| commit 569fe4da2530d7b1356265d7cc62ca74f93ec7e5 |
| Author: Yun Peng <pcloudy@google.com> |
| Date: Thu Jan 5 16:37:29 2023 +0800 |
| |
| Add targets to make it easier to vendor the `@maven` repository |
| |
| This change is required to support Bazel's offline bootstrap build. |
| More context in https://github.com/bazelbuild/bazel/pull/17112 |
| |
| Instead of checking in jar files in Bazel's source tree, Bazel wants to use rules_jvm_external |
| to fetch jars dependencies. However, to support Bazel's bootstrap build, |
| we need to patch rules_jvm_external for vendoring the @maven repository. |
| |
| - Generate a BUILD.vendor file to be used in the vendored `@maven` repository. |
| Added a jvm_import and a filegroup rule for each downloaded jar artifact. |
| The filegroup rule is required by the bootstrap Java toolchain used in Bazel's |
| bootstrap build. The bootstrap Java toolchain cannot depend on a jvm_import target. |
| Because the jvm_import rule depends on a java_binary tool "AddJarManifestEntry", |
| which requires a Java toolchain. Depending on the jar via a filegroup rule helps |
| avoid this cyclic dependency. |
| - Added a filegroup rule to collect all sources needed for vendoring `@maven`, |
| including BUILD.vendor, WORKSPACE and jar files. |
| |
| diff --git a/coursier.bzl b/coursier.bzl |
| index 901a6b0..d763f01 100644 |
| --- a/coursier.bzl |
| +++ b/coursier.bzl |
| @@ -47,6 +47,12 @@ bzl_library( |
| ) |
| """ |
| |
| +_BUILD_VENDOR = """ |
| +load("@rules_jvm_external//private/rules:jvm_import.bzl", "jvm_import") |
| + |
| +{vendor_targets} |
| +""" |
| + |
| DEFAULT_AAR_IMPORT_LABEL = "@build_bazel_rules_android//android:rules.bzl" |
| |
| _AAR_IMPORT_STATEMENT = """\ |
| @@ -577,7 +583,7 @@ def _pinned_coursier_fetch_impl(repository_ctx): |
| ) |
| |
| repository_ctx.report_progress("Generating BUILD targets..") |
| - (generated_imports, jar_versionless_target_labels) = parser.generate_imports( |
| + (generated_imports, jar_versionless_target_labels, generated_vendor_targets) = parser.generate_imports( |
| repository_ctx = repository_ctx, |
| dep_tree = dep_tree, |
| explicit_artifacts = { |
| @@ -616,6 +622,14 @@ def _pinned_coursier_fetch_impl(repository_ctx): |
| executable = False, |
| ) |
| |
| + repository_ctx.file( |
| + "BUILD.vendor", |
| + (_BUILD_VENDOR).format( |
| + vendor_targets = generated_vendor_targets, |
| + ), |
| + executable = False, |
| + ) |
| + |
| _add_outdated_files(repository_ctx, artifacts, repositories) |
| |
| # Generate a compatibility layer of external repositories for all jar artifacts. |
| @@ -1135,7 +1149,7 @@ def _coursier_fetch_impl(repository_ctx): |
| }) |
| |
| repository_ctx.report_progress("Generating BUILD targets..") |
| - (generated_imports, jar_versionless_target_labels) = parser.generate_imports( |
| + (generated_imports, jar_versionless_target_labels, _) = parser.generate_imports( |
| repository_ctx = repository_ctx, |
| dep_tree = dep_tree, |
| explicit_artifacts = { |
| diff --git a/private/dependency_tree_parser.bzl b/private/dependency_tree_parser.bzl |
| index 8515bf5..7653dea 100644 |
| --- a/private/dependency_tree_parser.bzl |
| +++ b/private/dependency_tree_parser.bzl |
| @@ -107,6 +107,9 @@ def _generate_imports(repository_ctx, dep_tree, explicit_artifacts, neverlink_ar |
| for jetify_include_artifact in repository_ctx.attr.jetify_include_list: |
| jetify_include_dict[jetify_include_artifact] = None |
| |
| + artifact_paths = [] |
| + vendor_targets = [] |
| + |
| # Iterate through the list of artifacts, and generate the target declaration strings. |
| for artifact in dep_tree["dependencies"]: |
| artifact_path = artifact["file"] |
| @@ -336,6 +339,7 @@ def _generate_imports(repository_ctx, dep_tree, explicit_artifacts, neverlink_ar |
| target_import_string.append(")") |
| |
| all_imports.append("\n".join(target_import_string)) |
| + vendor_targets.append("\n".join(target_import_string)) |
| |
| # 10. Create a versionless alias target |
| # |
| @@ -346,6 +350,9 @@ def _generate_imports(repository_ctx, dep_tree, explicit_artifacts, neverlink_ar |
| versioned_target_alias_label = escape(strip_packaging_and_classifier(artifact["coord"])) |
| all_imports.append("alias(\n\tname = \"%s\",\n\tactual = \"%s\",\n%s)" % |
| (versioned_target_alias_label, target_label, alias_visibility)) |
| + file_group_target_string = "filegroup(\n\tname = \"%s\",\n\tsrcs = [\"%s\"],\n%s)" % (target_label + "_file", artifact_path, alias_visibility) |
| + all_imports.append(file_group_target_string) |
| + vendor_targets.append(file_group_target_string) |
| |
| # 11. If using maven_install.json, use a genrule to copy the file from the http_file |
| # repository into this repository. |
| @@ -359,6 +366,9 @@ def _generate_imports(repository_ctx, dep_tree, explicit_artifacts, neverlink_ar |
| if repository_ctx.attr.maven_install_json: |
| all_imports.append(_genrule_copy_artifact_from_http_file(artifact, default_visibilities)) |
| |
| + # 12. collect the artifact_path for the filegroup rule collecting all necessary sources for vendoring |
| + artifact_paths.append("\"%s\"" % artifact_path) |
| + |
| else: # artifact_path == None: |
| # Special case for certain artifacts that only come with a POM file. |
| # Such artifacts "aggregate" their dependencies, so they don't have |
| @@ -410,7 +420,10 @@ def _generate_imports(repository_ctx, dep_tree, explicit_artifacts, neverlink_ar |
| all_imports.append("alias(\n\tname = \"%s\",\n\tactual = \"%s\",\n%s)" % |
| (versioned_target_alias_label, target_label, alias_visibility)) |
| |
| - return ("\n".join(all_imports), jar_versionless_target_labels) |
| + all_imports.append("filegroup(\n\tname = \"srcs\",\n\tsrcs = [\n\t\t%s,\n\t],\n\tvisibility = [\"//visibility:public\"],\n)" % |
| + (",\n\t\t".join(["\"BUILD.vendor\"", "\"defs.bzl\"", "\"WORKSPACE\""] + artifact_paths))) |
| + |
| + return ("\n".join(all_imports), jar_versionless_target_labels, "\n".join(vendor_targets)) |
| |
| parser = struct( |
| generate_imports = _generate_imports, |
