fix: nvim: julials add generation of precompile head & add readme

bin/neovim/add_dependencies.jl

@@ -1,6 +1,7 @@
 # Add dependencies to Language Server project
 # TODO: automatically list up necessary packages
 using Pkg
+@info "project path" Pkg.project().path
 
 # add LanguageServer.jl
 Pkg.add("LanguageServer")
@@ -11,5 +12,18 @@ pkg_ls_deps = Pkg.dependencies()[pkg_ls].dependencies |> keys
 foreach(Pkg.add, pkg_ls_deps)
 
 # add extra dependencies
-foreach(Pkg.add, ["Logging", "Sockets", "DataStructures"]) # these packages are manually collected
+# these packages are manually collected
+pkg_extra = ["Logging", "Sockets", "DataStructures", "Tar", "ArgTools"]
+foreach(Pkg.add, pkg_extra)
+@info "dependency added"
+
+# save pkgs to be used for precompile functions with traced script
+out_path = joinpath(Pkg.project().path |> dirname, "precompile_exec_head.jl")
+@info "writing $(out_path)"
+open(out_path, "w") do io
+    println(io, "using LanguageServer")
+    println(io, "using " * join(pkg_ls_deps, ", "))
+    println(io, "using " * join(pkg_extra, ", "))
+end
+@info "finished writing precompile head file"
 

bin/neovim/readme.md

@@ -0,0 +1,27 @@
+# How to manage Julia Language Server
+This config use sysimage built with PackageCompiler to make language server startup faster.
+Scripts in this directory is for management of sysimage.
+
+# description
+all related process is done in project at `~/.julia/environments/nvim-lspconfig/`.
+
+## startup
+```sh
+$ ./setup_julials.sh
+```
+which executes `add_dependencies.jl` internally.
+
+## update
+```sh
+$ ./update_julials.sh
+```
+which updates project, compile sysimage, then do precompile.
+
+# effect
+Start up got about x3 - x4 faster.
+It still takes some time to load packages though.
+
+# TODO
+- [ ] Not sure all necessary packages are listed in add_dependencies.jl
+- [ ] Maybe it's better to set up different sysimages for each projects
+