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-- 'package manager'
local rbase = "https://g.gh0.pw/ccprogs/plain/"
local function is_required()
local n = 0
local res = false
while true do
local x = debug.getinfo(n)
if x == nil then break end
n = n + 1
if x.func == require then
res = true
break
end
end
return res
end
local function perr(err,what)
if err then error(what..": "..err) end
end
local _manifests = {}
local function clear_cache()
for k in pairs(_manifests) do _manifests[k] = nil end
end
local function manifest(pkgname)
if _manifests[pkgname] then return _manifests[pkgname] end
print("fetching manifest of '"..pkgname.."'...")
local files={}
local files_present=false
local deps={}
local res,err,err_res = http.get(rbase..pkgname..".dat")
if err then
if err_res and (err_res.getResponseCode() == 404) then
print("no manifest for '"..pkgname.."' found, using defaults")
else
error("http.get: "..err)
end
else
for line in res.readAll():gmatch"[^\n]+" do
local op,argstart = line:match "^(%w+)%s*()"
if op then
local argstr = line:sub(argstart)
local args = {}
for arg in argstr:gmatch"[^ ]+" do
table.insert(args,arg)
end
if op == "dep" then
for _,arg in ipairs(args) do deps[arg]=true end
elseif op == "file" then
files_present = true
for _,arg in ipairs(args) do files[arg]=true end
end
end
end
end
if not files_present then files[pkgname..".lua"]=true end
local man = {files=files,deps=deps}
_manifests[pkgname] = man
return man
end
local function recursive_depsof(pkgname)
local lookedat = {}
local deps = {}
local function F(pkgname)
if not lookedat[pkgname] then
lookedat[pkgname] = true
for k,_ in pairs(manifest(pkgname).deps) do
deps[k] = true
F(k)
end
end
end
deps[pkgname] = true
F(pkgname)
return deps
end
local function recursive_filesof(pkgname)
local deps = recursive_depsof(pkgname)
local files = {}
for dep in pairs(deps) do
for file in pairs(manifest(dep).files) do files[file] = true end
end
return files
end
local function fmt_set(set)
local keys = {}
for k in pairs(set) do table.insert(keys,k) end
table.sort(keys)
return "("..#keys..") " .. table.concat(keys,", ")
end
local function dlfile(filename)
local src=rbase..filename
local dest="/"..filename
print("downloading "..src.." to "..dest)
local dir = fs.getDir(dest)
if not fs.isDir(dir) then
print("creating directory "..dir)
fs.makeDir(dir)
end
local file,err=fs.open(dest,"wb")
if err then error("fs.open "..err) end
local res,err = http.get{url=src,binary=true}
if err then error("http.get "..err) end
file.write(res.readAll())
file.flush()
file.close()
end
local function dl(pkgname)
local deps = recursive_depsof(pkgname)
local files = recursive_filesof(pkgname)
print("all dependencies: "..fmt_set(deps))
print("all files: "..fmt_set(files))
for file in pairs(files) do
dlfile(file)
end
print"done"
end
if is_required() then
return {manifest=manifest,rd=recursive_depsof,rf=recursive_filesof,dl=dl,cc=clear_cache}
else
for i=1,#arg do
dl(arg[i])
end
end
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