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feat: static site generator

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gabriel-doriath-dohler 2023-06-13 23:59:59 +00:00
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use flake

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/.direnv
# Nix build
result
# Haskell
.stack-work
_cache
dist-newstyle
.ghc.environment.*

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# dgnum.eu
This is the website for dgnum.eu
Enable nix flakes and install direnv.
## Deploy
TODO auto deploy from master using gitea hooks.
## Build Static Site
```
nix build
```
## Writing Posts
```console
direnv allow
cd site
ssg clean
ssg rebuild
ssg watch
```
## Working on the Static Site Generator
```console
nix develop .#ssg
cd ssg
```

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{
"nodes": {
"flake-utils": {
"inputs": {
"systems": "systems"
},
"locked": {
"lastModified": 1685518550,
"narHash": "sha256-o2d0KcvaXzTrPRIo0kOLV0/QXHhDQ5DTi+OxcjO8xqY=",
"owner": "numtide",
"repo": "flake-utils",
"rev": "a1720a10a6cfe8234c0e93907ffe81be440f4cef",
"type": "github"
},
"original": {
"owner": "numtide",
"repo": "flake-utils",
"type": "github"
}
},
"nixpkgs": {
"locked": {
"lastModified": 1686501370,
"narHash": "sha256-G0WuM9fqTPRc2URKP9Lgi5nhZMqsfHGrdEbrLvAPJcg=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "75a5ebf473cd60148ba9aec0d219f72e5cf52519",
"type": "github"
},
"original": {
"id": "nixpkgs",
"ref": "nixos-unstable",
"type": "indirect"
}
},
"root": {
"inputs": {
"flake-utils": "flake-utils",
"nixpkgs": "nixpkgs"
}
},
"systems": {
"locked": {
"lastModified": 1681028828,
"narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
"owner": "nix-systems",
"repo": "default",
"rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
"type": "github"
},
"original": {
"owner": "nix-systems",
"repo": "default",
"type": "github"
}
}
},
"root": "root",
"version": 7
}

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{
description = "Website for dgnum.eu";
inputs = {
nixpkgs.url = "nixpkgs/nixos-unstable";
flake-utils.url = "github:numtide/flake-utils";
};
outputs = { self, nixpkgs, flake-utils }:
flake-utils.lib.eachDefaultSystem (system:
let
pkgs = nixpkgs.legacyPackages.${system};
ssg = pkgs.callPackage ./ssg { };
defaultInputs = with pkgs; [ nixfmt shellcheck ];
in {
formatter = pkgs.nixfmt;
devShells = {
default = pkgs.mkShell { buildInputs = [ ssg ] ++ defaultInputs; };
ssg = pkgs.haskellPackages.shellFor {
packages = _: [ ssg ];
buildInputs = with pkgs.haskellPackages;
[ cabal-install ghcid hlint ] ++ defaultInputs;
};
};
packages = {
inherit ssg;
site = pkgs.callPackage ./site { inherit ssg; };
};
defaultPackage = self.packages.${system}.site;
});
}

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{ haskellPackages, locale, nix-gitignore }:
let srcs = nix-gitignore.gitignoreSourcePure ../.gitignore ./.;
in haskellPackages.callCabal2nix "ssg" srcs { }

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cabal-version: 3.0
name: ssg
version: 0.1.0.0
build-type: Simple
license: Apache-2.0
license-file: LICENSE
author: Gabriel Doriath Döhler
maintainer: gdd@dgnum.eu
copyright: Copyright 2023 Gabriel Doriath Döhler
executable ssg
main-is: ssg.hs
build-depends: base ^>=4.16.4.0
, blaze-html
, blaze-markup
, hakyll
, pandoc
, pandoc-types
ghc-options: -Wall
-threaded
-rtsopts
-with-rtsopts=-N
default-language: Haskell2010

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-- Copyright 2023 Gabriel Doriath Döhler, Délégation Générale Numérique (DGNum)
{-# LANGUAGE OverloadedStrings #-}
import Control.Applicative ((<|>))
import Control.Monad ((<=<), void)
import Data.Monoid (First(..))
import Data.List (intersperse)
import qualified Text.Blaze.Html5 as H
import qualified Text.Blaze.Html5.Attributes as A
import Text.Pandoc.Walk (query, walk)
import Text.Pandoc.Definition
( Pandoc(..), Block(Header, Para, Plain), Inline(..) )
import Text.Pandoc.Options ( WriterOptions(..), HTMLMathMethod( MathML ) )
import Hakyll
--------------------------------------------------------------------------------
nbPostsHome :: Int
nbPostsHome = 30
patternFrom :: [String] -> [String] -> Pattern
patternFrom basenames extensions =
foldl1 (.||.) $ map aux basenames
where
aux basename =
foldl1 (.||.) $ map (fromGlob . (++) (basename ++ "/**.")) extensions
postPattern :: Pattern
postPattern = patternFrom [ "posts" ] [ "md" ]
imgPattern :: Pattern
imgPattern = patternFrom [ ".", "images" ] [ "png", "jpeg", "jpg", "gif", "svg", "ico" ]
docPattern :: Pattern
docPattern = patternFrom [ ".", "docs" ] [ "pdf", "ps", "djvu", "tex", "txt" ]
.||. patternFrom [ "docs" ] [ "md" ]
miscPattern :: Pattern
miscPattern = foldl1 (.||.) [ "about.md", "services.md", "FAQ.md", "contact.md" ]
--------------------------------------------------------------------------------
main :: IO ()
main = hakyllWith config $ do
tags <- extractTags
authors <- extractAuthors
poles <- extractPoles
tagsRules tags $ \tagStr tagsPattern -> do
let title = "Articles appartenant à la catégorie \"" ++ tagStr ++ "\""
route idRoute
compile $ do
posts <- loadAll tagsPattern >>= recentFirst
let ctx =
constField "title" title
<> listField "posts" postCtx (return posts)
<> context
makeItem ""
>>= loadAndApplyTemplate "templates/tag.html" ctx
>>= loadAndApplyTemplate "templates/default.html" ctx
>>= relativizeUrls
tagsRules authors $ \authorStr authorsPattern -> do
let title = "Articles (co-)écrit par \"" ++ authorStr ++ "\""
route idRoute
compile $ do
posts <- loadAll authorsPattern >>= recentFirst
let ctx =
constField "title" title
<> listField "posts" postCtx (return posts)
<> context
makeItem ""
>>= loadAndApplyTemplate "templates/author.html" ctx
>>= loadAndApplyTemplate "templates/default.html" ctx
>>= relativizeUrls
tagsRules poles $ \poleStr polesPattern -> do
let title = "Articles du pôle \"" ++ poleStr ++ "\""
route idRoute
compile $ do
posts <- loadAll polesPattern >>= recentFirst
let ctx =
constField "title" title
<> listField "posts" postCtx (return posts)
<> context
makeItem ""
>>= loadAndApplyTemplate "templates/pole.html" ctx
>>= loadAndApplyTemplate "templates/default.html" ctx
>>= relativizeUrls
create [ "tags.html" ] $ do
route idRoute
compile $ renderTagList tags >>= tagCompiler
create [ "authors.html" ] $ do
route idRoute
compile $ renderTagList authors >>= authorCompiler
match (imgPattern .||. docPattern) $ do
route idRoute
compile copyFileCompiler
match "css/*.css" $ do
route idRoute
compile compressCssCompiler
match miscPattern $ do
route $ setExtension "html"
compile $ customPandocCompiler
>>= loadAndApplyTemplate "templates/default.html" context
>>= relativizeUrls
match postPattern $ do
route $ setExtension "html"
compile $ customPandocCompiler
>>= loadAndApplyTemplate "templates/post.html" (postCtxWith tags authors poles)
>>= loadAndApplyTemplate "templates/default.html" (postCtxWith tags authors poles)
>>= relativizeUrls
match (postPattern .||. miscPattern) $ version "raw" $ do
route $ setExtension "md"
compile $ getResourceBody >>= relativizeUrls
create [ "archive.html" ] $ do
route idRoute
compile $ do
posts <- recentFirst =<< loadAll (postPattern .&&. hasNoVersion)
let archiveCtx =
listField "posts" postCtx (return posts)
<> constField "title" "Archives"
<> context
makeItem ""
>>= loadAndApplyTemplate "templates/archive.html" archiveCtx
>>= loadAndApplyTemplate "templates/default.html" archiveCtx
>>= relativizeUrls
match "index.html" $ do
route idRoute
compile $ do
allPosts <- recentFirst =<< loadAll (postPattern .&&. hasNoVersion)
let posts = take nbPostsHome allPosts
let indexCtx =
listField "posts" postCtx (return posts)
<> constField "title" "Accueil"
<> context
getResourceBody
>>= applyAsTemplate indexCtx
>>= loadAndApplyTemplate "templates/default.html" indexCtx
>>= relativizeUrls
match "templates/*.html" $ compile templateBodyCompiler
--------------------------------------------------------------------------------
abstract :: Pandoc -> Maybe [Inline]
abstract (Pandoc _ blocks) =
markedUp blocks <|> fallback blocks
where
markedUp = fmap getFirst . query $ \inl -> case inl of
Span (_, cls, _) inls | "abstract" `elem` cls -> First (Just inls)
_ -> mempty
fallback (Para inlines : Header _ _ _ : _) = Just inlines
fallback (_ : t) = fallback t
fallback [] = Nothing
customPandocCompiler :: Compiler (Item String)
customPandocCompiler = pandocCompilerWithTransformM
defaultHakyllReaderOptions
defaultHakyllWriterOptions { writerHTMLMathMethod = MathML }
(\pandoc -> do
let render = fmap writePandoc . makeItem . Pandoc mempty . pure . Plain
maybe
(pure ())
(void . (saveSnapshot "abstract" <=< render))
(abstract pandoc)
pure $ addSectionLinks pandoc
) >>= relativizeUrls
addSectionLinks :: Pandoc -> Pandoc
addSectionLinks = walk f where
f (Header n attr@(idAttr, _, _) inlines) =
let link = Link ("", ["section"], []) [Str "§"] ("#" <> idAttr, "")
in Header n attr ([link, Space] <> inlines)
f x = x
snapshotField :: String -> Snapshot -> Context String
snapshotField key snap = field key $ \item ->
loadSnapshotBody (itemIdentifier item) snap
context :: Context String
context =
mapContext escapeHtml metadataField
<> snapshotField "abstract" "abstract"
<> defaultContext
postCtx :: Context String
postCtx =
dateField "date" "%Y-%m-%d"
<> context
postCtxWith :: Tags -> Tags -> Tags -> Context String
postCtxWith tags authors poles
= tagsFieldWith getPoles simpleRenderLink (mconcat . intersperse ", ") "poles" poles
<> tagsFieldWith getAuthors simpleRenderLink (mconcat . (\l -> if length l == 0 then [] else H.toHtml ("par " :: String):l) . intersperse ", ") "author" authors
<> tagsFieldWith getAuthors licenseRenderLink (mconcat . intersperse ", " . (\l -> if length l == 0 then [] else l ++ [H.toHtml ("and" :: String)])) "authorLicense" authors
<> tagsField "tags" tags
<> postCtx
tagCompiler :: String -> Compiler (Item String)
tagCompiler tags =
makeItem ""
>>= loadAndApplyTemplate "templates/tags.html" ctx
>>= loadAndApplyTemplate "templates/default.html" ctx
>>= relativizeUrls
where
prettyTags = replaceAll ", " (const "</li><li>") tags
ctx = constField "title" "Toutes les catégories" <> constField "alltags" prettyTags <> context
authorCompiler :: String -> Compiler (Item String)
authorCompiler authors =
makeItem ""
>>= loadAndApplyTemplate "templates/authors.html" ctx
>>= loadAndApplyTemplate "templates/default.html" ctx
>>= relativizeUrls
where
prettyAuthors = replaceAll ", " (const "</li><li>") authors
ctx = constField "title" "Tout les (co-)auteurs" <> constField "allauthors" prettyAuthors <> context
getAuthors :: MonadMetadata m => Identifier -> m [String]
getAuthors identifier = do
metadata <- getMetadata identifier
return $ maybe [] (map trim . splitAll ",") $ lookupString "author" metadata
getPoles :: MonadMetadata m => Identifier -> m [String]
getPoles identifier = do
metadata <- getMetadata identifier
return $ maybe [] (map trim . splitAll ",") $ lookupString "poles" metadata
extractTags :: Rules Tags
extractTags = do
tags <- buildTags postPattern $ fromCapture "tags/*.html"
return $ sortTagsBy caseInsensitiveTags tags
extractAuthors :: Rules Tags
extractAuthors = do
authors <- buildTagsWith getAuthors postPattern $ fromCapture "authors/*.html"
return $ sortTagsBy caseInsensitiveTags authors
extractPoles :: Rules Tags
extractPoles = do
poles <- buildTagsWith getPoles postPattern $ fromCapture "poles/*.html"
return $ sortTagsBy caseInsensitiveTags poles
simpleRenderLink :: String -> (Maybe FilePath) -> Maybe H.Html
simpleRenderLink _ Nothing = Nothing
simpleRenderLink tag (Just filePath) =
Just $ H.a H.! A.href (H.toValue $ toUrl filePath) $ H.toHtml tag
licenseRenderLink :: String -> (Maybe FilePath) -> Maybe H.Html
licenseRenderLink _ Nothing = Nothing
licenseRenderLink tag (Just filePath) =
Just $ H.a H.! A.href (H.toValue $ toUrl filePath) H.! A.rel "cc:attributionURL dct:creator" $ H.toHtml tag
config :: Configuration
config = defaultConfiguration { destinationDirectory = "result" }