "type": "string"
+                        },
+                        "arch": {
+                            "enum": ["aarch64", "x64"],
+                            "title": "The architecture of an EA build file",
+                            "type": "string"
+                        },
+                        "platform": {
+                            "enum": ["darwin", "linux", "windows"],
+                            "title": "The platform of an EA build file",
+                            "type": "string"
+                        }
+                    }
+                }
+            }
+        }
+    }
+}

schemas/latest-ea-schema.json

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+{
+    "$schema": "https://json-schema.org/draft/2019-09/schema",
+    "$id": "https://github.com/graalvm/oracle-graalvm-ea-builds/blob/main/schemas/latest-ea-schema.json",
+    "title": "Schema for Latest Oracle GraalVM Early Access Build",
+    "type": "object",
+    "required": [
+        "version",
+        "download_base_url",
+        "files"
+    ],
+    "additionalProperties": false,
+    "properties": {
+        "version": {
+            "title": "The version of the latest EA build",
+            "type": "string"
+        },
+        "download_base_url": {
+            "title": "The base URL for downloading the latest EA build",
+            "type": "string"
+        },
+        "files": {
+            "title": "The files of the latest EA build",
+            "type": "array",
+            "items": {
+                "title": "A file of the latest EA build",
+                "type": "object",
+                "required": [
+                    "filename",
+                    "arch",
+                    "platform"
+                ],
+                "additionalProperties": false,
+                "properties": {
+                    "filename": {
+                        "title": "The name of a file of the latest EA build",
+                        "type": "string"
+                    },
+                    "arch": {
+                        "enum": ["aarch64", "x64"],
+                        "title": "The architecture of a file of the latest EA build",
+                        "type": "string"
+                    },
+                    "platform": {
+                        "enum": ["darwin", "linux", "windows"],
+                        "title": "The platform of a file of the latest EA build",
+                        "type": "string"
+                    }
+                }
+            }
+        }
+    }
+}

schemas/validate.py

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+from jsonschema import validate as json_validate
+import json
+import os
+import urllib.request
+
+
+GENERIC_EA_SCHEMA = 'generic-ea-schema.json'
+LATEST_EA_JSON = 'latest-ea.json'
+LATEST_EA_SCHEMA = 'latest-ea-schema.json'
+ROOT_PATH = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
+SCHEMAS_DIR = 'schemas'
+VERSIONS_DIR = 'versions'
+
+
+def validate(json_name, schema_name):
+    print(f'Validating {json_name}...')
+    with open(os.path.join(ROOT_PATH, VERSIONS_DIR, json_name)) as f:
+        json_contents = json.load(f)
+    with open(os.path.join(ROOT_PATH, SCHEMAS_DIR, schema_name)) as f:
+        schema_contents = json.load(f)
+    json_validate(json_contents, schema_contents)
+    print(f'  {json_name} validates against {schema_name}')
+    if schema_name == LATEST_EA_SCHEMA:
+        builds = [json_contents]
+    else:
+        builds = json_contents
+        ensure_one_latest_build(json_name, builds)
+    validate_builds(builds)
+
+
+def ensure_one_latest_build(json_name, builds):
+    num_latest = sum([1 if build['latest'] else 0 for build in builds])
+    assert num_latest == 1, f'Expected one latest build in {json_name}, got {num_latest}'
+
+
+def validate_builds(builds):
+    for build in builds:
+        version = build['version']
+        download_base_url = build['download_base_url']
+        files = build['files']
+        assert version in download_base_url, f'version not found in download_base_url: {json.dumps(build)}'
+        assert all(version in file['filename'] for file in files), f'version not found in all filenames: {json.dumps(build)}'
+        is_pull_request = 'GITHUB_BASE_REF' in os.environ
+        if not is_pull_request:
+            check_urls_exist(download_base_url, files)
+
+
+def check_urls_exist(download_base_url, files):
+    for file in files:
+        download_url = f'{download_base_url}{file["filename"]}'
+        print(f"  Checking '{download_url}'...")
+        request = urllib.request.Request(download_url, method='HEAD')
+        response = urllib.request.urlopen(request)
+        assert response.status == 200, f"Expected status code of 200, got {response.status} for '{download_url}'"
+
+
+if __name__ == '__main__':
+    for file_name in os.listdir('versions'):
+        assert file_name.endswith('.json'), f"Unexpected non-JSON file '{file_name}'"
+        schema_name = LATEST_EA_SCHEMA if file_name == LATEST_EA_JSON else GENERIC_EA_SCHEMA
+        validate(file_name, schema_name)
+    print('JSON validation successful')