14 files changed, 854 insertions, 0 deletions
diff --git a/lua/user/core/autopairs.lua b/lua/user/core/autopairs.lua
new file mode 100644
index 0000000..96be89e
--- /dev/null
+++ b/lua/user/core/autopairs.lua
@@ -0,0 +1,34 @@
+-- Setup nvim-cmp.
+local status_ok, npairs = pcall(require, "nvim-autopairs")
+if not status_ok then
+  print "nvim-autopairs init failed"
+  return
+end
+
+npairs.setup {
+  check_ts = true,
+  ts_config = {
+    lua = { "string", "source" },
+    javascript = { "string", "template_string" },
+    java = false,
+  },
+  disable_filetype = { "TelescopePrompt", "spectre_panel" },
+  fast_wrap = {
+    map = "<M-e>",
+    chars = { "{", "[", "(", '"', "'" },
+    pattern = string.gsub([[ [%'%"%)%>%]%)%}%,] ]], "%s+", ""),
+    offset = 0, -- Offset from pattern match
+    end_key = "$",
+    keys = "qwertyuiopzxcvbnmasdfghjkl",
+    check_comma = true,
+    highlight = "PmenuSel",
+    highlight_grey = "LineNr",
+  },
+}
+
+local cmp_autopairs = require "nvim-autopairs.completion.cmp"
+local cmp_status_ok, cmp = pcall(require, "cmp")
+if not cmp_status_ok then
+  return
+end
+cmp.event:on("confirm_done", cmp_autopairs.on_confirm_done { map_char = { tex = "" } })
diff --git a/lua/user/core/bufferline.lua b/lua/user/core/bufferline.lua
new file mode 100644
index 0000000..92ab513
--- /dev/null
+++ b/lua/user/core/bufferline.lua
@@ -0,0 +1,170 @@
+local status_ok, bufferline = pcall(require, "bufferline")
+if not status_ok then
+  print "bufferline init failed"
+  return
+end
+
+bufferline.setup {
+  options = {
+    numbers = "ordinal", -- "none" | "ordinal" | "buffer_id" | "both" | function({ ordinal, id, lower, raise }): string,
+    close_command = "Bdelete! %d", -- can be a string | function, see "Mouse actions"
+    right_mouse_command = "Bdelete! %d", -- can be a string | function, see "Mouse actions"
+    left_mouse_command = "buffer %d", -- can be a string | function, see "Mouse actions"
+    middle_mouse_command = nil, -- can be a string | function, see "Mouse actions"
+    -- NOTE: this plugin is designed with this icon in mind,
+    -- and so changing this is NOT recommended, this is intended
+    -- as an escape hatch for people who cannot bear it for whatever reason
+    indicator = {
+      style = 'icon',
+      icon = "▎",
+    },
+    buffer_close_icon = "",
+    -- buffer_close_icon = '',
+    modified_icon = "●",
+    close_icon = "",
+    -- close_icon = '',
+    left_trunc_marker = "",
+    right_trunc_marker = "",
+    --- name_formatter can be used to change the buffer's label in the bufferline.
+    --- Please note some names can/will break the
+    --- bufferline so use this at your discretion knowing that it has
+    --- some limitations that will *NOT* be fixed.
+    -- name_formatter = function(buf)  -- buf contains a "name", "path" and "bufnr"
+    --   -- remove extension from markdown files for example
+    --   if buf.name:match('%.md') then
+    --     return vim.fn.fnamemodify(buf.name, ':t:r')
+    --   end
+    -- end,
+    max_name_length = 30,
+    max_prefix_length = 30, -- prefix used when a buffer is de-duplicated
+    tab_size = 21,
+    diagnostics = true, -- | "nvim_lsp" | "coc",
+    diagnostics_update_in_insert = false,
+    -- diagnostics_indicator = function(count, level, diagnostics_dict, context)
+    --   return "("..count..")"
+    -- end,
+    -- NOTE: this will be called a lot so don't do any heavy processing here
+    -- custom_filter = function(buf_number)
+    --   -- filter out filetypes you don't want to see
+    --   if vim.bo[buf_number].filetype ~= "<i-dont-want-to-see-this>" then
+    --     return true
+    --   end
+    --   -- filter out by buffer name
+    --   if vim.fn.bufname(buf_number) ~= "<buffer-name-I-dont-want>" then
+    --     return true
+    --   end
+    --   -- filter out based on arbitrary rules
+    --   -- e.g. filter out vim wiki buffer from tabline in your work repo
+    --   if vim.fn.getcwd() == "<work-repo>" and vim.bo[buf_number].filetype ~= "wiki" then
+    --     return true
+    --   end
+    -- end,
+    offsets = { { filetype = "NvimTree", text = "", padding = 1 } },
+    show_buffer_icons = true,
+    show_buffer_close_icons = true,
+    show_close_icon = true,
+    show_tab_indicators = true,
+    persist_buffer_sort = true, -- whether or not custom sorted buffers should persist
+    -- can also be a table containing 2 custom separators
+    -- [focused and unfocused]. eg: { '|', '|' }
+    separator_style = "thin", -- | "thick" | "thin" | { 'any', 'any' },
+    enforce_regular_tabs = true,
+    always_show_bufferline = true,
+    -- sort_by = 'id' | 'extension' | 'relative_directory' | 'directory' | 'tabs' | function(buffer_a, buffer_b)
+    --   -- add custom logic
+    --   return buffer_a.modified > buffer_b.modified
+    -- end
+  },
+  highlights = {
+    fill = {
+      fg = { attribute = "fg", highlight = "#ff0000" },
+      bg = { attribute = "bg", highlight = "TabLine" },
+    },
+    background = {
+      fg = { attribute = "fg", highlight = "TabLine" },
+      bg = { attribute = "bg", highlight = "TabLine" },
+    },
+
+    buffer_selected = {
+      fg = {attribute='fg',highlight='#ff0000'},
+      bg = "#707070", --{attribute='bg',highlight='#0000ff'},
+      },
+    buffer_visible = {
+      fg = { attribute = "fg", highlight = "TabLine" },
+      bg = { attribute = "bg", highlight = "TabLine" },
+    },
+
+    close_button = {
+      fg = { attribute = "fg", highlight = "TabLine" },
+      bg = { attribute = "bg", highlight = "TabLine" },
+    },
+    close_button_visible = {
+      fg = { attribute = "fg", highlight = "TabLine" },
+      bg = { attribute = "bg", highlight = "TabLine" },
+    },
+    -- close_button_selected = {
+    --   fg = {attribute='fg',highlight='TabLineSel'},
+    --   bg ={attribute='bg',highlight='TabLineSel'}
+    --   },
+
+    tab_selected = {
+      fg = { attribute = "fg", highlight = "Normal" },
+      bg = { attribute = "bg", highlight = "Normal" },
+    },
+    tab = {
+      fg = { attribute = "fg", highlight = "TabLine" },
+      bg = { attribute = "bg", highlight = "TabLine" },
+    },
+    tab_close = {
+      -- fg = {attribute='fg',highlight='LspDiagnosticsDefaultError'},
+      fg = { attribute = "fg", highlight = "TabLineSel" },
+      bg = { attribute = "bg", highlight = "Normal" },
+    },
+
+    duplicate_selected = {
+      fg = { attribute = "fg", highlight = "TabLineSel" },
+      bg = { attribute = "bg", highlight = "TabLineSel" },
+      italic = true,
+    },
+    duplicate_visible = {
+      fg = { attribute = "fg", highlight = "TabLine" },
+      bg = { attribute = "bg", highlight = "TabLine" },
+      italic = true,
+    },
+    duplicate = {
+      fg = { attribute = "fg", highlight = "TabLine" },
+      bg = { attribute = "bg", highlight = "TabLine" },
+      italic = true,
+    },
+
+    modified = {
+      fg = { attribute = "fg", highlight = "TabLine" },
+      bg = { attribute = "bg", highlight = "TabLine" },
+    },
+    modified_selected = {
+      fg = { attribute = "fg", highlight = "Normal" },
+      bg = { attribute = "bg", highlight = "Normal" },
+    },
+    modified_visible = {
+      fg = { attribute = "fg", highlight = "TabLine" },
+      bg = { attribute = "bg", highlight = "TabLine" },
+    },
+
+    separator = {
+      fg = { attribute = "bg", highlight = "TabLine" },
+      bg = { attribute = "bg", highlight = "TabLine" },
+    },
+    separator_selected = {
+      fg = { attribute = "bg", highlight = "Normal" },
+      bg = { attribute = "bg", highlight = "Normal" },
+    },
+    -- separator_visible = {
+    --   fg = {attribute='bg',highlight='TabLine'},
+    --   bg = {attribute='bg',highlight='TabLine'}
+    --   },
+    indicator_selected = {
+      fg = { attribute = "fg", highlight = "LspDiagnosticsDefaultHint" },
+      bg = { attribute = "bg", highlight = "Normal" },
+    },
+  },
+}
diff --git a/lua/user/core/cmp.lua b/lua/user/core/cmp.lua
new file mode 100644
index 0000000..ff6a97e
--- /dev/null
+++ b/lua/user/core/cmp.lua
@@ -0,0 +1,133 @@
+local cmp_status_ok, cmp = pcall(require, "cmp")
+if not cmp_status_ok then
+  print "cmp init failed"
+  return
+end
+
+local snip_status_ok, luasnip = pcall(require, "luasnip")
+if not snip_status_ok then
+  return
+end
+require("luasnip/loaders/from_vscode").lazy_load()
+
+local check_backspace = function()
+  local col = vim.fn.col "." - 1
+  return col == 0 or vim.fn.getline("."):sub(col, col):match "%s"
+end
+
+--   פּ ﯟ   some other good icons
+local kind_icons = {
+  Text = "",
+  Method = "m",
+  Function = "",
+  Constructor = "",
+  Field = "",
+  Variable = "",
+  Class = "",
+  Interface = "",
+  Module = "",
+  Property = "",
+  Unit = "",
+  Value = "",
+  Enum = "",
+  Keyword = "",
+  Snippet = "",
+  Color = "",
+  File = "",
+  Reference = "",
+  Folder = "",
+  EnumMember = "",
+  Constant = "",
+  Struct = "",
+  Event = "",
+  Operator = "",
+  TypeParameter = "",
+}
+-- find more here: https://www.nerdfonts.com/cheat-sheet
+
+cmp.setup {
+   completion = {
+    autocomplete = false, -- see init.lua : debounce
+  },
+  snippet = {
+    expand = function(args)
+      luasnip.lsp_expand(args.body) -- For `luasnip` users.
+    end,
+  },
+  mapping = {
+    ["<A-s>"] = cmp.mapping.select_prev_item(),
+    ["<A-t>"] = cmp.mapping.select_next_item(),
+    ["<A-c>"] = cmp.mapping(cmp.mapping.scroll_docs(-1), { "i", "c" }),
+    ["<A-r>"] = cmp.mapping(cmp.mapping.scroll_docs(1), { "i", "c" }),
+    ["<A-Space>"] = cmp.mapping(cmp.mapping.complete(), { "i", "c" }),
+    ["<A-y>"] = cmp.config.disable, -- Specify `cmp.config.disable` if you want to remove the default `<C-y>` mapping.
+    ["<A-e>"] = cmp.mapping {
+      i = cmp.mapping.abort(),
+      c = cmp.mapping.close(),
+    },
+    -- Accept currently selected item. If none selected, `select` first item.
+    -- Set `select` to `false` to only confirm explicitly selected items.
+    ["<CR>"] = cmp.mapping.confirm { select = true },
+    ["<Tab>"] = cmp.mapping(function(fallback)
+      if cmp.visible() then
+        cmp.select_next_item()
+      elseif luasnip.expandable() then
+        luasnip.expand()
+      elseif luasnip.expand_or_jumpable() then
+        luasnip.expand_or_jump()
+      elseif check_backspace() then
+        fallback()
+      else
+        fallback()
+      end
+    end, {
+      "i",
+      "s",
+    }),
+    ["<S-Tab>"] = cmp.mapping(function(fallback)
+      if cmp.visible() then
+        cmp.select_prev_item()
+      elseif luasnip.jumpable(-1) then
+        luasnip.jump(-1)
+      else
+        fallback()
+      end
+    end, {
+      "i",
+      "s",
+    }),
+  },
+  formatting = {
+    fields = { "kind", "abbr", "menu" },
+    format = function(entry, vim_item)
+      -- Kind icons
+      vim_item.kind = string.format("%s", kind_icons[vim_item.kind])
+      -- vim_item.kind = string.format('%s %s', kind_icons[vim_item.kind], vim_item.kind) -- This concatonates the icons with the name of the item kind
+      vim_item.menu = ({
+        nvim_lsp = "[LSP]",
+        luasnip = "[Snippet]",
+        buffer = "[Buffer]",
+        path = "[Path]",
+      })[entry.source.name]
+      return vim_item
+    end,
+  },
+  -- SEE : https://github.com/hrsh7th/nvim-cmp#where-can-i-find-more-completion-sources
+  sources = {
+    { name = "nvim_lsp" },
+    { name = "luasnip" },
+    { name = "buffer" },
+    { name = "path" },
+  },
+  confirm_opts = {
+    behavior = cmp.ConfirmBehavior.Replace,
+    select = false,
+  },
+  window = {
+    documentation = "native",
+  },
+  experimental = {
+    ghost_text = true,    -- grey autosuggestion
+    native_menu = false,
+  },
+}
diff --git a/lua/user/core/comment.lua b/lua/user/core/comment.lua
new file mode 100644
index 0000000..7d36862
--- /dev/null
+++ b/lua/user/core/comment.lua
@@ -0,0 +1,24 @@
+local status_ok, comment = pcall(require, "Comment")
+if not status_ok then
+  print "Comment init failed"
+  return
+end
+
+comment.setup {
+  pre_hook = function(ctx)
+    local U = require "Comment.utils"
+
+    local location = nil
+    if ctx.ctype == U.ctype.block then
+      location = require("ts_context_commentstring.utils").get_cursor_location()
+    elseif ctx.cmotion == U.cmotion.v or ctx.cmotion == U.cmotion.V then
+      location = require("ts_context_commentstring.utils").get_visual_start_location()
+    end
+
+    return require("ts_context_commentstring.internal").calculate_commentstring {
+      key = ctx.ctype == U.ctype.line and "__default" or "__multiline",
+      location = location,
+    }
+    end,
+}
+
diff --git a/lua/user/core/gitsigns.lua b/lua/user/core/gitsigns.lua
new file mode 100644
index 0000000..ca88cdf
--- /dev/null
+++ b/lua/user/core/gitsigns.lua
@@ -0,0 +1,49 @@
+local status_ok, gitsigns = pcall(require, "gitsigns")
+if not status_ok then
+  print "gitsigns init failed"
+  return
+end
+
+gitsigns.setup {
+  signs = {
+    add = { hl = "GitSignsAdd", text = "▎", numhl = "GitSignsAddNr", linehl = "GitSignsAddLn" },
+    change = { hl = "GitSignsChange", text = "▎", numhl = "GitSignsChangeNr", linehl = "GitSignsChangeLn" },
+    delete = { hl = "GitSignsDelete", text = "契", numhl = "GitSignsDeleteNr", linehl = "GitSignsDeleteLn" },
+    topdelete = { hl = "GitSignsDelete", text = "契", numhl = "GitSignsDeleteNr", linehl = "GitSignsDeleteLn" },
+    changedelete = { hl = "GitSignsChange", text = "▎", numhl = "GitSignsChangeNr", linehl = "GitSignsChangeLn" },
+  },
+  signcolumn = true,  -- Toggle with `:Gitsigns toggle_signs`
+  numhl = false,      -- Toggle with `:Gitsigns toggle_numhl`
+  linehl = false,     -- Toggle with `:Gitsigns toggle_linehl`
+  word_diff = false,  -- Toggle with `:Gitsigns toggle_word_diff`
+  watch_gitdir = {
+    interval = 1000,
+    follow_files = true,
+  },
+  attach_to_untracked = true,
+  current_line_blame = false, -- Toggle with `:Gitsigns toggle_current_line_blame`
+  current_line_blame_opts = {
+    virt_text = true,
+    virt_text_pos = "eol", -- 'eol' | 'overlay' | 'right_align'
+    delay = 1000,
+    ignore_whitespace = false,
+  },
+  current_line_blame_formatter_opts = {
+    relative_time = false,
+  },
+  sign_priority = 6,
+  update_debounce = 100,
+  status_formatter = nil, -- Use default
+  max_file_length = 40000,
+  preview_config = {
+    -- Options passed to nvim_open_win
+    border = "single",
+    style = "minimal",
+    relative = "cursor",
+    row = 0,
+    col = 1,
+  },
+  yadm = {
+    enable = false,
+  },
+}
diff --git a/lua/user/core/init.lua b/lua/user/core/init.lua
new file mode 100644
index 0000000..64d8e28
--- /dev/null
+++ b/lua/user/core/init.lua
@@ -0,0 +1,9 @@
+require 'user.core.autopairs'
+require 'user.core.bufferline'
+require 'user.core.cmp'
+require 'user.core.comment'
+require 'user.core.telescope'
+require 'user.core.treesitter'
+require 'user.core.gitsigns'
+require 'user.core.nvim-tree'
+require 'user.core.lsp'
diff --git a/lua/user/core/lsp/handlers.lua b/lua/user/core/lsp/handlers.lua
new file mode 100644
index 0000000..853beb3
--- /dev/null
+++ b/lua/user/core/lsp/handlers.lua
@@ -0,0 +1,94 @@
+local M = {}
+
+local cmp_nvim_ok, cmp_nvim_lsp = pcall(require, "cmp_nvim_lsp")
+if not cmp_nvim_ok then
+  print "cpm_nvim_lsp init failed"
+  return
+end
+
+M.setup = function()
+  local signs = { Error = "", Warn = "", Hint = "", Info = "" }
+  for type, icon in pairs(signs) do
+    local hl = "DiagnosticSign" .. type
+    vim.fn.sign_define(hl, { text = icon, texthl = hl, numhl = hl })
+  end
+
+  local config = {
+    -- disable virtual text
+    virtual_text = false,
+    -- show signs
+    signs = {
+      active = signs,
+    },
+    update_in_insert = false,
+    underline = true,
+    severity_sort = true,
+    float = {
+      focusable = false,
+      style = "minimal",
+      border = "rounded",
+      source = "always",
+      header = "",
+      prefix = "",
+    },
+  }
+
+  vim.diagnostic.config(config)
+
+  vim.lsp.handlers["textDocument/hover"] = vim.lsp.with(vim.lsp.handlers.hover, {
+    border = "rounded",
+  })
+
+  vim.lsp.handlers["textDocument/signatureHelp"] = vim.lsp.with(vim.lsp.handlers.signature_help, {
+    border = "rounded",
+  })
+end
+
+local function lsp_highlight(client)
+  -- Set autocommands conditional on server_capabilities
+  if client.server_capabilities.document_highlight then
+    vim.api.nvim_exec(
+      [[
+      augroup lsp_document_highlight
+        autocmd! * <buffer>
+        autocmd CursorHold <buffer> lua vim.lsp.buf.document_highlight()
+        autocmd CursorMoved <buffer> lua vim.lsp.buf.clear_references()
+      augroup END
+    ]],
+      false
+    )
+  end
+end
+
+local keymap = vim.keymap.set
+
+local function lsp_keymaps(bufnr)
+  local opts = { buffer = bufnr, noremap = true, silent = true }
+  -- SEE : https://neovim.io/doc/user/lsp.html
+  keymap("n", "gd", vim.lsp.buf.definition, opts)
+  keymap("n", "gr", vim.lsp.buf.references, opts)
+  keymap("n", "gi", vim.lsp.buf.implementation, opts)
+  keymap("n", "ga", vim.lsp.buf.declaration, opts)
+
+  keymap("n", "gb", vim.lsp.buf.hover, opts)
+  keymap("n", "gé", vim.lsp.buf.signature_help, opts)
+  keymap("n", "gk", vim.diagnostic.open_float, opts)
+  keymap("n", "g.", vim.diagnostic.goto_next, opts)
+  keymap("n", "gx", vim.diagnostic.goto_prev, opts)
+  keymap("n", "<leader>q", vim.diagnostic.setloclist, opts)
+  vim.cmd [[ command! Format execute 'lua vim.lsp.buf.formatting()' ]] -- FIXME what ?
+end
+
+M.on_attach = function(client, bufnr)
+  if client.name == "tsserver" then
+    client.server_capabilities.document_formatting = false
+  end
+  lsp_keymaps(bufnr)
+  lsp_highlight(client)
+end
+
+local capabilities = vim.lsp.protocol.make_client_capabilities()
+
+M.capabilities = cmp_nvim_lsp.default_capabilities(capabilities)
+
+return M
diff --git a/lua/user/core/lsp/init.lua b/lua/user/core/lsp/init.lua
new file mode 100644
index 0000000..a95a5ca
--- /dev/null
+++ b/lua/user/core/lsp/init.lua
@@ -0,0 +1,3 @@
+require 'user.core.lsp.mason'
+require('user.core.lsp.handlers').setup()
+require 'user.core.lsp.null-ls'
diff --git a/lua/user/core/lsp/mason.lua b/lua/user/core/lsp/mason.lua
new file mode 100644
index 0000000..9708ec8
--- /dev/null
+++ b/lua/user/core/lsp/mason.lua
@@ -0,0 +1,63 @@
+local mason_ok, mason = pcall(require, "mason")
+if not mason_ok then
+  print "mason init failed"
+  return
+end
+
+local mason_lspconfig_ok, mason_lspconfig = pcall(require, "mason-lspconfig")
+if not mason_lspconfig_ok then
+  print "mason-lspconfig init failed"
+  return
+end
+
+local lspconfig_ok, lspconfig = pcall(require, "lspconfig")
+if not lspconfig_ok then
+  print "lspconfig init failed"
+  return
+end
+
+require('lspconfig.ui.windows').default_options.border = 'rounded'
+
+local servers = {
+  "clangd",
+  "jdtls",
+  "jsonls",
+  "ltex",
+  "rust_analyzer",
+  "solargraph",
+  "sumneko_lua",
+}
+
+mason.setup({
+    ui = {
+        border = "single",
+        icons = {
+            package_installed = "✓",
+            package_pending = "➜",
+            package_uninstalled = "✗"
+        }
+    }
+})
+
+mason_lspconfig.setup({
+  ensure_installed = servers,
+})
+
+mason_lspconfig.setup_handlers({
+  function(server_name)
+    local opts = {
+      on_attach = require("user.core.lsp.handlers").on_attach,
+      capabilities = require("user.core.lsp.handlers").capabilities,
+      falgs = {
+        debounce_text_changes = 5000,
+      },
+    }
+
+    local require_ok, server = pcall(require, "user.core.lsp.settings." .. server_name)
+    if require_ok then
+      opts = vim.tbl_deep_extend("force", server, opts)
+    end
+
+    lspconfig[server_name].setup(opts)
+  end,
+})
diff --git a/lua/user/core/lsp/null-ls.lua b/lua/user/core/lsp/null-ls.lua
new file mode 100644
index 0000000..389e68f
--- /dev/null
+++ b/lua/user/core/lsp/null-ls.lua
@@ -0,0 +1,20 @@
+local null_ls_ok, null_ls = pcall(require, "null-ls")
+if not null_ls_ok then
+  print "null-ls init failed"
+  return
+end
+
+-- https://github.com/jose-elias-alvarez/null-ls.nvim/tree/main/lua/null-ls/builtins/formatting
+local formatting = null_ls.builtins.formatting
+-- https://github.com/jose-elias-alvarez/null-ls.nvim/tree/main/lua/null-ls/builtins/diagnostics
+local diagnostics = null_ls.builtins.diagnostics
+
+null_ls.setup({
+  debug = false,
+  sources = {
+    formatting.prettier.with({ extra_args = { "--no-semi", "--single-quote", "--jsx-single-quote" } }),
+    formatting.black.with({ extra_args = { "--fast" } }),
+    formatting.stylua,
+    -- diagnostics.flake8
+  },
+})
diff --git a/lua/user/core/lsp/settings/sumneko_lua.lua b/lua/user/core/lsp/settings/sumneko_lua.lua
new file mode 100644
index 0000000..d7e82b4
--- /dev/null
+++ b/lua/user/core/lsp/settings/sumneko_lua.lua
@@ -0,0 +1,16 @@
+return {
+  settings = {
+
+    Lua = {
+      diagnostics = {
+        globals = { "vim" }, -- teach about vim global variable
+      },
+      workspace = {
+        library = {
+          [vim.fn.expand("$VIMRUNTIME/lua")] = true,
+          [vim.fn.stdpath("config") .. "/lua"] = true,
+        },
+      },
+    },
+  },
+}
diff --git a/lua/user/core/nvim-tree.lua b/lua/user/core/nvim-tree.lua
new file mode 100644
index 0000000..d94da10
--- /dev/null
+++ b/lua/user/core/nvim-tree.lua
@@ -0,0 +1,112 @@
+-- following options are the default
+-- each of these are documented in `:help nvim-tree.OPTION_NAME`
+
+local status_ok, nvim_tree = pcall(require, "nvim-tree")
+if not status_ok then
+  return
+end
+
+local config_status_ok, nvim_tree_config = pcall(require, "nvim-tree.config")
+if not config_status_ok then
+  return
+end
+
+local tree_cb = nvim_tree_config.nvim_tree_callback
+
+nvim_tree.setup {
+  disable_netrw = true,
+  hijack_netrw = true,
+  open_on_setup = false,
+  ignore_ft_on_setup = { },
+  open_on_tab = false,
+  hijack_cursor = false,
+  update_cwd = true,
+  -- update_to_buf_dir = {
+  --   enable = true,
+  --   auto_open = true,
+  -- },
+  renderer = {
+    icons = {
+      glyphs = {
+        default = "",
+        symlink = "",
+        git = {
+          unstaged = "",
+          staged = "S",
+          unmerged = "",
+          renamed = "➜",
+          deleted = "",
+          untracked = "U",
+          ignored = "◌",
+        },
+        folder = {
+          default = "",
+          open = "",
+          empty = "",
+          empty_open = "",
+          symlink = "",
+        },
+      },
+    },
+  },
+  diagnostics = {
+    enable = true,
+    icons = {
+      hint = "",
+      info = "",
+      warning = "",
+      error = "",
+    },
+  },
+  update_focused_file = {
+    enable = true,
+    update_cwd = true,
+    ignore_list = {},
+  },
+  system_open = {
+    cmd = nil,
+    args = {},
+  },
+  filters = {
+    dotfiles = false,
+    custom = {},
+  },
+  git = {
+    enable = true,
+    ignore = true,
+    timeout = 500,
+  },
+  view = {
+    width = 30,
+    hide_root_folder = false,
+    side = "left",
+    -- auto_resize = true,
+    mappings = {
+      custom_only = false,
+      list = { -- see https://github.com/kyazdani42/nvim-tree.lua#keybindings
+        { key = { "l", "<CR>", "o" }, cb = tree_cb "edit" },
+        { key = "t", action = "next_sibling"},
+        { key = "s", action = "prev_sibling"},
+        { key = ">", action = "next_git_item"},
+        { key = "<", action = "prev_git_item"},
+      },
+    },
+    number = false,
+    relativenumber = false,
+  },
+  trash = {
+    cmd = "trash",
+    require_confirm = true,
+  },
+  -- quit_on_open = 0,
+  -- git_hl = 1,
+  -- disable_window_picker = 0,
+  -- root_folder_modifier = ":t",
+  -- show_icons = {
+  --   git = 1,
+  --   folders = 1,
+  --   files = 1,
+  --   folder_arrows = 1,
+  --   tree_width = 30,
+  -- },
+}
diff --git a/lua/user/core/telescope.lua b/lua/user/core/telescope.lua
new file mode 100644
index 0000000..86d1e51
--- /dev/null
+++ b/lua/user/core/telescope.lua
@@ -0,0 +1,97 @@
+local status_ok, telescope = pcall(require, "telescope")
+if not status_ok then
+  print "telescope init failed"
+  return
+end
+
+local actions = require "telescope.actions"
+
+telescope.setup {
+  defaults = {
+
+    prompt_prefix = " ",
+    selection_caret = " ",
+    path_display = { "smart" },
+
+    mappings = {
+      i = {
+        ["<C-n>"] = actions.cycle_history_next,
+        ["<C-p>"] = actions.cycle_history_prev,
+
+        ["<C-t>"] = actions.move_selection_next,
+        ["<C-s>"] = actions.move_selection_previous,
+
+        ["<C-c>"] = actions.close,
+
+        ["<Down>"] = actions.move_selection_next,
+        ["<Up>"] = actions.move_selection_previous,
+
+        ["<CR>"] = actions.select_default,
+        ["<C-x>"] = actions.select_horizontal,
+        ["<C-v>"] = actions.select_vertical,
+        ["<C-k>"] = actions.select_tab,
+
+        ["<C-u>"] = actions.preview_scrolling_up,
+        ["<C-d>"] = actions.preview_scrolling_down,
+
+        ["<PageUp>"] = actions.results_scrolling_up,
+        ["<PageDown>"] = actions.results_scrolling_down,
+
+        ["<Tab>"] = actions.toggle_selection + actions.move_selection_worse,
+        ["<S-Tab>"] = actions.toggle_selection + actions.move_selection_better,
+        ["<C-q>"] = actions.send_to_qflist + actions.open_qflist,
+        ["<M-q>"] = actions.send_selected_to_qflist + actions.open_qflist,
+        ["<C-l>"] = actions.complete_tag,
+        ["<C-_>"] = actions.which_key, -- keys from pressing <C-/>
+      },
+
+      n = {
+        ["<esc>"] = actions.close,
+        ["<CR>"] = actions.select_default,
+        ["<C-x>"] = actions.select_horizontal,
+        ["<C-v>"] = actions.select_vertical,
+        ["<C-k>"] = actions.select_tab,
+
+        ["<Tab>"] = actions.toggle_selection + actions.move_selection_worse,
+        ["<S-Tab>"] = actions.toggle_selection + actions.move_selection_better,
+        ["<C-q>"] = actions.send_to_qflist + actions.open_qflist,
+        ["<M-q>"] = actions.send_selected_to_qflist + actions.open_qflist,
+
+        ["j"] = actions.move_selection_next,
+        ["k"] = actions.move_selection_previous,
+        ["H"] = actions.move_to_top,
+        ["M"] = actions.move_to_middle,
+        ["L"] = actions.move_to_bottom,
+
+        ["<Down>"] = actions.move_selection_next,
+        ["<Up>"] = actions.move_selection_previous,
+        ["gg"] = actions.move_to_top,
+        ["G"] = actions.move_to_bottom,
+
+        ["<C-u>"] = actions.preview_scrolling_up,
+        ["<C-d>"] = actions.preview_scrolling_down,
+
+        ["<PageUp>"] = actions.results_scrolling_up,
+        ["<PageDown>"] = actions.results_scrolling_down,
+
+        ["?"] = actions.which_key,
+      },
+    },
+  },
+  pickers = {
+    -- Default configuration for builtin pickers goes here:
+    -- picker_name = {
+    --   picker_config_key = value,
+    --   ...
+    -- }
+    -- Now the picker_config_key will be applied every time you call this
+    -- builtin picker
+  },
+  extensions = {
+    -- Your extension configuration goes here:
+    -- extension_name = {
+    --   extension_config_key = value,
+    -- }
+    -- please take a look at the readme of the extension you want to configure
+  },
+}
diff --git a/lua/user/core/treesitter.lua b/lua/user/core/treesitter.lua
new file mode 100644
index 0000000..05d8fbf
--- /dev/null
+++ b/lua/user/core/treesitter.lua
@@ -0,0 +1,30 @@
+local status_ok, configs = pcall(require, "nvim-treesitter.configs")
+if not status_ok then
+  print "nvim-treesitter.configs init failed"
+  return
+end
+
+configs.setup {
+  ensure_installed = {"ruby"}, -- one of "all" or a list of languages
+  sync_install = false, -- install languages synchronously (only applied to `ensure_installed`)
+  ignore_install = { "" }, -- List of parsers to ignore installing
+  autopairs = {
+    enable = true,
+  },
+  highlight = {
+    enable = true, -- false will disable the whole extension
+    disable = { "" }, -- list of language that will be disabled
+    additional_vim_regex_highlighting = true,
+  },
+  indent = { enable = true, disable = { "yaml" } },
+  context_commentstring = { -- for nvim-ts-context-commentstring
+    enable = true,
+    enable_autocmd = false,
+  },
+  playground = {
+    enable = true,
+    },
+  rainbow = {
+    enable = true,
+    }
+}