Support multiple lang-branch overrides in PR title#6468
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Previously, specifying a tracer branch override in the PR title (e.g. [java@my-branch]) only supported a single override at a time. This change allows multiple overrides like [java@branch1][dotnet@branch2] so that different libraries can each use their own dev branch. The get_target_branch action now outputs a JSON map of library to branch, and the compute-workflow-parameters workflow extracts the correct branch for each library before passing it to load-binary.sh. Backward compatibility with plain branch strings is preserved. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Update target branch selection docs to reflect that multiple [lang@branch] pairs can now be specified simultaneously in the PR title. Update the workflow parameter description to note JSON map support. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Motivation
The system-tests CI supports specifying a tracer branch override in the PR title like
[java@my-branch], but it only supported one branch override at a time. This made it impossible to test PRs that need changes from multiple tracer libraries simultaneously (e.g.[java@branch1][dotnet@branch2]).Changes
get_target_branchaction: Updated to capture all[lang@branch]pairs from the PR title and output them as a JSON map (e.g.{"java":"branch1","dotnet":"branch2"}). Added ahas-target-branchboolean output.compute-workflow-parameters.yml: Added a step to extract the specific library's branch from the JSON map before passing it toload-binary.sh. Also extracts theagentbranch separately for properAGENT_TARGET_BRANCHenv var support.compute_libraries_and_scenarios.yml: Exposed the newhas-target-branchoutput.ci.yml: Updated the "Fail if target branch is specified" check to use the newhas-target-branchoutput.Backward compatibility is preserved: plain branch strings from external callers still work via the legacy fallback path.
Examples
My PR [java@branch1]{"java":"branch1"}My PR [java@b1][dotnet@b2]{"java":"b1","dotnet":"b2"}My PR [java@b1][golang@b2][ruby@b3]{"java":"b1","golang":"b2","ruby":"b3"}My PR(no override)Workflow
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Reviewer checklist
tests/ormanifests/is modified ? I have the approval from R&P teambuild-XXX-imagelabel is present🤖 Generated with Claude Code