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* FromGitter
* Blacksmoke16 downvoted
<FromGitter>
<Blacksmoke16> ;)
<FromGitter>
<girng> :(
<FromGitter>
<dscottboggs_gitlab> I saw a thread once where someone proposed a similar syntax feature in python, and it was shot down for, among other reasons, because it was there to be a "tax on the developer" to prevent them from having too many variables passed to the constructor. lol
<FromGitter>
<girng> thanks for the constructor `@` trick d scott. it's very nice
<FromGitter>
<girng> when i write my initialize now, i start writing the `@` subconsciously
<FromGitter>
<dscottboggs_gitlab> np
<FromGitter>
<girng> i'm testing pass by copy function parameters
<FromGitter>
<girng> actualy.. ignore me, def + will work with += just tested it :D
<FromGitter>
<girng> Here's my custom struct i'm working on, would this be how to limit the decimals to two places? https://play.crystal-lang.org/#/r/54qk is it possible to do it without converting it to a string?
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<FromGitter>
<sam0x17> how would I go about malloc-ing a C string of a specified size (so I can pass it to a C library)?
<FromGitter>
<sam0x17> pass a pointer to the first element of an Array(UInt8)?
<FromGitter>
<bew> No, use `Slice(UInt8)`
<FromGitter>
<bew> (alias: `Bytes`)
<FromGitter>
<dscottboggs_gitlab> why a slice if it's a specific size?
<FromGitter>
<sam0x17> so what would the initialization look like for that?
<FromGitter>
<bew> A slice is basically a struct for a pointer to some memory, and a size.. So it's perfect for that
<FromGitter>
<bew> Btw you could also use a `StaticArray` if all you want is to pass it the a c function, then create a `String` object from it
<FromGitter>
<bew> Well look at the docs, you create a slice with a size and a default value (to init each slot of the slice)
<FromGitter>
<sam0x17> thx
<FromGitter>
<bew> Or for the staticarray, you can do `bla = uninitialized UInt8[256]`, and use `pointerof(bla)` to pass it around to the c binding, or the string ctor
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<jokke>
fridgerator: yeah i thought about that but i wanted to use scratch as the base image so there's literally _nothing_ there
<jokke>
re: using netcat to check if postgres is running
<jokke>
i guess i have to implement the loop in crystal itself
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<jokke>
i'm a bit confused about the Dockerfile of crystal
<jokke>
i didn't know recursive images are possible
<jokke>
anyhow i was wondering what distro the image is based on
<FromGitter>
<Timbus> since it does an apt-get, it must be debian, or ubuntu
<FromGitter>
<Timbus> guess you could dive into a shell and check out the release info..
<FromGitter>
<j8r> you can check `/etc/issue`. I think it's debian 9
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<FromGitter>
<vladfaust> Wake me up
<FromGitter>
<vladfaust> September has ended
<jokke>
very interesting
<jokke>
to ship working static binaries you can't use the official crystal image
<jokke>
also it would be against the LGPL
<jokke>
(which is the license of glibc)
<FromGitter>
<Prutheus> @Sija I am on Mojave, I can’t measure performance differences yet. But I have not tested on performance, but if you want me to run performance testing scripts just tell me
<FromGitter>
<j8r> i don't know why the default image isn't on Alpine
<jokke>
using alpine as base image you can link libc statically as alpine uses musl libc
<jokke>
which is MIT
<FromGitter>
<j8r> I've a question
<jokke>
shoot
<jokke>
jhass: any reason why the docker image isn't based on alpine?
<FromGitter>
<j8r> If I compile a MIT program statically against glibc
<FromGitter>
<j8r> What's the problem with GPL or LGPL?
<jokke>
j8r: you would have to ship sources for glibc
<FromGitter>
<j8r> So I need to ship the binary and the sources with what I've built the binary
<FromGitter>
<j8r> I can't just tell: look at github.com/whatever for sources?
<jokke>
i'm not 100% sure
<jokke>
Or provide everything that allow the user to relink the application with a different version of the LGPL source code. In this case the other requirements are the same as if it was dynamically linked.
<jokke>
from the stackoverflow answer
<jokke>
you do that with the source code
<jokke>
i think it's becoming a problem with proprietary code that you don't release the source for
<jokke>
which is my case
<FromGitter>
<j8r> Yes, I think there is no problem for open source if you have a compatible, more permissive license
<jokke>
asterite: i'd really appreciate a list of runtime clib deps somewhere in the docs
<FromGitter>
<j8r> and more importantly, the source code is available to recompile the same binary (e.g. no proprietary patch)
<jokke>
even if they're optional.
<jokke>
yeah
<FromGitter>
<j8r> `ldd ./mybin`?
<Tortice>
speaking of static linking, I can't get --link-flags="-static" to work, ld complains about missing packages, but when I check with ldconfig -p, they are listed
<jokke>
Tortice: just use --static
<jokke>
it will use the -static link flag
<jokke>
Tortice: also it totally depends on the distro you're compiling it on
<jokke>
Tortice: i use arch and it doesn't ship static libs by default
<Tortice>
oh, that's the same distro I'm using, good to know
<jokke>
:)
<Tortice>
sorry for the stupid question
<jokke>
not stupid
<jokke>
Tortice: if you want to make it work you will need to use asp to get the dependencies and modify their PKGBUILDs to include `options=('staticlibs')`
<FromGitter>
<girng> how can i set thestruct value based on an operator def method?
<jokke>
or you can save yourself a lot of trouble and build inside docker
<jokke>
and then just copy the static bin out of the container
<FromGitter>
<girng> i've tried self[index] = value, and @index = value, none work :/
<jokke>
Tortice: but as i just said, you can't use the crystallang/crystal image
<jokke>
i mean, you can, and it will mostly work, but not always
<jokke>
girng that won't work without a macro
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<FromGitter>
<Prutheus> Hello. I am using crecto to manage database access. But I need to build the models and migrations by myself, but I don’t know how the migrations needs to look for my models. Is there any way to auto-generate the migrations?
<jokke>
Prutheus crecto does have it's own gitter though
<FromGitter>
<Prutheus> oh okay
<FromGitter>
<girng> @jokke that's pretty cool, ty
<jokke>
girng: welcome to the world of macros :P
<FromGitter>
<girng> hehe
<FromGitter>
<Prutheus> do you know any better ORM systems than crecto or granite?
<FromGitter>
<bew> Better in which ways?
<FromGitter>
<Prutheus> auto-generating sql stuff
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<FromGitter>
<Prutheus> I need an ORM system where I can build my model and then automatically run the migrations which are genereated from my .cr model file
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<FromGitter>
<fridgerator> I dont know, try jennifer.cr
<FromGitter>
<vladfaust> Why? Because ⏎ ⏎ a. Parsing from all sources (path, query, all content-types) ⏎ b. Type-casting, `id` is actually `Int32` and `additional_data` is `struct` and `additional_data.deep` is `struct | Nil`. Will raise `Params::TypeCastError` on parse if couldn't cast though [https://gitter.im/crystal-lang/crystal?at=5bb21abbef4afc4f28013406]
<FromGitter>
<vladfaust> This module will bring type safe params to Kemal, Lucky, Amber and other frameworks :)
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<FromGitter>
<yxhuvud> doesn't lucky already have type safe params?
<FromGitter>
<vladfaust> Yeah, it only supports query params though
<FromGitter>
<vladfaust> No nesting nor arrays
<FromGitter>
<vladfaust> @paulcsmith once asked if I could extract Prism params to a shard and even promised to get in touch with me about the architecture, but never heard from him thereafter 😅
<FromGitter>
<fenicks> @vladfaust Really cool, 👍
<FromGitter>
<vladfaust> Thanks, I appreciate
* FromGitter
* dscottboggs_gitlab has been making use of macros and is now ruined for other languages
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<FromGitter>
<paulcsmith> @vladfaust Sorry about that :D Been super busy with a new feature in Lucky that is taking longer than expected! I do plan to reach out, but I am just not sure when. Once this feature is done I need to update a bunch of docs and code for the next Lucky release
<FromGitter>
<paulcsmith> It's fairly large so it is taking a bit :D
<FromGitter>
<vladfaust> I understand, no problem. However, params will require some work to adapt with a framework as well, so it never ends :)
<FromGitter>
<vladfaust> I'm wondering what is that feature?
<FromGitter>
<paulcsmith> Getting all the edge cases sorted out is tricky. Making it easy to merge encrypted files is especially tricky, but it is getting clsoer
<FromGitter>
<Prutheus> at jennifer.cr … how to get all rows in a table? I can do User.all … but how to list all rows then?
<FromGitter>
<girng> whe nwas that benchmark done again
<FromGitter>
<girng> it's been 2 years it looks like
<FromGitter>
<proyb6> @girng I did it last night with recently version on 0.26.1 and 2.11
<FromGitter>
<girng> o
<FromGitter>
<asterite> In Crystal he reads all the file in memory then splits it, in Go he uses a scanner to find each line... that's of course slower in Crystal because of a different algorithm used
<FromGitter>
<asterite> not saying that will make Crystal faster, Go is being developed by Google
<FromGitter>
<j8r> yes the algos are very different
<FromGitter>
<asterite> well, then the benchmark doesn't make sense :-)
<FromGitter>
<asterite> please use the same algorithm (probably using gets or something to count lines, but even then I think it's not the same because `gets` will create a new string each time, so you'll have to find a way to do that in Crystal
<FromGitter>
<asterite> see, Go's scanner uses an internal slice to reuse memory to find the next token, and this is explicitly documented... there's no way to nicely do that in Crystal (I guess you'd need a `IO::Scanner` type too)
<FromGitter>
<Prutheus> Can someone please tell me how I can get the results out of a query at Jennifer.cr, e.g. from `User.all.where {_email == email}` ?
<FromGitter>
<j8r> @Prutheus if nobody answer, this means nobody here use/know this particular library. Please wait and don't ask again :/
<FromGitter>
<j8r> You can also try another ORM, like the one from @vladfaust . He would be able to answer you :)
<FromGitter>
<Prutheus> hmm but i need to access my database entries now
<FromGitter>
<Prutheus> no i need jennifer, its the best one currently, cause i do not need to generate own mysql syntax migrations
<FromGitter>
<Blacksmoke16> and see what happens :p
<FromGitter>
<Blacksmoke16> `My favorite part. Jennifer allows you to build lazy evaluated queries with chaining syntax. ` so yea thats prob what is happening
<jokke>
i tried just returning the return value of the yield but that was always nilable
<jokke>
i guess because from_io doesn't always yield
<jokke>
but by the looks of the source it does. so i'm a bit confused
<FromGitter>
<S-YOU> @bew, with some stdlib like Dir.glob. basically following code (which wouldn't directly compile) ⏎ ⏎ ``` code paste, see link``` ⏎ ⏎ read_file is C 's open, and read, close calls. malloc is also C [https://gitter.im/crystal-lang/crystal?at=5bb26035bbdc0b2505ce6d7e]
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<FromGitter>
<fenicks> I have this error on CentOS7 with libssl, the installed version is libssl.so.1.0.2 and crystal program are looking for 1.1 : `error while loading shared libraries: libssl.so.1.1` ⏎ How can I specify the correct version ? Is that an issue with the detection macro for the ssl version
<FromGitter>
<fenicks> It'll be very cool if Crystal didn't depends on LibSSL but have an implementation entirely written in Crystal.
<FromGitter>
<dscottboggs_gitlab> I think that would be asking for security bugs. Like I don't see anything wrong with doing an initial implementation of something security focused in crystal, but if there's a library that you can just import that has already been thoroughly vetter, why take a chance?
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<FromGitter>
<girng> @fenicks like a shard?
<FromGitter>
<girng> AFAIK there is a github thread of certain features they think should be in shards, and some that should be removed from standard lib
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<FromGitter>
<dscottboggs_gitlab> Is there any way to get a segfault in crystal when you're not working with "unsafe" code? I thought crystal was null-safe?
<FromGitter>
<fenicks> @girng For tls and crypto libs, in standard/core library but in pure Crystal
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<FromGitter>
<Sija> @dscottboggs_gitlab there shouldn’t be, and what does it have to do with being null-safe (whatever that means)?
<FromGitter>
<fenicks> @dscottboggs_gitlab the problem I have with openssl binding in crystal is that some distro has different version and crystal binary refer another and are missing the correct name/version of the shared library installed in host. In my case I can't compile a specific version of libssl to fix that or change CentOS7 for Ubuntu per example.
<FromGitter>
<dscottboggs_gitlab> null safe means it throws a compile time error if the value is nillable, as opposed to languages like Go where nil regularly used and not checked for at compile time
<FromGitter>
<Sija> ok, that’s what you have in Crystal
<FromGitter>
<dscottboggs_gitlab> my spec is causing a segfault....
<FromGitter>
<Sija> could post the offending code?
<FromGitter>
<dscottboggs_gitlab> @fenicks I agree that that's a problem, but I don't think rewriting LibSSL is the solution to that. there could just be a patch to make it aware of older versions. I suppose static linking isn't an option?
<FromGitter>
<fenicks> @dscottboggs_gitlab Static linking makes the program runnable but hangs when dealing with tls
<FromGitter>
<dscottboggs_gitlab> what about docker/snap/appimage?
<FromGitter>
<fenicks> With Docker and the CentOS7 image crystal complaint with execvp error. I'm trying another king of image
<FromGitter>
<Sija> @dscottboggs_gitlab sorry, no idea :/
<FromGitter>
<dscottboggs_gitlab> damn, I'll post a bug report then. thanks for taking a look