2 files changed, 125 insertions, 0 deletions
diff --git a/deps/discord-haskell/.github/workflows/main.yml b/deps/discord-haskell/.github/workflows/main.yml
new file mode 100644
index 0000000..aec9070
--- /dev/null
+++ b/deps/discord-haskell/.github/workflows/main.yml
@@ -0,0 +1,91 @@
+name: CI
+
+# when the workflow will run
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+
+  # Allows manually starting this workflow from the Actions tab
+  workflow_dispatch:
+
+jobs:
+  # To dynamically create a build matrix, we generate a JSON output from one job
+  # and use fromJson in the next job to construct the matrix.
+  # This dynamic approach means we don't have to update the CI file when we
+  # change supported GHC versions.
+  generate-matrix:
+    name: Generate GHC build matrix
+    runs-on: ubuntu-latest
+    outputs:
+      ghc-matrix: ${{ steps.set-ghc-matrix.outputs.versions }}
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Parse the cabal tested-with stanza
+        id: parse
+        run: |
+          echo "::set-output name=tested-with-versions::$(runghc .github/workflows/parseVersions.hs)"
+
+      - name: Set the GHC matrix for the next job
+        id: set-ghc-matrix
+        # We use single quotes here, since the output from the previous step
+        # will not have escaped double quotes, and it's just easier to use single
+        # quotes on the outside than try to escape the inner double quotes.
+        run: echo '::set-output name=versions::{"ghc-version":${{ steps.parse.outputs.tested-with-versions }}}'
+
+  build:
+    name: Build Check
+    needs: generate-matrix
+    runs-on: ubuntu-latest
+    strategy:
+      # Whether to stop other jobs in the matrix if one fails. This is undesirable
+      # since we want to check e.g. it compiles on 8.10.7 regardless of the status
+      # of 9.X.
+      fail-fast: false
+      # Feed the json from the previous job.
+      matrix: ${{ fromJson(needs.generate-matrix.outputs.ghc-matrix) }}
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: haskell/actions/setup@v2
+        id: setup-haskell
+        with:
+          # We install a global GHC and use Stack with --system-ghc
+          ghc-version: ${{ matrix.ghc-version }}
+          enable-stack: true
+
+      # First run cabal, since it is generally quicker
+      - name: "Cabal: Update cabal package database, generate build plan"
+        run: |
+          cabal update
+          cabal build --dry-run
+
+      - name: "Cabal: Cache Dependencies"
+        id: cache
+        uses: actions/cache@v2
+        with:
+          # Include the build plan file generated by cabal configure, but allow
+          # restoring without its hash as long as the GHC version is the same.
+          key: cabal-${{ runner.os }}-${{ matrix.ghc-version }}-${{ hashFiles('**/plan.json') }}
+          restore-keys: |
+            cabal-${{ runner.os }}-${{ matrix.ghc-version }}
+          path: |
+            ${{ steps.setup-haskell.outputs.cabal-store }}
+            dist-newstyle
+
+      - name: "Cabal: Build"
+        run: cabal build
+
+      # Now run stack
+      - name: "Stack: Cache ~/.stack"
+        id: cache-stack
+        uses: actions/cache@v2
+        with:
+          path: ~/.stack
+          key: stack-${{ runner.os }}-${{ matrix.ghc-version }}-${{ hashFiles('stack.yaml') }}
+          restore-keys: |
+            stack-${{ runner.os }}-${{ matrix.ghc-version }}
+
+      - name: "Stack: Build"
+        run: stack build --system-ghc
diff --git a/deps/discord-haskell/.github/workflows/parseVersions.hs b/deps/discord-haskell/.github/workflows/parseVersions.hs
new file mode 100644
index 0000000..3302f17
--- /dev/null
+++ b/deps/discord-haskell/.github/workflows/parseVersions.hs
@@ -0,0 +1,34 @@
+-- Small script to use the Cabal library to parse the Tested-With stanza
+-- from discord-haskell.cabal, and output to stdout in a JSON friendly list.
+module Main where
+
+import Prelude hiding (readFile)
+import Data.ByteString (readFile)
+import Data.List (intersperse)
+import Data.Maybe (maybeToList)
+import Distribution.Compiler (CompilerFlavor(GHC))
+import Distribution.PackageDescription.Parsec (parseGenericPackageDescriptionMaybe)
+import Distribution.Pretty (pretty)
+import Distribution.Types.GenericPackageDescription (GenericPackageDescription(packageDescription))
+import Distribution.Types.PackageDescription (PackageDescription(testedWith))
+import Distribution.Types.Version (versionNumbers)
+import Distribution.Types.VersionRange.Internal (VersionRange(ThisVersion))
+import Text.PrettyPrint (render, brackets, comma, doubleQuotes)
+
+main = do
+    bs <- readFile "discord-haskell.cabal"
+    let mbVersions = testedWith . packageDescription <$> parseGenericPackageDescriptionMaybe bs
+    -- e.g. mbVersions = Just [(GHC,ThisVersion (mkVersion [8,10,7])),(GHC,ThisVersion (mkVersion [9,2])),(GHC,ThisVersion (mkVersion [9,4,1]))]
+    let versions = concat $ maybeToList mbVersions
+    -- e.g. versions = [(GHC,ThisVersion (mkVersion [8,10,7])),(GHC,ThisVersion (mkVersion [9,2])),(GHC,ThisVersion (mkVersion [9,4,1]))]
+    let ghcVersions =
+            [ ghcVersion
+            | (flavor, versionRange) <- versions
+            -- Filter only GHC
+            , GHC == flavor
+            -- Filter only to exact matches: "== VERSION"
+            , let (ThisVersion ghcVersion) = versionRange
+            ]
+    -- e.g. ghcVersions = [mkVersion [8,10,7],mkVersion [9,2],mkVersion [9,4,1]]
+    let prettyVersions = brackets $ mconcat $ intersperse comma $ map (doubleQuotes . pretty) ghcVersions
+    putStrLn $ render prettyVersions