wip

.gitignore

@@ -1,5 +1,3 @@
 _site/
 _cache/
 dist/
-dist-newstyle/
-result*

contact.markdown

@@ -8,4 +8,3 @@ I live in Espoo Finland. You can contact me on any of the following services.
 - **Slack**: masser@functionalprogramming.slack.com
 - **IRC**: MasseR@freenode
 - **Mastodon**: MasseR@mastodon.social
-- **Keybase**: [https://keybase.io/MasseR](https://keybase.io/MasseR)

css/default.css

@@ -39,18 +39,6 @@ h2 {
   font-size: 2rem;
 }
 
-.projectlist {
-  display: flex;
-  align-items: center;
-  justify-content: space-between;
-}
-
-article.blog {
-  /* display: flex; */
-  /* align-items: center; */
-}
-
-
 article .header {
   font-size: 1.4rem;
   font-style: italic;
@@ -63,7 +51,6 @@ article .header {
   text-decoration: none;
 }
 
-
 @media (max-width: 319px) {
   body {
     width: 90%;
@@ -120,40 +107,14 @@ article .header {
     display: inline;
     margin: 0 0.6rem;
   }
-  div.sidebar-container {
-    /* display: grid; */
-    /* grid-template-columns: minmax(60%, 85%) 1fr; */
-  }
-  div.sidebar-container > div.sidebar {
-    padding-top: 2rem;
-    border-top: 0.2rem solid #000;
-  }
 }
 
-
 @media (min-width: 640px) {
   body {
-    width: 100rem;
+    width: 85rem;
     margin: 0 auto;
     padding: 0;
   }
-  div.sidebar-container {
-    display: grid;
-    grid-template-columns: minmax(60%, 85%) 1fr;
-  }
-  div.sidebar-container > div.sidebar {
-    padding-top: 0px;
-    padding-left: 2rem;
-    border-left: 0.2rem solid #000;
-    border-top: none;
-  }
-  article {
-    width: 60rem;
-  }
-  main {
-    display: flex;
-    justify-content: center;
-  }
   header {
     margin: 0 0 3rem;
     padding: 1.2rem 0;

css/highlight.css

@@ -1,6 +1,18 @@
 /* Generated by pandoc. */
-table.sourceCode, tr.sourceCode, td.lineNumbers, td.sourceCode, table.sourceCode pre
+table.sourceCode, tr.sourceCode, td.lineNumbers, td.sourceCode, table.sourceCode pre.sourceCode
-   { margin: 0; padding: 0; border: 0; vertical-align: baseline; border: none; }
+{
+  margin: 0;
+  padding: 0;
+  /* border: 0; */
+  vertical-align: baseline;
+}
+pre.sourceCode
+{
+  border: 1px solid #ccc;
+  background-color: rgb(238,238,255);
+  padding: 10px;
+  overflow: auto;
+}
 td.lineNumbers { border-right: 1px solid #AAAAAA; text-align: right; color: #AAAAAA; padding-right: 5px; padding-left: 5px; }
 td.sourceCode { padding-left: 5px; }
 .sourceCode span.kw { color: #007020; font-weight: bold; }

default.nix

@@ -1,8 +1,3 @@
-{ pkgs ? import <nixpkgs> {} }:
+{ haskellPackages, haskell }:
 
-with pkgs;
+haskell.lib.disableSharedExecutables (haskellPackages.callCabal2nix "site" ./. {})
-
-rec {
-  site = haskellPackages.callPackage ./site {};
-  rauhala-info = callPackage ./rauhala.info { site = site; };
-}

index.markdown

@@ -15,15 +15,12 @@ My [GPG key](./resources/2104943D6033C.txt)
 
 ### Notable experience and interests
 
-- **Relex Oy**
+- **Haskell**
-  - Working as a Senior Software Developer at Relex Oy
+  - Working on an internal Haskell based tool at Relex Oy
-  - Three distinct products, all of which written in Haskell
-    - Internal integration tool
-    - Relex Deploy 1, a tool for deploying the core product to hosts
-    - Relex Deploy 2, a tool for deploying the new and shiny core product to hosts
-- **Open source**
   - Some contributions to [darcshub](https://hub.darcs.net/)
   - Some contributions to [xmonad](https://github.com/xmonad)
+  - Dozens of personal projects, most of which ended up being just tests for
+    different libraries, techniques or algorithms.
 - **Systems integrations**
   - Working as a consultant from Avoltus Oy to different companies using
     [Mulesoft](https://developer.mulesoft.com/). Systems include webshops,
@@ -31,4 +28,4 @@ My [GPG key](./resources/2104943D6033C.txt)
 - **Java**
   - Bunch of different smaller projects while working at Avoltus Oy.
 - **Other**
-  - I was involved in creating an email advertising platform.
+  - I was involved in creating an email solicit platform.

js/api.js

@@ -0,0 +1,22 @@
+
+var getApiIpfsCurrent = function(onSuccess, onError) {
+  var xhr = new XMLHttpRequest();
+  xhr.open('GET', '/api/ipfs/current', true);
+  xhr.setRequestHeader('Accept', 'application/json');
+  xhr.onreadystatechange = function () {
+    var res = null;
+    if (xhr.readyState === 4) {
+      if (xhr.status === 204 || xhr.status === 205) {
+        onSuccess();
+      } else if (xhr.status >= 200 && xhr.status < 300) {
+        try { res = JSON.parse(xhr.responseText); } catch (e) { onError(e); }
+        if (res) onSuccess(res);
+      } else {
+        try { res = JSON.parse(xhr.responseText); } catch (e) { onError(e); }
+        if (res) onError(res);
+      }
+    }
+  };
+  xhr.send(null);
+};
+

js/app.js

@@ -0,0 +1,10 @@
+$(document).ready(function() {
+    var success = function(x) {
+	$("#ipfs > em").html(x);
+    };
+    var error = function(x) {
+	$("#ipfs").hide();
+	console.log("ipfs hash not found: " + x);
+    };
+    getApiIpfsCurrent(success, error);
+});

nixpkgs.json

@@ -1,7 +0,0 @@
-{
-  "url": "https://github.com/NixOS/nixpkgs",
-  "rev": "7e1f60dfbba67b975d1a77d710a6f1437fd9709c",
-  "date": "2020-02-01T09:20:37-05:00",
-  "sha256": "0vk55459iljr5dzwnr5661l44b0wdc15952lk2rjcmxr1620yr5v",
-  "fetchSubmodules": false
-}

posts/configs.md

@@ -0,0 +1,78 @@
+---
+title: Extensible configuration Pt. 1
+date: 2019-03-27
+---
+
+This is the first part of a series where I'm going through how to make
+extensible configuration. There is nothing groundbreaking or new in this
+series, it's just me going through different implementations and trying to
+understand them.
+
+The source material for this post is [the fixed point implementation](https://github.com/NixOS/nixpkgs/blob/master/lib/fixed-points.nix) for nix.
+
+By extensible configuration, I'm talking about nix style extensible
+configuration, like overlays, overrides and extensions. Let's see an example of
+an extensible configuration.
+
+``` nix
+{ haskellPackages, fetchFromGitHub }:
+
+let
+  purescript = fetchFromGitHub {
+    owner = "purescript";
+    repo = "purescript";
+    rev = "2cb4a6496052db726e099539be682b87585af494";
+    sha256 = "1v4gs08xnqgym6jj3drkzbic7ln3hfmflpbpij3qzwxsmqd2abr7";
+  }
+  hp = haskellPackages.extend (self: super: {
+    purescript = super.callCabal2nix "purescript" purescript {};
+  });
+
+in
+
+hp.purescript;
+```
+
+On a high level we are augmenting the `haskellPackages` attrset by replacing
+the existing purescript package with a different one. The extension is a
+function that takes two arguments, `self` and `super`. `super` is the original
+non-lazy value and `self` is the lazy value that corresponds to the value at
+end.
+
+The first step on this journey is done by getting to know `fix`. Fix is
+described being the least fixed point of a function. In practice it's a
+function allowing declaring recursive functions without explicit recursion.
+
+``` nix
+fix = f: let x = f x; in x
+```
+
+With fix you can have access to the lazy `self` value. It's value is whatever
+would have been computed in the end. As it is lazy, it is possible to end up in
+a recursive loop if there is a cyclic dependency.
+
+``` nix
+let recursive = fix (self: {
+  foo = 3;
+  bar = self.foo + 1;
+});
+infinite = fix (self: {
+  foo = self.bar + 1;
+  bar = self.foo + 1;
+});
+```
+
+You can try those yourself. The first version is fine and returns an attrset
+like you would expect. The second one has a cyclic dependency and nix helpfully
+errors out.
+
+The next step is making a function that has access to the unmodified original
+values. This is managed through the `extends` function. It took a while for me to understand what's happening in there, but luckily nix has [good documentation](https://github.com/NixOS/nixpkgs/blob/67b1265fb3d38ead5a57fee838405a2d997777c2/lib/fixed-points.nix#L37-L65) for it.
+
+``` nix
+extends = f: rattrs: self: let super = rattrs self; in super // f self super
+```
+
+- https://elvishjerricco.github.io/2017/04/01/nix-style-configs-in-haskell.html
+- https://github.com/NixOS/nixpkgs/blob/master/lib/fixed-points.nix
+- https://chshersh.github.io/posts/2019-03-25-comonadic-builders

posts/demobot.md

@@ -0,0 +1,148 @@
+---
+title: Functional architecture Pt. 1
+date: 2018-12-25
+---
+
+
+I'm lucky enough to work with Haskell professionally which gives me some view
+to good and maintainable real world architecture. In my opinion, one of the
+biggest contributing factors to how your general architecture is defined, is
+determined by the base application monad stack you are using.
+
+Our actual product is mostly in the regular `LoggingT (ReaderT app IO)` base
+monad with whatever style you would imagine with that base monad in place. It's
+not entirely consistent, but close enough.
+
+With all the talk about just having `IO`, `ReaderT app IO`, free monads or
+tagless final monads, I thought of trying different styles. For this post I'm
+focusing on the tagless final since it's most interesting for me right now.
+
+`IO`
+
+:   The most basic style. This is pretty much only suitable for the most basic
+of needs.
+
+`ReaderT app IO`
+
+:   How we mostly define the base monad. This is a really good way of doing
+things, it gives you a lot of leeway on how you can define the rest of your
+application.
+
+`Free monads`
+
+:   Free monads are a way of having a small constrained DSL or monad stack for
+defining your application. By constraining the user, you are also reducing the
+area for bugs. There is also some possibility for introspection, but usually
+this isn't a usable feature. Also since free monad applications need the full
+AST, they're quite a bit slower than the other solutions.
+
+`Tagless final`
+
+:   This is something I'm the least familiar with. If I have understood
+correctly, free monads and tagless final are more or less equivalent solutions
+in their power, but in tagless final you aren't creating the AST anywhere,
+which also means that you aren't paying for it either.
+
+That out of the way, I had a small project idea for a bot that's easy to
+contribute to, difficult to make errors and easy to reason about. The project
+is at most a proof-of-concept and most definitely not production quality.
+Still, I hope it's complex enough to showcase the architecture.
+
+The full source code is available [at my git repository](https://git.rauhala.info/MasseR/demobot).
+
+For the architecture to make sense, let me introduce two different actors: a
+*core contributor* that's familiar with Haskell and a *external contributor*
+that's familiar with programming, not necessarily with Haskell.
+
+The repository is split into two parts, the library and the application.
+
+The library
+
+:   Provides the restricted monad classes (tagless final), extension points and
+the core bot main loop.
+
+The application
+
+:   Provides the implementation for the tagless final type classes, meaning
+that the application defines how the networking stack is handled, how database
+connectivity is done and so on. It also collects all the extensions for that
+specific application.
+
+The *core contributor* is responsible for maintaining the library as well as
+the type class instances for the application type. The *external contributor*
+is responsible for maintaining one or multiple extensions that are restricted
+in their capability and complexity.
+
+I'm restricting the capabilities of the monad in the library and extensions,
+meaning that I'm not allowing any IO. For example the networking is handled by
+a single `MonadNetwork` type class. This is the most complex type class in the
+library right now, using type families for defining a specific extension point
+for the messages. This could be something like 'event type' for Flowdock
+messages or 'source channel' for IRC messages.
+
+~~~haskell
+data Request meta = Request { content :: Text
+                            , meta    :: meta }
+data Response meta = Response { content :: Text
+                              , meta    :: meta }
+
+class Monad m => MonadNetwork m where
+  type Meta m :: *
+  recvMsg :: m (Request (Meta m))
+  putMsg :: Response (Meta m) -> m ()
+~~~
+
+Then we have the extension point which is more or less just a `Request -> m (Maybe Response)`. I'm using rank n types here for qualifying the `Meta`
+extension point and forcing the allowed type classes to be a subset of the
+application monad stack, I don't want extension writers to be able to write
+messages to the bot network by themselves.
+
+~~~haskell
+data Extension meta =
+  Extension { act :: forall m. (meta ~ Meta m, MonadExtension m) => Request meta -> m (Maybe (Response meta))
+            , name   :: String }
+~~~
+
+Last part of the library is the main loop, which is basically a free monad
+(tagless final) waiting for an interpreter. At least in this POC I find this
+style to be really good, it's really simplified, easy to read and hides a lot
+of the complexity, while bringing forth the core algorithm.
+
+~~~haskell
+mainLoop :: forall m. (MonadCatch m, MonadBot m) => [Extension (Meta m)] -> m ()
+mainLoop extensions = forever $ catch go handleFail
+  where
+    handleFail :: SomeException -> m ()
+    handleFail e = logError $ tshow e
+    go :: m ()
+    go = do
+      msg <- recvMsg
+      responses <- catMaybes <$> mapM (`act` msg) extensions
+      mapM_ putMsg responses
+~~~
+
+Then comes the actual application where we write the effectful interpreters. In
+this POC the interpreter is just a `LoggingT IO a` with the semantics of
+stdin/stdout. This is the only file where we're actually interacting with the
+outside world, everything else is just pure code.
+
+~~~haskell
+instance MonadNetwork AppM where
+  type Meta AppM = ()
+  recvMsg = Request <$> liftIO T.getLine <*> pure ()
+  putMsg Response{..} = liftIO . T.putStrLn $ content
+~~~
+
+Writing the extensions was the responsibility of *external contributors* and we
+already saw how the actual extension point was defined above. Using these
+extension points is really simple and here we see how the implementation is
+just a simple `Request -> m (Maybe Response)`.
+
+~~~haskell
+extension :: Extension ()
+extension = Extension{..}
+  where
+    name = "hello world"
+    act Request{..} | "hello" `T.isPrefixOf` content = return $ Just $ Response "Hello to you" ()
+                    | otherwise = return Nothing
+~~~

rauhala.info/.envrc

@@ -1 +0,0 @@
-use nix

rauhala.info/.gitignore

@@ -1,2 +0,0 @@
-_site
-_cache

rauhala.info/default.nix

@@ -1,24 +0,0 @@
-{ stdenv, glibcLocales, site }:
-
-stdenv.mkDerivation {
-  pname = "rauhala.info";
-  version = "0.1.0";
-
-  src = builtins.filterSource (path: type: baseNameOf path != "_cache" && baseNameOf path != "_site") ./.;
-
-  phases = ["buildPhase" "installPhase"];
-
-
-  buildPhase = ''
-    export LOCALE_ARCHIVE="${glibcLocales}/lib/locale/locale-archive"
-    export LANG=en_US.UTF-8
-
-    cp -r $src/* .
-    ${site}/bin/site build
-  '';
-
-  installPhase = ''
-    mkdir -p $out/share/
-    cp -r _site/* $out/share/
-  '';
-}

rauhala.info/posts/2021-01-26-Tests-with-Deriving.md

@@ -1,254 +0,0 @@
----
-title: Tests with Deriving Via
-tags: haskell, testing, pbt
----
-
-I have been using both `hedgehog` and `QuickCheck` based property-based testing
-frameworks, I'm fairly comfortable in writing tests and generators in both.
-Theoretical aspects aside, for a user, I feel like `hedgehog` is more
-ergonomic as it does automatic shrinking *and* does away with typeclasses. The
-former is important as writing good shrinkers is hard, remembering to write
-shrinkers is even harder. The latter is important when you need to modify your
-generation for some tests.
-
-In this post, I'll show that using `DerivingVia` extension and generic
-coercions can help you write almost as ergonomic `Arbitrary` definitions for
-`QuickCheck`. The initial idea is taken from the
-[Deriving Via](https://www.kosmikus.org/DerivingVia/deriving-via-paper.pdf) paper,
-but taken a little bit further. This post assumes some level of understanding
-of type level programming.
-
-For the examples, we're using a `Person` as shown in the examples below. The
-test we'll implement will be the `tripping` property. For the *expected*
-values, the `name` is something name-like and `age` is a range between 1-99.
-
-I'll use `hedgehog` to write the ideal case. The generator is light-weight, but
-has been customized for the business case. I'm using the `hedgehog-corpus`
-package for the name-like generation.
-
-``` haskell
-import GHC.Generics (Generic)
-
-import Data.Text (Text)
-
-import qualified Data.Aeson as A
-
-import Hedgehog
-import qualified Hedgehog.Gen as Gen
-import qualified Hedgehog.Range as Range
-import qualified Hedgehog.Corpus as Corpus
-
-data Person
-  = Person { name :: Text
-           , age :: Int
-           }
-  deriving stock (Show, Eq, Generic)
-  deriving anyclass (A.ToJSON, A.FromJSON)
-
-genValidPerson :: Gen Person
-genValidPerson =
-  Person <$> Gen.element Corpus.simpsons
-         <*> Gen.integral (Range.linear 0 99)
-
-prop_encoding :: Property
-prop_encoding = property $ do
-  p <- forAll genValidPerson
-  pure p === A.eitherDecode (A.encode p)
-```
-
-For comparison, this is what I would write with QuickCheck without any helpers.
-There's quite a bit of added complexity, especially in the shrinker, and only
-with two fields.
-
-``` haskell
-import GHC.Generics (Generic)
-
-import Data.Text (Text)
-import qualified Data.Aeson as A
-
-import Test.QuickCheck
-
-data Person
-  = Person { name :: Text
-           , age :: Int
-           }
-  deriving stock (Show, Eq, Generic)
-  deriving anyclass (A.ToJSON, A.FromJSON)
-
-instance Arbitrary Person where
-  arbitrary = Person <$> elements simpsons <*> choose (1,99)
-    where
-      simpsons = ["bart", "marge", "homer", "lisa", "ned"]
-  shrink Person{name,age} =
-    [Person name' age'
-    | name' <- [name]
-    , age' <- shrinkIntegral age
-    , age' >= 1
-    , age' <= 99
-    ]
-
-prop_encoding :: Person -> Property
-prop_encoding p = pure p === A.eitherDecode (A.encode p)
-```
-
-Good, now that the base is done, let's see what we can do about making
-`QuickCheck` more ergonomic. The solution I'm outlining here relies on these
-features.
-
-- `DerivingVia` extension which can automatically generate instances for you if two types are `Coercible`
-- Isomorphism between the `Generic` representation of two types. For example `(a,b)` has a `Generic` representation that is the same as `data Foo = Foo a b`
-- `QuickCheck` modifiers, for example `PrintableString` which modify the arbitrary generation
-
-The paper defines this piece of code for deriving `Arbitrary` instances for
-anything that is generically isomorphic to something that is already an
-instance.
-
-``` haskell
-newtype SameRepAs a b = SameRepAs a
-
-instance
-  ( Generic a
-  , Generic b
-  , Arbitrary b
-  , Coercible (Rep a ()) (Rep b ())
-  )
-  => Arbitrary (a `SameRepAs` b) where
-  arbitrary = SameRepAs . coerceViaRep <$> arbitrary
-    where
-      coerceViaRep :: b -> a
-      coerceViaRep =
-        to . (coerce :: Rep b () -> Rep a ()) . from
-```
-
-For my implementation, I'll be cleaning the code from the paper. I'm swapping
-the type parameters of the newtype and extract the coercion function to
-top-level so that I can define the `shrink` as well.
-
-``` haskell
-newtype Isomorphic a b = Isomorphic b
-
-type GenericCoercible a b =
-  ( Generic a
-  , Generic b
-  , Coercible (Rep a ()) (Rep b ())
-  )
-
-genericCoerce :: forall a b. GenericCoercible a b => a -> b
-genericCoerce =
-  to . (coerce @(Rep a ()) @(Rep b ())) . from
-
-instance
-  ( Arbitrary a
-  , GenericCoercible a b
-  )
-  => Arbitrary (a `Isomorphic` b) where
-  arbitrary = Isomorphic . genericCoerce @a @b <$> arbitrary
-  shrink (Isomorphic b) =
-    Isomorphic . genericCoerce @a @b
-      <$> shrink (genericCoerce @b @a b)
-```
-
-With this, we can now write `Arbitrary` instances using the tuple
-representation as an intermediary. At least as long as the child types have
-their instances properly set.
-
-``` haskell
-data Person
-  = Person { name :: Text
-           , age :: Int
-           }
-  deriving stock (Show, Eq, Generic)
-  deriving anyclass (A.ToJSON, A.FromJSON)
-  deriving (Arbitrary) via ((Text, Int) `Isomorphic` Person)
-```
-
-This is already a marked improvement to the original `Arbitrary` instance we
-wrote, but this does not yet satisfy our original requirement of generating
-only 'valid' persons. I would like to modify the instance generation on a more
-ad-hoc fashion. For this to happen, I would need some *modifiers* that control
-the arbitrary generation.  I would like to write something like the instance
-below.
-
-``` haskell
-type Simpsons = '["marge", "bart", "homer", "lisa", "ned"]
-data Person
-  = Person { name :: Text
-           , age :: Int
-           }
-  deriving stock (Show, Eq, Generic)
-  deriving anyclass (A.ToJSON, A.FromJSON)
-  deriving (Arbitrary)
-    via ((Corpus Simpsons Text, Range 1 99 Int) `Isomorphic` Person)
-```
-
-
-Let's start by defining the `Range` as it's more straightforward. This is just
-a `newtype` with a couple of phantom type variables, which is used in choosing
-the range of the generator. Shrinking is already quite complex (and probably
-not optimal!), I wouldn't want to write this multiple times.
-
-``` haskell
-newtype Range (from :: Nat) (to :: Nat) a = Range a
-
-instance
-  ( KnownNat from
-  , KnownNat to
-  , Num a
-  , Ord a
-  , Integral a
-  ) => Arbitrary (Range from to a) where
-  arbitrary = Range . fromInteger <$> choose (natVal $ Proxy @from, natVal $ Proxy @to)
-  shrink (Range x) = Range <$> shrunk
-    where
-      shrunk =
-        [ x'
-        | x' <- shrinkIntegral x
-        , x >= fromInteger (natVal $ Proxy @from)
-        , x <= fromInteger (natVal $ Proxy @to)
-        ]
-```
-
-Then the corpus. Just like the `Range` it's a `newtype` with a phantom
-variable, providing the input for the random generation. There's an extra
-typeclass involved to act as a typelevel function.
-
-``` haskell
-newtype Corpus (corpus :: [Symbol]) a = Corpus a
-
-class FromCorpus (corpus :: [Symbol]) where
-  fromCorpus :: [String]
-
-instance FromCorpus '[] where
-  fromCorpus = []
-
-instance (KnownSymbol x, FromCorpus xs) => FromCorpus (x ': xs) where
-  fromCorpus = symbolVal (Proxy @x) : fromCorpus @xs
-
-instance (FromCorpus corpus, IsString x) => Arbitrary (Corpus corpus x) where
-  arbitrary = Corpus . fromString <$> elements (fromCorpus @corpus)
-```
-
-With these instances out of the way, we can redo our original test with
-automatic instances.
-
-``` haskell
-import GHC.Generics (Generic)
-
-import Data.Text (Text)
-import qualified Data.Aeson as A
-
-import Test.QuickCheck
-
-import Isomorphic
-
-data Person
-  = Person { name :: Text
-           , age :: Int
-           }
-  deriving stock (Show, Eq, Generic)
-  deriving anyclass (A.ToJSON, A.FromJSON)
-  deriving Arbitrary via ((Corpus Simpsons Text, Range 1 99 Int) `Isomorphic` Person)
-
-prop_encoding :: Person -> Property
-prop_encoding p = pure p === A.eitherDecode (A.encode p)
-```

rauhala.info/projects/2021-01-21-bidirectional.md

@@ -1,37 +0,0 @@
----
-title: bidirectional
-github: https://github.com/MasseR/bidirectional
-issues: https://github.com/MasseR/bidirectional/issues
-badge: https://github.com/MasseR/bidirectional/workflows/Test/badge.svg
----
-
-Bidirectional serialization based on Lysxia's post on [Monadic profunctors for bidirectional programming](https://blog.poisson.chat/posts/2017-01-01-monadic-profunctors.html).
-
-
-Let's assume we have a parser like the following
-
-``` haskell
-int :: Parser (ReaderT String Maybe) (Writer [Int]) Int Int
-int = parser (ReaderT readMaybe) (\x -> x <$ tell [show x])
-```
-
-Then you can use the parser for parsing:
-
-```
-> runReaderT (decode int) "3"
-Just 3
-```
-
-Or for encoding:
-
-```
-> execWriter (encode int 3)
-["3"]
-```
-
-Or combine both of them
-
-```
-> runReaderT (decode int) $ head $ execWriter $ encode int 3
-Just 3
-```

rauhala.info/projects/2021-01-21-phrase.md

@@ -1,23 +0,0 @@
----
-title: phrase
-github: https://github.com/MasseR/phrase
-issues: https://github.com/MasseR/phrase/issues
-badge: https://github.com/MasseR/phrase/workflows/Run nix build/badge.svg
----
-
-This project is a command line tool for generating password phrases using the
-[diceware method](https://diceware.dmuth.org/). The passwords are stored in a
-folder structure that is compatible with the
-[pass](https://www.passwordstore.org/) password store manager.
-
-
-
-```
-$ phrase asd
-inlet area crux
-
-$ pass show asd
-inlet area crux
-
-$ file ~/.password-store/asd.gpg
-```

rauhala.info/projects/2021-01-21-zettelkast.md

@@ -1,17 +0,0 @@
----
-title: zettelkast
-github: https://github.com/MasseR/zettelkast
-issues: https://github.com/MasseR/zettelkast/issues
-badge: https://github.com/MasseR/zettelkast/workflows/Test/badge.svg
----
-
-Command-line tool for managing zettelkast documents. The tool primarily focuses
-on providing unique ids and showing a graph of document connections. It tries
-to be as unintrusive as possible.
-
-```
-$ zettelkast help
-$ zettelkast new
-$ zettelkast list
-$ zettelkast open <id>
-```

rauhala.info/shell.nix

@@ -1,10 +0,0 @@
-with (import <nixpkgs> {});
-
-let site = haskellPackages.callPackage ../site {};
-
-in
-
-mkShell {
-  buildInputs = [ site ];
-}
-

rauhala.info/templates/post-list.html

@@ -1,7 +0,0 @@
-<ul>
-    $for(items)$
-        <li>
-            <a href="$url$">$title$</a> - $date$
-        </li>
-    $endfor$
-</ul>

rauhala.info/templates/post.html

@@ -1,8 +0,0 @@
-<article>
-  <section class="header">
-    Posted on $date$
-  </section>
-  <section>
-    $body$
-  </section>
-</article>

rauhala.info/templates/project-list.html

@@ -1,11 +0,0 @@
-<ul>
-    $for(items)$
-        <li>
-          <div class="projectlist">
-            <a href="$url$">$title$</a>
-            <a href="$github$">$if(badge)$<img src="$badge$" />$else$ Github $endif$</a>
-          </div>
-        </li>
-    $endfor$
-</ul>
-

rauhala.info/templates/project.html

@@ -1,12 +0,0 @@
-<div class="sidebar-container">
-  <article>
-    <section>
-      $body$
-    </section>
-  </article>
-  <div class="sidebar">
-    <a href="$github$">Github</a>
-    <a href="$issues$">Issues</a>
-    $if(badge)$<img src="$badge$" />$endif$
-  </div>
-</div>

rauhala.info/well-known/keybase.txt

@@ -1,111 +0,0 @@
-==================================================================
-https://keybase.io/masser
---------------------------------------------------------------------
-
-I hereby claim:
-
-  * I am an admin of https://masser.keybase.pub
-  * I am masser (https://keybase.io/masser) on keybase.
-  * I have a public key ASD7WFMicMJhoArgnvPuR7Dc92WStIUWWXcyngnsTE_IaQo
-
-To do so, I am signing this object:
-
-{
-  "body": {
-    "key": {
-      "eldest_kid": "01202eb5d3b8d2fc63e4bc9c6edefb3a38f1043dfdc44a7268393951fe0ea5214cf00a",
-      "host": "keybase.io",
-      "kid": "0120fb58532270c261a00ae09ef3ee47b0dcf76592b485165977329e09ec4c4fc8690a",
-      "uid": "b01557931e13482e9e646593a64e9119",
-      "username": "masser"
-    },
-    "merkle_root": {
-      "ctime": 1580587604,
-      "hash": "890506579950548b2aa6fd0f35850b9fdb1d064786714f18515d0e3089cdc2458c5fe847d40ca71c2e021ca11677de055ac97804c53d1bef89432f88b57599d4",
-      "hash_meta": "104419595abc52918530f85495417faf35c7a5a608d6730bf53152dfa7288970",
-      "seqno": 14451686
-    },
-    "service": {
-      "entropy": "QIvRp0qNOIZFplyzXERiwp75",
-      "hostname": "masser.keybase.pub",
-      "protocol": "https:"
-    },
-    "type": "web_service_binding",
-    "version": 2
-  },
-  "client": {
-    "name": "keybase.io go client",
-    "version": "4.3.1"
-  },
-  "ctime": 1580587641,
-  "expire_in": 504576000,
-  "prev": "c99f66ba0bfa7ff6be736e24691c8007b0db41b6036b7f1e5f9335ab7f3550f4",
-  "seqno": 34,
-  "tag": "signature"
-}
-
-which yields the signature:
-
-hKRib2R5hqhkZXRhY2hlZMOpaGFzaF90eXBlCqNrZXnEIwEg+1hTInDCYaAK4J7z7kew3PdlkrSFFll3Mp4J7ExPyGkKp3BheWxvYWTESpcCIsQgyZ9mugv6f/a+c24kaRyAB7DbQbYDa38eX5M1q381UPTEIH8FtgpzXt/JJxrhAYknW7xL4+K57JBJnbhFpXWAfEH5AgHCo3NpZ8RApEnmCcZApdOTf+XAHRbbgoysAZHfyTHamWC/BEHKuqEf/BlUFSxo6ASa/YC+Y2sMJfW2iRFlP2bs822TyJTBA6hzaWdfdHlwZSCkaGFzaIKkdHlwZQildmFsdWXEINm3yJdAbmbGJd03EnpuKVh2JzkI8WkngbWbAxbbR0MMo3RhZ80CAqd2ZXJzaW9uAQ==
-
-And finally, I am proving ownership of this host by posting or
-appending to this document.
-
-View my publicly-auditable identity here: https://keybase.io/masser
-
-===================================================================
-https://keybase.io/masser
---------------------------------------------------------------------
-
-I hereby claim:
-
-  * I am an admin of https://rauhala.info
-  * I am masser (https://keybase.io/masser) on keybase.
-  * I have a public key ASD7WFMicMJhoArgnvPuR7Dc92WStIUWWXcyngnsTE_IaQo
-
-To do so, I am signing this object:
-
-{
-  "body": {
-    "key": {
-      "eldest_kid": "01202eb5d3b8d2fc63e4bc9c6edefb3a38f1043dfdc44a7268393951fe0ea5214cf00a",
-      "host": "keybase.io",
-      "kid": "0120fb58532270c261a00ae09ef3ee47b0dcf76592b485165977329e09ec4c4fc8690a",
-      "uid": "b01557931e13482e9e646593a64e9119",
-      "username": "masser"
-    },
-    "merkle_root": {
-      "ctime": 1580591326,
-      "hash": "2b1b8c5e3de98e3e80ec4b4c28270066744d5d0982c23e4c13ec97d9311e32996b0cc39ab07f51a2418f833d3f03c0219c7ebd8cdc9c99ac09d3f88d0b6129d1",
-      "hash_meta": "0e85fd563e1159d6c5b32f5c424d4c97101c3a11346a0dad77bdbf043ca4f287",
-      "seqno": 14452336
-    },
-    "service": {
-      "entropy": "7UNm+4us1fZE3TRssgGatBC2",
-      "hostname": "rauhala.info",
-      "protocol": "https:"
-    },
-    "type": "web_service_binding",
-    "version": 2
-  },
-  "client": {
-    "name": "keybase.io go client",
-    "version": "4.3.1"
-  },
-  "ctime": 1580591336,
-  "expire_in": 504576000,
-  "prev": "ed5dd9b2571746743f37dd55f59235bd46d7f7de01a2bafba14b9c0929751aee",
-  "seqno": 35,
-  "tag": "signature"
-}
-
-which yields the signature:
-
-hKRib2R5hqhkZXRhY2hlZMOpaGFzaF90eXBlCqNrZXnEIwEg+1hTInDCYaAK4J7z7kew3PdlkrSFFll3Mp4J7ExPyGkKp3BheWxvYWTESpcCI8Qg7V3ZslcXRnQ/N91V9ZI1vUbX994Borr7oUucCSl1Gu7EIJld9Pai+YxhSvZUIA+ZyzwEEbpy98uEqp975YKAEdz9AgHCo3NpZ8RAtksa9w0UQrwg8dPGEzahht+hY4QKQthbZ/yWuOSmfA3C5E1/KorbIEi+tcy5lkSJqNbZRSqBgpl9zerYw5bbAahzaWdfdHlwZSCkaGFzaIKkdHlwZQildmFsdWXEICy29OKKJc5LUELFLo8kW15N3zex43ussKLFeGLhTDapo3RhZ80CAqd2ZXJzaW9uAQ==
-
-And finally, I am proving ownership of this host by posting or
-appending to this document.
-
-View my publicly-auditable identity here: https://keybase.io/masser
-
-===================================================================================================================================

release.nix

@@ -0,0 +1,21 @@
+{ pkgs ? import <nixpkgs> {} }:
+
+let
+  haskellPackages = pkgs.haskellPackages;
+  site = pkgs.callPackage ./default.nix {};
+  shell = pkgs.buildEnv {
+    name = "site-shell";
+    paths = [];
+    buildInputs = [
+      haskellPackages.ghcid
+      haskellPackages.hasktags
+      (haskellPackages.ghcWithHoogle (h: site.buildInputs ++ site.propagatedBuildInputs))
+    ];
+  };
+
+in
+
+{
+  site = site;
+  shell = shell;
+}

site.cabal

@@ -9,10 +9,8 @@ maintainer:         mats.rauhala@iki.fi
 
 executable site
   main-is:          site.hs
-  hs-source-dirs:   app
   build-depends:    base == 4.*
                   , hakyll >= 4.10
                   , time
-                  , filepath
   ghc-options:      -threaded
   default-language: Haskell2010

site.hs

@@ -0,0 +1,71 @@
+{-# LANGUAGE OverloadedStrings #-}
+import           Data.List   (sortOn)
+import           Data.Time   (defaultTimeLocale, formatTime)
+import           Hakyll
+
+
+--------------------------------------------------------------------------------
+main :: IO ()
+main = hakyllWith defaultConfiguration{ deployCommand = "ipfs add -Q -r _site" } $do
+    match "images/*" $ do
+        route   idRoute
+        compile copyFileCompiler
+
+    match "resources/*" $ do
+        route   idRoute
+        compile copyFileCompiler
+
+    match "css/*" $ do
+        route   idRoute
+        compile compressCssCompiler
+
+    match "js/*" $ do
+        route   idRoute
+        compile compressCssCompiler
+
+    match (fromList ["index.markdown", "contact.markdown"]) $ do
+        route   $ setExtension "html"
+        compile $ pandocCompiler
+            >>= loadAndApplyTemplate "templates/default.html" defaultContext
+            >>= relativizeUrls
+
+    match "posts/*" $ do
+      route $ setExtension "html"
+      compile $ pandocCompiler
+        >>= loadAndApplyTemplate "templates/post.html"    postCtx
+        >>= loadAndApplyTemplate "templates/default.html" postCtx
+        >>= relativizeUrls
+
+    create ["posts.html"] $ do
+        route idRoute
+        compile $ do
+            posts <- modFirst =<< loadAll "posts/*"
+            let archiveCtx =
+                    listField "posts" postCtx (return posts) <>
+                    constField "title" "Posts"               <>
+                    defaultContext
+
+            makeItem ""
+                >>= loadAndApplyTemplate "templates/guides.html" archiveCtx
+                >>= loadAndApplyTemplate "templates/default.html" archiveCtx
+                >>= relativizeUrls
+
+
+    match "templates/*" $ compile templateBodyCompiler
+
+modFirst :: [Item a] -> Compiler [Item a]
+modFirst = fmap reverse . modified
+  where
+    modified = sortByM (getItemModificationTime . itemIdentifier)
+    sortByM f xs = map fst . sortOn snd <$> mapM (\x -> (,) x <$> f x) xs
+
+--------------------------------------------------------------------------------
+postCtx :: Context String
+postCtx =
+    dateField "date" "%B %e, %Y" <>
+    modifiedField "modified" "%B %e, %Y" <>
+    defaultContext
+  where
+    modifiedField key format = field key $ \i -> do
+      time <- getItemModificationTime $ itemIdentifier i
+      return $ formatTime defaultTimeLocale format time

site/.envrc

@@ -1 +0,0 @@
-use nix

site/.stylish-haskell.yaml

@@ -1,249 +0,0 @@
-# stylish-haskell configuration file
-# ==================================
-
-# The stylish-haskell tool is mainly configured by specifying steps. These steps
-# are a list, so they have an order, and one specific step may appear more than
-# once (if needed). Each file is processed by these steps in the given order.
-steps:
-  # Convert some ASCII sequences to their Unicode equivalents. This is disabled
-  # by default.
-  # - unicode_syntax:
-  #     # In order to make this work, we also need to insert the UnicodeSyntax
-  #     # language pragma. If this flag is set to true, we insert it when it's
-  #     # not already present. You may want to disable it if you configure
-  #     # language extensions using some other method than pragmas. Default:
-  #     # true.
-  #     add_language_pragma: true
-
-  # Align the right hand side of some elements.  This is quite conservative
-  # and only applies to statements where each element occupies a single
-  # line.
-  - simple_align:
-      cases: false
-      top_level_patterns: false
-      records: false
-
-  # Import cleanup
-  - imports:
-      # There are different ways we can align names and lists.
-      #
-      # - global: Align the import names and import list throughout the entire
-      #   file.
-      #
-      # - file: Like global, but don't add padding when there are no qualified
-      #   imports in the file.
-      #
-      # - group: Only align the imports per group (a group is formed by adjacent
-      #   import lines).
-      #
-      # - none: Do not perform any alignment.
-      #
-      # Default: global.
-      align: none
-
-      # The following options affect only import list alignment.
-      #
-      # List align has following options:
-      #
-      # - after_alias: Import list is aligned with end of import including
-      #   'as' and 'hiding' keywords.
-      #
-      #   > import qualified Data.List      as List (concat, foldl, foldr, head,
-      #   >                                          init, last, length)
-      #
-      # - with_alias: Import list is aligned with start of alias or hiding.
-      #
-      #   > import qualified Data.List      as List (concat, foldl, foldr, head,
-      #   >                                 init, last, length)
-      #
-      # - new_line: Import list starts always on new line.
-      #
-      #   > import qualified Data.List      as List
-      #   >     (concat, foldl, foldr, head, init, last, length)
-      #
-      # Default: after_alias
-      list_align: new_line
-
-      # Right-pad the module names to align imports in a group:
-      #
-      # - true: a little more readable
-      #
-      #   > import qualified Data.List       as List (concat, foldl, foldr,
-      #   >                                           init, last, length)
-      #   > import qualified Data.List.Extra as List (concat, foldl, foldr,
-      #   >                                           init, last, length)
-      #
-      # - false: diff-safe
-      #
-      #   > import qualified Data.List as List (concat, foldl, foldr, init,
-      #   >                                     last, length)
-      #   > import qualified Data.List.Extra as List (concat, foldl, foldr,
-      #   >                                           init, last, length)
-      #
-      # Default: true
-      pad_module_names: false
-
-      # Long list align style takes effect when import is too long. This is
-      # determined by 'columns' setting.
-      #
-      # - inline: This option will put as much specs on same line as possible.
-      #
-      # - new_line: Import list will start on new line.
-      #
-      # - new_line_multiline: Import list will start on new line when it's
-      #   short enough to fit to single line. Otherwise it'll be multiline.
-      #
-      # - multiline: One line per import list entry.
-      #   Type with constructor list acts like single import.
-      #
-      #   > import qualified Data.Map as M
-      #   >     ( empty
-      #   >     , singleton
-      #   >     , ...
-      #   >     , delete
-      #   >     )
-      #
-      # Default: inline
-      long_list_align: new_line_multiline
-
-      # Align empty list (importing instances)
-      #
-      # Empty list align has following options
-      #
-      # - inherit: inherit list_align setting
-      #
-      # - right_after: () is right after the module name:
-      #
-      #   > import Vector.Instances ()
-      #
-      # Default: inherit
-      empty_list_align: inherit
-
-      # List padding determines indentation of import list on lines after import.
-      # This option affects 'long_list_align'.
-      #
-      # - <integer>: constant value
-      #
-      # - module_name: align under start of module name.
-      #   Useful for 'file' and 'group' align settings.
-      list_padding: 7
-
-      # Separate lists option affects formatting of import list for type
-      # or class. The only difference is single space between type and list
-      # of constructors, selectors and class functions.
-      #
-      # - true: There is single space between Foldable type and list of it's
-      #   functions.
-      #
-      #   > import Data.Foldable (Foldable (fold, foldl, foldMap))
-      #
-      # - false: There is no space between Foldable type and list of it's
-      #   functions.
-      #
-      #   > import Data.Foldable (Foldable(fold, foldl, foldMap))
-      #
-      # Default: true
-      separate_lists: false
-
-      # Space surround option affects formatting of import lists on a single
-      # line. The only difference is single space after the initial
-      # parenthesis and a single space before the terminal parenthesis.
-      #
-      # - true: There is single space associated with the enclosing
-      #   parenthesis.
-      #
-      #   > import Data.Foo ( foo )
-      #
-      # - false: There is no space associated with the enclosing parenthesis
-      #
-      #   > import Data.Foo (foo)
-      #
-      # Default: false
-      space_surround: false
-
-  # Language pragmas
-  - language_pragmas:
-      # We can generate different styles of language pragma lists.
-      #
-      # - vertical: Vertical-spaced language pragmas, one per line.
-      #
-      # - compact: A more compact style.
-      #
-      # - compact_line: Similar to compact, but wrap each line with
-      #   `{-#LANGUAGE #-}'.
-      #
-      # Default: vertical.
-      style: vertical
-
-      # Align affects alignment of closing pragma brackets.
-      #
-      # - true: Brackets are aligned in same column.
-      #
-      # - false: Brackets are not aligned together. There is only one space
-      #   between actual import and closing bracket.
-      #
-      # Default: true
-      align: false
-
-      # stylish-haskell can detect redundancy of some language pragmas. If this
-      # is set to true, it will remove those redundant pragmas. Default: true.
-      remove_redundant: true
-
-  # Replace tabs by spaces. This is disabled by default.
-  # - tabs:
-  #     # Number of spaces to use for each tab. Default: 8, as specified by the
-  #     # Haskell report.
-  #     spaces: 8
-
-  # Remove trailing whitespace
-  - trailing_whitespace: {}
-
-  # Squash multiple spaces between the left and right hand sides of some
-  # elements into single spaces. Basically, this undoes the effect of
-  # simple_align but is a bit less conservative.
-  # - squash: {}
-
-# A common setting is the number of columns (parts of) code will be wrapped
-# to. Different steps take this into account. Default: 80.
-columns: 80
-
-# By default, line endings are converted according to the OS. You can override
-# preferred format here.
-#
-# - native: Native newline format. CRLF on Windows, LF on other OSes.
-#
-# - lf: Convert to LF ("\n").
-#
-# - crlf: Convert to CRLF ("\r\n").
-#
-# Default: native.
-newline: native
-
-# Sometimes, language extensions are specified in a cabal file or from the
-# command line instead of using language pragmas in the file. stylish-haskell
-# needs to be aware of these, so it can parse the file correctly.
-#
-# No language extensions are enabled by default.
-language_extensions:
-  - RecordWildCards
-  - TemplateHaskell
-  - QuasiQuotes
-  - LambdaCase
-  - TupleSections
-  - MultiParamTypeClasses
-  - TypeApplications
-  - DataKinds
-  - TypeFamilies
-  - FlexibleContexts
-  - NamedFieldPuns
-  - MultiWayIf
-  - PolyKinds
-  - ExplicitForAll
-  - FunctionalDependencies
-  - ExplicitNamespaces
-  - ScopedTypeVariables
-  - ExistentialQuantification
-  - InstanceSigs
-  - GeneralizedNewtypeDeriving
-  - BangPatterns
-

site/app/site.hs

@@ -1,107 +0,0 @@
-{-# LANGUAGE OverloadedStrings #-}
-{-# LANGUAGE RecordWildCards #-}
-{-# LANGUAGE StrictData #-}
-import Hakyll
-
-import Data.List
-       (isPrefixOf, isSuffixOf)
-
-import System.FilePath
-       (takeFileName)
-
-
---------------------------------------------------------------------------------
-main :: IO ()
-main = hakyllWith defaultConfiguration{ignoreFile = ignore} $ do
-  match "well-known/*" $ do
-    route (customRoute (prepend '.'. toFilePath))
-    compile copyFileCompiler
-
-  match "images/*" $ do
-    route   idRoute
-    compile copyFileCompiler
-
-  match "resources/*" $ do
-    route   idRoute
-    compile copyFileCompiler
-
-  match "css/*" $ do
-    route   idRoute
-    compile compressCssCompiler
-
-  match "js/*" $ do
-    route   idRoute
-    compile compressCssCompiler
-
-  match "posts/*" $ do
-    route $ setExtension "html"
-    compile $ pandocCompiler
-      >>= loadAndApplyTemplate "templates/post.html" postContext
-      >>= loadAndApplyTemplate "templates/default.html" defaultContext
-      >>= relativizeUrls
-
-  match "projects/*" $ do
-    route $ setExtension "html"
-    compile $ pandocCompiler
-      >>= loadAndApplyTemplate "templates/project.html" postContext
-      >>= loadAndApplyTemplate "templates/default.html" defaultContext
-      >>= relativizeUrls
-
-
-  match (fromList ["index.markdown", "contact.markdown"]) $ do
-    route   $ setExtension "html"
-    compile $ pandocCompiler
-      >>= loadAndApplyTemplate "templates/default.html" defaultContext
-      >>= relativizeUrls
-
-  archive $ Archive { output = "posts.html"
-                    , input = "posts/*"
-                    , title = "Posts"
-                    , template = "templates/post-list.html"
-                    , context = postContext
-                    }
-
-  archive $ Archive { output = "projects.html"
-                    , input = "projects/*"
-                    , title = "Projects"
-                    , template = "templates/project-list.html"
-                    , context = postContext
-                    }
-
-  match "templates/*" $ compile templateBodyCompiler
-  where
-
-    postContext :: Context String
-    postContext = dateField "date" "%B %e, %Y" <> defaultContext
-    ignore :: FilePath -> Bool
-    ignore path = any ($ takeFileName path)
-      [ ("." `isPrefixOf`)
-      , ("#" `isPrefixOf`)
-      , ("~" `isSuffixOf`)
-      , (".swp" `isSuffixOf`)
-      ]
-
-data Archive
-  = Archive { output :: Identifier
-            , input :: Pattern
-            , title :: String
-            , template :: Identifier
-            , context :: Context String
-            }
-
-archive :: Archive -> Rules ()
-archive Archive{..} = create [output] $ do
-  route idRoute
-  compile $ do
-    let itemsContext =
-             listField "items" context items
-          <> constField "title" title
-          <> defaultContext
-        items = recentFirst =<< loadAll input
-    makeItem ""
-      >>= loadAndApplyTemplate template itemsContext
-      >>= loadAndApplyTemplate "templates/default.html" itemsContext
-      >>= relativizeUrls
-
-prepend :: a -> [a] -> [a]
-prepend = (:)

site/default.nix

@@ -1,10 +0,0 @@
-{ mkDerivation, base, filepath, hakyll, stdenv, time }:
-mkDerivation {
-  pname = "site";
-  version = "0.1.0.0";
-  src = ./.;
-  isLibrary = false;
-  isExecutable = true;
-  executableHaskellDepends = [ base filepath hakyll time ];
-  license = stdenv.lib.licenses.bsd3;
-}

site/shell.nix

@@ -1,16 +0,0 @@
-with (import <nixpkgs> {});
-
-let site = haskellPackages.callPackage ./. {};
-
-in
-
-mkShell {
-  buildInputs = [
-    ghcid
-    stylish-haskell
-    haskellPackages.cabal-install
-    hlint
-    (haskellPackages.ghcWithPackages (_: site.buildInputs ++ site.propagatedBuildInputs))
-  ];
-}
-

templates/default.html

@@ -10,30 +10,30 @@
     </head>
     <body>
         <header>
-            <!-- <div class="logo"> -->
+            <div class="logo">
-            <!--     <a href="/">rauhala.info</a> -->
+                <a href="/">rauhala.info</a>
-            <!-- </div> -->
+            </div>
             <nav>
                 <!-- Git logo from https://git-scm.com/downloads/logos -->
                 <!-- Logo by Jason Long -->
-                <a href="/">Home</a>
-                <a href="/posts.html">Posts</a>
-                <a href="/projects.html">Projects</a>
                 <a href="https://git.rauhala.info"><img src="/images/git_16.png" alt="git" /></a>
                 <a href="/contact.html">Contact</a>
+                <a href="/posts.html">Posts</a>
             </nav>
         </header>
 
         <main role="main">
-          <div>
             <h1>$title$</h1>
             $body$
-          </div>
         </main>
 
         <footer>
             Site proudly generated by
             <a href="http://jaspervdj.be/hakyll">Hakyll</a>
+            <span id="ipfs">and found on IPFS as <em></em></ipfs>
         </footer>
     </body>
+    <script type="application/javascript" src="/js/jquery-3.3.1.min.js"></script>
+    <script type="application/javascript" src="/js/api.js"></script>
+    <script type="application/javascript" src="/js/app.js"></script>
 </html>

templates/guides.html

@@ -0,0 +1,3 @@
+Me writing out interesting ideas and experiments.
+
+$partial("templates/post-list.html")$

templates/post-list.html

@@ -0,0 +1,7 @@
+<ul>
+    $for(posts)$
+        <li>
+            <a href="$url$">$title$</a> - $modified$
+        </li>
+    $endfor$
+</ul>

templates/post.html

@@ -0,0 +1,11 @@
+<article>
+    <section class="header">
+        Posted on $date$, modified on $modified$
+        $if(author)$
+            by $author$
+        $endif$
+    </section>
+    <section>
+        $body$
+    </section>
+</article>