stackage
tilapia
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stackage
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Revisiting Haskell after 10 years
Writing Haskell programs that rely on third-party packages is still an issue when it’s a not actively maintained package. They get out of date with the base library (Haskell’s standard library), and you might see yourself in a situation where you need to downgrade to an older version. This is not exclusive to Haskell, but it happens more often than I’d like to assume. However, if you only rely on known well-maintained libraries/frameworks such as Aeson, Squeleto, Yesod, and Parsec, to name a few, it’s unlikely you will face troubles at all, you just need to be more mindful of what you add as a dependency. There’s stackage.org now, a repository that works with Stack, providing a set of packages that are proven to work well together and help us to have reproducible builds in a more manageable way—not the solution for all the cases but it’s good to have it as an option.
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Leaving Haskell Behind
> That is fine, as far as it goes, but obviously this will, at some point, be at odds with the interests of programmers looking to use Haskell as a practical, stable tool.
That's what Stackage is.
Stackage provides consistent sets of Haskell packages, known to build together and pass their tests before becoming Stackage Nightly snapshots and LTS (Long Term Support) releases. [1]
Java will never get this.
[1] https://www.stackage.org/
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Haskell IDE setup
makefile_dir := $(dir $(abspath $(lastword $(MAKEFILE_LIST)))) export PATH := $(makefile_dir):$(PATH) project_name ?= project_main ?= src/.hs retag_file ?= $(project_main) stack.yaml: @test -f stack.yaml || (echo -e "This makefile requires a 'stack.yaml' for your project.\nYou don't need to use 'stack' to build your project.\nYou just need a 'stack.yaml' specifying a resolver compatible with your GHC version.\nSee https://www.stackage.org/" && exit 1) stack: stack.yaml @which stack || (echo -e "This makefile requires 'stack' to be on your path. Use GHCup to install it.\nSee https://www.haskell.org/ghcup/" && exit 1) .PHONY: stack warning.txt: -@uname -a | grep -q Darwin && echo "WARNING: On Mac, you must alias 'make' to 'gmake' in your shell config file (e.g. ~/.bashrc or ~/.zshrc). Symbolic links will not work." | tee warning.txt @echo "Add 'warning.txt' to your .gitignore file if you never want to see this message again." hasktags: warning.txt stack @echo 'stack exec -- hasktags' > hasktags @chmod +x hasktags @echo "You might like to add 'hasktags' to your .gitignore file." format: stack @stack exec -- fourmolu --stdin-input-file $(project_main) .PHONY: format retag: warning.txt stack @stack exec -- haskdogs -i $(retag_file) --hasktags-args "-x -c -a" | sort -u -o tags tags .PHONY: retag tags: warning.txt hasktags stack @stack exec -- haskdogs .PHONY: tags ghcid: stack @stack exec -- ghcid \ --command 'stack repl --ghc-options "-fno-code -fno-break-on-exception -fno-break-on-error -v1 -ferror-spans -j"' \ --restart stack.yaml \ --restart $(project_name).cabal \ --warnings \ --outputfile ./ghcid.txt .PHONY: ghcid
- stack
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Most current materials for learning Haskell
(why lts-18.28? it's the latest 8.10 release on https://www.stackage.org/ )
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Monthly Hask Anything (March 2022)
I don't see way community maintenance can change the GHC for nightly.
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Is it possible to install C libraries before building on Hackage?
It makes total sense that it fails since at no point I requested that the library be installed, which makes me wonder: Is there any way to request Hackage to install SDL and GLEW before attempting the build? I see Stackage has debian-bootstrap.sh. Does something similar exist for Hackage?
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No idea how to add packages
At this point, you can try a Stack snapshot that uses an older version of GHC. Looking at Stackage, you can see that the latest version before 8.10.* is 8.8.4 (using LTS 16.31). Starting over with that snapshot, you find that the packages that you need are in the snapshot and work.
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[GHC Proposals] GHC Maintainer preview
On the contrary, I think this is standard practice for packages which are part of stackage. When stackage nightly switches to a new version of ghc, all the packages which are incompatible with the new ghc are dropped from nightly. My understanding is that maintainers are then expected to fix their packages, at which point more and more packages are included in the nightly snapshot. The next lts to include that version of ghc is only released later, once most packages have been added back, so unlike ghc users who diligently upgrade to the latest ghc, stackage users who diligently upgrade the latest lts snapshot shouldn't see a big drop in the number of compatible packages.
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Setup dev container with language server out of the box
I found the latest stack lts version, and it's associated ghc version here: https://www.stackage.org/
tilapia
- Please contribute to the GHC 9.8 breakage inventory
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Match against 'non symbol' ASCII characters
Perhaps the documentation for Char should contain examples of how you write the literals. Tracking as https://github.com/tomjaguarpaw/tilapia/issues/128
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2022 State of Haskell Survey
Can you please report concrete examples here: https://github.com/tomjaguarpaw/tilapia/issues/new
I'll do what I can to improve the situation, but I need to know which packages precisely you are talking about.
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Is Haskell Platform no longer supported?
Thanks! Tracking at https://github.com/tomjaguarpaw/tilapia/issues/109
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Coming back to Haskell after a couple of years, what changes should I be aware of?
It would be nice with a "modern cabal for stack users" tutorial (ddg tells me it's an issue https://github.com/tomjaguarpaw/tilapia/issues/11 ), answering questions like
- A simple guide: set-up a Haskell development environment in Windows 10
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Can't get things to work. It is normal to learn haskell with plain vim?
If you're on Windows and you're feeling brave you could try these new instructions developed by a collaborator of mine over at the tilapia project. If anything goes wrong with those instructions then please put a message on the pull request describing what the problem was and we'll try to get it fixed.
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Haskell as a first timer - Am I missing something ?
Great! I'd be happy to have you on board. Please "Watch" the repo so that you are notified of discussions that happen there. Feel free to start your own discussions at any time by opening an issue.
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Why exactly I want Boring Haskell to happen
Feel free to collaborate with me on Tilapia. At the very least I would welcome knowing about your ideas.
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Noob questions
I also have a personal project (tilapia) for tracking difficulties in the Haskell ecosystem. Feel free to post any observations, questions or difficulties there.
What are some alternatives?
cblrepo - Tool to simplify managing a consistent set of Haskell packages for distributions.
haskell-language-server - Official haskell ide support via language server (LSP). Successor of ghcide & haskell-ide-engine.
cargo-crev - A cryptographically verifiable code review system for the cargo (Rust) package manager.
purescript-halogen - A declarative, type-safe UI library for PureScript.
Cabal - Official upstream development repository for Cabal and cabal-install
vscode-haskell - VS Code extension for Haskell, powered by haskell-language-server
stackage-curator
hpack - hpack: A modern format for Haskell packages
cabal2nix - Generate Nix build instructions from a Cabal file
ghcid - Very low feature GHCi based IDE
stackage-upload - A more secure version of cabal upload which uses HTTPS
haskelldb - A library for building re-usable and composable SQL queries.