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Fix non-seekable I/O support for Arrow.Stream - #584
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When reading Arrow data from non-seekable streams (FIFOs, pipes, sockets), `Arrow.Stream`/`Arrow.Table` would fail because `Mmap.mmap()` doesn't work on these stream types. Changes: - Modified `tobytes(io::IOStream)` to detect non-seekable streams and fall back to `Base.read(io)` instead of `Mmap.mmap(io)` - Modified `Base.write(io::IO, msg::Message, ...)` to handle non-seekable outputs by wrapping `position(io)` in try-catch and skipping block tracking for non-seekable streams (only needed for file format footer) This enables Arrow data to be read from process pipes, FIFOs, and other non-seekable I/O sources. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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Summary
Arrow.Streamnot working with non-seekable I/O e.g. FIFOs and sockets #580 - Arrow.Stream fails when reading from non-seekable I/O (FIFOs, pipes, sockets)tobytes(io::IOStream)to detect non-seekable streams and fall back toBase.read()instead ofMmap.mmap()Base.write(io::IO, msg::Message, ...)to handle non-seekable outputs by skipping block position tracking (only needed for file format footer)Test plan
open(\cat file.arrow`) do io; Arrow.Table(io); end`🤖 Generated with Claude Code