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 If you want to pass in additional RTS parameters, do it like this:
  52 ```
  53 stack exec -- advent01 +RTS -K0 -RTS
  54 ```
  55
  56 Run interactively with
  57 ```
  58 stack ghci advent-of-code:exe:advent01
  59 ```
  60
  61 To profile, use
  62 ```
  63 stack build --executable-profiling --library-profiling --ghc-options="-fprof-auto -rtsopts"
  64 ```
  65 then run with
  66 ```
  67 stack exec -- advent01 +RTS -p -hy
  68 ```
  69 Generate the profile graph with
  70 ```
  71 stack exec hp2ps advent01.hp
  72 ```
  73
  74 # Packages
  75
  76 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).
  77
  78 When you use a new package, use
  79
  80 ```
  81 stack solver
  82 ```
  83 to see how the `stack.yaml` file needs to change, and
  84 ```
  85 stack solver --update-yaml
  86 ```
  87 to implement the changes.
  88
  89 # IHaskell
  90
  91 Install following the [IHaskell instructions](https://github.com/gibiansky/IHaskell).
  92
  93 Run it with
  94
  95 ```
  96 stack exec jupyter -- notebook
  97 ```
  98
  99 # Readme
 100
 101 Build this readme file wth
 102 ```
 103 pandoc -s README.md > README.html
 104 ```
 105
 106 (Using the [Modest style](https://github.com/markdowncss/modest).)