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2 Commits
configurin
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08ad6fb469
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@ -111,7 +111,7 @@ article .header {
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@media (min-width: 640px) {
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@media (min-width: 640px) {
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body {
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body {
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width: 85rem;
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width: 60rem;
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margin: 0 auto;
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margin: 0 auto;
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padding: 0;
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padding: 0;
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}
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}
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@ -1,18 +1,6 @@
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/* Generated by pandoc. */
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/* Generated by pandoc. */
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table.sourceCode, tr.sourceCode, td.lineNumbers, td.sourceCode, table.sourceCode pre.sourceCode
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table.sourceCode, tr.sourceCode, td.lineNumbers, td.sourceCode, table.sourceCode pre
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{
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{ margin: 0; padding: 0; border: 0; vertical-align: baseline; border: none; }
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margin: 0;
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padding: 0;
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/* border: 0; */
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vertical-align: baseline;
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}
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pre.sourceCode
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{
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border: 1px solid #ccc;
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background-color: rgb(238,238,255);
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padding: 10px;
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overflow: auto;
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}
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td.lineNumbers { border-right: 1px solid #AAAAAA; text-align: right; color: #AAAAAA; padding-right: 5px; padding-left: 5px; }
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td.lineNumbers { border-right: 1px solid #AAAAAA; text-align: right; color: #AAAAAA; padding-right: 5px; padding-left: 5px; }
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td.sourceCode { padding-left: 5px; }
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td.sourceCode { padding-left: 5px; }
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.sourceCode span.kw { color: #007020; font-weight: bold; }
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.sourceCode span.kw { color: #007020; font-weight: bold; }
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22
js/api.js
22
js/api.js
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var getApiIpfsCurrent = function(onSuccess, onError) {
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var xhr = new XMLHttpRequest();
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xhr.open('GET', '/api/ipfs/current', true);
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xhr.setRequestHeader('Accept', 'application/json');
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xhr.onreadystatechange = function () {
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var res = null;
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if (xhr.readyState === 4) {
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if (xhr.status === 204 || xhr.status === 205) {
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onSuccess();
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} else if (xhr.status >= 200 && xhr.status < 300) {
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try { res = JSON.parse(xhr.responseText); } catch (e) { onError(e); }
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if (res) onSuccess(res);
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} else {
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try { res = JSON.parse(xhr.responseText); } catch (e) { onError(e); }
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if (res) onError(res);
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}
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}
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};
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xhr.send(null);
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};
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10
js/app.js
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js/app.js
@ -1,10 +0,0 @@
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$(document).ready(function() {
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var success = function(x) {
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$("#ipfs > em").html(x);
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};
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var error = function(x) {
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$("#ipfs").hide();
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console.log("ipfs hash not found: " + x);
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};
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getApiIpfsCurrent(success, error);
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});
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2
js/jquery-3.3.1.min.js
vendored
2
js/jquery-3.3.1.min.js
vendored
File diff suppressed because one or more lines are too long
7
nixpkgs.json
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7
nixpkgs.json
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@ -0,0 +1,7 @@
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{
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"url": "https://github.com/NixOS/nixpkgs",
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"rev": "7e1f60dfbba67b975d1a77d710a6f1437fd9709c",
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"date": "2020-02-01T09:20:37-05:00",
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"sha256": "0vk55459iljr5dzwnr5661l44b0wdc15952lk2rjcmxr1620yr5v",
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"fetchSubmodules": false
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}
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@ -1,78 +0,0 @@
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---
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title: Extensible configuration Pt. 1
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date: 2019-03-27
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---
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This is the first part of a series where I'm going through how to make
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extensible configuration. There is nothing groundbreaking or new in this
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series, it's just me going through different implementations and trying to
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understand them.
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The source material for this post is [the fixed point implementation](https://github.com/NixOS/nixpkgs/blob/master/lib/fixed-points.nix) for nix.
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By extensible configuration, I'm talking about nix style extensible
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configuration, like overlays, overrides and extensions. Let's see an example of
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an extensible configuration.
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``` nix
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{ haskellPackages, fetchFromGitHub }:
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let
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purescript = fetchFromGitHub {
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owner = "purescript";
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repo = "purescript";
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rev = "2cb4a6496052db726e099539be682b87585af494";
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sha256 = "1v4gs08xnqgym6jj3drkzbic7ln3hfmflpbpij3qzwxsmqd2abr7";
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}
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hp = haskellPackages.extend (self: super: {
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purescript = super.callCabal2nix "purescript" purescript {};
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});
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in
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hp.purescript;
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```
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On a high level we are augmenting the `haskellPackages` attrset by replacing
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the existing purescript package with a different one. The extension is a
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function that takes two arguments, `self` and `super`. `super` is the original
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non-lazy value and `self` is the lazy value that corresponds to the value at
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end.
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The first step on this journey is done by getting to know `fix`. Fix is
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described being the least fixed point of a function. In practice it's a
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function allowing declaring recursive functions without explicit recursion.
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``` nix
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fix = f: let x = f x; in x
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```
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With fix you can have access to the lazy `self` value. It's value is whatever
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would have been computed in the end. As it is lazy, it is possible to end up in
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a recursive loop if there is a cyclic dependency.
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``` nix
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let recursive = fix (self: {
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foo = 3;
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bar = self.foo + 1;
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});
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infinite = fix (self: {
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foo = self.bar + 1;
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bar = self.foo + 1;
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});
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```
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You can try those yourself. The first version is fine and returns an attrset
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like you would expect. The second one has a cyclic dependency and nix helpfully
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errors out.
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The next step is making a function that has access to the unmodified original
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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.
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``` nix
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extends = f: rattrs: self: let super = rattrs self; in super // f self super
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```
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- https://elvishjerricco.github.io/2017/04/01/nix-style-configs-in-haskell.html
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- https://github.com/NixOS/nixpkgs/blob/master/lib/fixed-points.nix
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- https://chshersh.github.io/posts/2019-03-25-comonadic-builders
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11
release.nix
11
release.nix
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{ pkgs ? import <nixpkgs> {} }:
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let
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pin = builtins.fromJSON (builtins.readFile ./nixpkgs.json);
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pinnedPkgs = with pin; import (builtins.fetchTarball {
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url = "https://github.com/NixOS/nixpkgs/archive/${rev}.tar.gz";
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inherit sha256;
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}) {};
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in
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{ pkgs ? pinnedPkgs }:
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let
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let
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haskellPackages = pkgs.haskellPackages;
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haskellPackages = pkgs.haskellPackages;
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34
site.hs
34
site.hs
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--------------------------------------------------------------------------------
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE OverloadedStrings #-}
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import Data.List (sortOn)
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import Data.Monoid (mappend)
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import Data.Time (defaultTimeLocale, formatTime)
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import Hakyll
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import Hakyll
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import Data.List (sortBy, sortOn)
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import Data.Time (formatTime, defaultTimeLocale)
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--------------------------------------------------------------------------------
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--------------------------------------------------------------------------------
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@ -29,20 +31,34 @@ main = hakyllWith defaultConfiguration{ deployCommand = "ipfs add -Q -r _site" }
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>>= loadAndApplyTemplate "templates/default.html" defaultContext
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>>= loadAndApplyTemplate "templates/default.html" defaultContext
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>>= relativizeUrls
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>>= relativizeUrls
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match "posts/*" $ do
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match "posts/incomplete/*" $ do
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route $ setExtension "html"
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route $ setExtension "html"
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compile $ pandocCompiler
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compile $ pandocCompiler
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>>= loadAndApplyTemplate "templates/post.html" postCtx
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>>= loadAndApplyTemplate "templates/post.html" postCtx
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>>= loadAndApplyTemplate "templates/default.html" postCtx
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>>= loadAndApplyTemplate "templates/default.html" postCtx
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>>= relativizeUrls
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>>= relativizeUrls
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create ["posts.html"] $ do
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match "posts/guides/*" $ do
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route $ setExtension "html"
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compile $ pandocCompiler
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>>= loadAndApplyTemplate "templates/post.html" postCtx
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>>= loadAndApplyTemplate "templates/default.html" postCtx
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>>= relativizeUrls
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match "posts/brainstorming/*" $ do
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route $ setExtension "html"
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compile $ pandocCompiler
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>>= loadAndApplyTemplate "templates/post.html" postCtx
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>>= loadAndApplyTemplate "templates/default.html" postCtx
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>>= relativizeUrls
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create ["guides.html"] $ do
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route idRoute
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route idRoute
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compile $ do
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compile $ do
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posts <- modFirst =<< loadAll "posts/*"
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posts <- modFirst =<< loadAll "posts/guides/*"
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let archiveCtx =
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let archiveCtx =
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listField "posts" postCtx (return posts) <>
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listField "posts" postCtx (return posts) `mappend`
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constField "title" "Posts" <>
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constField "title" "Guides" `mappend`
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defaultContext
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defaultContext
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makeItem ""
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makeItem ""
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@ -62,8 +78,8 @@ modFirst = fmap reverse . modified
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--------------------------------------------------------------------------------
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--------------------------------------------------------------------------------
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postCtx :: Context String
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postCtx :: Context String
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postCtx =
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postCtx =
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dateField "date" "%B %e, %Y" <>
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dateField "date" "%B %e, %Y" `mappend`
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modifiedField "modified" "%B %e, %Y" <>
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modifiedField "modified" "%B %e, %Y" `mappend`
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defaultContext
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defaultContext
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where
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where
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modifiedField key format = field key $ \i -> do
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modifiedField key format = field key $ \i -> do
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@ -18,7 +18,6 @@
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<!-- Logo by Jason Long -->
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<!-- Logo by Jason Long -->
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<a href="https://git.rauhala.info"><img src="/images/git_16.png" alt="git" /></a>
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<a href="https://git.rauhala.info"><img src="/images/git_16.png" alt="git" /></a>
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<a href="/contact.html">Contact</a>
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<a href="/contact.html">Contact</a>
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<a href="/posts.html">Posts</a>
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</nav>
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</nav>
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</header>
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</header>
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@ -30,10 +29,6 @@
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<footer>
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<footer>
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Site proudly generated by
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Site proudly generated by
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<a href="http://jaspervdj.be/hakyll">Hakyll</a>
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<a href="http://jaspervdj.be/hakyll">Hakyll</a>
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<span id="ipfs">and found on IPFS as <em></em></ipfs>
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</footer>
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</footer>
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</body>
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</body>
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<script type="application/javascript" src="/js/jquery-3.3.1.min.js"></script>
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<script type="application/javascript" src="/js/api.js"></script>
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<script type="application/javascript" src="/js/app.js"></script>
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</html>
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</html>
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@ -1,3 +1,3 @@
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Me writing out interesting ideas and experiments.
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A list of small and big guides.
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$partial("templates/post-list.html")$
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$partial("templates/post-list.html")$
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Reference in New Issue
Block a user