­čÉÖ [MIRROR] a Simple gemoji Emoji Extractor (for non macOS users) https://github.com/HorlogeSkynet/SgEExt
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#!/usr/bin/env python3
"""
SgEExt is a Simple gemoji Emoji Extractor script, to download (mostly from GitHub) gemoji PNGs.
The logic is simple but offers some options, just run `[python3] sgeext[.py] -h` to list them.
"""
import argparse
import json
import logging
import os
import re
from shutil import copyfile
from subprocess import check_output, CalledProcessError, DEVNULL
from typing import List, Optional
import requests
# Emojis and "regular" images are served by GitHub here.
GITHUB_ASSETS_BASE_URL = "https://github.githubassets.com/images/icons/emoji/{}.png"
# The emojis database from the gemoji project is hosted here.
EMOJI_DB_URL = "https://github.com/github/gemoji/raw/master/db/emoji.json"
def open_and_load_emojis_db(file_path: str) -> List[dict]:
"""Open `file_path`, load its content as JSON and return it"""
try:
with open(file_path, mode="rb") as f_emojis_db:
emojis_db = json.load(f_emojis_db)
except (FileNotFoundError, json.JSONDecodeError) as error:
emojis_db = []
logging.error("Could not read or load the emojis database : %s.", error)
return emojis_db
def download_file(url: str, path: str = None, force: bool = False, real_name: str = None) -> bool:
"""
Download a file specified by `url` and save it locally under `path`.
Normalize path and / or create non-existing directory structure.
Returns `True` on success, and `False` on error.
See <https://stackoverflow.com/a/16696317/10599709>
"""
if not path:
path = os.getcwd()
elif not os.path.exists(path):
os.makedirs(path, mode=0o755)
# Save this entity under the specified name, or directly its remote name.
if real_name:
file_name = os.path.join(path, real_name + ".png")
else:
file_name = os.path.join(path, url.split("/")[-1])
if not force and os.path.exists(file_name):
# This file already exists, skip it when running non-force mode.
logging.info("The file %s already exists, run `-f` to download it again.", file_name)
return True
logging.info("Downloading <%s> to %s", url, file_name)
with requests.get(url, stream=True) as get_request:
if get_request.status_code != 200:
# This URL does not exist ; Don't try to download a thing !
logging.warning("The URL above does not exist, can't download.")
return False
with open(file_name, "wb") as f_image:
for chunk in get_request.iter_content(chunk_size=8192):
if chunk:
f_image.write(chunk)
f_image.flush()
return True
def localize_emoji_install() -> Optional[str]:
"""Return the root path of the local gemoji gem install, or `None`"""
try:
# Try to retrieve the path of the local installation of Gemoji Ruby gem.
gem_wich_gemoji_output = check_output(
["gem", "which", "gemoji"],
universal_newlines=True,
stderr=DEVNULL,
).strip()
except (FileNotFoundError, CalledProcessError) as error:
# Local gem not available ? Not an issue, we will figure something out.
logging.info("Localization of the gemoji gem installation failed : %s.", error)
return None
# Now, try to extract its grand-parent location.
# Usually `/var/lib/gems/X.Y.Z/gems/gemoji-T.U.V/lib/gemoji.rb` on GNU/Linux.
# Please check <https://github.com/github/gemoji> project structure.
escaped_path_sep = re.escape(os.sep)
gemoji_local_path = re.fullmatch(
rf"^(.+?{escaped_path_sep}gemoji-.+?{escaped_path_sep})lib{escaped_path_sep}gemoji\.rb$",
gem_wich_gemoji_output,
)
if gemoji_local_path is None:
logging.info(
"gemoji looks installed on your system, but couldn't locate it precisely."
" Please open an issue on the project repository."
)
return None
logging.info("Found gemoji gem installation folder : %s", gemoji_local_path.group(1))
return gemoji_local_path.group(1)
def retrieve_emoji_db(gemoji_local_path: str = None) -> List[dict]:
"""
This function tries anyhow to open and load an emoji database.
It may end up locally (see `gemoji_local_path`), or remote (gemoji sources on GitHub).
"""
# Now, let's try to load the emojis database (JSON).
if gemoji_local_path:
return open_and_load_emojis_db(os.path.join(gemoji_local_path + "db", "emoji.json"))
# If we don't have it locally, just temporarily fetch it from the GitHub project.
download_file(EMOJI_DB_URL)
emojis_db_local_file = os.path.join(os.getcwd(), "emoji.json")
emojis_db = open_and_load_emojis_db(emojis_db_local_file)
os.remove(emojis_db_local_file)
logging.info("The temporarily emojis database (%s) has been removed.", emojis_db_local_file)
return emojis_db
def handle_emoji_extraction(
emoji: dict, first_alias: str, path: str, force: bool, real_names: bool
):
"""Simple function reduce `perform_emojis_extraction` cyclomatic complexity"""
# Extract emoji Unicode value, and format it as an hexadecimal string.
code = "".join(format(ord(char), "x") for char in emoji["emoji"])
# Some emojis contain a "variation selector" at the end of their Unicode value.
# VS-15 : U+FE0E || VS-16 : U+FE0F
code = re.sub(r"fe0[ef]$", "", code, re.IGNORECASE)
# For "shrugging" emojis only (`1f937-*`), we have to replace `200d` by a real hyphen.
code = re.sub(r"^(1f937)(?:200d)(.*)$", r"\1-\2", code, re.IGNORECASE)
# For "flags" emojis only (`1f1??1f1??`), we have to add an extra hyphen...
code = re.sub(r"^(1f1)(..)(1f1)(..)$", r"\1\2-\3\4", code, re.IGNORECASE)
logging.info("Inferred %s Unicode value for %s", code, first_alias)
return download_file(
url=GITHUB_ASSETS_BASE_URL.format("unicode/" + code),
path=os.path.join(path, "unicode"),
force=force,
real_name=(first_alias if real_names else None),
)
def handle_github_emojis(
first_alias: str, path: str, force: bool, gemoji_local_path: str = None
) -> bool:
"""Simple function reducing `perform_emojis_extraction` cyclomatic complexity"""
if not gemoji_local_path:
# I told you it was not an issue, let's download it as well !
return download_file(url=GITHUB_ASSETS_BASE_URL.format(first_alias), path=path, force=force)
# We already have it locally somewhere, just copy it...
image_name = first_alias + ".png"
image_local_path = os.path.join(path, image_name)
if not force and os.path.exists(image_local_path):
# This file already exists, skip it when running non-force mode.
logging.info("The file %s already exists, run `-f` to copy it again.", image_local_path)
else:
logging.info("Copying %s from your local system.", image_local_path)
copyfile(os.path.join(gemoji_local_path, "images", image_name), image_local_path)
return True
def perform_emojis_extraction(
path: str, force: bool, subset: List[str], real_names: bool, only_real_emojis: bool
):
"""
Effectively perform the emojis extraction.
By default, run extraction on the whole set.
The `subset` parameter allows the user to provide a specific list of emojis.
"""
gemoji_local_path = localize_emoji_install()
emojis_db = retrieve_emoji_db(gemoji_local_path)
# Iterate over the elements, looking for "real" emojis and "regular" images.
i = 0
for emoji in emojis_db:
if subset:
# Intersect our `subset` names with this emoji's aliases !
# This allows us to "find" emojis whose user-supplied name is an alternative.
# For instance : Match `bow`, even if its "official" name is `bowing_man`.
match_names = set(emoji["aliases"]) & set(subset)
if not match_names:
continue
# The _first_ alias in the list is effectively used to compute its Unicode value.
first_alias = emoji["aliases"][0]
if "emoji" in emoji:
if handle_emoji_extraction(emoji, first_alias, path, force, real_names):
i += 1
elif not only_real_emojis:
# Those are GitHub "fake" emojis ("regular" images).
if handle_github_emojis(first_alias, path, force, gemoji_local_path):
i += 1
if subset:
# The operations above _should_ be OK, we may remove these elements from the set.
for match_name in match_names:
subset.remove(match_name)
if not subset:
# We reached the end of the user-supplied elements. We may stop the iteration.
break
# At this moment, `subset` contains only the elements that have not been found...
if subset:
logging.warning("The following emojis have not been found : %s", "', '".join(subset))
logging.info("Successfully downloaded / copied %i emojis !", i)
def main():
"""Simple entry point"""
parser = argparse.ArgumentParser(
description="A simple gemoji emojis extractor (for non macOS users)"
)
parser.add_argument(
"-d",
"--directory",
type=str,
default=os.path.join(os.getcwd(), "emoji"),
help="Extraction path location",
)
parser.add_argument(
"-f",
"--force",
default=False,
action="store_true",
help="Force file download, even if they already exist",
)
parser.add_argument(
"-l",
"--list",
type=str,
default=[],
nargs="+",
help="List of emojis aliases to operate on",
)
parser.add_argument(
"-n",
"--names",
default=False,
action="store_true",
help='Save emojis under their "real" name instead of Unicode',
)
parser.add_argument(
"-o",
"--only-emojis",
default=False,
action="store_true",
help='Ignores "fake" emojis (images) added by GitHub',
)
parser.add_argument(
"-v",
"--verbose",
default=False,
action="store_true",
help="Show debugging logs and monitor progression",
)
parser.add_argument(
"--version",
action="version",
version="%(prog)s : 2.6.0",
)
# Normalize the user-supplied target directory.
args = parser.parse_args()
# Set format and level for logging.
logging.basicConfig(
format="[%(levelname)s] : %(message)s",
level=(logging.INFO if args.verbose else logging.WARNING),
)
# EXTRACT ALL-THE-THINGS !
perform_emojis_extraction(args.directory, args.force, args.list, args.names, args.only_emojis)
if __name__ == "__main__":
main()