Support macOS with M1 processor

[Vertexwahn]

git clone https://github.com/google/copybara.git
bazel build //java/com/google/copybara

resutls on my macBook (with M1 processor) in:

/private/var/tmp/_bazel_me/7e0c0b9f3cabec19d47f3e37da2ab9de/external/io_bazel/third_party/BUILD:376:20: Extracting interface @io_bazel//third_party:error_prone_annotations_checked_in failed: (Exit 1): ijar failed: error executing command external/remote_java_tools_darwin/java_tools/ijar/ijar external/io_bazel/third_party/error_prone/error_prone_annotations-2.11.0.jar ... (remaining 3 arguments skipped)

Use --sandbox_debug to see verbose messages from the sandbox and retain the sandbox build root for debugging
src/main/tools/process-wrapper-legacy.cc:80: "execvp(external/remote_java_tools_darwin/java_tools/ijar/ijar, ...)": Bad CPU type in executable
Target //java/com/google/copybara:copybara failed to build
Use --verbose_failures to see the command lines of failed build steps.

So far copybara worked for me on Ubuntu 22.04 (with x64)

Used Bazel version: 5.3.2

Or it this an Bazel issue? bazelbuild/bazel#13944

Is there a workaround?

I currently embed copybara this way in my WORKSPACE file:

#-------------------------------------------------------------------------------------
# Copybara
#-------------------------------------------------------------------------------------

# Use local repository
local_repository(
    name = "com_github_google_copybara",
    path = "third_party/copybara-85f7be9c1761b88e4834bb08e2d6e11faa05b51b",
)

load("@com_github_google_copybara//:repositories.bzl", "copybara_repositories")

copybara_repositories()

load("@com_github_google_copybara//:repositories.maven.bzl", "copybara_maven_repositories")

copybara_maven_repositories()

load("@com_github_google_copybara//:repositories.go.bzl", "copybara_go_repositories")

copybara_go_repositories()

[hsudhof]

Updating bazel should resolve this.

[Vertexwahn]

@Vertexwahn I tried also 6.0.0-pre.20221020.1 with the same error... Currently I have Rosetta 2 installed as a workaround...

[mikelalcon]

Are you running the arm version of Bazel? I have the 5.3.2 ARM working for me in an M1 here.

[Vertexwahn]

@mikelalcon I used Bazel on macOS with M1 before I installed Rosetta 2 (via brew install bazel - I am assuming I have ARM compiled version of Bazel)

[mikelalcon]

From what I see from your log, the failure is for:

external/remote_java_tools_darwin/java_tools/ijar/ijar

That is a tool that Bazel ships with it, not Copybara related. So definitely ijar seems to be x64 instead of ARM. Another posibility is that it is in the cached downloads of Bazel. Maybe bazel clean fixes the issue.

[Vertexwahn]

I now have Rosetta 2 installed and need it from time to time for other applications (so I cannot uninstall it) - unfortunately, I have no idea how to check if it would work now without Rosetta 2 - therefore I close this issue since Copybara works now for me on M1