ap/aports.lua: implement recurse_until

will recursively parse all build depends

ap.in

@@ -36,28 +36,11 @@ subcmd.recursdeps = {
 	desc = "Recursively print all make dependencies for given packages",
 	usage = "PKG...",
 	run = function (opts)
-		local i
-		local visited = {}
-		local apkdb, rev = aports.init_apkdb(repodirs)
-		function recurs(pn)
-			if pn == nil or visited[pn] or apkdb[pn] == nil then
-				return
-			end
-			visited[pn] = true
-			local i,d, p
-			for i,p in pairs(apkdb[pn]) do
-				local _, d
-				for _, d in pairs(p.depends) do
-					recurs(d)
-				end
-				for _, d in pairs(p.makedepends) do
-					recurs(d)
-				end
-			end
-			print(pn)
-		end
+		local db, rev = aports.init_apkdb(repodirs)
 		for i = 2, #opts do
-			recurs(opts[i])
+			aports.recurs_until(db, opts[i], function(pn)
+				print(pn)
+			end)
 		end
 	end
 }
@@ -130,6 +113,7 @@ while i <= #arg do
 	i = i + 1
 end
 
+
 cmd = opts[1]
 
 if cmd == nil then

aports.lua

@@ -103,3 +103,45 @@ function init_apkdb(repodirs)
 	return pkgdb, revdeps
 end
 
+-- return a key list with makedepends and depends
+function all_deps(p)
+	local m = {}
+	local k,v
+	if p == nil then
+		return m
+	end
+	if type(p.depends) == "table" then
+		for k,v in pairs(p.depends) do
+			m[v] = true
+		end
+	end
+	if type(p.makedepends) == "table" then
+		for k,v in pairs(p.makedepends) do
+			m[v] = true
+		end
+	end
+	return m
+end
+
+
+function recurs_until(apkdb, pn, func)
+	local visited={}
+	function recurs(pn)
+		if pn == nil or visited[pn] or apkdb[pn] == nil then
+			return false
+		end
+		visited[pn] = true
+		local _, p
+		for _, p in pairs(apkdb[pn]) do
+			local d
+			for d in pairs(all_deps(p)) do
+				if recurs(d) then
+					return true
+				end
+			end
+		end
+		return func(pn)
+	end
+	return recurs(pn)
+end
+