Hilbish/preload.lua

199 lines
4.5 KiB
Lua

-- The preload file initializes everything else for our shell
local fs = require 'fs'
local commander = require 'commander'
local bait = require 'bait'
require 'succulent' -- Function additions
local oldDir = hilbish.cwd()
local shlvl = tonumber(os.getenv 'SHLVL')
if shlvl ~= nil then os.setenv('SHLVL', shlvl + 1) else os.setenv('SHLVL', 1) end
-- Builtins
local recentDirs = {}
commander.register('cd', function (args)
if #args > 0 then
local path = table.concat(args, ' '):gsub('$%$','\0'):gsub('${([%w_]+)}', os.getenv)
:gsub('$([%w_]+)', os.getenv):gsub('%z','$'):gsub('^%s*(.-)%s*$', '%1')
if path == '-' then
path = oldDir
print(path)
end
oldDir = hilbish.cwd()
local ok, err = pcall(function() fs.cd(path) end)
if not ok then
print(err:sub(17))
return 1
end
bait.throw('cd', path)
-- add to table of recent dirs
table.insert(recentDirs, 1, path)
recentDirs[11] = nil
return
end
fs.cd(hilbish.home)
bait.throw('cd', hilbish.home)
return
end)
commander.register('exit', function()
os.exit(0)
end)
commander.register('doc', function(args)
local moddocPath = hilbish.dataDir .. '/docs/'
local globalDesc = [[
These are the global Hilbish functions that are always available and not part of a module.]]
if #args > 0 then
local mod = args[1]
local f = io.open(moddocPath .. mod .. '.txt', 'rb')
local funcdocs = nil
if not f then
-- assume subdir
-- dataDir/docs/<mod>/<mod>.txt
moddocPath = moddocPath .. mod .. '/'
local subdocName = args[2]
if not subdocName then
subdocName = 'index'
end
f = io.open(moddocPath .. subdocName .. '.txt', 'rb')
funcdocs = f:read '*a'
local subdocs = table.map(fs.readdir(moddocPath), function(f)
return lunacolors.underline(lunacolors.blue(string.gsub(f, '.txt', '')))
end)
if subdocName == 'index' then
funcdocs = funcdocs .. '\nSubdocs: ' .. table.concat(subdocs, ', ')
end
end
if not f then
print('Could not find docs for module named ' .. mod .. '.')
return 1
end
if not funcdocs then
funcdocs = f:read '*a'
end
local desc = ''
local ok = pcall(require, mod)
if ok then
desc = (mod == 'global' and globalDesc or getmetatable(require(mod)).__doc) .. '\n\n'
end
local backtickOccurence = 0
print(desc .. lunacolors.format(funcdocs:sub(1, #funcdocs - 1):gsub('`', function()
backtickOccurence = backtickOccurence + 1
if backtickOccurence % 2 == 0 then
return '{reset}'
else
return '{underline}{green}'
end
end)))
f:close()
return
end
local modules = table.map(fs.readdir(moddocPath), function(f)
return lunacolors.underline(lunacolors.blue(string.gsub(f, '.txt', '')))
end)
io.write [[
Welcome to Hilbish's doc tool! Here you can find documentation for builtin
functions and other things.
Usage: doc <section> [subdoc]
A section is a module or a literal section and a subdoc is a subsection for it.
Available sections: ]]
print(table.concat(modules, ', '))
return
end)
do
local virt_G = { }
setmetatable(_G, {
__index = function (_, key)
local got_virt = virt_G[key]
if got_virt ~= nil then
return got_virt
end
virt_G[key] = os.getenv(key)
return virt_G[key]
end,
__newindex = function (_, key, value)
if type(value) == 'string' then
os.setenv(key, value)
virt_G[key] = value
else
if type(virt_G[key]) == 'string' then
os.setenv(key, '')
end
virt_G[key] = value
end
end,
})
bait.catch('command.exit', function ()
for key, value in pairs(virt_G) do
if type(value) == 'string' then
virt_G[key] = os.getenv(key)
end
end
end)
end
commander.register('cdr', function(args)
if not args[1] then
print(lunacolors.format [[
cdr: change directory to one which has been recently visied
usage: cdr <index>
to get a list of recent directories, use {green}{underline}cdr list{reset}]])
return
end
if args[1] == 'list' then
if #recentDirs == 0 then
print 'No directories have been visited.'
return 1
end
print(table.concat(recentDirs, '\n'))
return
end
local index = tonumber(args[1])
if not index then
print(string.format('received %s as index, which isn\'t a number', index))
return 1
end
if not recentDirs[index] then
print(string.format('no recent directory found at index %s', index))
return 1
end
fs.cd(recentDirs[index])
return
end)
-- Hook handles
bait.catch('command.not-found', function(cmd)
print(string.format('hilbish: %s not found', cmd))
end)
bait.catch('command.no-perm', function(cmd)
print(string.format('hilbish: %s: no permission', cmd))
end)