snips/nvim.init.lua

-- Install packer
local install_path = vim.fn.stdpath 'data' .. '/site/pack/packer/start/packer.nvim'
local is_bootstrap = false
if vim.fn.empty(vim.fn.glob(install_path)) > 0 then
    is_bootstrap = true
    vim.fn.system({'git', 'clone', '--depth', '1', 'https://github.com/wbthomason/packer.nvim', install_path})
    vim.cmd [[packadd packer.nvim]]
end

require('packer').startup(function(use)
    -- Package manager
    use 'wbthomason/packer.nvim'

    -- Look and Colors
    use 'navarasu/onedark.nvim'
    use 'asolkar/vim-color-molokini'

    use {
        'nvim-lualine/lualine.nvim',
        requires = { 'kyazdani42/nvim-web-devicons', opt = true }
    }
    require('lualine').setup {
        options = {
            icons_enabled = true,
            theme = 'onedark',
            section_separators = { left = '', right = '' },
            component_separators = { left = '', right = '' }
        },
        sections = {
            lualine_c = {
                {
                    'filename',
                    path = 2,
                    symbols = {
                        modified = ' ●',        -- Text to show when the buffer is modified
                        alternate_file = ' ↻',  -- Text to show to identify the alternate file
                        directory =  '',       -- Text to show when the buffer is a directory
                    },
                }
            }
        },
        tabline = {
            lualine_a = {
            {
                'buffers',
                show_filename_only = true,   -- Shows shortened relative path when set to false.
                hide_filename_extension = false,   -- Hide filename extension when set to true.
                show_modified_status = true, -- Shows indicator when the buffer is modified.

                mode = 4, -- 0: Shows buffer name
                          -- 1: Shows buffer index
                          -- 2: Shows buffer name + buffer index
                          -- 3: Shows buffer number
                          -- 4: Shows buffer name + buffer number

                max_length = vim.o.columns * 2 / 3, -- Maximum width of buffers component,
                                                    -- it can also be a function that returns
                                                    -- the value of `max_length` dynamically.

                symbols = {
                    modified = ' ●',        -- Text to show when the buffer is modified
                    alternate_file = ' ↻',  -- Text to show to identify the alternate file
                    directory =  '',       -- Text to show when the buffer is a directory
                },
            }}
        }
    }

    -- Personal keymapping
    vim.api.nvim_set_keymap('n',    '<c-z>',        ':bn<CR>',          { noremap = 1 })
    vim.api.nvim_set_keymap('v',    '<c-z>',        ':bn<CR>',          { noremap = 1 })
    vim.api.nvim_set_keymap('n',    '<c-x>',        ':bp<CR>',          { noremap = 1 })
    vim.api.nvim_set_keymap('n',    '<F5>',         ':e<CR>',           { noremap = 1 })
    vim.api.nvim_set_keymap('n',    '<F6>',         '<C-W>w',           { noremap = 1 })
    vim.api.nvim_set_keymap('n',    '<F18>',        '<C-W>W',           { noremap = 1 }) -- S-F6 (F18 defined in ST's config.h)
    vim.api.nvim_set_keymap('n',    '<F7>',         '<C-W>o',           { noremap = 1 })
    vim.api.nvim_set_keymap('n',    '<F8>',         '<C-W>v',           { noremap = 1 })
    vim.api.nvim_set_keymap('n',    '<F20>',        '<C-W>s',           { noremap = 1 }) -- S-F8 (F20 defined in ST's config.h)
    vim.api.nvim_set_keymap('n',    '<F35>',        ':confirm bd<CR>',  { noremap = 1 }) -- C-F11 (F35 defined in ST's config.h)
    vim.api.nvim_set_keymap('v',    '<LeftRelease>','"*ygv',            { noremap = 1 }) -- Copy selection to clipboard
    vim.api.nvim_set_keymap('v',    '<2-LeftRelease>','"*ygv',          { noremap = 1 }) -- Copy word selection to clipboard
    vim.api.nvim_set_keymap('v',    '<3-LeftRelease>','"*ygv',          { noremap = 1 }) -- Copy line selection to clipboard
    vim.api.nvim_set_keymap('v',    '<4-LeftRelease>','"*ygv',          { noremap = 1 }) -- Copy column selection to clipboard
    vim.api.nvim_set_keymap('v',    '<c-r>',        '"hy/<C-r>h<cr>',   { noremap = 1 }) -- Search selected text
    vim.api.nvim_set_keymap('n',    '<c-Space>',    'za',               { noremap = 1 }) -- Toggle fold
    vim.api.nvim_set_keymap('v',    '<',            '<gv',              { noremap = 1 }) -- Preserve selection after left indent
    vim.api.nvim_set_keymap('v',    '>',            '>gv',              { noremap = 1 }) -- Preserve selection after right indent
    vim.api.nvim_set_keymap('v',    'Q',            'gqap',             { noremap = 1 }) -- Reflow visually highlighted lines with Q
    vim.api.nvim_set_keymap('n',    'Q',            'gq',               { noremap = 1 }) -- Reflow text

    -- Nerd Tree (File navigation)
    use 'preservim/nerdtree'
    vim.api.nvim_set_keymap('n', '<c-t>', ':NERDTreeToggle %<CR>', { noremap = 1 })
    vim.g.NERDTreeShowBookmarks     = 1
    vim.g.NERDTreeIgnore            = {'\\.py[cd]$', '\\~$', '\\.swo$', '\\.swp$',
                                       '^\\.git$', '^\\.hg$', '^\\.svn$', '\\.bzr$'}
    vim.g.NERDTreeChDirMode         = 3
    vim.g.NERDTreeQuitOnOpen        = 1
    vim.g.NERDTreeMouseMode         = 2
    vim.g.NERDTreeShowHidden        = 1
    vim.g.NERDTreeKeepTreeInNewTab  = 1
    vim.g.nerdtree_tabs_open_on_gui_startup = 0

    -- Indent and brackets
    use 'jiangmiao/auto-pairs'
    use 'luochen1990/rainbow'
    use 'tpope/vim-surround'
    use 'nathanaelkane/vim-indent-guides'

    use { -- LSP Configuration & Plugins
        'neovim/nvim-lspconfig',
        requires = {
            -- Automatically install LSPs to stdpath for neovim
            'williamboman/mason.nvim',
            'williamboman/mason-lspconfig.nvim',

            -- Useful status updates for LSP
            'j-hui/fidget.nvim',
        },
    }

    use { -- Autocompletion
        'hrsh7th/nvim-cmp',
        requires = { 'hrsh7th/cmp-nvim-lsp', 'L3MON4D3/LuaSnip', 'saadparwaiz1/cmp_luasnip' },
    }

    use { -- Highlight, edit, and navigate code
        'nvim-treesitter/nvim-treesitter',
        run = function()
            pcall(require('nvim-treesitter.install').update { with_sync = true })
        end,
    }

    use { -- Additional text objects via treesitter
        'nvim-treesitter/nvim-treesitter-textobjects',
        after = 'nvim-treesitter',
    }

    -- Git related plugins
    use 'tpope/vim-fugitive'
    use 'mhinz/vim-signify'
    use 'tpope/vim-rhubarb'
    use 'lewis6991/gitsigns.nvim'

    use 'mg979/vim-visual-multi'
    -- use 'lukas-reineke/indent-blankline.nvim' -- Add indentation guides even on blank lines
    use 'numToStr/Comment.nvim' -- "gc" to comment visual regions/lines
    use 'tpope/vim-sleuth' -- Detect tabstop and shiftwidth automatically

    -- Fuzzy Finder (files, lsp, etc)
    use { 'nvim-telescope/telescope.nvim', branch = '0.1.x', requires = { 'nvim-lua/plenary.nvim' } }

    -- Fuzzy Finder Algorithm which requires local dependencies to be built. Only load if `make` is available
    use { 'nvim-telescope/telescope-fzf-native.nvim', run = 'make', cond = vim.fn.executable 'make' == 1 }

    -- Add custom plugins to packer from ~/.config/nvim/lua/custom/plugins.lua
    local has_plugins, plugins = pcall(require, 'custom.plugins')
    if has_plugins then
        plugins(use)
    end

    if is_bootstrap then
        require('packer').sync()
    end
end)

-- When we are bootstrapping a configuration, it doesn't
-- make sense to execute the rest of the init.lua.
--
-- You'll need to restart nvim, and then it will work.
if is_bootstrap then
    print '=================================='
    print '    Plugins are being installed'
    print '    Wait until Packer completes,'
    print '       then restart nvim'
    print '=================================='
    return
end

-- Automatically source and re-compile packer whenever you save this init.lua
local packer_group = vim.api.nvim_create_augroup('Packer', { clear = true })
vim.api.nvim_create_autocmd('BufWritePost', {
    command = 'source <afile> | PackerCompile',
    group = packer_group,
    pattern = vim.fn.expand '$MYVIMRC',
})

-- [[ Setting options ]]
-- See `:help vim.o`

-- Set highlight on search
vim.o.hlsearch = true

-- Highlight problematic whitespace
vim.o.list = true
vim.opt.listchars = { tab = '▶ ', trail = '●', extends = '#', nbsp = '.' }

-- Make line numbers default
vim.wo.number = true

-- Enable mouse mode
vim.o.mouse = 'a'

-- Enable break indent
vim.o.breakindent = true

-- Save undo history
vim.o.undofile = true

-- Case insensitive searching UNLESS /C or capital in search
vim.o.ignorecase = true
vim.o.smartcase = true

-- Decrease update time
vim.o.updatetime = 250
vim.wo.signcolumn = 'yes'

-- Set colorscheme
vim.o.termguicolors = true
vim.cmd [[colorscheme onedark]]

-- Set completeopt to have a better completion experience
vim.o.completeopt = 'menuone,noselect'

-- Do not auto read file when in focus
vim.o.autoread = false

-- [[ Basic Keymaps ]]
-- Set <space> as the leader key
-- See `:help mapleader`
--    NOTE: Must happen before plugins are required (otherwise wrong leader will be used)
vim.g.mapleader = ','
vim.g.maplocalleader = ','

-- Keymaps for better default experience
-- See `:help vim.keymap.set()`
vim.keymap.set({ 'n', 'v' }, '<Space>', '<Nop>', { silent = true })

-- Remap for dealing with word wrap
vim.keymap.set('n', 'k', "v:count == 0 ? 'gk' : 'k'", { expr = true, silent = true })
vim.keymap.set('n', 'j', "v:count == 0 ? 'gj' : 'j'", { expr = true, silent = true })

-- [[ Highlight on yank ]]
-- See `:help vim.highlight.on_yank()`
local highlight_group = vim.api.nvim_create_augroup('YankHighlight', { clear = true })
vim.api.nvim_create_autocmd('TextYankPost', {
    callback = function()
        vim.highlight.on_yank()
    end,
    group = highlight_group,
    pattern = '*',
})

-- Enable Comment.nvim
require('Comment').setup()

-- Gitsigns
-- See `:help gitsigns.txt`
require('gitsigns').setup {
    signs = {
        add = { text = '+' },
        change = { text = '~' },
        delete = { text = '_' },
        topdelete = { text = '‾' },
        changedelete = { text = '~' },
    },
}

-- [[ Configure Telescope ]]
-- See `:help telescope` and `:help telescope.setup()`
require('telescope').setup {
    defaults = {
        mappings = {
            i = {
                ['<C-u>'] = false,
                ['<C-d>'] = false,
            },
        },
    },
}

-- Enable telescope fzf native, if installed
pcall(require('telescope').load_extension, 'fzf')

-- See `:help telescope.builtin`
vim.keymap.set('n', '<ldeader>?', require('telescope.builtin').oldfiles, { desc = '[?] Find recently opened files' })
vim.keymap.set('n', '<leader><space>', require('telescope.builtin').buffers, { desc = '[ ] Find existing buffers' })
vim.keymap.set('n', '<leader>/', function()
    -- You can pass additional configuration to telescope to change theme, layout, etc.
    require('telescope.builtin').current_buffer_fuzzy_find(require('telescope.themes').get_dropdown {
        winblend = 10,
        previewer = false,
    })
end, { desc = '[/] Fuzzily search in current buffer]' })

vim.keymap.set('n', '<leader>sf', require('telescope.builtin').find_files, { desc = '[S]earch [F]iles' })
vim.keymap.set('n', '<leader>sh', require('telescope.builtin').help_tags, { desc = '[S]earch [H]elp' })
vim.keymap.set('n', '<leader>sw', require('telescope.builtin').grep_string, { desc = '[S]earch current [W]ord' })
vim.keymap.set('n', '<leader>sg', require('telescope.builtin').live_grep, { desc = '[S]earch by [G]rep' })
vim.keymap.set('n', '<leader>sd', require('telescope.builtin').diagnostics, { desc = '[S]earch [D]iagnostics' })

-- [[ Configure Treesitter ]]
-- See `:help nvim-treesitter`
require('nvim-treesitter.configs').setup {
    -- Add languages to be installed here that you want installed for treesitter
    ensure_installed = { 'c', 'cpp', 'go', 'lua', 'python', 'rust', 'typescript', 'help', 'perl', 'ruby', 'verilog' },

    highlight = { enable = true },
    indent = { enable = true },
    incremental_selection = {
        enable = true,
        keymaps = {
            init_selection = '<c-space>',
            node_incremental = '<c-space>',
            scope_incremental = '<c-s>',
            node_decremental = '<c-backspace>',
        },
    },
    textobjects = {
        select = {
            enable = true,
            lookahead = true, -- Automatically jump forward to textobj, similar to targets.vim
            keymaps = {
                -- You can use the capture groups defined in textobjects.scm
                ['aa'] = '@parameter.outer',
                ['ia'] = '@parameter.inner',
                ['af'] = '@function.outer',
                ['if'] = '@function.inner',
                ['ac'] = '@class.outer',
                ['ic'] = '@class.inner',
            },
        },
        move = {
            enable = true,
            set_jumps = true, -- whether to set jumps in the jumplist
            goto_next_start = {
                [']m'] = '@function.outer',
                [']]'] = '@class.outer',
            },
            goto_next_end = {
                [']M'] = '@function.outer',
                [']['] = '@class.outer',
            },
            goto_previous_start = {
                ['[m'] = '@function.outer',
                ['[['] = '@class.outer',
            },
            goto_previous_end = {
                ['[M'] = '@function.outer',
                ['[]'] = '@class.outer',
            },
        },
        swap = {
            enable = true,
            swap_next = {
                ['<leader>a'] = '@parameter.inner',
            },
            swap_previous = {
                ['<leader>A'] = '@parameter.inner',
            },
        },
    },
}

-- Diagnostic keymaps
vim.keymap.set('n', '[d', vim.diagnostic.goto_prev)
vim.keymap.set('n', ']d', vim.diagnostic.goto_next)
vim.keymap.set('n', '<leader>e', vim.diagnostic.open_float)
vim.keymap.set('n', '<leader>q', vim.diagnostic.setloclist)

-- LSP settings.
--    This function gets run when an LSP connects to a particular buffer.
local on_attach = function(_, bufnr)
    -- NOTE: Remember that lua is a real programming language, and as such it is possible
    -- to define small helper and utility functions so you don't have to repeat yourself
    -- many times.
    --
    -- In this case, we create a function that lets us more easily define mappings specific
    -- for LSP related items. It sets the mode, buffer and description for us each time.
    local nmap = function(keys, func, desc)
        if desc then
            desc = 'LSP: ' .. desc
        end

        vim.keymap.set('n', keys, func, { buffer = bufnr, desc = desc })
    end

    nmap('<leader>rn', vim.lsp.buf.rename, '[R]e[n]ame')
    nmap('<leader>ca', vim.lsp.buf.code_action, '[C]ode [A]ction')

    nmap('gd', vim.lsp.buf.definition, '[G]oto [D]efinition')
    nmap('gr', require('telescope.builtin').lsp_references, '[G]oto [R]eferences')
    nmap('gI', vim.lsp.buf.implementation, '[G]oto [I]mplementation')
    nmap('<leader>D', vim.lsp.buf.type_definition, 'Type [D]efinition')
    nmap('<leader>ds', require('telescope.builtin').lsp_document_symbols, '[D]ocument [S]ymbols')
    nmap('<leader>ws', require('telescope.builtin').lsp_dynamic_workspace_symbols, '[W]orkspace [S]ymbols')

    -- See `:help K` for why this keymap
    nmap('K', vim.lsp.buf.hover, 'Hover Documentation')
    nmap('<C-k>', vim.lsp.buf.signature_help, 'Signature Documentation')

    -- Lesser used LSP functionality
    nmap('gD', vim.lsp.buf.declaration, '[G]oto [D]eclaration')
    nmap('<leader>wa', vim.lsp.buf.add_workspace_folder, '[W]orkspace [A]dd Folder')
    nmap('<leader>wr', vim.lsp.buf.remove_workspace_folder, '[W]orkspace [R]emove Folder')
    nmap('<leader>wl', function()
        print(vim.inspect(vim.lsp.buf.list_workspace_folders()))
    end, '[W]orkspace [L]ist Folders')

    -- Create a command `:Format` local to the LSP buffer
    vim.api.nvim_buf_create_user_command(bufnr, 'Format', function(_)
        if vim.lsp.buf.format then
            vim.lsp.buf.format()
        elseif vim.lsp.buf.formatting then
            vim.lsp.buf.formatting()
        end
    end, { desc = 'Format current buffer with LSP' })
end

-- Setup mason so it can manage external tooling
require('mason').setup()

-- Enable the following language servers
-- Feel free to add/remove any LSPs that you want here. They will automatically be installed
-- local servers = { 'clangd', 'rust_analyzer', 'pyright', 'tsserver', 'lua_ls', 'gopls' }
local servers = { 'rust_analyzer', 'pyright', 'lua_ls', 'gopls', 'perlnavigator', 'bashls' }

-- Ensure the servers above are installed
require('mason-lspconfig').setup {
    ensure_installed = servers,
}

-- nvim-cmp supports additional completion capabilities
local capabilities = vim.lsp.protocol.make_client_capabilities()
capabilities = require('cmp_nvim_lsp').default_capabilities(capabilities)

for _, lsp in ipairs(servers) do
    require('lspconfig')[lsp].setup {
        on_attach = on_attach,
        capabilities = capabilities,
    }
end

-- Turn on lsp status information
require('fidget').setup()

-- Example custom configuration for lua
--
-- Make runtime files discoverable to the server
local runtime_path = vim.split(package.path, ';')
table.insert(runtime_path, 'lua/?.lua')
table.insert(runtime_path, 'lua/?/init.lua')

require('lspconfig').lua_ls.setup {
    on_attach = on_attach,
    capabilities = capabilities,
    settings = {
        Lua = {
            runtime = {
                -- Tell the language server which version of Lua you're using (most likely LuaJIT)
                version = 'LuaJIT',
                -- Setup your lua path
                path = runtime_path,
            },
            diagnostics = {
                globals = { 'vim' },
            },
            workspace = {
                library = vim.api.nvim_get_runtime_file('', true),
                checkThirdParty = false,
            },
            -- Do not send telemetry data containing a randomized but unique identifier
            telemetry = { enable = false },
        },
    },
}

-- nvim-cmp setup
local cmp = require 'cmp'
local luasnip = require 'luasnip'

cmp.setup {
    snippet = {
        expand = function(args)
            luasnip.lsp_expand(args.body)
        end,
    },
    mapping = cmp.mapping.preset.insert {
        ['<C-d>'] = cmp.mapping.scroll_docs(-4),
        ['<C-f>'] = cmp.mapping.scroll_docs(4),
        ['<C-Space>'] = cmp.mapping.complete(),
        ['<CR>'] = cmp.mapping.confirm {
            behavior = cmp.ConfirmBehavior.Replace,
            select = true,
        },
        ['<Tab>'] = cmp.mapping(function(fallback)
            if cmp.visible() then
                cmp.select_next_item()
            elseif luasnip.expand_or_jumpable() then
                luasnip.expand_or_jump()
            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' }),
    },
    sources = {
        { name = 'nvim_lsp' },
        { name = 'luasnip' },
    },
}

-- The line beneath this is called `modeline`. See `:help modeline`
-- vim: ts=4 sts=4 sw=4 et