rust_stdlib_filegroup: update to support srcs from another package #2735
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The
rust_stdlib_filegrouprule would sometimes break when passing.rlib-s originating from another package tosrcs.The root cause is the logic inside it that creates
.a->.rlibsymlinks, where the.asymlink is declared sibling of the.rlib. Bazel only allows symlink siblings to be in the same package as the rule.This updates the logic to detect this and create an intermediary
.rlibunder the rule's package, allowing the.ato be symlinked to that.