nixpkgs/pkgs/development/tools/rust/rust-analyzer/update.sh

#!/usr/bin/env nix-shell
#!nix-shell -i bash -p curl jq nix-prefetch libarchive
set -euo pipefail
cd "$(dirname "$0")"
owner=rust-analyzer
repo=rust-analyzer
nixpkgs=../../../../..

# Update lsp

ver=$(
    curl -s "https://api.github.com/repos/$owner/$repo/releases" |
    jq 'map(select(.prerelease | not)) | .[0].tag_name' --raw-output
)
old_ver=$(sed -nE 's/.*\bversion = "(.*)".*/\1/p' ./default.nix)
if grep -q 'cargoSha256 = ""' ./default.nix; then
    old_ver='broken'
fi
if [[ "$ver" == "$old_ver" ]]; then
    echo "Up to date: $ver"
    exit
fi
echo "$old_ver -> $ver"

sha256=$(nix-prefetch -f "$nixpkgs" rust-analyzer-unwrapped.src --rev "$ver")
# Clear cargoSha256 to avoid inconsistency.
sed -e "s#version = \".*\"#version = \"$ver\"#" \
    -e "/fetchFromGitHub/,/}/ s#sha256 = \".*\"#sha256 = \"$sha256\"#" \
    -e "s#cargoSha256 = \".*\"#cargoSha256 = \"sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=\"#" \
    --in-place ./default.nix
node_src="$(nix-build "$nixpkgs" -A rust-analyzer.src --no-out-link)/editors/code"

# Check vscode compatibility
req_vscode_ver="$(jq '.engines.vscode' "$node_src/package.json" --raw-output)"
req_vscode_ver="${req_vscode_ver#^}"
cur_vscode_ver="$(nix-instantiate --eval --strict "$nixpkgs" -A vscode.version | tr -d '"')"
if [[ "$(nix-instantiate --eval --strict -E "(builtins.compareVersions \"$req_vscode_ver\" \"$cur_vscode_ver\")")" -gt 0 ]]; then
    echo "vscode $cur_vscode_ver is incompatible with the extension requiring ^$req_vscode_ver"
    exit 1
fi

echo "Prebuilding for cargoSha256"
cargo_sha256=$(nix-prefetch "{ sha256 }: (import $nixpkgs {}).rust-analyzer-unwrapped.cargoDeps.overrideAttrs (_: { outputHash = sha256; })")
sed "s#cargoSha256 = \".*\"#cargoSha256 = \"$cargo_sha256\"#" \
    --in-place ./default.nix

# Update vscode extension

extension_ver=$(curl "https://github.com/rust-analyzer/rust-analyzer/releases/download/$ver/rust-analyzer.vsix" -L |
    bsdtar -xf - --to-stdout extension/package.json | # Use bsdtar to extract vsix(zip).
    jq --raw-output '.version')
echo "Extension version: $extension_ver"

build_deps="../../../../misc/vscode-extensions/rust-analyzer/build-deps"
# We need devDependencies to build vsix.
# `esbuild` is a binary package an is already in nixpkgs so we omit it here.
jq '{ name, version: $ver, dependencies: (.dependencies + .devDependencies | del(.esbuild)) }' "$node_src/package.json" \
    --arg ver "$extension_ver" \
    >"$build_deps/package.json.new"

old_deps="$(jq '.dependencies' "$build_deps"/package.json)"
new_deps="$(jq '.dependencies' "$build_deps"/package.json.new)"
if [[ "$old_deps" == "$new_deps" ]]; then
    echo "package.json dependencies not changed, do simple version change"

    sed -E '/^  "rust-analyzer-build-deps/,+3 s/version = ".*"/version = "'"$extension_ver"'"/' \
        --in-place ../../../node-packages/node-packages.nix
    mv "$build_deps"/package.json{.new,}

else
    echo "package.json dependencies changed, updating nodePackages"
    mv "$build_deps"/package.json{.new,}

    pushd "../../../node-packages"
    ./generate.sh
    popd
fi