compression package wip + debugger bugfixes

compress/untar.lua

@@ -0,0 +1,46 @@
+-- see: https://github.com/luarocks/luarocks/blob/master/src/luarocks/tools/tar.lua
+
+-- TODO: support normal tar syntax -- tar xvf
+
+local DEFLATE = require('compress.deflatelua')
+local tar     = require('compress.tar')
+
+local fs    = _G.fs
+local io    = _G.io
+local shell = _ENV.shell
+
+local args = { ... }
+
+if not args[2] then
+	error('Syntax: tar FILE DESTDIR')
+end
+
+local inFile = shell.resolve(args[1])
+local outDir = shell.resolve(args[2])
+
+if inFile:match('(.+)%.[gG][zZ]$') then
+	local TMP_FILE = '.out.tar'
+
+	local fh = io.open(inFile, 'rb') or error('Error opening ' .. inFile)
+
+	fs.mount(TMP_FILE, 'ramfs', 'file')
+	local ofh = io.open(TMP_FILE, 'wb')
+
+	DEFLATE.gunzip {input=fh, output=ofh, disable_crc=true}
+
+	fh:close()
+	ofh:close()
+
+	local s, m = tar.untar(TMP_FILE, outDir, true)
+
+	fs.delete(TMP_FILE)
+
+	if not s then
+		error(m)
+	end
+else
+	local s, m = tar.untar(inFile, outDir)
+	if not s then
+		error(m)
+	end
+end