annotate .chezmoitemplates/au.lua @ 460:ae7e377bced8

Add autocmd wrapper for lua
author zegervdv <zegervdv@me.com>
date Sun, 19 Sep 2021 14:57:14 +0200
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children 1635e29e0ed4
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ae7e377bced8 Add autocmd wrapper for lua
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1 --
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2 -- Copied from https://gist.github.com/numToStr/1ab83dd2e919de9235f9f774ef8076da
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3 --
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4 local cmd = vim.api.nvim_command
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5
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6 local function autocmd(this, event, spec)
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7 local is_table = type(spec) == 'table'
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8 local pattern = is_table and spec[1] or '*'
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9 local action = is_table and spec[2] or spec
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10 if type(action) == 'function' then
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11 action = this.set(action)
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12 end
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13 local e = type(event) == 'table' and table.concat(event, ',') or event
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14 cmd('autocmd ' .. e .. ' ' .. pattern .. ' ' .. action)
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15 end
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16
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17 local S = {
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18 __au = {},
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19 }
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20
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21 local X = setmetatable({}, {
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22 __index = S,
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23 __newindex = autocmd,
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24 __call = autocmd,
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25 })
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26
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27 function S.exec(id)
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28 S.__au[id]()
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29 end
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30
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31 function S.set(fn)
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32 local id = string.format('%p', fn)
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33 S.__au[id] = fn
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34 return string.format('lua require("au").exec("%s")', id)
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35 end
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36
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37 function S.group(grp, cmds)
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38 cmd('augroup ' .. grp)
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39 cmd 'autocmd!'
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40 if type(cmds) == 'function' then
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41 cmds(X)
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42 else
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43 for _, au in ipairs(cmds) do
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44 autocmd(S, au[1], { au[2], au[3] })
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45 end
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46 end
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47 cmd 'augroup END'
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48 end
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49
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50 return X