numToStr · August 20, 2023 05:15 · Sep 18, 2021 · Sep 17, 2021 · Sep 17, 2021 · Sep 17, 2021
diff --git a/my_autocmds.lua b/my_autocmds.lua
@@ -26,7 +26,7 @@ end
 
 au.BufRead = { '*.txt', 'echo &ft' }
 
--- # Autocmd with multiple event: au(events: table, {pattern: string, action: string | fn})
+-- # Autocmd with multiple event: au(events: table, cmd: string | fn | {pattern: string, action: string | fn})
 
 -- For this you can just call the required module just like a function
 au({ 'BufNewFile', 'BufRead' }, {

diff --git a/my_autocmds.lua b/my_autocmds.lua
@@ -36,7 +36,7 @@ au({ 'BufNewFile', 'BufRead' }, {
     end,
 })
 
--- # Autocmd group: au.group(group: string, {event: string, pattern: string, action: string | fn})
+-- # Autocmd group: au.group(group: string, cmds: fn(au) | {event: string, pattern: string, action: string | fn})
 
 -- 1. Where action is a ex-cmd
 au.group('PackerGroup', {

diff --git a/au.lua b/au.lua
@@ -14,31 +14,37 @@ local function autocmd(this, event, spec)
     cmd('autocmd ' .. e .. ' ' .. pattern .. ' ' .. action)
 end
 
-local B = {
+local S = {
     __au = {},
 }
 
-function B.exec(id)
-    B.__au[id]()
+local X = setmetatable({}, {
+    __index = S,
+    __newindex = autocmd,
+    __call = autocmd,
+})
+
+function S.exec(id)
+    S.__au[id]()
 end
 
-function B.set(fn)
+function S.set(fn)
     local id = string.format('%p', fn)
-    B.__au[id] = fn
+    S.__au[id] = fn
     return string.format('lua require("au").exec("%s")', id)
 end
 
-function B.group(grp, cmds)
+function S.group(grp, cmds)
     cmd('augroup ' .. grp)
     cmd('autocmd!')
-    for _, au in ipairs(cmds) do
-        autocmd(B, au[1], { au[2], au[3] })
+    if type(cmds) == 'function' then
+        cmds(X)
+    else
+        for _, au in ipairs(cmds) do
+            autocmd(S, au[1], { au[2], au[3] })
+        end
     end
     cmd('augroup END')
 end
 
-return setmetatable({}, {
-    __index = B,
-    __newindex = autocmd,
-    __call = autocmd,
-})
+return X
diff --git a/my_autocmds.lua b/my_autocmds.lua
@@ -59,4 +59,23 @@ au.group('CocOverrides', {
             vim.fn.CocActionAsync('showSignatureHelp')
         end,
     },
-})
+})
+
+
+-- 3. Or behold some meta-magic
+-- You can give a function as a second arg which receives aucmd-metatable as an argument
+-- Which you can use to set autocmd individually
+au.group('CocOverrides', function(grp)
+    grp.FileType = {
+        'typescript,json',
+        function()
+            vim.api.nvim_buf_set_option(0, 'formatexpr', "CocAction('formatSelected')")
+        end,
+    }
+    grp.User = {
+        'CocJumpPlaceholder',
+        function()
+            vim.fn.CocActionAsync('showSignatureHelp')
+        end,
+    }
+end)
diff --git a/my_autocmds.lua b/my_autocmds.lua
@@ -8,7 +8,7 @@ au.TextYankPost = function()
 end
 
 -- 2. With a pattern
-au2.BufEnter = {
+au.BufEnter = {
     '*.txt',
     function()
         if vim.bo.buftype == 'help' then

diff --git a/au.lua b/au.lua
@@ -25,7 +25,7 @@ end
 function B.set(fn)
     local id = string.format('%p', fn)
     B.__au[id] = fn
-    return string.format('lua require("au2").exec("%s")', id)
+    return string.format('lua require("au").exec("%s")', id)
 end
 
 function B.group(grp, cmds)

diff --git a/my_autocmds.lua b/my_autocmds.lua
@@ -13,8 +13,8 @@ au2.BufEnter = {
     function()
         if vim.bo.buftype == 'help' then
             cmd('wincmd L')
-            local nr = api.nvim_get_current_buf()
-            api.nvim_buf_set_keymap(nr, 'n', 'q', ':q<CR>', { noremap = true, silent = true })
+            local nr = vim.api.nvim_get_current_buf()
+            vim.api.nvim_buf_set_keymap(nr, 'n', 'q', ':q<CR>', { noremap = true, silent = true })
         end
     end,
 }

diff --git a/au.lua b/au.lua
@@ -0,0 +1,44 @@
+--
+-- Move this file to your neovim lua runtime path ie. ~/.config/nvim/lua/au.lua
+--
+local cmd = vim.api.nvim_command
+
+local function autocmd(this, event, spec)
+    local is_table = type(spec) == 'table'
+    local pattern = is_table and spec[1] or '*'
+    local action = is_table and spec[2] or spec
+    if type(action) == 'function' then
+        action = this.set(action)
+    end
+    local e = type(event) == 'table' and table.concat(event, ',') or event
+    cmd('autocmd ' .. e .. ' ' .. pattern .. ' ' .. action)
+end
+
+local B = {
+    __au = {},
+}
+
+function B.exec(id)
+    B.__au[id]()
+end
+
+function B.set(fn)
+    local id = string.format('%p', fn)
+    B.__au[id] = fn
+    return string.format('lua require("au2").exec("%s")', id)
+end
+
+function B.group(grp, cmds)
+    cmd('augroup ' .. grp)
+    cmd('autocmd!')
+    for _, au in ipairs(cmds) do
+        autocmd(B, au[1], { au[2], au[3] })
+    end
+    cmd('augroup END')
+end
+
+return setmetatable({}, {
+    __index = B,
+    __newindex = autocmd,
+    __call = autocmd,
+})
diff --git a/my_autocmds.lua b/my_autocmds.lua
@@ -0,0 +1,62 @@
+local au = require('au')
+
+-- # Simple autocmd with one event: au.<event> = string | fn | { pattern: string, action: string | fn }
+
+-- 1. If you want aucmd to fire on every buffer, you can use the style below
+au.TextYankPost = function()
+    vim.highlight.on_yank({ higroup = 'Visual', timeout = 120 })
+end
+
+-- 2. With a pattern
+au2.BufEnter = {
+    '*.txt',
+    function()
+        if vim.bo.buftype == 'help' then
+            cmd('wincmd L')
+            local nr = api.nvim_get_current_buf()
+            api.nvim_buf_set_keymap(nr, 'n', 'q', ':q<CR>', { noremap = true, silent = true })
+        end
+    end,
+}
+
+-- TIP: action can be a ex-cmd or a lua function
+au.BufRead = function()
+    print(vim.bo.filetype)
+end
+
+au.BufRead = { '*.txt', 'echo &ft' }
+
+-- # Autocmd with multiple event: au(events: table, {pattern: string, action: string | fn})
+
+-- For this you can just call the required module just like a function
+au({ 'BufNewFile', 'BufRead' }, {
+    '.eslintrc,.prettierrc,*.json*',
+    function()
+        vim.bo.filetype = 'json'
+    end,
+})
+
+-- # Autocmd group: au.group(group: string, {event: string, pattern: string, action: string | fn})
+
+-- 1. Where action is a ex-cmd
+au.group('PackerGroup', {
+    { 'BufWritePost', 'plugins.lua', 'source <afile> | PackerCompile' },
+})
+
+-- 2. Where action is a function
+au.group('CocOverrides', {
+    {
+        'FileType',
+        'typescript,json',
+        function()
+            vim.api.nvim_buf_set_option(0, 'formatexpr', "CocAction('formatSelected')")
+        end,
+    },
+    {
+        'User',
+        'CocJumpPlaceholder',
+        function()
+            vim.fn.CocActionAsync('showSignatureHelp')
+        end,
+    },
+})
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