Thu, 27 May 2010 04:01:04 +0100
gzip: Add support for gzipping output files, based on a very hacked compress.deflatelua by David Manura
function gzip_file(infile_fn, outfile_fn) local infile, err = io.open(infile_fn); if not infile then print_err("Can't open input file for reading: "..tostring(err)); return; end local outfile, err = io.open(outfile_fn..".gzipped", "w+"); if not outfile then print_err("Can't open output file for writing: "..tostring(err)); return; end local data = infile:read("*a"); infile:close(); local shebang, newdata = data:match("^(#.-\n)(.+)$"); local code = newdata or data; if shebang then outfile:write(shebang) end local compressed = io.popen("gzip -c '"..infile_fn.."'"); code = compressed:read("*a"); local maxequals = 0; code:gsub("(=+)", function (equals_string) maxequals = math.max(maxequals, #equals_string); end); outfile:write(require_resource "gunzip.lua"); outfile:write[[function _gunzip(data) local uncompressed = {}; gunzip{input=data,output=function(b) table.insert(uncompressed, string.char(b)) end}; return table.concat(uncompressed, ""); end ]]; outfile:write [[return assert(loadstring(_gunzip]] outfile:write(string.format("%q", code)); --outfile:write("[", string.rep("=", maxequals+1), "[", code, "]", string.rep("=", maxequals+1), "]"); outfile:write(", '@", outfile_fn,"'))()"); outfile:close(); os.rename(outfile_fn..".gzipped", outfile_fn); end if opts.gzip then print_info("Gzipping "..out_fn.."..."); gzip_file(out_fn, out_fn); print_info("OK!"); end