467c530e65
The "command" encoder was mostly intended for use in `%rename` - most uses can be achieved using the "regex" encoder, so we recommend using that instead. The "command" encoder suffers from a number of issues - as the documentation for it admitted, "[it] is extremely slow compared to all the other [encoders] as it involves spawning a separate process and using it for many declarations is not recommended" and that it "should generally be avoided because of performance considerations". But it's also not portable. The design assumes that `/bin/sh` supports `<<<` but that's a bash-specific feature so it doesn't work on platforms where `/bin/sh` is not bash - it fails on Debian, Ubuntu and probably some other Linux distros, plus most non-Linux platforms. Microsoft Windows doesn't even have a /bin/sh as standard. Finally, no escaping of the passed string is done, so it has potential security issues (though at least with %rename the input is limited to valid C/C++ symbol names). Fixes #1806
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SWIG:1: Error: Command encoder no longer supported - use regex encoder instead.
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