Bazel: ease update of local registry

.bazelrc

@@ -14,7 +14,7 @@ build:linux --cxxopt=-std=c++20
 build:macos --cxxopt=-std=c++20 --cpu=darwin_x86_64
 build:windows --cxxopt=/std:c++20 --cxxopt=/Zc:preprocessor
 
-common --registry=file://%workspace%/misc/bazel/override_registry
+common --registry=file://%workspace%/misc/bazel/registry
 common --registry=https://bcr.bazel.build
 
 import %workspace%/.bazelrc.exported

misc/bazel/override_registry/README.md

@@ -1,8 +0,0 @@
-This was taken from https://github.com/bazelbuild/bazel-central-repository and readapted:
-* The latest version was renamed with a `-patched` suffix
-* The above rename was done also in the files:
-   * `modules/rules_kotlin/metadata.json`
-   * `module/rules_kotlin/1.9.4-patched/MODULE.bazel`
-* `modules/rules_kotlin/1.9.4-patched/patches/add_language_version_option.patch` was added
-* the above patch was added in `modules/rules_kotlin/1.9.4-patched/source.json`, with integrity SHAs generated via
-  `echo -n sha256-; cat <file> | openssl dgst -sha256 -binary | base64`.

misc/bazel/override_registry/modules/rules_kotlin/metadata.json

@@ -1,11 +0,0 @@
-{
-    "homepage": "https://github.com/bazelbuild/rules_kotlin",
-    "maintainers": [],
-    "repository": [
-        "github:bazelbuild/rules_kotlin"
-    ],
-    "versions": [
-        "1.9.4-patched"
-    ],
-    "yanked_versions": {}
-}

misc/bazel/registry/README.md

@@ -0,0 +1,3 @@
+Versions to be patched can be taken from https://github.com/bazelbuild/bazel-central-repository. After adding patches
+inside `<repo>/<version>/patches`, and eventually renaming `<version>`, run [`fix.py`](./fix.py) to align all metadata
+to the renamed version and added patches.

misc/bazel/registry/fix.py

@@ -0,0 +1,53 @@
+#!/usr/bin/env python3
+
+"""
+Fix metadata in overridden registry, updating `metadata.json` to list correct versions and `source.json`
+to list correct patches with sha256 hashes.
+"""
+
+import pathlib
+import json
+import base64
+import hashlib
+import re
+
+this_dir = pathlib.Path(__file__).resolve().parent
+
+
+def sha256(file):
+    with open(file, 'rb') as input:
+        hash = hashlib.sha256(input.read()).digest()
+    hash = base64.b64encode(hash).decode()
+    return f"sha256-{hash}"
+
+
+def patch_file(file, f):
+    try:
+        data = file.read_text()
+    except FileNotFoundError:
+        data = None
+    file.write_text(f(data))
+
+
+def patch_json(file, **kwargs):
+    def update(data):
+        data = json.loads(data) if data else {}
+        data.update(kwargs)
+        return json.dumps(data, indent=4) + "\n"
+
+    patch_file(file, update)
+
+
+for entry in this_dir.joinpath("modules").iterdir():
+    if not entry.is_dir():
+        continue
+    versions = [e for e in entry.iterdir() if e.is_dir()]
+
+    patch_json(entry / "metadata.json", versions=[v.name for v in versions])
+
+    for version in versions:
+        patch_json(version / "source.json", patches={
+            p.name: sha256(p) for p in version.joinpath("patches").iterdir()
+        })
+        patch_file(version / "MODULE.bazel",
+                   lambda s: re.sub(r'''version\s*=\s*['"].*['"]''', f'version = "{version.name}"', s, 1))

misc/bazel/registry/modules/rules_kotlin/1.9.4-patched/patches/module_dot_bazel_version.patch

@@ -5,7 +5,7 @@
  module(
      name = "rules_kotlin",
 -    version = "1.9.0",
-+    version = "1.9.4",
++    version = "1.9.4-patched",
      repo_name = "rules_kotlin",
  )
  

misc/bazel/registry/modules/rules_kotlin/1.9.4-patched/source.json

@@ -2,8 +2,8 @@
     "integrity": "sha256-dsD8wsI+33NjIK3tGs2d3guuQY5XMd8Skz2IbLqGt5U=",
     "url": "https://github.com/bazelbuild/rules_kotlin/releases/download/v1.9.4/rules_kotlin-v1.9.4.tar.gz",
     "patches": {
-        "module_dot_bazel_version.patch": "sha256-8Fu6NiXzckWm8oaVY/rPonGEqWG5ijV0r2GUf7ajKHM=",
-        "add_language_version_option.patch": "sha256-uF6LFpkqe9ye7+avviY1NE5ZhxJ3WMLenS+mbg4XFTM="
+        "module_dot_bazel_version.patch": "sha256-0GnFHOv9wuuv3jFcHBSXrdo7JMFP7y66O5C4rccy5wg=",
+        "codeql_add_language_version_option.patch": "sha256-uF6LFpkqe9ye7+avviY1NE5ZhxJ3WMLenS+mbg4XFTM="
     },
     "patch_strip": 1
 }

misc/bazel/registry/modules/rules_kotlin/metadata.json

@@ -0,0 +1,5 @@
+{
+    "versions": [
+        "1.9.4-patched"
+    ]
+}