Preparing for publication.

- license
- cabal
- readme

10 files changed, 858 insertions, 24 deletions

diff --git a/README.md b/README.md
index 530e752d..2f442d6b 100644
--- a/README.md
+++ b/README.md
@@ -12,8 +12,12 @@ This project consists of three packages:
     wrapper around `haddock-api`'s `Documentation.Haddock.haddock` function.
 
  * `haddock-api`: contains the program logic of the `haddock` tool.
-   [The haddocks for the `Documentation.Haddock` module][Documentation.Haddock]
-   offer a good overview of the functionality.
+   [The haddocks for the `Documentation.Haddock`
+   module][Documentation.Haddock] offer a good overview of the
+   functionality.  However, this distribution comes with a modified
+   version `haddorg-api` which adds an org backend.  See
+   [haddock-api/README.org](haddock-api/README.org) for more
+   information.
 
  * `haddock-library`: is concerned with the parsing and processing of the
    Haddock markup language. Unlike the other packages, it is expected to build
diff --git a/haddock-api/COPYING.agpl3 b/haddock-api/COPYING.agpl3
new file mode 100644
index 00000000..be3f7b28
--- /dev/null
+++ b/haddock-api/COPYING.agpl3
@@ -0,0 +1,661 @@
+                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
+
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+versions of the GNU Affero General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source.  For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code.  There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+<https://www.gnu.org/licenses/>.
diff --git a/haddock-api/LICENSE b/haddock-api/COPYING.freebsd
index d5f0b37c..d5f0b37c 100644
--- a/haddock-api/LICENSE
+++ b/haddock-api/COPYING.freebsd
diff --git a/haddock-api/README.org b/haddock-api/README.org
new file mode 100644
index 00000000..4a00483c
--- /dev/null
+++ b/haddock-api/README.org
@@ -0,0 +1,127 @@
+* haddorg-api
+
+** Overview
+
+Haddock is a documentation generator for Haskell libraries and it
+supports several backends including HTML, latex and hoogle.  The
+program logic of the ~haddock~ tool is is the ~haddock-api~ package.
+
+~haddorg-api~ adds an org backend of ~haddock-api~, so that one can
+invoke haddock to generate org files, of the Org Mode.
+
+** Examples
+
+- base-4.16.1.org
+- ghc-lib-parser.org, pretending to be ghc (fake ghc)
+- lens
+- haddorg-api-2.26.1.org, also in this repository
+- haddock-library-2.26.1.org
+- haddorg-api + haddock-library + fake ghc + base, to demo
+  cross-package links
+- fsd + sqlite-simple + debian, to demo cross-package links
+- and more...
+
+** Install
+
+#+begin_src sh
+git clone https://g.ypei.me/haddock.git
+cd haddock
+cabal install
+#+end_src
+
+This will create a haddock binary under ~~/.cabal/bin~ - make sure it
+is in your PATH.
+
+To make cabal use the haddock built with ~haddorg-api~, modify the
+~haddock-ghc-x.y.z~ shell script, where ~x.y.z~ is the GHC version.
+
+The file ~haddock-ghc-x.y.z~ is located in the same directory as your
+~ghc-x.y.z~ binary.  The following command should print its path
+
+#+begin_src sh
+readlink -f `which ghc` | sed 's/\(.*\)ghc\(.*\)/\1haddock-ghc\2/'
+#+end_src
+
+For example, if you use ghcup and ghc-9.2.2, then the path should be
+~$HOME/.ghcup/ghc/9.2.2/bin/haddock-ghc-9.2.2~.
+
+Once you have located the correct ~haddock-ghc~ script, modify it by
+updating the ~exedir~ with the ~"$HOME/.cabal/bin"~:
+
+#+begin_src sh
+#!/bin/sh
+exedir="$HOME/.cabal/bin" # <- update this line
+exeprog="haddock"
+# ...
+#+end_src
+
+** Usage
+
+~haddorg-api~ adds an ~--org~ flag to the ~haddock~ command.
+
+*** Direct invocation
+
+#+begin_src sh
+haddock Hello.hs --org
+#+end_src
+
+*** With cabal
+After telling cabal to use haddock built with haddorg-api (see
+[[Install]]), cd into the package you want to build the org documentation
+for, and run:
+
+#+begin_src sh
+cabal haddock --haddock-option=--org
+#+end_src
+
+If success, a fresh new org documentation will be placed under the
+package directory.
+
+** Tips
+
+- If you want 
+
+** Coverage and areas for further work
+
+Most features and most packages should work.  However, there are some
+features to be completed.  Below is an incomplete list of missing
+features, with rare occurrences in real world haskell documentations
+marked by (RARE)
+
+- Infix declarations (currently all infix decls are shown as prefix)
+- Operator precendences
+- Minimal Signatures for classes operations
+- Correct linking due to distinction between top level identifiers and
+  constructors
+- (RARE) Data instance constructors
+- (RARE) Linear types
+- (RARE) Bundled patterns
+
+Some (rare) problems due to mismatch of haddock markup and org mode:
+
+- (RARE) Lack of distinction between inline and block elements in
+  haddock markup
+- (RARE) Table column and row spans
+
+Some cosmetic issues:
+
+- Relative heading depth for DocHeaders
+
+*** Linking issue
+
+One org file per package or one big org file containing all packages?
+Currently haddorg-api takes the former approach.  However, this may
+become unwieldy, especially when including large libraries like base
+and ghc.  Whereas the issue with having one file per package is
+correct linking.
+
+** License, copyright, contributing
+
+Haddock, including haddock-api and haddock-library is licensed under
+the FreeBSD license (aka BSD 2-Clause).  To contribute, see
+CONTRIBUTING.md.
+
+The Org backend written by Yuchen Pei is licensed under the GNU Affero
+GPL 3.0+.  See COPYING.agpl3 for the license text.  To report issues
+or send patches regarding the org backend, email Yuchen at
+<id@ypei.org>.
diff --git a/haddock-api/haddock-api.cabal b/haddock-api/haddorg-api.cabal
index 584abaf0..4c219808 100644
--- a/haddock-api/haddock-api.cabal
+++ b/haddock-api/haddorg-api.cabal
@@ -1,16 +1,14 @@
-cabal-version:        2.0
-name:                 haddock-api
-version:              2.26.0
-synopsis:             A documentation-generation tool for Haskell libraries
-description:          Haddock is a documentation-generation tool for Haskell
-                      libraries
-license:              BSD2
-license-file:         LICENSE
-author:               Simon Marlow, David Waern
-maintainer:           Alec Theriault <alec.theriault@gmail.com>, Alex Biehl <alexbiehl@gmail.com>, Simon Hengel <sol@typeful.net>, Mateusz Kowalczyk <fuuzetsu@fuuzetsu.co.uk>
-homepage:             http://www.haskell.org/haddock/
-bug-reports:          https://github.com/haskell/haddock/issues
-copyright:            (c) Simon Marlow, David Waern
+cabal-version:        2.2
+name:                 haddorg-api
+version:              2.26.1
+synopsis:             haddock-api with an org backend
+description:          This is haddorg-api.  It is a modified version of the Haddock API (haddock-api) with the addition of an Org Backend.
+license:              BSD-2-Clause AND AGPL-3.0-or-later
+license-files:        COPYING.freebsd, COPYING.agpl3
+author:               Haddock authors and Yuchen Pei
+maintainer:           Yuchen Pei <id@ypei.org>
+homepage:             https://g.ypei.me/haddorg.git
+copyright:            Copyright holders of haddock-api, and Yuchen Pei
 category:             Documentation
 build-type:           Simple
 tested-with:          GHC==9.2.*
@@ -125,10 +123,10 @@ library
     Haddock.GhcUtils
     Haddock.Syb
     Haddock.Convert
-    Paths_haddock_api
+    Paths_haddorg_api
 
   autogen-modules:
-    Paths_haddock_api
+    Paths_haddorg_api
 
 test-suite spec
   type:             exitcode-stdio-1.0
@@ -147,6 +145,8 @@ test-suite spec
     Haddock.Backends.Hyperlinker.Renderer
     Haddock.Backends.Hyperlinker.Utils
     Haddock.Backends.LaTeX
+    Haddock.Backends.Org
+    Haddock.Backends.Org.Types
     Haddock.Backends.Xhtml
     Haddock.Backends.Xhtml.Decl
     Haddock.Backends.Xhtml.DocMarkup
@@ -178,7 +178,7 @@ test-suite spec
     Haddock.Utils.Json.Types
     Haddock.Utils.Json.Parser
     Haddock.Version
-    Paths_haddock_api
+    Paths_haddorg_api
     Haddock.Backends.Hyperlinker.ParserSpec
     Haddock.Backends.Hyperlinker.Parser
     Haddock.Backends.Hyperlinker.Types
@@ -213,4 +213,4 @@ test-suite spec
 source-repository head
   type:     git
   subdir:   haddock-api
-  location: https://github.com/haskell/haddock.git
+  location: https://g.ypei.me/haddock.git
diff --git a/haddock-api/src/Haddock.hs b/haddock-api/src/Haddock.hs
index cae37c44..40cf8414 100644
--- a/haddock-api/src/Haddock.hs
+++ b/haddock-api/src/Haddock.hs
@@ -66,7 +66,7 @@ import System.FilePath
 import System.Environment (getExecutablePath)
 #else
 import qualified GHC.Paths as GhcPaths
-import Paths_haddock_api (getDataDir)
+import Paths_haddorg_api (getDataDir)
 #endif
 import System.Directory (doesDirectoryExist, getTemporaryDirectory)
 
diff --git a/haddock-api/src/Haddock/Backends/Org.hs b/haddock-api/src/Haddock/Backends/Org.hs
index 02582247..9d02d0db 100644
--- a/haddock-api/src/Haddock/Backends/Org.hs
+++ b/haddock-api/src/Haddock/Backends/Org.hs
@@ -1,3 +1,23 @@
+{-
+Copyright (C) 2022 Yuchen Pei.
+
+This file is part of haddorg-api.
+
+This file is free software: you can redistribute it and/or modify it
+under the terms of the GNU Affero General Public License as published
+by the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This file is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public
+License along with this file.  If not, see
+<https://www.gnu.org/licenses/>.
+-}
+
 {-# LANGUAGE RecordWildCards #-}
 {-# LANGUAGE TupleSections #-}
 {-# LANGUAGE FlexibleInstances #-}
diff --git a/haddock-api/src/Haddock/Backends/Org/Types.hs b/haddock-api/src/Haddock/Backends/Org/Types.hs
index 3bfc8619..9e3534c3 100644
--- a/haddock-api/src/Haddock/Backends/Org/Types.hs
+++ b/haddock-api/src/Haddock/Backends/Org/Types.hs
@@ -1,3 +1,23 @@
+{-
+Copyright (C) 2022 Yuchen Pei.
+
+This file is part of haddorg-api.
+
+This file is free software: you can redistribute it and/or modify it
+under the terms of the GNU Affero General Public License as published
+by the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This file is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public
+License along with this file.  If not, see
+<https://www.gnu.org/licenses/>.
+-}
+
 {-# LANGUAGE DeriveDataTypeable, DeriveGeneric, FlexibleContexts #-}
 {-# OPTIONS_GHC -fno-warn-orphans #-}
 
diff --git a/haddock-api/src/Haddock/Version.hs b/haddock-api/src/Haddock/Version.hs
index 4e9a581a..b2eb7031 100644
--- a/haddock-api/src/Haddock/Version.hs
+++ b/haddock-api/src/Haddock/Version.hs
@@ -16,7 +16,7 @@ module Haddock.Version (
 #ifdef IN_GHC_TREE
 import Paths_haddock ( version )
 #else
-import Paths_haddock_api ( version )
+import Paths_haddorg_api ( version )
 #endif
 import Data.Version  ( showVersion )
 
diff --git a/haddock.cabal b/haddock.cabal
index 088209fc..3fe3ccad 100644
--- a/haddock.cabal
+++ b/haddock.cabal
@@ -122,6 +122,8 @@ executable haddock
       Haddock.Backends.Xhtml.Themes
       Haddock.Backends.Xhtml.Types
       Haddock.Backends.Xhtml.Utils
+      Haddock.Backends.Org
+      Haddock.Backends.Org.Types
       Haddock.Backends.LaTeX
       Haddock.Backends.HaddockDB
       Haddock.Backends.Hoogle
@@ -147,8 +149,8 @@ executable haddock
 
   else
     -- in order for haddock's advertised version number to have proper meaning,
-    -- we pin down to a single haddock-api version.
-    build-depends:  haddock-api == 2.24.0
+    -- we pin down to a single haddorg-api version.
+    build-depends:  haddorg-api == 2.26.1
 
 test-suite html-test
   type:             exitcode-stdio-1.0
@@ -189,4 +191,4 @@ test-suite hoogle-test
 
 source-repository head
   type:     git
-  location: https://github.com/haskell/haddock.git
+  location: https://g.ypei.me/haddock.git