Initial commit

.gitignore

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+/bower_components/
+/node_modules/
+/.pulp-cache/
+/output/
+/generated-docs/
+/.psc-package/
+/.psc*
+/.purs*
+/.psa*
+/.spago

package.json

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+{
+  "name": "purescript-yoga-variation",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/rowtype-yoga/purescript-yoga-variation.git"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "bugs": {
+    "url": "https://github.com/rowtype-yoga/purescript-yoga-variation/issues"
+  },
+  "homepage": "https://github.com/rowtype-yoga/purescript-yoga-variation#readme"
+}

packages.dhall

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+{-
+Welcome to your new Dhall package-set!
+
+Below are instructions for how to edit this file for most use
+cases, so that you don't need to know Dhall to use it.
+
+## Use Cases
+
+Most will want to do one or both of these options:
+1. Override/Patch a package's dependency
+2. Add a package not already in the default package set
+
+This file will continue to work whether you use one or both options.
+Instructions for each option are explained below.
+
+### Overriding/Patching a package
+
+Purpose:
+- Change a package's dependency to a newer/older release than the
+    default package set's release
+- Use your own modified version of some dependency that may
+    include new API, changed API, removed API by
+    using your custom git repo of the library rather than
+    the package set's repo
+
+Syntax:
+where `entityName` is one of the following:
+- dependencies
+- repo
+- version
+-------------------------------
+let upstream = --
+in  upstream
+  with packageName.entityName = "new value"
+-------------------------------
+
+Example:
+-------------------------------
+let upstream = --
+in  upstream
+  with halogen.version = "master"
+  with halogen.repo = "https://example.com/path/to/git/repo.git"
+
+  with halogen-vdom.version = "v4.0.0"
+  with halogen-vdom.dependencies = [ "extra-dependency" ] # halogen-vdom.dependencies
+-------------------------------
+
+### Additions
+
+Purpose:
+- Add packages that aren't already included in the default package set
+
+Syntax:
+where `<version>` is:
+- a tag (i.e. "v4.0.0")
+- a branch (i.e. "master")
+- commit hash (i.e. "701f3e44aafb1a6459281714858fadf2c4c2a977")
+-------------------------------
+let upstream = --
+in  upstream
+  with new-package-name =
+    { dependencies =
+       [ "dependency1"
+       , "dependency2"
+       ]
+    , repo =
+       "https://example.com/path/to/git/repo.git"
+    , version =
+        "<version>"
+    }
+-------------------------------
+
+Example:
+-------------------------------
+let upstream = --
+in  upstream
+  with benchotron =
+      { dependencies =
+          [ "arrays"
+          , "exists"
+          , "profunctor"
+          , "strings"
+          , "quickcheck"
+          , "lcg"
+          , "transformers"
+          , "foldable-traversable"
+          , "exceptions"
+          , "node-fs"
+          , "node-buffer"
+          , "node-readline"
+          , "datetime"
+          , "now"
+          ]
+      , repo =
+          "https://github.com/hdgarrood/purescript-benchotron.git"
+      , version =
+          "v7.0.0"
+      }
+-------------------------------
+-}
+let upstream =
+      https://github.com/purescript/package-sets/releases/download/psc-0.15.2-20220531/packages.dhall
+        sha256:278d3608439187e51136251ebf12fabda62d41ceb4bec9769312a08b56f853e3
+
+in  upstream

spago.dhall

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+{-
+Welcome to a Spago project!
+You can edit this file as you like.
+
+Need help? See the following resources:
+- Spago documentation: https://github.com/purescript/spago
+- Dhall language tour: https://docs.dhall-lang.org/tutorials/Language-Tour.html
+
+When creating a new Spago project, you can use
+`spago init --no-comments` or `spago init -C`
+to generate this file without the comments in this block.
+-}
+{ name = "my-project"
+, dependencies =
+  [ "arrays", "console", "effect", "prelude", "validation", "variant" ]
+, packages = ./packages.dhall
+, sources = [ "src/**/*.purs", "test/**/*.purs" ]
+}

src/Yoga/Variation/Variation.purs

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+module Yoga.Variation.Variation where
+
+import Prelude
+
+import Data.Array.NonEmpty (NonEmptyArray)
+import Data.Array.NonEmpty as NonEmpty
+import Data.Symbol (class IsSymbol)
+import Data.Validation.Semigroup as Validation
+import Data.Variant as Variant
+import Prim.Row (class Cons)
+import Type.Proxy (Proxy(..))
+
+type Validated err result = Validation.V (NonEmptyArray (Variant.Variant err)) result
+
+valid :: forall err result. result -> Validated err result
+valid = pure
+
+invalid
+  ∷ ∀ (t63 ∷ Type) (sym ∷ Symbol) (error ∷ Type) (others ∷ Row Type) (errors ∷ Row Type)
+  . Cons sym error others errors
+  ⇒ IsSymbol sym
+  ⇒ Proxy sym
+  → error
+  → Validation.V (NonEmptyArray (Variant.Variant errors)) t63
+invalid proxy value = Validation.invalid $ NonEmpty.singleton $ Variant.inj proxy value
+
+key ∷ ∀ (sym ∷ Symbol). Proxy sym
+key = Proxy

test/Main.purs

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+module Test.Main where
+
+import Prelude
+
+import Effect (Effect)
+import Effect.Class.Console (log)
+
+main :: Effect Unit
+main = do
+  log "🍝"
+  log "You should add some tests."