Lua Visual Game Engine Installer

Jummit

Dec 12th, 2018

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--[[ /gitget
GitHub downloading utility for CC.
Developed by apemanzilla.
This requires ElvishJerricco's JSON parsing API.
Direct link: http://pastebin.com/raw.php?i=4nRg9CHU
]]--
-- Edit these variables to use preset mode.
-- Whether to download the files asynchronously (huge speed benefits, will also retry failed files)
-- If false will download the files one by one and use the old output (List each file name as it's downloaded) instead of the progress bar
local async = true
-- Whether to write to the terminal as files are downloaded
-- Note that unless checked for this will not affect pre-set start/done code below
local silent = false
local preset = {
-- The GitHub account name
user = nil,
-- The GitHub repository name
repo = nil,
-- The branch or commit tree to download (defaults to 'master')
branch = nil,
-- The local folder to save all the files to (defaults to '/')
path = nil,
-- Function to run before starting the download
start = function()
if not silent then print("Downloading files from GitHub...") end
end,
-- Function to run when the download completes
done = function()
if not silent then print("Done") end
end
}
-- Leave the rest of the program alone.
local args = {
"Jummit",
"Visual-Computercraft-Game-Engine"
}
args[1] = preset.user or args[1]
args[2] = preset.repo or args[2]
args[3] = preset.branch or args[3] or "master"
args[4] = preset.path or args[4] or ""
if #args < 2 then
print("Usage:\n"..((shell and shell.getRunningProgram()) or "gitget").." <user> <repo> [branch/tree] [path]") error()
end
local function save(data,file)
local file = shell.resolve(file:gsub("%%20"," "))
if not (fs.exists(string.sub(file,1,#file - #fs.getName(file))) and fs.isDir(string.sub(file,1,#file - #fs.getName(file)))) then
if fs.exists(string.sub(file,1,#file - #fs.getName(file))) then fs.delete(string.sub(file,1,#file - #fs.getName(file))) end
fs.makeDir(string.sub(file,1,#file - #fs.getName(file)))
end
local f = fs.open(file,"w")
f.write(data)
f.close()
end
local function download(url, file)
save(http.get(url).readAll(),file)
end
if not json then
download("http://pastebin.com/raw.php?i=4nRg9CHU","json")
os.loadAPI("json")
end
preset.start()
local data = json.decode(http.get("https://api.github.com/repos/"..args[1].."/"..args[2].."/git/trees/"..args[3].."?recursive=1").readAll())
if data.message and data.message:find("API rate limit exceeded") then error("Out of API calls, try again later") end
if data.message and data.message == "Not found" then error("Invalid repository",2) else
for k,v in pairs(data.tree) do
-- Make directories
if v.type == "tree" then
fs.makeDir(fs.combine(args[4],v.path))
if not hide_progress then
end
end
end
local drawProgress
if async and not silent then
local _, y = term.getCursorPos()
local wide, _ = term.getSize()
term.setCursorPos(1, y)
term.write("[")
term.setCursorPos(wide - 6, y)
term.write("]")
drawProgress = function(done, max)
local value = done / max
term.setCursorPos(2,y)
term.write(("="):rep(math.floor(value * (wide - 8))))
local percent = math.floor(value * 100) .. "%"
term.setCursorPos(wide - percent:len(),y)
term.write(percent)
end
end
local filecount = 0
local downloaded = 0
local paths = {}
local failed = {}
for k,v in pairs(data.tree) do
-- Send all HTTP requests (async)
if v.type == "blob" then
v.path = v.path:gsub("%s","%%20")
local url = "https://raw.github.com/"..args[1].."/"..args[2].."/"..args[3].."/"..v.path,fs.combine(args[4],v.path)
if async then
http.request(url)
paths[url] = fs.combine(args[4],v.path)
filecount = filecount + 1
else
download(url, fs.combine(args[4], v.path))
if not silent then print(fs.combine(args[4], v.path)) end
end
end
end
while downloaded < filecount do
local e, a, b = os.pullEvent()
if e == "http_success" then
save(b.readAll(),paths[a])
downloaded = downloaded + 1
if not silent then drawProgress(downloaded,filecount) end
elseif e == "http_failure" then
-- Retry in 3 seconds
failed[os.startTimer(3)] = a
elseif e == "timer" and failed[a] then
http.request(failed[a])
end
end
end
preset.done()

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