From c49871d17de103cfac0b144a137b69a341f09960 Mon Sep 17 00:00:00 2001
From: 0chroma <21014+0chroma@users.noreply.github.com>
Date: Mon, 1 Jun 2026 17:05:28 -0700
Subject: [PATCH] feat: add haskell-language-server 2.14.0.0

Add package for the Haskell Language Server (HLS), the official LSP
implementation for Haskell. Builds from source using GHC + Cabal with
dynamic linking, copying the binary and all required shared libraries
via ldd dependency resolution.

- Source: GitHub tag 2.14.0.0 with automatic extraction
- Build deps: base, cabal, ghc
- Runtime deps: glibc
- Network access enabled for cabal dependency index updates
- Includes standalone version check test
---
 packages/haskell-language-server/build.ncl | 64 ++++++++++++++++++++++
 packages/haskell-language-server/build.sh  | 31 +++++++++++
 2 files changed, 95 insertions(+)
 create mode 100644 packages/haskell-language-server/build.ncl
 create mode 100755 packages/haskell-language-server/build.sh

diff --git a/packages/haskell-language-server/build.ncl b/packages/haskell-language-server/build.ncl
new file mode 100644
index 00000000..c9344c7f
--- /dev/null
+++ b/packages/haskell-language-server/build.ncl
@@ -0,0 +1,64 @@
+let { Attrs, BuildSpec, Local, Needs, OutputBin, OutputLib, Source, Test, .. } = import "minimal.ncl" in
+
+let base = import "../base/build.ncl" in
+let cabal = import "../cabal/build.ncl" in
+let ghc = import "../ghc/build.ncl" in
+let glibc = import "../glibc/build.ncl" in
+
+let version = "2.14.0.0" in
+
+{
+  name = "haskell-language-server",
+
+  build_deps = [
+    { file = "build.sh" } | Local,
+    {
+      url = "https://github.com/haskell/haskell-language-server/archive/refs/tags/%{version}.tar.gz",
+      sha256 = "02fdd2ea8048cddce0872f78fcc4ba15558f751333c97d24b9abadac8ee27dcb",
+      extract = true,
+      strip_prefix = "haskell-language-server-%{version}",
+    } | Source,
+    base,
+    ghc,
+    cabal,
+  ],
+
+  runtime_deps = [glibc],
+
+  needs =
+    {
+      dns = {},
+      internet = {},
+    } | Needs,
+
+  cmd = "./build.sh",
+
+  build_args = {
+    include version,
+  },
+
+  outputs = {
+    hls = { glob = "usr/bin/haskell-language-server" } | OutputBin,
+    libs = { glob = "usr/lib/*.so*" } | OutputLib,
+  },
+
+  attrs =
+    {
+      upstream_version = version,
+      source_provenance = {
+        category = 'GithubRepo,
+        owner = "haskell",
+        repo = "haskell-language-server",
+      },
+      build_cost_multiple = 4,
+    } | Attrs,
+
+  tests = {
+    version_check =
+      {
+        class = 'Standalone,
+        test_deps = [],
+        cmds = [["haskell-language-server", "--version"]],
+      } | Test,
+  },
+} | BuildSpec
diff --git a/packages/haskell-language-server/build.sh b/packages/haskell-language-server/build.sh
new file mode 100755
index 00000000..83643db9
--- /dev/null
+++ b/packages/haskell-language-server/build.sh
@@ -0,0 +1,31 @@
+#!/bin/bash
+set -euo pipefail
+
+# The source tarball is already extracted with strip_prefix, so we're in the source root
+
+# Build HLS for the GHC version available in the sandbox
+export GHC="$(command -v ghc)"
+export CABAL="$(command -v cabal)"
+
+# Update cabal package index
+cabal update
+
+# Build HLS with the available GHC version
+cabal build \
+  --ghc-options="-j$(nproc)" \
+  exe:haskell-language-server
+
+# Install to OUTPUT_DIR
+mkdir -p "$OUTPUT_DIR"/usr/bin
+mkdir -p "$OUTPUT_DIR"/usr/lib
+
+# Find and copy the built binary from cabal's build directory
+HLS_BIN=$(cabal list-bin exe:haskell-language-server)
+cp "$HLS_BIN" "$OUTPUT_DIR"/usr/bin/
+
+# Copy all shared Haskell libraries the binary depends on
+for lib in $(ldd "$HLS_BIN" | grep '\.so' | awk '{print $3}'); do
+  if [ -n "$lib" ] && [ -f "$lib" ]; then
+    cp "$lib" "$OUTPUT_DIR"/usr/lib/
+  fi
+done