From 3ea54e69727b0195f25a2be909ae821223621a64 Mon Sep 17 00:00:00 2001
From: oxalica <oxalicc@pm.me>
Date: Sun, 19 Jan 2020 03:34:16 +0800
Subject: [PATCH] rust-analyzer: init at unstable-2020-03-09

---
 .../tools/rust/rust-analyzer/default.nix      | 14 ++++++
 .../tools/rust/rust-analyzer/generic.nix      | 45 +++++++++++++++++++
 .../tools/rust/rust-analyzer/update.sh        | 39 ++++++++++++++++
 .../tools/rust/rust-analyzer/wrapper.nix      | 16 +++++++
 pkgs/top-level/all-packages.nix               |  2 +
 5 files changed, 116 insertions(+)
 create mode 100644 pkgs/development/tools/rust/rust-analyzer/default.nix
 create mode 100644 pkgs/development/tools/rust/rust-analyzer/generic.nix
 create mode 100755 pkgs/development/tools/rust/rust-analyzer/update.sh
 create mode 100644 pkgs/development/tools/rust/rust-analyzer/wrapper.nix

diff --git a/pkgs/development/tools/rust/rust-analyzer/default.nix b/pkgs/development/tools/rust/rust-analyzer/default.nix
new file mode 100644
index 000000000000..627184e7b23f
--- /dev/null
+++ b/pkgs/development/tools/rust/rust-analyzer/default.nix
@@ -0,0 +1,14 @@
+{ pkgs, callPackage }:
+
+{
+  rust-analyzer-unwrapped = callPackage ./generic.nix rec {
+    rev = "2020-03-09";
+    version = "unstable-${rev}";
+    sha256 = "1m97sinfyg43p3crhbjrsgf64bn5pyj7m96ikvznps80w8dnsv5n";
+    cargoSha256 = "0rxmyv8va4za0aghwk9765qn4xwd03nnry83mrkjidw0ripka5sf";
+  };
+
+  rust-analyzer = callPackage ./wrapper.nix {} {
+    unwrapped = pkgs.rust-analyzer-unwrapped;
+  };
+}
diff --git a/pkgs/development/tools/rust/rust-analyzer/generic.nix b/pkgs/development/tools/rust/rust-analyzer/generic.nix
new file mode 100644
index 000000000000..de755ec17ff5
--- /dev/null
+++ b/pkgs/development/tools/rust/rust-analyzer/generic.nix
@@ -0,0 +1,45 @@
+{ lib, stdenv, fetchFromGitHub, rustPlatform, darwin
+, useJemalloc ? false
+, doCheck ? true
+
+# Version specific args
+, rev, version, sha256, cargoSha256 }:
+
+rustPlatform.buildRustPackage {
+  pname = "rust-analyzer-unwrapped";
+  inherit version cargoSha256;
+
+  src = fetchFromGitHub {
+    owner = "rust-analyzer";
+    repo = "rust-analyzer";
+    inherit rev sha256;
+  };
+
+  preBuild = "pushd crates/rust-analyzer";
+  # Do not checking other crates in checkPhase.
+  preInstall = "popd";
+
+  cargoBuildFlags = lib.optional useJemalloc "--features=jemalloc";
+
+  nativeBuildInputs = lib.optionals doCheck [ rustPlatform.rustcSrc ];
+
+  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin
+    [ darwin.apple_sdk.frameworks.CoreServices ];
+
+  inherit doCheck;
+  # Skip tests running `rustup` for `cargo fmt`.
+  preCheck = ''
+    fakeRustup=$(mktemp -d)
+    ln -s $(command -v true) $fakeRustup/rustup
+    export PATH=$PATH''${PATH:+:}$fakeRustup
+    export RUST_SRC_PATH=${rustPlatform.rustcSrc}
+  '';
+
+  meta = with stdenv.lib; {
+    description = "An experimental modular compiler frontend for the Rust language";
+    homepage = "https://github.com/rust-analyzer/rust-analyzer";
+    license = with licenses; [ mit asl20 ];
+    maintainers = with maintainers; [ oxalica ];
+    platforms = platforms.all;
+  };
+}
diff --git a/pkgs/development/tools/rust/rust-analyzer/update.sh b/pkgs/development/tools/rust/rust-analyzer/update.sh
new file mode 100755
index 000000000000..da4dfc029161
--- /dev/null
+++ b/pkgs/development/tools/rust/rust-analyzer/update.sh
@@ -0,0 +1,39 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p curl jq nix-prefetch-github
+set -euo pipefail
+cd "$(dirname "$0")"
+owner=rust-analyzer
+repo=rust-analyzer
+nixpkgs=../../../../..
+
+# Update lsp
+
+rev=$(
+    curl -s "https://api.github.com/repos/$owner/$repo/releases" |
+    jq 'map(select(.prerelease | not)) | .[0].tag_name' --raw-output
+)
+old_rev=$(sed -nE 's/.*\brev = "(.*)".*/\1/p' ./default.nix)
+if grep -q '0000000000000000000000000000000000000000000000000000' ./default.nix; then
+    old_rev='broken'
+fi
+if [[ "$rev" == "$old_rev" ]]; then
+    echo "Up to date: $rev"
+    exit
+fi
+echo "$old_rev -> $rev"
+
+sha256=$(nix-prefetch-github --prefetch "$owner" "$repo" --rev "$rev" | jq '.sha256' --raw-output)
+sed -e "s/rev = \".*\"/rev = \"$rev\"/" \
+    -e "s/sha256 = \".*\"/sha256 = \"$sha256\"/" \
+    -e "s/cargoSha256 = \".*\"/cargoSha256 = \"0000000000000000000000000000000000000000000000000000\"/" \
+    --in-place ./default.nix
+
+echo "Prebuilding nix"
+cargo_sha256=$({
+    ! nix-build "$nixpkgs" -A rust-analyzer-unwrapped --no-out-link 2>&1
+} | tee /dev/stderr | sed -nE 's/\s*got:\s*sha256:(\w+)/\1/p' | head -n1)
+echo "cargoSha256: $cargo_sha256"
+[[ "$cargo_sha256" ]]
+sed "s/cargoSha256 = \".*\"/cargoSha256 = \"$cargo_sha256\"/" \
+    --in-place ./default.nix
+
diff --git a/pkgs/development/tools/rust/rust-analyzer/wrapper.nix b/pkgs/development/tools/rust/rust-analyzer/wrapper.nix
new file mode 100644
index 000000000000..8ca3ff1a6d20
--- /dev/null
+++ b/pkgs/development/tools/rust/rust-analyzer/wrapper.nix
@@ -0,0 +1,16 @@
+{ lib, rustPlatform, runCommandNoCC, makeWrapper }:
+
+lib.makeOverridable ({
+  unwrapped,
+  pname ? "rust-analyzer",
+  version ? unwrapped.version,
+  rustcSrc ? rustPlatform.rustcSrc,
+}: runCommandNoCC "${pname}-${version}" {
+  inherit pname version;
+  inherit (unwrapped) src meta;
+  nativeBuildInputs = [ makeWrapper ];
+} ''
+  mkdir -p $out/bin
+  makeWrapper ${unwrapped}/bin/rust-analyzer $out/bin/rust-analyzer \
+    --set-default RUST_SRC_PATH "${rustcSrc}"
+'')
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 5574d0cc76aa..ad9664ec7dcd 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -8904,6 +8904,8 @@ in
     inherit (rustPackages_1_38_0) rustPlatform;
     inherit (darwin.apple_sdk.frameworks) Security;
   };
+  inherit (callPackage ../development/tools/rust/rust-analyzer { })
+    rust-analyzer-unwrapped rust-analyzer;
   rust-bindgen = callPackage ../development/tools/rust/bindgen { };
   rust-cbindgen = callPackage ../development/tools/rust/cbindgen {
     inherit (darwin.apple_sdk.frameworks) Security;