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Constrain local dependency names and build output paths - #29648
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Superseded by #29639. The implementation and regression coverage are included in that combined PR. Review the changes there.
Local dependency names could contain paths and cause build output to replace files outside the build directory. Existing symlinks in the build tree could also redirect output.
Validate primary and dependency names before constructing artifact paths, and require local bytecode to declare the requested program identity. Preserve valid Aleo program names and existing Leo library names. Reject symlinks and nonregular entries in an existing build tree before writing artifacts.
Addresses VERIA-44. This checks existing filesystem entries; it does not provide isolation against concurrent filesystem changes.
Original finding: https://veria.dev/dashboard/findings/Kryvats8XWjkLg0og7SHM