build: drop @cgrindel_bazel_starlib//updatesrc

Refactor the remaining targets that depended on @cgrindel_bazel_starlib//updatesrc.
The repository has now been completely migrated to @aspect_bazel_lib//lib:write_source_files.

During the refactor, we dropped the functionality to write the source files in
rules_openapi. Instead, the caller side can decide how to write the source
files. This makes the rules more composable and easier to use. The functionality
has been moved to a macro in private/mgmtapi/api.bzl, which is used inside of
scionproto/scion.

BUILD.bazel

@@ -7,7 +7,6 @@ load("//tools/lint:write_source_files.bzl", "write_source_files")
 load("//tools/lint/python:flake8_config.bzl", "flake8_lint_config")
 load("//:nogo.bzl", "nogo_deps")
 load("@com_github_bazelbuild_buildtools//buildifier:def.bzl", "buildifier")
-load("@cgrindel_bazel_starlib//updatesrc:defs.bzl", "updatesrc_update_all")
 
 # gazelle:prefix github.com/scionproto/scion
 # gazelle:map_kind go_library go_library //tools/lint:go.bzl
@@ -233,19 +232,22 @@ buildifier(
     mode = "check",
 )
 
-# Runs all update_src targets in this Workspace. Currently, generating the
-# OpenAPI specs is the last target that depends on update_src. Eventually,
-# this should be transitioned to write_all_source_files below.
-updatesrc_update_all(
-    name = "update_all",
-)
-
 # Runs all write_source_files targets in this Workspace. To update the list run
 # bazel run @com_github_bazelbuild_buildtools//buildozer -- --root_dir $PWD  "add additional_update_targets $( bazel query 'filter("^.*[^\d]$", kind(_write_source_file, //...)) except //:write_all_source_files' | tr '\n' ' ')" //:write_all_source_files
 write_source_files(
     name = "write_all_source_files",
     additional_update_targets = [
+        "//control/mgmtapi:write_files",
+        "//daemon/mgmtapi:write_files",
+        "//dispatcher/mgmtapi:write_files",
         "//doc/_build/_static/command:write_files",
         "//doc/command:write_files",
+        "//gateway/mgmtapi:write_files",
+        "//private/ca/api:write_files",
+        "//private/mgmtapi/cppki/api:write_files",
+        "//private/mgmtapi/health/api:write_files",
+        "//private/mgmtapi/segments/api:write_files",
+        "//router/mgmtapi:write_files",
+        "//spec:write_files",
     ],
 )

WORKSPACE

@@ -297,9 +297,3 @@ rules_openapi_dependencies()
 load("//rules_openapi:install.bzl", "rules_openapi_install_yarn_dependencies")
 
 rules_openapi_install_yarn_dependencies()
-
-# TODO(lukedirtwalker): can that be integrated in the rules_openapi_dependencies
-# call above somehow?
-load("@cgrindel_bazel_starlib//:deps.bzl", "bazel_starlib_dependencies")
-
-bazel_starlib_dependencies()

control/mgmtapi/BUILD.bazel

@@ -1,5 +1,6 @@
 load("//tools/lint:go.bzl", "go_library", "go_test")
-load("@com_github_scionproto_scion//rules_openapi:defs.bzl", "openapi_build_docs", "openapi_generate_go")
+load("@com_github_scionproto_scion//rules_openapi:defs.bzl", "openapi_build_docs")
+load("//private/mgmtapi:api.bzl", "openapi_generate_go")
 
 openapi_build_docs(
     name = "doc",

daemon/mgmtapi/BUILD.bazel

@@ -1,5 +1,6 @@
 load("//tools/lint:go.bzl", "go_library")
-load("@com_github_scionproto_scion//rules_openapi:defs.bzl", "openapi_build_docs", "openapi_generate_go")
+load("@com_github_scionproto_scion//rules_openapi:defs.bzl", "openapi_build_docs")
+load("//private/mgmtapi:api.bzl", "openapi_generate_go")
 
 openapi_build_docs(
     name = "doc",

dispatcher/mgmtapi/BUILD.bazel

@@ -1,5 +1,6 @@
 load("//tools/lint:go.bzl", "go_library")
-load("//rules_openapi:defs.bzl", "openapi_build_docs", "openapi_generate_go")
+load("//rules_openapi:defs.bzl", "openapi_build_docs")
+load("//private/mgmtapi:api.bzl", "openapi_generate_go")
 
 openapi_build_docs(
     name = "doc",

gateway/mgmtapi/BUILD.bazel

@@ -1,5 +1,6 @@
 load("//tools/lint:go.bzl", "go_library")
-load("@com_github_scionproto_scion//rules_openapi:defs.bzl", "openapi_build_docs", "openapi_generate_go")
+load("@com_github_scionproto_scion//rules_openapi:defs.bzl", "openapi_build_docs")
+load("//private/mgmtapi:api.bzl", "openapi_generate_go")
 
 openapi_build_docs(
     name = "doc",

private/ca/api/BUILD.bazel

@@ -1,5 +1,5 @@
 load("//tools/lint:go.bzl", "go_library")
-load("@com_github_scionproto_scion//rules_openapi:defs.bzl", "openapi_generate_go")
+load("//private/mgmtapi:api.bzl", "openapi_generate_go")
 
 openapi_generate_go(
     name = "api_generated",

private/mgmtapi/api.bzl

@@ -0,0 +1,58 @@
+"""OpenAPI Macros
+Macros for generating Go code from OpenAPI specs.
+"""
+
+load("//tools/lint:write_source_files.bzl", "write_source_files")
+load("//rules_openapi:defs.bzl", _openapi_generate_go = "openapi_generate_go")
+
+def openapi_generate_go(
+        name,
+        client = True,
+        server = True,
+        spec = True,
+        types = True,
+        **kwargs):
+    """
+    Generates Go code from an OpenAPI spec.
+
+    This macro creates two additional rules:
+    - {{name}}_files: A filegroup with the generated files.
+    - write_files: A write_source_files rule that writes the generated files to
+      the source directory.
+
+    Args:
+        name: The name of the rule.
+        client: Whether to generate a client.
+        server: Whether to generate a server.
+        spec: Whether to generate a spec.
+        types: Whether to generate types.
+        **kwargs: Ad.
+    """
+
+    _openapi_generate_go(
+        name = name + "_gen",
+        out_client = "client.bzl.gen.go" if client else None,
+        out_server = "server.bzl.gen.go" if server else None,
+        out_spec = "spec.bzl.gen.go" if spec else None,
+        out_types = "types.bzl.gen.go" if types else None,
+        **kwargs
+    )
+
+    out_files = []
+    write_files = {}
+    for typ, gen in {"client": client, "server": server, "spec": spec, "types": types}.items():
+        if not gen:
+            continue
+        src = typ + ".bzl.gen.go"
+        out_files.append(src)
+        write_files[typ + ".gen.go"] = src
+
+    native.filegroup(
+        name = name,
+        srcs = out_files,
+    )
+
+    write_source_files(
+        name = "write_files",
+        files = write_files,
+    )

private/mgmtapi/cppki/api/BUILD.bazel

@@ -1,5 +1,5 @@
 load("//tools/lint:go.bzl", "go_library", "go_test")
-load("@com_github_scionproto_scion//rules_openapi:defs.bzl", "openapi_generate_go")
+load("//private/mgmtapi:api.bzl", "openapi_generate_go")
 
 openapi_generate_go(
     name = "api_generated",

private/mgmtapi/health/api/BUILD.bazel

@@ -1,5 +1,5 @@
 load("//tools/lint:go.bzl", "go_library")
-load("@com_github_scionproto_scion//rules_openapi:defs.bzl", "openapi_generate_go")
+load("//private/mgmtapi:api.bzl", "openapi_generate_go")
 
 openapi_generate_go(
     name = "api_generated",

private/mgmtapi/segments/api/BUILD.bazel

@@ -1,5 +1,5 @@
 load("//tools/lint:go.bzl", "go_library", "go_test")
-load("@com_github_scionproto_scion//rules_openapi:defs.bzl", "openapi_generate_go")
+load("//private/mgmtapi:api.bzl", "openapi_generate_go")
 
 openapi_generate_go(
     name = "api_generated",

router/mgmtapi/BUILD.bazel

@@ -1,5 +1,6 @@
 load("//tools/lint:go.bzl", "go_library", "go_test")
-load("@com_github_scionproto_scion//rules_openapi:defs.bzl", "openapi_build_docs", "openapi_generate_go")
+load("@com_github_scionproto_scion//rules_openapi:defs.bzl", "openapi_build_docs")
+load("//private/mgmtapi:api.bzl", "openapi_generate_go")
 
 openapi_build_docs(
     name = "doc",

rules_openapi/defs.bzl

@@ -1,31 +1,29 @@
 load("//rules_openapi/internal:generate.bzl", _openapi_generate_go = "openapi_generate_go")
 load("//rules_openapi/internal:bundle.bzl", _openapi_bundle = "openapi_bundle")
 load("//rules_openapi/internal:docs.bzl", _openapi_build_docs = "openapi_build_docs")
-load("//rules_openapi/internal:header.bzl", _header = "header")
-load("@cgrindel_bazel_starlib//updatesrc:defs.bzl", "updatesrc_update")
 
 def openapi_bundle(
         name,
         srcs,
         entrypoint,
         visibility = None):
     _openapi_bundle(
-        name = name,
+        name = name + "-no-header",
+        out = name + "-no-header.bzl.gen.yml",
         srcs = srcs,
         entrypoint = entrypoint,
-        visibility = visibility,
-    )
-
-    _header_target = name + "-add-header"
-    _header(
-        name = _header_target,
-        srcs = [":" + name],
-        header = "# GENERATED FILE DO NOT EDIT",
     )
-
-    updatesrc_update(
-        name = name + "-update",
-        deps = [":" + _header_target],
+    native.genrule(
+        name = name,
+        srcs = [name + "-no-header"],
+        outs = [name + ".bzl.gen.yml"],
+        cmd = "$(location @com_github_scionproto_scion//rules_openapi/internal:header.sh)  \
+            '$(location " + name + "-no-header)' \
+            '$(location " + name + ".bzl.gen.yml)' \
+            '# GENERATED FILE DO NOT EDIT' \
+        ",
+        tools = ["@com_github_scionproto_scion//rules_openapi/internal:header.sh"],
+        visibility = visibility,
     )
 
 def openapi_generate_go(
@@ -36,24 +34,6 @@ def openapi_generate_go(
         **kwargs
     )
 
-    generate = {
-        "types": kwargs.get("types", True),
-        "server": kwargs.get("server", True),
-        "client": kwargs.get("client", True),
-        "spec": kwargs.get("spec", True),
-    }
-
-    srcs = []
-    for k, v in generate.items():
-        if not v:
-            continue
-        srcs.append(k + ".gen.go")
-    updatesrc_update(
-        name = name + "-update",
-        srcs = srcs,
-        outs = [":" + name],
-    )
-
 def openapi_build_docs(
         name,
         src,

rules_openapi/dependencies.bzl

@@ -8,15 +8,3 @@ def rules_openapi_dependencies():
         sha256 = "b32a4713b45095e9e1921a7fcb1adf584bc05959f3336e7351bcf77f015a2d7c",
         urls = ["https://github.com/bazelbuild/rules_nodejs/releases/download/4.1.0/rules_nodejs-4.1.0.tar.gz"],
     )
-
-    maybe(
-        http_archive,
-        name = "cgrindel_bazel_starlib",
-        sha256 = "163a45d949fdb96b328bb44fe56976c610c6728c77118c6cd999f26cedca97eb",
-        strip_prefix = "bazel-starlib-0.2.1",
-        urls = [
-            "http://github.com/cgrindel/bazel-starlib/archive/v0.2.1.tar.gz",
-        ],
-        patches = ["@com_github_scionproto_scion//rules_openapi:rules_starlib.patch"],
-        patch_args = ["-p1"],
-    )

rules_openapi/internal/bundle.bzl

@@ -1,8 +1,11 @@
 load("@bazel_skylib//lib:shell.bzl", "shell")
 
 def _openapi_bundle_impl(ctx):
-    prefix = ctx.label.name
-    out_file = ctx.actions.declare_file(prefix + ".gen.yml")
+    if ctx.outputs.out:
+        out_file = ctx.outputs.out
+    else:
+        out_file = ctx.actions.declare_file(ctx.label.name + ".bzl.gen.yml")
+
     cmd = "{bin} bundle --output {out} {entrypoint}".format(
         bin = ctx.executable._openapi_cli.path,
         out = shell.quote(out_file.path),
@@ -29,6 +32,10 @@ openapi_bundle = rule(
             doc = "All files that are referenced in the entrypoint file",
             allow_files = [".yml"],
         ),
+        "out": attr.output(
+            doc = "The bundled open API specification file",
+            mandatory = False,
+        ),
         "entrypoint": attr.label(
             doc = "The main source to generate files from",
             allow_single_file = [".yml"],

rules_openapi/internal/generate.bzl

@@ -2,16 +2,15 @@ load("@bazel_skylib//lib:shell.bzl", "shell")
 
 def _openapi_generate_go(ctx):
     generate = {
-        "types": ctx.attr.types,
-        "server": ctx.attr.server,
-        "client": ctx.attr.client,
-        "spec": ctx.attr.spec,
+        "types": ctx.outputs.out_types,
+        "server": ctx.outputs.out_server,
+        "client": ctx.outputs.out_client,
+        "spec": ctx.outputs.out_spec,
     }
     out_files = []
-    for k, v in generate.items():
-        if not v:
+    for k, out_file in generate.items():
+        if not out_file:
             continue
-        out_file = ctx.actions.declare_file(k + ".gen.go")
         generate_kind = k
         if generate_kind == "server":
             generate_kind = "chi-server"
@@ -69,26 +68,10 @@ openapi_generate_go = rule(
             doc = "The Go package the generated code should live in.",
             default = "api",
         ),
-        "types": attr.bool(
-            doc = "Whether the types file should be generated",
-            default = True,
-        ),
         "types_excludes": attr.label(
             doc = "The file containing the schema list to exclude during the types generation.",
             allow_single_file = True,
         ),
-        "server": attr.bool(
-            doc = "Whether the server code should be generated",
-            default = True,
-        ),
-        "client": attr.bool(
-            doc = "Whehter the client code should be generated",
-            default = True,
-        ),
-        "spec": attr.bool(
-            doc = "Whether the spec code should be generated",
-            default = True,
-        ),
         "templates": attr.label_list(
             doc = """Folder containing Go templates to be used during code generation.
                 Note that the template file names need to match the ones used by the
@@ -102,5 +85,21 @@ openapi_generate_go = rule(
             executable = True,
             cfg = "target",
         ),
+        "out_types": attr.output(
+            doc = "The generated types file.",
+            mandatory = False,
+        ),
+        "out_server": attr.output(
+            doc = "The generated server file.",
+            mandatory = False,
+        ),
+        "out_client": attr.output(
+            doc = "The generated client file.",
+            mandatory = False,
+        ),
+        "out_spec": attr.output(
+            doc = "The generated spec file.",
+            mandatory = False,
+        ),
     },
 )