comparison: minify/squish.minify.lua
minify/squish.minify.lua
- changeset 1
- 2d9fe676e684
- child 5
- 6ed9037f4a15
equal
deleted
inserted
replaced
| 0:b119b560ca3d | 1:2d9fe676e684 |
|---|---|
| 1 local optlex = require "optlex" | |
| 2 local optparser = require "optparser" | |
| 3 local llex = require "llex" | |
| 4 local lparser = require "lparser" | |
| 5 | |
| 6 local minify_defaults = { | |
| 7 none = {}; | |
| 8 default = { "comments", "whitespace", "emptylines", "numbers", "locals" }; | |
| 9 basic = { "comments", "whitespace", "emptylines" }; | |
| 10 maximum = { "comments", "whitespace", "emptylines", "eols", "strings", "numbers", "locals", "entropy" }; | |
| 11 } | |
| 12 minify_defaults.full = minify_defaults.maximum; | |
| 13 | |
| 14 for _, opt in ipairs(minify_defaults[opts.minify_level or "default"] or {}) do | |
| 15 opts["minify_"..opt] = true; | |
| 16 end | |
| 17 | |
| 18 local option = { | |
| 19 ["opt-locals"] = opts.minify_locals; | |
| 20 ["opt-comments"] = opts.minify_comments; | |
| 21 ["opt-entropy"] = opts.minify_entropy; | |
| 22 ["opt-whitespace"] = opts.minify_whitespace; | |
| 23 ["opt-emptylines"] = opts.minify_emptylines; | |
| 24 ["opt-eols"] = opts.minify_eols; | |
| 25 ["opt-strings"] = opts.minify_strings; | |
| 26 ["opt-numbers"] = opts.minify_numbers; | |
| 27 } | |
| 28 | |
| 29 local function die(msg) | |
| 30 print("LuaSrcDiet: "..msg); os.exit() | |
| 31 end | |
| 32 | |
| 33 local function load_file(fname) | |
| 34 local INF = io.open(fname, "rb") | |
| 35 if not INF then die("cannot open \""..fname.."\" for reading") end | |
| 36 local dat = INF:read("*a") | |
| 37 if not dat then die("cannot read from \""..fname.."\"") end | |
| 38 INF:close() | |
| 39 return dat | |
| 40 end | |
| 41 | |
| 42 local function save_file(fname, dat) | |
| 43 local OUTF = io.open(fname, "wb") | |
| 44 if not OUTF then die("cannot open \""..fname.."\" for writing") end | |
| 45 local status = OUTF:write(dat) | |
| 46 if not status then die("cannot write to \""..fname.."\"") end | |
| 47 OUTF:close() | |
| 48 end | |
| 49 | |
| 50 | |
| 51 function minify(srcfl, destfl) | |
| 52 local z = load_file(srcfl) | |
| 53 llex.init(z) | |
| 54 llex.llex() | |
| 55 local toklist, seminfolist, toklnlist | |
| 56 = llex.tok, llex.seminfo, llex.tokln | |
| 57 if option["opt-locals"] then | |
| 58 optparser.print = print -- hack | |
| 59 lparser.init(toklist, seminfolist, toklnlist) | |
| 60 local globalinfo, localinfo = lparser.parser() | |
| 61 optparser.optimize(option, toklist, seminfolist, globalinfo, localinfo) | |
| 62 end | |
| 63 optlex.print = print -- hack | |
| 64 toklist, seminfolist, toklnlist | |
| 65 = optlex.optimize(option, toklist, seminfolist, toklnlist) | |
| 66 local dat = table.concat(seminfolist) | |
| 67 -- depending on options selected, embedded EOLs in long strings and | |
| 68 -- long comments may not have been translated to \n, tack a warning | |
| 69 if string.find(dat, "\r\n", 1, 1) or | |
| 70 string.find(dat, "\n\r", 1, 1) then | |
| 71 optlex.warn.mixedeol = true | |
| 72 end | |
| 73 -- save optimized source stream to output file | |
| 74 save_file(destfl, dat) | |
| 75 end | |
| 76 | |
| 77 print_info("Minifying "..out_fn.."..."); | |
| 78 minify(out_fn, out_fn); |
