Add per-target bazel run arg/env delegation for itest_* targets

[darkrift]

This is useful when using bazel run to locally launch stacks that require custom/personalized arguments and env vars.

Summary

• add delegated per-target runtime args for executable itest_* targets via --target_arg
• add delegated per-target runtime env injection via --target_env
• support Bazel aliases when resolving delegated target labels in the itest dependency graph
• make svc startup and command healthcheck logs quote arguments to avoid ambiguity
• add tests, docs, and an example covering the new behavior

Details

• extend svcinit to parse bazel run CLI sections and append delegated args to the matching target’s configured args
• inject delegated KEY=VALUE env vars into the matching executable target before launch
• preserve alias labels from the macro layer into the generated service graph so runtime resolution can accept aliases
• reject non-executable group targets when used with delegated arg/env flags
• update the example to demonstrate:
  • one --target_arg carrying multiple arguments for a target
  • --target_env for per-target env injection
  • filtered TARGET_ARGS_ env output for readability

Testing

• bazel test //cmd/svcinit:svcinit_test //cmd/svcinit/target_args:target_args_test
• cd examples && bazel build //target_args:workflow

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Preserve configurable service labels

When deps or services is supplied as a configurable select(...), this new helper tries to iterate that selector during macro expansion before forwarding it to the underlying attr.label_list. Those attrs were previously passed through unchanged, so existing users with platform/config-specific service graphs now fail to load even if they are not using target-argument delegation. Consider preserving select values or making the new internal metadata configurable as well.

Useful? React with 👍 / 👎.

[chatgpt-codex-connector]

Don't document unsupported multi-env syntax

The documented command shows two KEY=VALUE entries after one --target_env, but the parser only consumes the single token at i+2; the second assignment is then treated as a positional argument for the previous --target_arg section. Users following this example will silently pass OTHER_ENV=... as an arg instead of setting it on service_alias, so split the example into separate --target_env invocations or update the parser to consume multiple assignments.

Useful? React with 👍 / 👎.