bzlmod: support git repos in source.json

site/en/external/registry.md

@@ -72,6 +72,17 @@ An index registry must follow the format below:
                 By default, the archive type is determined from the file extension of the URL. If the file has
                 no extension, you can explicitly specify one of the following: `"zip"`, `"jar"`, `"war"`, `"aar"`,
                 `"tar"`, `"tar.gz"`, `"tgz"`, `"tar.xz"`, `"txz"`, `"tar.zst"`, `"tzst"`, `tar.bz2`, `"ar"`, or `"deb"`.
+        *   The type can be changed to use a git repository, with these fields:
+            *   `type`: `git_repository`
+            *   The following fields as described at https://bazel.build/rules/lib/repo/git:
+                * `remote`
+                * `commit`
+                * `shallow_since`
+                * `tag`
+                * `init_submodules`
+                * `recursive_init_submodules`
+                * `verbose`
+                * `strip_prefix`
         *   The type can be changed to use a local path, representing a
             `local_repository` repo, with these fields:
             *   `type`: `local_path`

src/main/java/com/google/devtools/build/lib/bazel/bzlmod/BUILD

@@ -18,6 +18,7 @@ java_library(
     srcs = [
         "ArchiveRepoSpecBuilder.java",
         "AttributeValues.java",
+        "GitRepoSpecBuilder.java",
         "ModuleFile.java",
         "ModuleKey.java",
         "RepoSpec.java",

src/main/java/com/google/devtools/build/lib/bazel/bzlmod/GitRepoSpecBuilder.java

@@ -0,0 +1,149 @@
+// Copyright 2021 The Bazel Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+package com.google.devtools.build.lib.bazel.bzlmod;
+
+import com.google.common.base.Strings;
+import com.google.common.collect.ImmutableMap;
+import com.google.errorprone.annotations.CanIgnoreReturnValue;
+import net.starlark.java.eval.StarlarkInt;
+import java.util.List;
+
+/**
+ * Builder for a {@link RepoSpec} object that indicates how to materialize a repo corresponding to
+ * a {@code git_repository} repo rule call.
+ */
+public class GitRepoSpecBuilder {
+
+  public static final String GIT_REPO_PATH = "@bazel_tools//tools/build_defs/repo:git.bzl";
+
+  private final ImmutableMap.Builder<String, Object> attrBuilder;
+
+  public GitRepoSpecBuilder() {
+    attrBuilder = new ImmutableMap.Builder<>();
+  }
+
+  @CanIgnoreReturnValue
+  public GitRepoSpecBuilder setRepoName(String repoName) {
+    return setAttr("name", repoName);
+  }
+
+  @CanIgnoreReturnValue
+  public GitRepoSpecBuilder setRemote(String remoteRepoUrl) {
+    return setAttr("remote", remoteRepoUrl);
+  }
+
+  @CanIgnoreReturnValue
+  public GitRepoSpecBuilder setCommit(String gitCommitHash) {
+    return setAttr("commit", gitCommitHash);
+  }
+
+  @CanIgnoreReturnValue
+  public GitRepoSpecBuilder setShallowSince(String shallowSince) {
+    return setAttr("shallow_since", shallowSince);
+  }
+
+  @CanIgnoreReturnValue
+  public GitRepoSpecBuilder setTag(String tag) {
+    return setAttr("tag", tag);
+  }
+
+  @CanIgnoreReturnValue
+  public GitRepoSpecBuilder setBranch(String branch) {
+    return setAttr("branch", branch);
+  }
+
+  @CanIgnoreReturnValue
+  public GitRepoSpecBuilder setInitSubmodules(boolean initSubmodules) {
+    return setAttr("init_submodules", initSubmodules);
+  }
+
+  @CanIgnoreReturnValue
+  public GitRepoSpecBuilder setRecursiveInitSubmodules(boolean recursiveInitSubmodules) {
+    return setAttr("recursive_init_submodules", recursiveInitSubmodules);
+  }
+
+  @CanIgnoreReturnValue
+  public GitRepoSpecBuilder setVerbose(boolean verbose) {
+    return setAttr("verbose", verbose);
+  }
+
+  @CanIgnoreReturnValue
+  public GitRepoSpecBuilder setStripPrefix(String stripPrefix) {
+    return setAttr("strip_prefix", stripPrefix);
+  }
+
+  @CanIgnoreReturnValue
+  public GitRepoSpecBuilder setPatches(List<String> patches) {
+    return setAttr("patches", patches);
+  }
+
+  @CanIgnoreReturnValue
+  public GitRepoSpecBuilder setPatchTool(String patchTool) {
+    return setAttr("patch_tool", patchTool);
+  }
+
+  @CanIgnoreReturnValue
+  public GitRepoSpecBuilder setPatchArgs(List<String> patchArgs) {
+    return setAttr("patch_args", patchArgs);
+  }
+
+  @CanIgnoreReturnValue
+  public GitRepoSpecBuilder setPatchCmds(List<String> patchCmds) {
+    return setAttr("patch_cmds", patchCmds);
+  }
+
+  @CanIgnoreReturnValue
+  public GitRepoSpecBuilder setPatchCmdsWin(List<String> patchCmdsWin) {
+    return setAttr("patch_cmds_win", patchCmdsWin);
+  }
+
+  @CanIgnoreReturnValue
+  public GitRepoSpecBuilder setBuildFile(String buildFile) {
+    return setAttr("build_file", buildFile);
+  }
+
+  @CanIgnoreReturnValue
+  public GitRepoSpecBuilder setBuildFileContent(String buildFileContent) {
+    return setAttr("build_file_content", buildFileContent);
+  }
+
+  public RepoSpec build() {
+    return RepoSpec.builder()
+        .setBzlFile(GIT_REPO_PATH)
+        .setRuleClassName("git_repository")
+        .setAttributes(AttributeValues.create(attrBuilder.buildOrThrow()))
+        .build();
+  }
+
+  private GitRepoSpecBuilder setAttr(String name, String value) {
+    if (value != null && !value.isEmpty()) {
+      attrBuilder.put(name, value);
+    }
+    return this;
+  }
+
+  private GitRepoSpecBuilder setAttr(String name, boolean value) {
+    attrBuilder.put(name, value);
+    return this;
+  }
+
+  private GitRepoSpecBuilder setAttr(String name, List<String> value) {
+    if (value != null && !value.isEmpty()) {
+      attrBuilder.put(name, value);
+    }
+    return this;
+  }
+}