Duplicate compile/createProgram functions

[nguerrera]

We have an exported function compile that is a purely redundant wrapper around createProgam. Should we remove it and just use createProgram everywhere? Or do we prefer the compile name? It feels like we shouldn't be exporting both as it's confusing and I was wondering if there was a difference when noticing that both are used in different places.

https://github.com/microsoft/cadl/blob/c78697eb2502a5f52139c0b6911e146def449e25/packages/compiler/core/program.ts#L965-L971

[bterlson]

compile is a verb you would likely look for if using Cadl as a library so I would say I like it better. I think at some point there was some work happening in compile but it went away.

[markcowl]

• Make the single method for compilation 'compile'
• deprecate 'createProgram' for 1 release