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fix the .foreach syntax: remembering to push edition

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bleck9999 2021-08-05 00:09:24 +01:00
parent b678673d95
commit 87ae4aac62
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1 changed files with 41 additions and 31 deletions
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72
ts-minifier.py
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@ -1,6 +1,6 @@
# Copyright (c) 2021 bleck9999
# https://github.com/bleck9999/ts-minifier
# Version: a1e97807
# Version: 2a214f53
import argparse
import itertools
@ -35,7 +35,6 @@ class Code:
self.strings = strings
self.comments = comments
self.code = code
# self.string_comments = strings_comments
self.rawcode = "".join([x[2] for x in sorted(self.code+self.strings)])
def getafter(self, ch: int):
@ -94,23 +93,9 @@ def parser(script: str):
script = Code(strings, comments, script)
# guess i should do a breakdown of step 3
# we need to be able to read:
# variable creation | a = 15, array.foreach("a")
# defining a function | funcname = {function body}
# calling a function | funcname(arguments) for stdlib functions, funcname(<optional> any valid ts) for user defined
# member calling | object.member(possible args)
# we don't need to check if it's valid syntax or not so we dont need to know the type of object that's nice
# this can actually be chained which is pretty annoying
# operators? i dont think it actually matters to us
# *statements* | a
# these can be delimited by anything that isn't a valid identifier.
# fuck me clockwise
#
# other notes:
# we minify the script a little before parsing, so there is no unnecessary whitespace or comments
# we are assuming the input script is valid syntax
# couple notes:
# we minify the script a little before parsing, so there is no unnecessary whitespace or comments
# we are assuming the input script is valid syntax
userobjects = {}
usages = {}
hexxed = False
@ -146,10 +131,7 @@ def parser(script: str):
if identifier not in stdlib:
userobjects[identifier] = "var"
if strscript[ch] == '.':
if ismember: # we check if there's a . after a ), if there is we know that there's nothing to do here
continue
ismember = True
# we don't really care about anything else
elif strscript[ch] == '(':
if ismember:
if "foreach" == strscript[start:ch]: # array.foreach takes a variable name as an arg (blame meme)
@ -157,7 +139,10 @@ def parser(script: str):
if name in userobjects:
usages[name].append(start)
else:
usages[name] = []
# this is fucking disgusting
usages[name] = [script.getafter(ch)[0] + 1 # start index of the quote, +1 to account for "
- (script.comments[-1][1] # correct for strscript removing comments
if script.comments else 0)] # (if any are present at all)
userobjects[name] = "var"
else:
pass
@ -172,6 +157,7 @@ def minify(script: Code, userobjects, usages):
# the space saved by an alias is the amount of characters currently used by calling the function (uses*len(func))
# minus the amount of characters it would take to define an alias (len(alias)+len(func)+2), with the 2 being the
# equals and the whitespace needed for a definition
#
# obviously for a rename you're already defining it so it's just the difference between lengths multiplied by uses
short_idents = [x for x in (ascii_letters+'_')] + [x[0]+x[1] for x in itertools.permutations(ascii_letters+'_', 2)]
short_idents.pop(short_idents.index("if"))
@ -200,7 +186,7 @@ def minify(script: Code, userobjects, usages):
continue
# we assume that nobody is insane enough to exhaust all *2,756* 2 character names,
# instead that uo is len 2 and all the 1 character names are in use (because of that we dont multiply
# uses by anything
# uses by anything as multiplying by a difference of 1 would be redundant)
if not auto_replace:
print(f"{'Function' if otype == 'func' else 'Variable'} name {uo} could be shortened ({uo}->{minName}, "
f"would save {uses*(uolen - len(minName))} bytes")
@ -211,10 +197,19 @@ def minify(script: Code, userobjects, usages):
# rather than just blindly str.replace()ing we're going to actually use the character indices that we stored
diff = uolen - len(minName)
prev = 0
# we're specifically looking for variables declared with the .foreach bullshit so we can ignore any functions
if otype == "var":
for i, string in enumerate([x for x in script.strings]):
if string[2] == f'"{uo}"':
# you might think im forgetting to account for the shorter minName by leaving string[1]
# but you are wrong this is intentional
script.strings[i] = (string[0], string[1], f'"{minName}"')
for bound in usages[uo]:
tmpcode += mcode[prev:bound] + minName + ' '*diff
prev = bound + diff + len(minName)
mcode = tmpcode + mcode[bound+diff+len(minName):] # it actually cant be referenced before assignment but ok
# actually shut up about "bound might be referenced before assignment" or show me what possible
# execution path that could lead to usages[uo] being an empty list
mcode = tmpcode + mcode[bound+diff+len(minName):]
for func in usages:
tmpcode = ""
candidates = short_idents
@ -256,12 +251,27 @@ def minify(script: Code, userobjects, usages):
str_reuse[string[2]].append(string[0])
else:
str_reuse[string[2]] = [string[0]]
for string in str_reuse:
for string in script.strings:
tmpcode = ""
candidates = short_idents
uses = len(str_reuse[string])
minName = ""
if uses > 1 and len(string) > 1:
uses = len(str_reuse[string[2]])
if string[2].replace('"', '') in userobjects:
# im a little worried about some corner case where you for whatever reason had a string of "varName"
# just vibin somewhere in the script on its own for whatever reason completely beyond sanity
# and then *also* used varName to declare a var with a .foreach
# but i've lost the ability to give a shit
start = string[0] - (script.comments[-1][1] if script.comments else 0)
end = string[1] - (script.comments[-1][1] if script.comments else 0)
# newend is essentially start + len(minName) + 1 (+1 because we only exclude the trailing ")
newend = start + len(string[2]) - 1
# you might be wondering why the +1 and -1 are there
# so am i but removing them breaks things and i spent like 30 minutes trying to get this to work
tmpcode = mcode[:newend] + '"' + mcode[newend+1:]
tmpcode = tmpcode[:end-1] + ' ' + tmpcode[end:]
mcode = tmpcode
elif uses > 1 and len(string[2]) > 1:
string = string[2]
if len(string) == 2:
candidates = short_idents[:53]
for i in candidates:
@ -292,7 +302,7 @@ def minify(script: Code, userobjects, usages):
def whitespacent(script: str):
# also happens to remove unneeded comments and push REQUIREs to the top of the file
# also removes unneeded comments and push REQUIREs to the top of the file
requires = ""
mcode = ""
for line in script.split(sep='\n'):
@ -309,7 +319,7 @@ def whitespacent(script: str):
# the last character of the line which would lead to several issues
# however this is desirable when there *is* a comment, since it being exclusive means there isn't a trailing #
# and if you're wondering about the above check that uses line[start:] this doesn't matter,
# one character cant contain an 8 character substring
# one character cant contain an 8 character substring so it's not like it'll ever false positive
if start != -1:
line = line[:start]
line = line.split(sep='"')
@ -334,7 +344,7 @@ def whitespacent(script: str):
# 1. the - operator which requires space between the right operand
# yeah that's right only the right one
# thanks meme
# 2. between 2 letters
# 2. between 2 characters that are either valid identifiers (aA-zZ or _) or integers
inquote = False
mmcode = ""
index = 0