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opus/sys/apis/git.lua
kepler155c@gmail.com 99b2fa1b0b package manager
2018-11-04 13:00:37 -05:00

85 lines
1.9 KiB
Lua

local json = require('json')
local Util = require('util')
-- Limit queries to once per minecraft day
-- TODO: will not work if time is stopped
local TREE_URL = 'https://api.github.com/repos/%s/%s/git/trees/%s?recursive=1'
local FILE_URL = 'https://raw.githubusercontent.com/%s/%s/%s/%s'
local git = { }
local fs = _G.fs
local os = _G.os
if not _G.GIT then
_G.GIT = { }
end
function git.list(repository)
local t = Util.split(repository, '(.-)/')
local user = table.remove(t, 1)
local repo = table.remove(t, 1)
local branch = table.remove(t, 1) or 'master'
local path
if not Util.empty(t) then
path = table.concat(t, '/') .. '/'
end
local cacheKey = table.concat({ user, repo, branch }, '-')
local fname = fs.combine('.git', cacheKey)
local function getContents()
if fs.exists(fname) then
local contents = Util.readTable(fname)
if contents and contents.data == os.day() then
return contents.data
end
fs.delete(fname)
end
local dataUrl = string.format(TREE_URL, user, repo, branch)
local contents = Util.download(dataUrl)
if contents then
return json.decode(contents)
end
end
local data = getContents() or error('Invalid repository')
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")
end
if not fs.exists(fname) then
Util.writeTable('.git/' .. cacheKey, { day = os.day(), data = data })
end
local list = { }
for _,v in pairs(data.tree) do
if v.type == "blob" then
v.path = v.path:gsub("%s","%%20")
if not path then
list[v.path] = {
url = string.format(FILE_URL, user, repo, branch, v.path),
size = v.size,
}
elseif Util.startsWith(v.path, path) then
local p = string.sub(v.path, #path)
list[p] = {
url = string.format(FILE_URL, user, repo, branch, path .. p),
size = v.size,
}
end
end
end
return list
end
return git