Re: Custom cabal builds for pandoc 3.*?

[John MacFarlane <fiddlosopher-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

> On Mar 15, 2023, at 9:11 AM, Jim Pryor <jim.pryor.nyu-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> 
> I used to follow the instructions at <https://pandoc.org/installing.html#custom-cabal-method> to build pandoc with the cabal configure `--flags="embed_data_files lua53"`.
> 
> Since `git pull`ing to the pandoc 3.* source tree, this no longer builds an executable. I see from the Pandoc 3.0 announcement on this list that the packaging has split in some ways.
> 
> Is it still possible to build all the components with custom cabal configure flags? How do I go about it? Can I just cd to the `pandoc-cli` subdirectory and do the following there:
> 
> ```
> cabal update
> cabal install --only-dependencies
> 
> cabal configure --prefix=/usr/local --flags="embed_data_files lua53"
> 
> cabal build
> 
> ./dist-newstyle/build/x86_64-osx/ghc-*/pandoc-*/x/pandoc/build/pandoc/pandoc --version
> 
> ```


Something like this should work, but there have been changes in both pandoc and cabal since the instructions were composed, so they may need some adjusting. Try it?

You'll want to add lua and server to your flags if you want the executable to have Lua and server support, respectively.  lua53 is no longer available, sorry.

> 
> Or do I have to first run those steps in the top-level directory, then do `cabal install`, then repeat them in the `pandoc-cli` subdirectory? When I try to only do the steps in the `pandoc-cli` subdirectory, it seems like a binary version of the main `pandoc` library is being downloaded, rather than one built using my custom configure flags.

cabal never downloads binaries, only source. If it's happening quickly, it could be because your global cabal store already contains a built version of the library.


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