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#+title: hcel
hcel is an indexer and a server of Haskell package source code. It
serves indexed packages through JSON API.
It is a fork of [[https://github.com/alexwl/haskell-code-explorer][Haskell Code Explorer]], and works with GHC-9.2.2 with
Cabal-3.6.2.0, and possibly other adjacent versions.
It also has an emacs client.
* Install
#+begin_src sh
cabal install
#+end_src
* Usage
You'll need to index a package before serving it.
A typical indexing workflow is as follows, take sqlite-simple as an
example:
#+begin_src sh
cabal unpack sqlite-simple
cd sqlite-simple-x.y.z.w
cabal configure --enable-testsuites --enable-benchmarks
cabal build all
haskell-code-indexer -p .
#+end_src
After indexing the ./dist-newstyle directory is no longer by hcel and
can be removed to save space. To launch the server, run
#+begin_src sh
haskell-code-server -p /path/to/package1 -p /path/to/package2 ...
#+end_src
and it will be serving JSON at localhost:8080.
You can also hook up a local hoogle for documentation lookup:
#+begin_src sh
hoogle server
# configure a reverse proxy to hook it up with a domain say https://hoogle.localhost with self-signed cert, then run
haskell-code-server -p /path/to/package1 -p /path/to/package2 --use-hoogle-api --hoogle-api https://hoogle.localhost/ --disable-hoogle-api-cert-check
#+end_src
TODO: document the API endpoints.
* Emacs client
You may find an emacs client called hc.el at
<https://g.ypei.me/hc.el.git>.
* Contact and Copyright
hcel is maintained by Yuchen Pei (id@ypei.org).
The original [[https://github.com/alexwl/haskell-code-explorer][haskell-code-explorer]] is under the [[https://www.gnu.org/licenses/license-list.html#Expat][expat license]], whereas
the changes are covered by [[https://www.gnu.org/licenses/agpl-3.0.en.html][GNU AGPLv3+]]. You may find the license text
in a file named COPYING.agpl3 in the project tree. As a combination,
this work as a whole is covered by the terms of [[https://www.gnu.org/licenses/agpl-3.0.en.html][GNU AGPLv3+]] ([[https://www.gnu.org/licenses/gpl-faq.html#WhatDoesCompatMean][why?]]).
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