pocolog --extract, --compress, --to-new-format have been missing functionality since removal of file.rb in 2019

[pierrewillenbrockdfki]

The each_block implementation was removed with file.rb, which is used by --extract, --compress, --to-new-format. The alternative seems to be each_block_header, and then continuing reading the stream either by reading the whole rest of the payload, or using some more specific readers.

For --to-new-format, this is not possible, considering the old file will not have a prologue and the Logfiles.initialize will fail without creating a Logfiles object used by each_block_header. Here, one can fall back to BlockStream and its read_next_block_header.

An implementation of this can be found in https://github.com/pierrewillenbrockdfki/tools-pocolog/pull/new/cli-each_block-fixes

You can use that as a basis for your own fixes, or i can create a merge request if this is fine as-is.