[LIGO-25] Chores (add Makefile, scripts, vendor, stylish)

Problem: We need to add stylish config to settle code style for our
project. Makefile to simplify its building. Also we need to check
our project for trailing whitespaces so we need to add the corresponding
script to be used later in CI.

Solution:
Add
  - stylish-haskell config
  - Makefile
  - `check_trailing_whitespace` script

tools/lsp/README.md

@@ -20,8 +20,8 @@ Right now only one parser is linked there; the name of symlink should be changed
 in future.
 
 Server part invokes the TS-parser and then constructs a tree of haskell datatypes
-from the TS-tree. Then it is fed into `AST.Parser` (name will be changed), which
-constructs an universal AST from the tree of the respective language.
+from the TS-tree. Then it is fed into `LIGO.Parser` (name will be changed), which
+constructs an universal LIGO from the tree of the respective language.
 
 Parser uses the root `Parser` module which provides the combinators and monad
 to deal with `ParseTree`, produced from TS output.

tools/lsp/squirrel/.stylish-haskell.yaml

@@ -0,0 +1,66 @@
+# SPDX-FileCopyrightText: 2019 Serokell <https://serokell.io>
+#
+# SPDX-License-Identifier: Unlicense
+
+# Default stylish-haskell config used in Serokell.
+
+steps:
+  - simple_align:
+      cases: false
+      top_level_patterns: false
+      records: false
+  - imports:
+      align: none
+      list_align: after_alias
+      pad_module_names: false
+      long_list_align: new_line
+      empty_list_align: inherit
+      list_padding: 2
+      separate_lists: true
+      space_surround: false
+  - language_pragmas:
+      style: compact
+      remove_redundant: true
+  - trailing_whitespace: {}
+columns: 100
+newline: native
+language_extensions:
+  - BangPatterns
+  - BlockArguments
+  - ConstraintKinds
+  - DataKinds
+  - DefaultSignatures
+  - DeriveAnyClass
+  - DeriveDataTypeable
+  - DeriveGeneric
+  - DerivingStrategies
+  - DerivingVia
+  - EmptyCase
+  - ExistentialQuantification
+  - ExplicitNamespaces
+  - FlexibleContexts
+  - FlexibleInstances
+  - FunctionalDependencies
+  - GADTs
+  - GeneralizedNewtypeDeriving
+  - LambdaCase
+  - MultiParamTypeClasses
+  - MultiWayIf
+  - NamedFieldPuns
+  - NoImplicitPrelude
+  - OverloadedLabels
+  - OverloadedStrings
+  - PatternSynonyms
+  - RebindableSyntax
+  - RecordWildCards
+  - RecursiveDo
+  - ScopedTypeVariables
+  - StandaloneDeriving
+  - TemplateHaskell
+  - TemplateHaskellQuotes
+  - TupleSections
+  - TypeApplications
+  - TypeFamilies
+  - TypeOperators
+  - ViewPatterns
+  - QuasiQuotes

tools/lsp/squirrel/Makefile

@@ -0,0 +1,30 @@
+SITTER ?= tree-sitter
+
+DIRS := grammar/pascaligo grammar/reasonligo grammar/camligo
+
+PACKAGE := squirrel
+
+STACK_DEV_OPTIONS = --fast --ghc-options -Wwarn --file-watch
+
+.DEFAULT_GOAL := all
+
+all: build
+
+FORCE:
+
+generate: $(DIRS)
+
+$(DIRS): FORCE
+	# $(SITTER) generate # Generation is manual for now
+	mkdir -p $(PACKAGE)/vendor/$@
+	cp $@/src/parser.c vendor/$@/parser.c
+	cp -r $@/src/tree_sitter vendor/$@/tree_sitter
+
+clean:
+	$(RM) vendor/*
+	stack clean
+
+build:
+	stack build $(STACK_DEV_OPTIONS)
+
+.PHONY: all clean generate build FORCE

tools/lsp/squirrel/package.yaml

@@ -57,10 +57,12 @@ library:
     - src/
 
   include-dirs:
-    - vendor
+    - vendor/pascaligo
+    - vendor/reasonligo
 
   c-sources:
-    - vendor/parser.c
+    - vendor/pascaligo/parser.c
+    - vendor/reasonligo/parser.c
 
 executables:
   squirrel:
@@ -77,4 +79,6 @@ executables:
     source-dirs:
       - app/
 
-    ghc-options: -threaded
+    ghc-options:
+      - -threaded
+      - -Wall

tools/lsp/squirrel/scripts/check-trailing-whitespace.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+
+# SPDX-FileCopyrightText: 2020 Tocqueville Group
+#
+# SPDX-License-Identifier: LicenseRef-MIT-TQ
+
+files=$(git ls-files | xargs grep --files-with-matches --binary-files=without-match '[[:blank:]]$')
+if [[ -n $files ]];then
+  echo '  Files with trailing whitespace found:'
+  for f in "${files[@]}"; do
+    echo "  * $f"
+  done
+  exit 1
+fi