nvim: Switch galaxyline for lualine

Recently, galaxyline created some troubles in the setup. Lualine is much
much easier to configure and, since I don't need some of the more
advanced features of galaxyline anyway, I can just use the simple setup
it offers.
If ever those features become necessary again I can presumably just
reintroduce them based on the old galaxyline setup that got removed in
this commit.

nvim/.config/nvim/lua/plug/_galaxyline.lua

@@ -1,244 +0,0 @@
--- set up statusline
-local gl = require 'galaxyline'
-local gls = gl.section
-local fileinfo = require 'galaxyline.provider_fileinfo'
-local devicons = require 'nvim-web-devicons'
-
-local mode_colors = {
-    normal = '#' .. '98c379',
-    insert = '#' .. '61afef',
-    replace = '#' .. 'e06c75',
-    visual = '#' .. 'e5c07b',
-    command = '#' .. 'd19a66',
-    terminal = '#' .. '56b6c2'
-}
-
--- create icons from unicode
-local function u(code)
-    if type(code) == 'string' then code = tonumber('0x' .. code) end
-    local c = string.char
-    if code <= 0x7f then return c(code) end
-    local t = {}
-    if code <= 0x07ff then
-        t[1] = c(bit.bor(0xc0, bit.rshift(code, 6)))
-        t[2] = c(bit.bor(0x80, bit.band(code, 0x3f)))
-    elseif code <= 0xffff then
-        t[1] = c(bit.bor(0xe0, bit.rshift(code, 12)))
-        t[2] = c(bit.bor(0x80, bit.band(bit.rshift(code, 6), 0x3f)))
-        t[3] = c(bit.bor(0x80, bit.band(code, 0x3f)))
-    else
-        t[1] = c(bit.bor(0xf0, bit.rshift(code, 18)))
-        t[2] = c(bit.bor(0x80, bit.band(bit.rshift(code, 12), 0x3f)))
-        t[3] = c(bit.bor(0x80, bit.band(bit.rshift(code, 6), 0x3f)))
-        t[4] = c(bit.bor(0x80, bit.band(code, 0x3f)))
-    end
-    return table.concat(t)
-end
-
-local mode_map = {
-    ['n'] = {'NORMAL', mode_colors.normal},
-    ['i'] = {'INSERT', mode_colors.insert},
-    ['R'] = {'REPLACE', mode_colors.replace},
-    ['v'] = {'VISUAL', mode_colors.visual},
-    ['V'] = {'V-LINE', mode_colors.visual},
-    ['c'] = {'COMMAND', mode_colors.command},
-    ['s'] = {'SELECT', mode_colors.visual},
-    ['S'] = {'S-LINE', mode_colors.visual},
-    ['t'] = {'TERMINAL', mode_colors.terminal},
-    [''] = {'V-BLOCK', mode_colors.visual},
-    [''] = {'S-BLOCK', mode_colors.visual},
-    ['Rv'] = {'VIRTUAL'},
-    ['rm'] = {'--MORE'}
-}
-
-local sep = {
-    right_filled = u 'e0b2',
-    left_filled = u 'e0b0',
-    right = u 'e0b3',
-    left = u 'e0b1'
-}
-
-local icons = {
-    locker = u 'f023',
-    unsaved = u 'f693',
-    lsp_warn = u 'f071',
-    lsp_error = u 'f46e'
-}
-
-local function mode_label() return mode_map[vim.fn.mode()][1] or 'N/A' end
-local function mode_hl() return mode_map[vim.fn.mode()][2] or '#ff0000' end
-
-local function highlight(group, fg, bg, gui)
-    local cmd = string.format('highlight %s guifg=%s guibg=%s', group, fg, bg)
-    if gui ~= nil then cmd = cmd .. ' gui=' .. gui end
-    vim.cmd(cmd)
-end
-
-local function buffer_not_empty()
-    if vim.fn.empty(vim.fn.expand '%:t') ~= 1 then return true end
-    return false
-end
-
-local function wide_enough()
-    local squeeze_width = vim.fn.winwidth(0)
-    if squeeze_width > 80 then return true end
-    return false
-end
-
-gl.short_line_list = {'NvimTree', 'vista', 'dbui'}
-
-gls.left = {
-    {
-        ViMode = {
-            provider = function()
-                local modehl = mode_hl()
-                highlight('GalaxyViMode', '000000', modehl, 'bold')
-                highlight('GalaxyViModeInv', modehl, '000000', 'bold')
-                return string.format('  %s ', mode_label())
-            end,
-            separator = sep.left_filled,
-            separator_highlight = 'GalaxyViModeInv'
-        }
-    }, {
-        FileName = {
-            provider = function()
-                if not buffer_not_empty() then return '' end
-                local fname
-                if wide_enough() then
-                    fname = vim.fn.fnamemodify(vim.fn.expand '%', ':~:.')
-                else
-                    fname = vim.fn.expand '%:t'
-                end
-                if #fname == 0 then return '' end
-                if vim.bo.readonly then
-                    fname = fname .. ' ' .. icons.locker
-                end
-                if vim.bo.modified then
-                    fname = fname .. ' ' .. icons.unsaved
-                end
-                return ' ' .. fname .. ' '
-            end,
-            highlight = 'Normal',
-            separator = sep.left,
-            separator_highlight = 'GalaxyViModeInv'
-        }
-    }, {
-        -- I am unsure how lua specifies order in these, or are tables unordered?
-        -- anyway, without the weird section in between add ALWAYS appears to the left
-        -- of the Branch display
-        DiffAdd = {
-            provider = 'DiffAdd',
-            condition = wide_enough,
-            icon = '+',
-            highlight = 'DiffAdded'
-        },
-        WithoutThisAddedComesBeforeBranch = {
-            provider = function() return '' end
-        },
-        DiffModified = {
-            provider = 'DiffModified',
-            condition = wide_enough,
-            icon = '~',
-            highlight = 'DiffLine'
-        },
-        DiffRemove = {
-            provider = 'DiffRemove',
-            condition = wide_enough,
-            icon = '-',
-            highlight = 'DiffRemoved',
-            separator = sep.left,
-            separator_highlight = 'GalaxyViModeInv'
-        },
-        GitBranch = {
-            provider = {
-                function() return '  ' end, 'GitBranch',
-                function() return ' ' end
-            },
-            condition = require('galaxyline.condition').check_git_workspace and
-                wide_enough,
-            highlight = 'NonText'
-        }
-    }
-}
-
-gls.right = {
-    {
-        LspStatus = {
-            provider = function()
-                local connected =
-                    not vim.tbl_isempty(vim.lsp.buf_get_clients(0))
-                if connected then
-                    return ' ' .. u 'f817' .. ' '
-                else
-                    return ''
-                end
-            end,
-            highlight = 'DiffAdded',
-            separator = sep.right,
-            separator_highlight = 'GalaxyViModeInv'
-        }
-    }, {
-        DiagnosticWarn = {
-            provider = function()
-                local n = vim.lsp.diagnostic.get_count(0, 'Warning')
-                if n == 0 then return '' end
-                return string.format(' %s %d ', icons.lsp_warn, n)
-            end,
-            highlight = 'LspDiagnosticsDefaultWarning'
-        },
-        DiagnosticError = {
-            provider = function()
-                local n = vim.lsp.diagnostic.get_count(0, 'Error')
-                if n == 0 then return '' end
-                return string.format(' %s %d ', icons.lsp_error, n)
-            end,
-            highlight = 'LspDiagnosticsDefaultError'
-        }
-    }, {
-        FileIcon = {
-            provider = function()
-                local fname, ext = vim.fn.expand '%:t', vim.fn.expand '%:e'
-                local icon, _ = devicons.get_icon(fname, ext)
-                if icon == nil then return '' end
-                return ' ' .. icon .. ' '
-            end,
-            separator = sep.right,
-            highlight = 'Normal',
-            separator_highlight = 'GalaxyViModeInv'
-        },
-        FileType = {
-            provider = function()
-                -- if not buffer_not_empty() then
-                --     return ''
-                -- end
-                return string.format(' %s ', vim.bo.filetype)
-            end,
-            -- condition = buffer_not_empty,
-            highlight = 'Normal'
-        }
-    }, {
-        PositionInfo = {
-            provider = {
-                function()
-                    return string.format('%s:%s', vim.fn.line('.'),
-                                         vim.fn.col('.'))
-                end
-            },
-            highlight = 'GalaxyViMode',
-            separator = sep.right_filled,
-            separator_highlight = 'GalaxyViModeInv'
-        },
-        PercentInfo = {
-            provider = fileinfo.current_line_percent,
-            highlight = 'GalaxyViMode',
-            separator = sep.right,
-            separator_highlight = 'GalaxyViMode'
-        }
-    }
-}
-for k, v in pairs(gls.left) do gls.short_line_left[k] = v end
-table.remove(gls.short_line_left, 1)
-
-for k, v in pairs(gls.right) do gls.short_line_right[k] = v end
-table.remove(gls.short_line_right)
-table.remove(gls.short_line_right)

nvim/.config/nvim/lua/plug/_lualine.lua

@@ -0,0 +1,28 @@
+require('lualine').setup {
+    options = {
+        icons_enabled = true,
+        theme = 'auto',
+        component_separators = {left = '', right = ''},
+        section_separators = {left = '', right = ''},
+        disabled_filetypes = {},
+        always_divide_middle = true
+    },
+    sections = {
+        lualine_a = {'mode'},
+        lualine_b = {'branch', 'diff', 'diagnostics'},
+        lualine_c = {'filename'},
+        lualine_x = {'encoding', 'fileformat', 'filetype'},
+        lualine_y = {'progress', 'location'},
+        lualine_z = {'hostname'}
+    },
+    inactive_sections = {
+        lualine_a = {},
+        lualine_b = {'branch', 'diff'},
+        lualine_c = {'filename'},
+        lualine_x = {},
+        lualine_y = {'location'},
+        lualine_z = {}
+    },
+    tabline = {},
+    extensions = {'quickfix', 'toggleterm'}
+}

nvim/.config/nvim/lua/plugins.lua

@@ -36,12 +36,11 @@ require("packer").startup(function()
         'lewis6991/gitsigns.nvim', -- show vcs changes on left-hand gutter
         requires = {'nvim-lua/plenary.nvim'},
         tag = 'release',
-        config = function() require('gitsigns').setup{
-            keymaps = {
-                ['n ]c'] = nil,
-                ['n [c'] = nil,
+        config = function()
+            require('gitsigns').setup {
+                keymaps = {['n ]c'] = nil, ['n [c'] = nil}
             }
-        } end,
+        end,
         event = "BufRead"
     }
     use {
@@ -101,9 +100,9 @@ require("packer").startup(function()
 
     -- statusline
     use {
-        'glepnir/galaxyline.nvim',
+        'nvim-lualine/lualine.nvim',
         requires = {'kyazdani42/nvim-web-devicons', opt = true},
-        config = function() require('plug._galaxyline') end
+        config = function() require('plug._lualine') end
     }
 
     -- writing
@@ -116,7 +115,7 @@ require("packer").startup(function()
             require("true-zen").setup({
                 integrations = {
                     gitsigns = true,
-                    galaxyline = true,
+                    lualine = true,
                     tmux = {global = false},
                     limelight = true
                 }
@@ -135,17 +134,21 @@ require("packer").startup(function()
         ft = "python",
         config = function()
             vim.g.slime_target = 'tmux'
-            vim.g.slime_default_config = {socket_name = "default", target_pane = "{last}"}
+            vim.g.slime_default_config = {
+                socket_name = "default",
+                target_pane = "{last}"
+            }
             vim.g.slime_python_ipython = 1
             vim.g.slime_no_mappings = 1
-        end,
+        end
     }
-    use { 'hanschen/vim-ipython-cell', -- send code 'cells' to REPL
+    use {
+        'hanschen/vim-ipython-cell', -- send code 'cells' to REPL
         ft = "python",
         config = function()
             vim.g.ipython_cell_highlight_cells_ft = {'python'}
             vim.g.ipython_cell_insert_tag = "## Cell"
-        end,
+        end
     }
 
     --