Merge pull request #1 from OpnSrcConstruction/03-plugins

03 plugins... Some theming tweaks...

.gitignore

@@ -39,5 +39,7 @@ luac.out
 *.x86_64
 *.hex
 
+*~
+
 
 plugin/packer_compiled.lua

init.lua

@@ -1,4 +1,18 @@
+-- Below is the sourced file where I keep most of my general options.
+-- Please remember the lua @ the begining & end of the string are implied.
+-- In other words "user.abbrs" is the same as "lua.user.abbrs" | "user.abbrs.lua" | "lua.user.abbrs.lua".
 require "user.options"
+-- I have auto-commands for cursor-file persistance,
+-- auto. vertically centering, & auto-saving text-folds.
 require "user.keymaps"
+-- Abbreviations for manual text-replacements.
+-- Populated mostly with a top 100 list of commonly misspelled words.
+require "user.abbrs"
+-- My personnel plugins lua configuration file.
+-- I will be adding to this file often,
+-- b/c it's where I will be adding plugins to packer.
+-- I like that Packer is fully in lua.
 require "user.plugins"
+-- This is where I will add my color-schemes.
 require "user.colorscheme"
+

lua/user/abbrs.lua

@@ -0,0 +1,204 @@
+--##########################i#####################
+--# Autocorrect/abbreviation-shortcut Dictionary #
+--################################################
+-- Just pressing space-bar after a misspelled word, will auto. change to the propper spelling|phrase.
+-- Most ofthese were taken from a list of the top 100 most commonly misspelled English words.
+vim.cmd
+[[
+  iab ture true
+  iab flase false
+  iab kevin. kevin.j.lausen@gmail.com
+  iab i I
+  iab teh the
+  iab acomodate accommodate
+  iab acommodate accommodate
+  iab accomodate accommodate
+  iab acheive achieve
+  iab aquire acquire
+  iab acros across
+  iab adres address
+  iab addres address
+  iab adress address
+  iab advertize advertise
+  iab aparent apparent
+  iab argumant argument
+  iab athete athlete
+  iab aweful awful
+  iab balkanse balance
+  iab bandwith bandwidth
+  iab basicly basically
+  iab basicaly basically
+  iab becomming becoming
+  iab begining beginning
+  iab beleive believe
+  iab bennefit benefit
+  iab briliant brilliant
+  iab busines business
+  iab calender calendar
+  iab carefull careful
+  iab catagory category
+  iab cieling ceiling
+  iab comming coming
+  iab citicen citizen
+  iab conveneince convenience
+  iab competittion competition
+  iab critisize criticize
+  iab develope develop
+  iab desprate desperate
+  iab diference difference
+  iab dilema dilemma
+  iab disapear disappear
+  iab dissapear disappear
+  iab distrobution distribution
+  iab disapoint disappoint
+  iab dissapoint disappoint
+  iab disipline discipline
+  iab dos does
+  iab duering during
+  iab iether  either
+  iab embaras embarrass
+  iab embarass embarrass
+  iab embarras embarrass
+  iab envirenment environment
+  iab equiped equipped
+  iab exagerate exaggerate
+  iab excelent excellent
+  iab exept except
+  iab experiense experience
+  iab facsinating fascinating
+  iab finaly finally
+  iab foriegn foreign
+  iab fourty forty
+  iab fundimental fundamental
+  iab generaly generally
+  iab govermint government
+  iab goverment government
+  iab gramar grammar
+  iab garantee guarentee
+  iab giedence  guidence
+  iab hapiness happiness
+  iab horedously horrendously
+  iab hero heroe
+  iab humerous humorous
+  iab imatation imitation
+  iab immitation imitation
+  iab imediately immediately
+  iab incidentaly incidentally
+  iab indipendent independent
+  iab independiny independent
+  iab intristing interesting
+  iab interfer interfere
+  iab interpratation interpretation
+  iab interuption interruption
+  iab irelevant irrelevant
+  iab irrelivant irrelevant
+  iab irrelevint irrelevant
+  iab iland island
+  iab jelous jealous
+  iab jealus jealous
+  iab judgement judgment
+  iab laboritory laboratory
+  iab lenth length
+  iab leson lesson
+  iab lisense license
+  iab lonlines lonliness
+  iab loseing losing
+  iab lieing lying
+  iab mariage marriage
+  iab marage marriage
+  iab mathimatics mathematics
+  iab mathamatics mathematics
+  iab medisine medicine
+  iab miniture miniature
+  iab minite minute
+  iab mystyrious mysterious
+  iab naturaly naturally
+  iab necesary necessary
+  iab nieghbor neighbor
+  iab niether neither
+  iab noticable noticeable
+  iab ocasion occasion
+  iab ocasional occasional
+  iab ocured occurred
+  iab occured occurred
+  iab ocurred occurred
+  iab oficial official
+  iab oftan often
+  iab oftin often
+  iab omision omission
+  iab oparate operate
+  iab opirate operate
+  iab optamism optimism
+  iab paralel parallel
+  iab particalary particulary
+  iab percieve perceive
+  iab perminant permanent
+  iab permanint permanent
+  iab perservere persevere
+  iab persavere persevere
+  iab persade persuade
+  iab personel personnel
+  iab peice piece
+  iab planing planning
+  iab plesant pleasant
+  iab politicul political
+  iab politacala political
+  iab poses possess
+  iab posses possess
+  iab posess possess
+  iab posible possible
+  iab practacle practicle
+  iab prafer prefer
+  iab prifer prefer
+  iab predjudice prejudice
+  iab presince presence
+  iab privalege privilege
+  iab privledge privilage
+  iab privlege privilege
+  iab probly probably
+  iab profesional professional
+  iab promis promise
+  iab psycology psychology
+  iab quantaty quantity
+  iab quartar quarter
+  iab realise realize
+  iab recieve receive
+  iab recognise recognize
+  iab recomend recommend
+  iab recamend recommend
+  iab recammend recommend
+  iab refrence reference
+  iab religus religious
+  iab religius religious
+  iab repatition repitition
+  iab resturant restaurant
+  iab rhythem rhythm
+  iab rhythum rhythm
+  iab rediculous ridiculous
+  iab sacrafice sacrifice
+  iab safty safety
+  iab scisors scissors
+  iab secratary secretary
+  iab shinning shining
+  iab simaler similar
+  iab soldeir soldier
+  iab speach speech
+  iab stoping stopping
+  iab suceed succeed
+  iab sucessful successful
+  iab sucesful successful
+  iab succesful successful
+  iab surly surely
+  iab tempurature temperature
+  iab temperary temporary
+  iab thruogh through
+  iab towrd toward
+  iab treis tries
+  iab truley truly
+  iab twelvth twelfth
+  iab usualy usually
+  iab vilage village
+  iab wierd weird
+  iab welcom welcome
+]]
+

lua/user/keymaps.lua

@@ -1,16 +1,20 @@
-local opts = { noremap = true, silent = true }
+-- changed silent to false, b/c for now I have the space for it,
+-- and prefer verbosity!
+  local opts = { noremap = true, silent = false }
 
-local term_opts = { silent = true }
+-- Terminal options for.
+  local term_opts = { silent = true }
 
--- Shorten function name
-local keymap = vim.api.nvim_set_keymap
+-- Shorten function name.
+  local keymap = vim.api.nvim_set_keymap
 
---Remap space as leader key
-keymap("", "<Space>", "<Nop>", opts)
-vim.g.mapleader = " "
-vim.g.maplocalleader = " "
+--Re-map space as leader key.
+--I already did this on vim & neovim(init.vim).
+  keymap("", "<Space>", "<Nop>", opts)
+  vim.g.mapleader = " "
+  vim.g.maplocalleader = " "
 
--- Modes
+-- Modes:
 --  normal_mode = "n",
 --  insert_mode = "i",
 --  visual_mode = "v",
@@ -20,51 +24,144 @@ vim.g.maplocalleader = " "
 
 -- Normal --
 -- Better window navigation
-keymap("n", "<C-h>", "<C-w>h", opts)
-keymap("n", "<C-j>", "<C-w>j", opts)
-keymap("n", "<C-k>", "<C-w>k", opts)
-keymap("n", "<C-l>", "<C-w>l", opts)
+-- Exactly what I would have done...
+  keymap("n", "<C-h>", "<C-w>h", opts)
+  keymap("n", "<C-j>", "<C-w>j", opts)
+  keymap("n", "<C-k>", "<C-w>k", opts)
+  keymap("n", "<C-l>", "<C-w>l", opts)
 
-keymap("n", "<leader>e", ":Lex 30<cr>", opts)
+-- Toggle NetRW Plugin for now...
+  keymap("n", "<leader>e", ":Lex 30<cr>", opts)
 
--- Resize with arrows
-keymap("n", "<C-Up>", ":resize -2<CR>", opts)
-keymap("n", "<C-Down>", ":resize +2<CR>", opts)
-keymap("n", "<C-Left>", ":vertical resize -2<CR>", opts)
-keymap("n", "<C-Right>", ":vertical resize +2<CR>", opts)
+-- Resize with with Ctrl-Up/Down/Left/Right.
+-- Tweaked slightly like on the Video-series.
+  keymap("n", "<C-Up>", ":resize +2<CR>", opts)
+  keymap("n", "<C-Down>", ":resize -2<CR>", opts)
+  keymap("n", "<C-Left>", ":vertical resize +2<CR>", opts)
+  keymap("n", "<C-Right>", ":vertical resize -2<CR>", opts)
 
--- Navigate buffers
-keymap("n", "<S-l>", ":bnext<CR>", opts)
-keymap("n", "<S-h>", ":bprevious<CR>", opts)
-
--- Move text up and down
-keymap("n", "<A-j>", "<Esc>:m .+1<CR>==gi", opts)
-keymap("n", "<A-k>", "<Esc>:m .-2<CR>==gi", opts)
+-- Navigate buffers.
+-- I like changing buffers this way,
+-- b/c I was running into problems w/ Ctrl-f/b.
+  keymap("n", "<S-l>", ":bnext<CR>", opts)
+  keymap("n", "<S-h>", ":bprevious<CR>", opts)
 
 -- Insert --
--- Press jk fast to enter
+-- Press jk fast to enter Normal-mode, from Insert-mode.
 keymap("i", "jk", "<ESC>", opts)
 
 -- Visual --
--- Stay in indent mode
-keymap("v", "<", "<gv", opts)
-keymap("v", ">", ">gv", opts)
+-- Stay in indent mode.
+-- I like this idea.
+  keymap("v", "<", "<gv", opts)
+  keymap("v", ">", ">gv", opts)
 
--- Move text up and down
-keymap("v", "<A-j>", ":m .+1<CR>==", opts)
-keymap("v", "<A-k>", ":m .-2<CR>==", opts)
-keymap("v", "p", '"_dP', opts)
+-- Move text highlights up & down.
+  keymap("v", "<A-j>", ":m .+1<CR>==", opts)
+  keymap("v", "<A-k>", ":m .-2<CR>==", opts)
+  keymap("v", "p", '"_dP', opts)
+-- Subltle change, but if you paste over a visual selection;
+-- Now it won't put what you pasted over into the 2-be-pasted-next buffer. 
 
 -- Visual Block --
--- Move text up and down
-keymap("x", "J", ":move '>+1<CR>gv-gv", opts)
-keymap("x", "K", ":move '<-2<CR>gv-gv", opts)
-keymap("x", "<A-j>", ":move '>+1<CR>gv-gv", opts)
-keymap("x", "<A-k>", ":move '<-2<CR>gv-gv", opts)
+-- Move full lines Up/Down.
+  keymap("x", "J", ":move '>+1<CR>gv-gv", opts)
+  keymap("x", "K", ":move '<-2<CR>gv-gv", opts)
+  keymap("x", "<A-j>", ":move '>+1<CR>gv-gv", opts)
+  keymap("x", "<A-k>", ":move '<-2<CR>gv-gv", opts)
+
+-- "############################
+-- "# leader-mappings section: #
+-- "############################
+  keymap("n", "<leader>top", ":set paste<CR>", opts)  -- Turn special pasting on ONLY when needed.
+
+-- "################################################################
+-- "# Toggle highlight searching.                                  #
+-- "# Map nh to toggle off the search highlighting in Normal mode. #
+-- "################################################################
+  keymap("n", "<leader>nh", ":nohl<CR>", opts)
+
+-- ##########################################################
+-- ## Map nn, to toggle regular line-numberings on,          #
+-- ## to check for which specific line of the file your on. #
+-- ##########################################################
+  keymap("n", "<leader>lno", ":set nonu<CR>", opts) -- Turn line-numbers OFF.
+  keymap("n", "<leader>ln", ":set nu<CR>", opts)    -- Turn line-numbers back on.
+
+-- ###################################################################
+-- ## Map nr to toggle off the relative line numbers in Normal mode. #
+-- ###################################################################
+  keymap("n", "<leader>nno", ":set nornu<CR>", opts) -- Turn relative line-numbers OFF.
+  keymap("n", "<leader>rn", ":set rnu<CR>", opts)  -- Turn relative line-numbers back on.
+
+-- ###########################################################################
+-- ##I'm mapping comma{,} + lower-case 'l' to disable special char listings. #
+-- ###########################################################################
+  keymap("n", "<leader>nls", ":set nolist<CR>", opts) -- Turn special hidden chars OFF.
+  keymap("n", "<leader>ls", ":set list<CR>", opts)    -- Turn List(ls) mode back on.
+
+-- ###############################################################################
+-- ## cm == copy-mode. disables special characters($) and relative-line-numbers. #
+-- ###############################################################################
+ keymap("n", "<leader>cm", ":set nolist <CR> <bar> :set nornu <CR> <bar> :set nonu <CR>", opts)
+
+-- ##############################################################
+-- ## Spell check set to sc(Spell-Check)/es(Switch 2 ESpañol.). #
+-- ##############################################################
+  keymap("n", "<leader>sc", ":setlocal spell! spelllang=en_us<CR>", opts)
+  keymap("n", "<leader>es", ":set spelllang=es<CR>", opts)
+
+-- #########################################################################
+-- ## hotkey mappings for jumps, marks, buffer-LiSting, and changes lists. #
+-- #########################################################################
+  keymap("n", "<leader>mm", ":marks<CR>", opts)     -- This will open up the Marks-list.
+  keymap("n", "<leader>jj", ":jumps<CR>", opts)     -- This will open up the Jumps-list.
+  keymap("n", "<leader>ll", ":ls<CR>", opts)        -- This opens up the buffers-list.
+  keymap("n", "<leader>cc", ":changes<CR>", opts)   -- This will open up the Changes-list.
+  keymap("n", "<leader>rr", ":registers<Cr>", opts) -- This will open up the Registers-list.
+
+-- #########################################################################
+-- ## Adding some hotkeys to more easily deal with splits.                 #
+-- ## qq == :q aka quit file. You will be prompted if the file is unsaved. #
+-- ## wq == :wq aka Save and quit.                                         #
+-- ## qa == :qa! aka quit the file without saving                          #
+-- ## w == :w <ENTER> aka save(write) file.                                #
+-- #########################################################################
+  keymap("n", "<leader>qq", ":q<CR>", opts)
+  keymap("n", "<leader>wq", ":wq<CR>", opts)
+  keymap("n", "<leader>qa", ":qa!<CR>", opts)
+  keymap("n", "<leader>s", ":w<CR>", opts)
+
+-- ##################
+-- ## Mark-keymaps: #
+-- ##################
+  keymap("n", "<leader>dm", ":delmarks!<CR>", opts)     -- Delete ALL marks:
+-- #################
+-- # TAB keymaps:  #
+-- #################
+  keymap("n", "<leader>tn", ":tabnew ", opts)       -- New-tab
+  keymap("n", "<leader>bt", "gT", opts)             -- Backward-tab(s)
+  keymap("n", "<leader>ft", "gt", opts)             -- Forward-tab(s)
+  keymap("n", "<leader>tc", ":tabclose<CR>", opts)  -- Close-tab
+  keymap("n", "<leader>db", ":bd<CR>", opts)        -- Delete-Buffer
+
+-- ###############################################################################
+-- # Split-keymaps:                                                              #
+-- #The following combos split the view, and it is up to you to switch to        #
+-- #different files or locations in a large file perhaps.                        #
+-- #*~In a powershell or cmd prompt, there is possibly no session or             #
+-- #tmux|screen|byobu or jobs like functionality I've been able to find.         #
+-- #Although clink 4 cmd does have history/jab-control, but sadly no shell-view  #
+-- #multi-plexing. :(                                                            #
+-- ###############################################################################
+  keymap("n", "<leader>sp", ":split<CR>", opts)     -- Splits current view horizontally.
+  keymap("n", "<leader>vp", ":vsplit<CR>", opts)    -- Splits current view Vertically. 
 
 -- Terminal --
--- Better terminal navigation
-keymap("t", "<C-h>", "<C-\\><C-N><C-w>h", term_opts)
-keymap("t", "<C-j>", "<C-\\><C-N><C-w>j", term_opts)
-keymap("t", "<C-k>", "<C-\\><C-N><C-w>k", term_opts)
-keymap("t", "<C-l>", "<C-\\><C-N><C-w>l", term_opts)
+-- Better terminal navigation... ???
+-- This is the ONLY block I am not sure if I want to include in my config,
+-- b/c I don't understand what it does; so I'll disable it for now...
+-- keymap("t", "<C-h>", "<C-\\><C-N><C-w>h", term_opts)
+-- keymap("t", "<C-j>", "<C-\\><C-N><C-w>j", term_opts)
+-- keymap("t", "<C-k>", "<C-\\><C-N><C-w>k", term_opts)
+-- keymap("t", "<C-l>", "<C-\\><C-N><C-w>l", term_opts)

lua/user/options.lua

@@ -1,46 +1,60 @@
+-- :help options
 local options = {
-  backup = false,                          -- creates a backup file
-  clipboard = "unnamedplus",               -- allows neovim to access the system clipboard
-  cmdheight = 2,                           -- more space in the neovim command line for displaying messages
-  completeopt = { "menuone", "noselect" }, -- mostly just for cmp
-  conceallevel = 0,                        -- so that `` is visible in markdown files
-  fileencoding = "utf-8",                  -- the encoding written to a file
-  hlsearch = true,                         -- highlight all matches on previous search pattern
-  ignorecase = true,                       -- ignore case in search patterns
-  mouse = "a",                             -- allow the mouse to be used in neovim
-  pumheight = 10,                          -- pop up menu height
-  showmode = false,                        -- we don't need to see things like -- INSERT -- anymore
-  showtabline = 2,                         -- always show tabs
-  smartcase = true,                        -- smart case
-  smartindent = true,                      -- make indenting smarter again
-  splitbelow = true,                       -- force all horizontal splits to go below current window
-  splitright = true,                       -- force all vertical splits to go to the right of current window
-  swapfile = false,                        -- creates a swapfile
-  -- termguicolors = true,                    -- set term gui colors (most terminals support this)
-  timeoutlen = 1000,                        -- time to wait for a mapped sequence to complete (in milliseconds)
-  undofile = true,                         -- enable persistent undo
-  updatetime = 300,                        -- faster completion (4000ms default)
-  writebackup = false,                     -- if a file is being edited by another program (or was written to file while editing with another program), it is not allowed to be edited
-  expandtab = true,                        -- convert tabs to spaces
-  shiftwidth = 2,                          -- the number of spaces inserted for each indentation
-  tabstop = 2,                             -- insert 2 spaces for a tab
-  cursorline = true,                       -- highlight the current line
-  number = true,                           -- set numbered lines
-  relativenumber = false,                  -- set relative numbered lines
-  numberwidth = 4,                         -- set number column width to 2 {default 4}
-  signcolumn = "yes",                      -- always show the sign column, otherwise it would shift the text each time
-  wrap = false,                            -- display lines as one long line
-  scrolloff = 8,                           -- is one of my fav
-  sidescrolloff = 8,
-  guifont = "monospace:h17",               -- the font used in graphical neovim applications
+-- Display settings:
+  fileencoding = "utf-8",                              -- The encoding written to a file.
+  showtabline = 2,                                     -- Always show tabs.
+  cmdheight = 2,                                       -- More space in the neovim command line, for displaying messages.
+  pumheight = 10,                                      -- Pop up menu height.
+  splitbelow = true,                                   -- Force all horizontal splits, to go below current window.
+  splitright = true,                                   -- Force all vertical splits, to go to the right of current window.
+-- Theme:
+  termguicolors = true,                                -- Set terminal GUI colors.
+  cursorline = true,                                   -- Highlight the current line.
+  cursorcolumn = true,                                 -- Enable a vertical column.
+  number = true,                                       -- Set numbered lines.
+  relativenumber = true,                               -- Set relative numbered lines.
+  numberwidth = 4,                                     -- set number line column width up to 4(default 4).
+  signcolumn = "yes",                                  -- Always show the sign column, or it would shift the text each time.
+-- Functionality:
+  mouse = "a",                                         -- Allow the mouse to be used in neovim.
+  backup = true,                                       -- Creates a backup file, before edits are written.
+  clipboard = "unnamedplus",                           -- Allows neovim to access the system clipboard.
+  swapfile = true,                                     -- Creates a swapfile.
+  timeoutlen = 1000,                                   -- Time to wait, for a mapped sequence to complete(in milliseconds).
+  undofile = true,                                     -- Enable persistent undo.
+  undodir = "~/.config/nvim/persistant_undo_history",  -- Sets the directory to store persistant-undo saves.
+  updatetime = 300,                                    -- Faster completion(4000ms default).
+  writebackup = true,                                  -- Write a backup file, before saving.
+  completeopt = { "menuone", "noselect" },             -- Mostly just for cmp. ???
+-- Text-formatting:
+  conceallevel = 0,                                    -- Added so `` is visible in markdown files.
+  smartindent = true,                                  -- Keep indention from line-to-line.
+  expandtab = true,                                    -- Convert tabs into spaces.
+  shiftwidth = 4,                                      -- The number of spaces inserted for each indentation
+  tabstop = 4,                                         -- Insert 2 spaces for each tab.
+  wrap = true,                                         -- Wrap my code-lines on the visible screen.
+  guifont = "monospace:h17",                           -- The font used in graphical neovim applications.
+-- Search:
+  hlsearch = true,                                     -- Highlight all matches on when searching.
+  incsearch = true,                                    -- Turn on incremental search highlighting.
+  ignorecase = true,                                   -- Ignore case in search patterns.
+  smartcase = false,                                   -- Overides ignore case, w/ capitals. Default = false.
+  hidden = true,                                       -- Saves all buffers before an exit. if hidden biffers exist.
 }
+-- A lua for-loop to loop through the above table of options.
+-- A table is a list, that is allowed key, value pairs.
+  for k, v in pairs(options) do
+    vim.opt[k] = v
+  end
 
-vim.opt.shortmess:append "c"
+-- Enabling editor pips/EOL/trails/ext/pre...
+  vim.o.list = true  -- Set special formatting characters to on.
+  vim.o.listchars = 'eol:↲,trail:~,precedes:<,extends:>,space:·'
 
-for k, v in pairs(options) do
-  vim.opt[k] = v
-end
+-- Did NOT fit well within the options loop , without throwing errors and disabling the loop.
+  vim.opt.shortmess:append "I"                    -- Set No Intro-message for Neo-vim.
 
-vim.cmd "set whichwrap+=<,>,[,],h,l"
-vim.cmd [[set iskeyword+=-]]
-vim.cmd [[set formatoptions-=cro]] -- TODO: this doesn't seem to work
+-- vim.cmd Passes strings, that will be interpreted as vim-script.
+-- vim.cmd "set whichwrap+=<,>,[,],h,l" Want to find out what it does, before blindly enabling it.
+  vim.cmd [[set iskeyword+=-]] -- Will treat words with a dash as part of a single word.
+--vim.cmd [[set formatoptions-=cro]] -- TODO: this doesn't seem to work

lua/user/plugins.lua

@@ -44,6 +44,12 @@ return packer.startup(function(use)
   use "wbthomason/packer.nvim" -- Have packer manage itself
   use "nvim-lua/popup.nvim" -- An implementation of the Popup API from vim in Neovim
   use "nvim-lua/plenary.nvim" -- Useful lua functions used ny lots of plugins
+  use "vim-airline/vim-airline" -- Plugin to give a much blingier neo-vim status-line, with  themes available for GruvBox/CodeDark.
+  use "mhinz/vim-startify"      -- Neo-vim customizable Neo-vim start-page, w/ bookmarks/ascii cow programming humor each launch/re-load.
+  use "yggdroot/indentline"     -- A great fct. to visualize layers of column/vertical alignment groups of code.
+  use "rafi/awesome-vim-colorschemes"  -- Various vim-colour schemes.
+  use "ryanoasis/vim-devicons"     -- Developer icons for Neo-vim plugins like file-managers...
+  use "tpope/vim-surround"         -- great tag/code-encapsulator plugin.
 
   -- Colorschemes
   -- use "lunarvim/colorschemes" -- A bunch of colorschemes you can try out