README.md

   1 ---
   2 title: "Advent of Code 2018"
   3 output: html_document
   4 css: modest.css
   5 ---
   6 Code to solve the [Advent of Code](http://adventofcode.com/2018/) puzzles. This year, I'm using the puzzles to develop my skills in [Haskell](https://wiki.haskell.org/Haskell).
   7
   8 [Learn you a Haskell](http://learnyouahaskell.com/chapters), [Introduction to Haskell 98](https://www.haskell.org/tutorial/index.html), and [Hackage](https://hackage.haskell.org/) are good resources.
   9
  10 The [Stack documentation](https://docs.haskellstack.org/en/stable/README/) and [How I Start: Haskell](http://howistart.org/posts/haskell/1/) are good sources of using the tools.
  11
  12 # Toolchain
  13
  14 I'm using the basic Haskell Platform installation, togeher with `stack` to manage the packages and dependencies (install with
  15 ```
  16 $ sudo aptitude install haskell-platform haskell-stack
  17 ```
  18 ).
  19
  20 ## Creating the repository and project
  21 Create the repository as normal: create the project in Gitolite, clone it, and insert the `.gitignore` and `README.md` files.
  22
  23 There's just one package, with the code in sub-directories of the `src` directory. Each day will generate one (or more) entries in the `adventofcode17.cabal` file.
  24
  25 Create the basic `stack` project. This will create a new directory. Note that this new directory name can't have a hyphen-delimited word that's just digits, so the project will have to be `advent-of-code`
  26
  27 ```
  28 stack new advent-of-code --bare simple
  29 ```
  30
  31 Modify the `stack.yaml` file as needed, such as adding the `ghc-options` stanza.
  32
  33 ## Creating subsequent days
  34
  35 Each day lives in a separate directory within the `src` directory. It will also need it's own stanza in `advent-of-code.cabal`.
  36
  37 Compile with
  38 ```
  39 stack build
  40 ```
  41 or
  42 ```
  43 stack build advent01
  44 ```
  45
  46 Run with
  47 ```
  48 stack exec advent01
  49 ```
  50
  51 Run interactively with
  52 ```
  53 stack ghci advent-of-code:exe:advent01
  54 ```
  55
  56 To profile, use
  57 ```
  58 stack build --executable-profiling --library-profiling --ghc-options="-fprof-auto -rtsopts"
  59 ```
  60 then run with
  61 ```
  62 stack exec -- advent01 +RTS -p -hy
  63 ```
  64 Generate the profile graph with
  65 ```
  66 stack exec hp2ps advent01.hp
  67 ```
  68
  69 # Packages
  70
  71 Stack is using the [12.20-lts resolver](https://www.stackage.org/lts-12.20) for packages, so make sure you read the [correct documentation for the packages included in it](https://www.stackage.org/lts-12.20/docs).
  72
  73 When you use a new package, use
  74
  75 ```
  76 stack solver
  77 ```
  78 to see how the `stack.yaml` file needs to change, and
  79 ```
  80 stack solver --update-yaml
  81 ```
  82 to implement the changes.
  83
  84 # IHaskell
  85
  86 Install following the [IHaskell instructions](https://github.com/gibiansky/IHaskell).
  87
  88 Run it with
  89
  90 ```
  91 stack exec jupyter -- notebook
  92 ```
  93
  94 # Readme
  95
  96 Build this readme file wth
  97 ```
  98 pandoc -s README.md > README.html
  99 ```
 100
 101 (Using the [Modest style](https://github.com/markdowncss/modest).)