From cfc654d9db45eeb6efc1745f855d7eb3341644b1 Mon Sep 17 00:00:00 2001
From: ubq323 <ubq323@ubq323.website>
Date: Thu, 4 Aug 2022 00:01:30 +0100
Subject: pm

---
 pm.lua | 74 ++++++++++++++++++++++++++++++++++++++++++++++--------------------
 1 file changed, 52 insertions(+), 22 deletions(-)

diff --git a/pm.lua b/pm.lua
index 1c497b1..62cfed9 100644
--- a/pm.lua
+++ b/pm.lua
@@ -6,44 +6,74 @@ local function perr(err,what)
 	if err then error(what..": "..err) end
 end
 
+local _manifests = {}
 local function manifest(pkgname)
+	if _manifests[pkgname] then return _manifests[pkgname] end
 	print("fetching manifest of '"..pkgname.."'...")
-	local res,err = http.get(rbase..pkgname..".dat")
-	perr(err,"http.get")
+
 	local files={}
 	local files_present=false
 	local deps={}
-	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
+
+	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]=true end
-	return {files=files,deps=deps}
+	
+	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)
+		print("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
+	F(pkgname)
+	return deps
+end
 
-local function dl(filename)
-	local file,err=fs.open("/"..filename..".lua","w")
+local function dlfile(filename)
+	local file,err=fs.open("/"..filename,"w")
 	if err then error("fs.open "..err) end
-	local res,err = http.get("https://g.gh0.pw/ccprogs/plain/"..filename..".lua")
+	local res,err = http.get("https://g.gh0.pw/ccprogs/plain/"..filename)
 	if err then error("http.get "..err) end
 	file.write(res.readAll())
 	file.flush()
 	file.close()
 end
 
-return manifest
+return {manifest=manifest,rd=recursive_depsof}
 --dl(arg[1])
-- 
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