crystal-lang/crystal

The Crystal programming language | http://crystal-lang.org | Fund Crystal's development: http://is.gd/X7PRtI | Docs: http://crystal-lang.org/docs/ | API: http://crystal-lang.org/api/

Ali Naqvi

@naqvis

Template engine doesn't force you to any specific set of usage

you can access any object as long as template engine has access to that object

For example

{%- for article in articles if article.published %}
  <div class="article">
    <h2><a href="{{ article.href|e }}">{{ article.title|e }}</a></h2>
    <p class="meta">written by <a href="{{ article.user.href|e
      }}">{{ article.user.username|e }}</a> on {{ article.pub_date|dateformat }}</p>
    <div class="text">{{ article.body }}</div>
  </div>
{%- endfor %}

Steve Hiemstra

@speg

speaking of templates, how do i make this work:
ECR.def_to_s "#{ECR_ROOT}/greeter.ecr"
Can't do that when calling a macro?

George Dietrich

@Blacksmoke16

does that not already work?

Steve Hiemstra

@speg

Kinda. I think it's constant above that is broken:

require "ecr"

ECR_ROOT = "./src/template/components/ecr"

class Greeter
  def initialize(@name : String)
  end

  ECR.def_to_s "#{ECR_ROOT}/greeter.ecr"
end

pp! ECR_ROOT
pp! Greeter.new("John").to_s # => "Greetings, John!\n"

Gives:

There was a problem expanding macro 'embed'

Code in macro 'def_to_s'

 2 | ECR.embed "#{ECR_ROOT}/greeter.ecr", "__io__"
     ^
Called macro defined in /usr/local/Cellar/crystal/1.0.0/src/ecr/macros.cr:69:3

 69 | macro embed(filename, io_name)

Which expanded to:

 > 1 | {{ run("ecr/process", "#{ECR_ROOT}/greeter.ecr", "__io__") }}
          ^--
Error: Error executing run (exit code: 1): ecr/process '"./src/template/components/ecr"/greeter.ecr' __io__


stderr:

    Error opening file with mode 'r': '\"./src/template/components/ecr\"/greeter.ecr': No such file or directory

George Dietrich

@Blacksmoke16

try and use __DIR__ instead of .

pretty sure . is the dir you're executing the file from while __DIR__ is the location of the file or something like that

oh but try doing ECR.def_to_s "#{ECR_ROOT.id}/greeter.ecr"

Steve Hiemstra

@speg

same thing, I had also tried using Dir.current with no luck

ooh, .id?

George Dietrich

@Blacksmoke16

yea

Steve Hiemstra

@speg

Success! 🙌🏼 Thank you sir. I haven't used macros yet, what's going on here?

George Dietrich

@Blacksmoke16

seems like its interpolating the string literal into the other string. Notice the path in the error has like \", instead of just like ecr/greeter.ecr

.id returns the raw value of the constant, e.g. ./src/template/components/ecr

maybe thats a bug as it's deff not what you'd expect :shrug:

Steve Hiemstra

@speg

hehe, neat. I was reading up on macros just last night but obvs need to learn some more. Thanks again!

didactic-drunk

@didactic-drunk

Why does crystal doc skip all my classes except for a monkey patched Slice in my project

George Dietrich

@Blacksmoke16

I'd guessCrypto already exists and is nodoc

didactic-drunk

@didactic-drunk

I don't see defined Cryptoanywhere. It's implicitly defined as Crypto::{Subtle,Bcrypt,Blowfish}

oprypin

@oprypin:matrix.org

[m]

@didactic-drunk: because Crypto is marked as originating from stdlib by its first occurrence in the whole code blob, and the whole stdlib is excluded from doc building

didactic-drunk

@didactic-drunk

@oprypin:matrix.org Now I have a workaround. Thank you

oprypin

@oprypin:matrix.org

[m]

@didactic-drunk: im scared. what is it?

didactic-drunk

@didactic-drunk

didactic-drunk/crypto-secret.cr@eb8ca96

From IRC (bridge bot)

@FromIRC

<oprypin> oh.

oprypin

@oprypin:matrix.org

[m]

wow what a nice deduction just from that hint

didactic-drunk

@didactic-drunk

:curtsey:

@me:ky.rs

[m]

@didactic-drunk I appreciate your explanation on what is not a secret, Lol.

Jonathan Silverman

@mixflame

please vote for my PR guys <3 amberframework/amber#1265

if you use amber

didactic-drunk

@didactic-drunk

@me:ky.rs You'll probably like Bidet (Who doesn't? They're hours of fun)

1 reply

postmodern

@postmodern:matrix.org

[m]

@didactic-drunk: do you wnat me to move ioctl.cr to crystal-posix? if so, could you look over the code first.

didactic-drunk

@didactic-drunk

@postmodern:matrix.org You're welcome to move it now, or not. I'll have to look in a few hours but that can be handled with PR's.

How do I check if a module exists in a macro?

4 replies

Kaia Leahy

@tenebrousedge

why?

usually if I am wondering about questions of that nature, I'm checking if an object subclasses a type, or whether it responds to a given method

didactic-drunk

@didactic-drunk

I have an optional module which may not exist if not required

Jonathan Silverman

@mixflame

there is a definite bug in resolving localhost sometimes in crystal on my OS

resulting in my crystal app starting sometimes in crashed states

Nolan Mayersky

@nolyoi

I'm trying to install crystal from source and getting a You need to have a crystal executable in your path! or set CRYSTAL env variable. I've tried CRYSTAL="$HOME/crystal/bin/crystal" and
export PATH="$HOME/crystal/bin/crystal:$PATH". Anyone know what I'm missing here?

Ali Naqvi

@naqvis

you need to have previous version of Crystal to compile newer version

Nolan Mayersky

@nolyoi

theres no way to build from source for unsupported linux distros?

figured it out. had to download the tarball and use that crystal binary to run make in the source

jhass

@jhass:m.aeshna.de

[m]

there's https://github.com/crystal-lang/bootstrap-script if you wouldn't trust that approach, but probably needs some patching up by now (and a lot of patience)

Rishav Sharan

@rishavs

is there a way to add new data to HTTP::Server::Context? I want to pass some connection specific data between middlewares

1 reply

jhass

@jhass:m.aeshna.de

[m]

If it's primitive data you could modify the request/response headers perhaps

See crystal-lang/crystal#3863 for some existing discussion around this

Matthew Berry

@mattrberry

Does anyone know of any native file browsers in crystal?

postmodern

@postmodern:matrix.org

[m]

@watzon: I remember you were working on crypto libraries for crystal. Ever heard of libnettle and libhogweed? Just noticed them today doing a system update.
https://www.lysator.liu.se/~nisse/nettle/

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