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| 1 | +#!/usr/bin/env lua |
| 2 | + |
| 3 | +local function Squish(fileName) |
| 4 | + local f, e = io.open(fileName, "r") |
| 5 | + if not f then |
| 6 | + print(e) |
| 7 | + return |
| 8 | + end |
| 9 | + local function tokenizeFile(file) |
| 10 | + local data, tokens, pos = file:read("all"), {}, 1 |
| 11 | + |
| 12 | + if data:sub(1, 2) == "#!" then |
| 13 | + local lineEnd = data:find("\n", 1) or #data + 1 |
| 14 | + table.insert(tokens, {type = "shebang", value = data:sub(1, lineEnd - 1)}) |
| 15 | + pos = lineEnd |
| 16 | + end |
| 17 | + |
| 18 | + while pos <= #data do |
| 19 | + local c = data:sub(pos, pos) |
| 20 | + |
| 21 | + -- Handle comments |
| 22 | + if c == "-" and data:sub(pos, pos + 1) == "--" then |
| 23 | + local commentStart = pos |
| 24 | + -- Check for multi-line comment |
| 25 | + if data:sub(pos + 2, pos + 3) == "[[" then |
| 26 | + local commentEnd = data:find("]]", pos + 4, true) |
| 27 | + if commentEnd then |
| 28 | + table.insert(tokens, {type = "comment", value = data:sub(commentStart, commentEnd + 1)}) |
| 29 | + pos = commentEnd + 2 |
| 30 | + else |
| 31 | + -- Unclosed comment, treat as single line |
| 32 | + local lineEnd = data:find("\n", pos) or #data + 1 |
| 33 | + table.insert(tokens, {type = "comment", value = data:sub(commentStart, lineEnd - 1)}) |
| 34 | + pos = lineEnd |
| 35 | + end |
| 36 | + -- Standard single-line comment |
| 37 | + else |
| 38 | + local lineEnd = data:find("\n", pos) or #data + 1 |
| 39 | + table.insert(tokens, {type = "comment", value = data:sub(commentStart, lineEnd - 1)}) |
| 40 | + pos = lineEnd |
| 41 | + end |
| 42 | + |
| 43 | + -- Handle strings with double quotes |
| 44 | + elseif c == '"' then |
| 45 | + local stringStart = pos |
| 46 | + pos = pos + 1 |
| 47 | + while pos <= #data do |
| 48 | + if data:sub(pos, pos) == '"' and data:sub(pos - 1, pos - 1) ~= "\\" then |
| 49 | + break |
| 50 | + elseif data:sub(pos, pos) == "\\" and pos < #data then |
| 51 | + pos = pos + 2 -- Skip escaped character |
| 52 | + else |
| 53 | + pos = pos + 1 |
| 54 | + end |
| 55 | + end |
| 56 | + if pos <= #data then |
| 57 | + table.insert(tokens, {type = "string", value = data:sub(stringStart, pos)}) |
| 58 | + pos = pos + 1 |
| 59 | + else |
| 60 | + -- Unclosed string, treat as code (this is an error in Lua) |
| 61 | + table.insert(tokens, {type = "code", value = data:sub(stringStart, pos - 1)}) |
| 62 | + end |
| 63 | + |
| 64 | + -- Handle strings with single quotes |
| 65 | + elseif c == "'" then |
| 66 | + local stringStart = pos |
| 67 | + pos = pos + 1 |
| 68 | + while pos <= #data do |
| 69 | + if data:sub(pos, pos) == "'" and data:sub(pos - 1, pos - 1) ~= "\\" then |
| 70 | + break |
| 71 | + elseif data:sub(pos, pos) == "\\" and pos < #data then |
| 72 | + pos = pos + 2 -- Skip escaped character |
| 73 | + else |
| 74 | + pos = pos + 1 |
| 75 | + end |
| 76 | + end |
| 77 | + if pos <= #data then |
| 78 | + table.insert(tokens, {type = "string", value = data:sub(stringStart, pos)}) |
| 79 | + pos = pos + 1 |
| 80 | + else |
| 81 | + -- Unclosed string, treat as code (this is an error in Lua) |
| 82 | + table.insert(tokens, {type = "code", value = data:sub(stringStart, pos - 1)}) |
| 83 | + end |
| 84 | + |
| 85 | + -- Handle long bracket strings |
| 86 | + elseif c == "[" and data:sub(pos, pos + 1):match("%[=*%[") then |
| 87 | + local stringStart = pos |
| 88 | + local openBracket = data:match("%[=*%[", pos) |
| 89 | + local closeBracket = openBracket:gsub("%[", "]") |
| 90 | + local stringEnd = data:find(closeBracket, pos + #openBracket, true) |
| 91 | + |
| 92 | + if stringEnd then |
| 93 | + table.insert(tokens, {type = "string", value = data:sub(stringStart, stringEnd + #closeBracket - 1)}) |
| 94 | + pos = stringEnd + #closeBracket |
| 95 | + else |
| 96 | + -- Unclosed long bracket, treat as code (this is an error in Lua) |
| 97 | + table.insert(tokens, {type = "code", value = data:sub(stringStart, pos)}) |
| 98 | + pos = pos + 1 |
| 99 | + end |
| 100 | + |
| 101 | + -- Handle normal code |
| 102 | + else |
| 103 | + local codeStart = pos |
| 104 | + while pos <= #data do |
| 105 | + local next_char = data:sub(pos, pos) |
| 106 | + if next_char == "-" and data:sub(pos, pos + 1) == "--" or |
| 107 | + next_char == '"' or next_char == "'" or |
| 108 | + (next_char == "[" and data:sub(pos, pos + 1):match("%[=*%[")) then |
| 109 | + break |
| 110 | + end |
| 111 | + pos = pos + 1 |
| 112 | + end |
| 113 | + |
| 114 | + if codeStart < pos then |
| 115 | + table.insert(tokens, {type = "code", value = data:sub(codeStart, pos - 1)}) |
| 116 | + end |
| 117 | + end |
| 118 | + end |
| 119 | + return tokens |
| 120 | + end |
| 121 | + |
| 122 | + local function removeWhiteSpace(tokens) |
| 123 | + for _, token in ipairs(tokens) do |
| 124 | + if token.type == "code" then |
| 125 | + token.value = token.value:gsub("%s+", " ") -- Replace multiple spaces with a single space |
| 126 | + token.value = token.value:gsub("%s*([%(%){},;=%+%-%*/%^])%s*", "%1") -- Remove spaces around operators and punctuation |
| 127 | + token.value = token.value:gsub("^%s+", "") -- Remove leading whitespace |
| 128 | + token.value = token.value:gsub("%s+$", "") -- Remove trailing whitespace |
| 129 | + end |
| 130 | + end |
| 131 | + end |
| 132 | + |
| 133 | + local tokens = tokenizeFile(f) |
| 134 | + |
| 135 | + -- Get the size of the script before any squishing |
| 136 | + local beforeSize = f:seek() |
| 137 | + f:close() |
| 138 | + removeWhiteSpace(tokens) |
| 139 | + |
| 140 | + -- Include the shebang on its own line if there is one |
| 141 | + local data = #tokens > 0 and tokens[1].type == "shebang" and table.remove(tokens, 1).value .. '\n' or "" |
| 142 | + |
| 143 | + -- Concatenate data together |
| 144 | + for _, token in ipairs(tokens) do |
| 145 | + if token.type ~= "comment" then data = data .. token.value end |
| 146 | + end |
| 147 | + print(data) |
| 148 | +end |
| 149 | + |
| 150 | +for _,v in ipairs(arg) do Squish(v) end |
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