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2021-02-06libcmd/markdown: handle allocation errors in lowdown_term_rndrsternenseemann
We upgrade to lowdown 0.8.0 [1] which contains a fix/improvement to a behavior mentioned in this issue thread [2] where a big part of lowdown's API would just call exit(1) on allocation errors since that is a satisfying behavior for the lowdown binary. Now lowdown_term_rndr returns 0 if an allocation error occurred which we check for in libcmd/markdown.cc. Also the extern "C" { } wrapper around lowdown.h has been removed as it is not necessary. [1]: https://github.com/kristapsdz/lowdown/blob/6ca7c855a063d1c77ae0b89405047cc3913a74d8/versions.xml#L987-L1006 [2]: https://github.com/kristapsdz/lowdown/issues/45#issuecomment-756681153
2021-01-26Move command plugin interface to libnixcmdShea Levy