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devicon/.github/scripts/check_svgs_on_pr.py
2021-02-21 20:15:28 -08:00

101 lines
3.7 KiB
Python

from enum import Enum
from typing import List
import xml.etree.ElementTree as et
from pathlib import Path
# pycharm complains that build_assets is an unresolved ref
# don't worry about it, the script still runs
from build_assets import filehandler, arg_getters
from build_assets import util
class SVG_STATUS_CODE(Enum):
"""
The status codes to check for in post_check_svgs_comment.yml
"""
NO_SVG = 0 # action: do nothing
SVG_OK = 1 # action: let user know their svgs are fine
def main():
"""
Check the quality of the svgs.
If any svg error is found, create a json file called 'svg_err_messages.json'
in the root folder that will contains the error messages.
"""
args = arg_getters.get_check_svgs_on_pr_args()
try:
# check the svgs
svgs = filehandler.get_added_modified_svgs(args.files_added_json_path,
args.files_modified_json_path)
print("SVGs to check: ", *svgs, sep='\n')
if len(svgs) == 0:
print("No SVGs to check, ending script.")
err_messages = SVG_STATUS_CODE.NO_SVG.value
else:
err_messages = check_svgs(svgs)
filehandler.write_to_file("./svg_err_messages.txt", str(err_messages))
print("Task completed.")
except Exception as e:
util.exit_with_err(e)
def check_svgs(svg_file_paths: List[Path]):
"""
Check the width, height, viewBox and style of each svgs passed in.
The viewBox must be '0 0 128 128'.
If the svg has a width and height attr, ensure it's '128px'.
The style must not contain any 'fill' declarations.
If any error is found, they will be thrown.
:param: svg_file_paths, the file paths to the svg to check for.
:return: None if there no errors. If there is, return a JSON.stringified
list with the error messages in it.
"""
# batch err messages together so user can fix everything at once
err_msgs = []
for svg_path in svg_file_paths:
tree = et.parse(svg_path)
root = tree.getroot()
namespace = "{http://www.w3.org/2000/svg}"
err_msg = [f"{svg_path}:"]
if root.tag != f"{namespace}svg":
err_msg.append(f"-root is '{root.tag}'. Root must be an 'svg' element")
if root.get("viewBox") != "0 0 128 128":
err_msg.append("-'viewBox' is not '0 0 128 128' -> Set it or scale the file using https://www.iloveimg.com/resize-image/resize-svg")
acceptable_size = [None, "128px", "128"]
if root.get("height") not in acceptable_size:
err_msg.append("-'height' is present in svg element but is not '128' or '128px' -> Remove it or set it to '128' or '128px'")
if root.get("width") not in acceptable_size:
err_msg.append("-'width' is present in svg element but is not '128' or '128px' -> Remove it or set it to '128' or '128px'")
if root.get("style") is not None and "enable-background" in root.get("style"):
err_msg.append("-deprecated 'enable-background' in style attribute -> Remove it")
if root.get("x") is not None:
err_msg.append("-unneccessary 'x' attribute in svg element -> Remove it")
if root.get("y") is not None:
err_msg.append("-unneccessary 'y' attribute in svg element -> Remove it")
style = root.findtext(f".//{namespace}style")
if style != None and "fill" in style:
err_msg.append("-contains style declaration using 'fill' -> Replace classes with the 'fill' attribute instead")
if len(err_msg) > 1:
err_msgs.append("\n".join(err_msg))
if len(err_msgs) > 0:
return "\n\n".join(err_msgs)
return SVG_STATUS_CODE.SVG_OK.value
if __name__ == "__main__":
main()