noto-fonts-monochrome-emoji: refactor to use github
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jopejoe1
parent
3f3d631ae2
commit
f6032a8201
@ -1,7 +0,0 @@
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{
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"http://fonts.gstatic.com/s/notoemoji/v47/bMrnmSyK7YY-MEu6aWjPDs-ar6uWaGWuob_10jwvS-FGJCMY.ttf": "sha256-B8XBpYycOYBjrhjlnyiz42YukIoOjGTd3NN3EY00NiQ=",
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"http://fonts.gstatic.com/s/notoemoji/v47/bMrnmSyK7YY-MEu6aWjPDs-ar6uWaGWuob-r0jwvS-FGJCMY.ttf": "sha256-Zfwh9q2GrL5Dwp+J/8Ddd2IXCaUXpQ7dE3CqgCMMyPs=",
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"http://fonts.gstatic.com/s/notoemoji/v47/bMrnmSyK7YY-MEu6aWjPDs-ar6uWaGWuob-Z0jwvS-FGJCMY.ttf": "sha256-/O5b2DzM8g97NAdJgIC/RsQ7E5P7USKq7TXyDuUE3WQ=",
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"http://fonts.gstatic.com/s/notoemoji/v47/bMrnmSyK7YY-MEu6aWjPDs-ar6uWaGWuob911TwvS-FGJCMY.ttf": "sha256-vrjB8GlhzWAe6jG/Srpy8R431VivNtWbCa5Uh4ATnmU=",
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"http://fonts.gstatic.com/s/notoemoji/v47/bMrnmSyK7YY-MEu6aWjPDs-ar6uWaGWuob9M1TwvS-FGJCMY.ttf": "sha256-EbnZt8h4Lcl0yJoOKmXlF1nfcP5hZv7n4cEQ10yBkcg="
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}
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@ -1,30 +0,0 @@
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{
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"kind": "webfonts#webfontList",
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"items": [
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{
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"family": "Noto Emoji",
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"variants": [
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"300",
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"regular",
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"500",
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"600",
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"700"
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],
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"subsets": [
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"emoji"
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],
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"version": "v47",
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"lastModified": "2023-09-27",
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"files": {
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"300": "http://fonts.gstatic.com/s/notoemoji/v47/bMrnmSyK7YY-MEu6aWjPDs-ar6uWaGWuob_10jwvS-FGJCMY.ttf",
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"regular": "http://fonts.gstatic.com/s/notoemoji/v47/bMrnmSyK7YY-MEu6aWjPDs-ar6uWaGWuob-r0jwvS-FGJCMY.ttf",
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"500": "http://fonts.gstatic.com/s/notoemoji/v47/bMrnmSyK7YY-MEu6aWjPDs-ar6uWaGWuob-Z0jwvS-FGJCMY.ttf",
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"600": "http://fonts.gstatic.com/s/notoemoji/v47/bMrnmSyK7YY-MEu6aWjPDs-ar6uWaGWuob911TwvS-FGJCMY.ttf",
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"700": "http://fonts.gstatic.com/s/notoemoji/v47/bMrnmSyK7YY-MEu6aWjPDs-ar6uWaGWuob9M1TwvS-FGJCMY.ttf"
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},
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"category": "sans-serif",
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"kind": "webfonts#webfont",
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"menu": "http://fonts.gstatic.com/s/notoemoji/v47/bMrnmSyK7YY-MEu6aWjPDs-ar6uWaGWuob-r0gwuQeU.ttf"
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}
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]
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}
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@ -1,183 +0,0 @@
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#!/usr/bin/env nix-shell
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#! nix-shell -i "python3 -I" -p python3
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from contextlib import contextmanager
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from pathlib import Path
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from typing import Iterable, Optional
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from urllib import request
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import hashlib, json
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def getMetadata(apiKey: str, family: str = "Noto Emoji"):
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'''Fetch the Google Fonts metadata for a given family.
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An API key can be obtained by anyone with a Google account (🚮) from
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`https://developers.google.com/fonts/docs/developer_api#APIKey`
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'''
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from urllib.parse import urlencode
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with request.urlopen(
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"https://www.googleapis.com/webfonts/v1/webfonts?" +
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urlencode({ 'key': apiKey, 'family': family })
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) as req:
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return json.load(req)
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def getUrls(metadata) -> Iterable[str]:
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'''Fetch all files' URLs from Google Fonts' metadata.
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The metadata must obey the API v1 schema, and can be obtained from:
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https://www.googleapis.com/webfonts/v1/webfonts?key=${GOOGLE_FONTS_TOKEN}&family=${FAMILY}
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'''
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return ( url for i in metadata['items'] for _, url in i['files'].items() )
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def hashUrl(url: str, *, hash: str = 'sha256'):
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'''Compute the hash of the data from HTTP GETing a given `url`.
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The `hash` must be an algorithm name `hashlib.new` accepts.
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'''
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with request.urlopen(url) as req:
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return hashlib.new(hash, req.read())
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def sriEncode(h) -> str:
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'''Encode a hash in the SRI format.
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Takes a `hashlib` object, and produces a string that
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nixpkgs' `fetchurl` accepts as `hash` parameter.
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'''
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from base64 import b64encode
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return f"{h.name}-{b64encode(h.digest()).decode()}"
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def validateSRI(sri: Optional[str]) -> Optional[str]:
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'''Decode an SRI hash, return `None` if invalid.
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This is not a full SRI hash parser, hash options aren't supported.
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'''
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from base64 import b64decode
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if sri is None:
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return None
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try:
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hashName, b64 = sri.split('-', 1)
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h = hashlib.new(hashName)
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digest = b64decode(b64, validate=True)
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assert len(digest) == h.digest_size
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except:
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return None
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else:
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return sri
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def hashUrls(
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urls: Iterable[str],
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knownHashes: dict[str, str] = {},
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) -> dict[str, str]:
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'''Generate a `dict` mapping URLs to SRI-encoded hashes.
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The `knownHashes` optional parameter can be used to avoid
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re-downloading files whose URL have not changed.
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'''
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return {
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url: validateSRI(knownHashes.get(url)) or sriEncode(hashUrl(url))
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for url in urls
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}
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@contextmanager
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def atomicFileUpdate(target: Path):
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'''Atomically replace the contents of a file.
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Yields an open file to write into; upon exiting the context,
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the file is closed and (atomically) replaces the `target`.
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Guarantees that the `target` was either successfully overwritten
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with new content and no exception was raised, or the temporary
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file was cleaned up.
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'''
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from tempfile import mkstemp
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fd, _p = mkstemp(
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dir = target.parent,
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prefix = target.name,
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)
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tmpPath = Path(_p)
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try:
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with open(fd, 'w') as f:
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yield f
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tmpPath.replace(target)
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except Exception:
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tmpPath.unlink(missing_ok = True)
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raise
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if __name__ == "__main__":
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from os import environ
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from urllib.error import HTTPError
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environVar = 'GOOGLE_FONTS_TOKEN'
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currentDir = Path(__file__).parent
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metadataPath = currentDir / 'noto-emoji.json'
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try:
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apiToken = environ[environVar]
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metadata = getMetadata(apiToken)
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except (KeyError, HTTPError) as exn:
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# No API key in the environment, or the query was rejected.
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match exn:
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case KeyError if exn.args[0] == environVar:
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print(f"No '{environVar}' in the environment, "
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"skipping metadata update")
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case HTTPError if exn.getcode() == 403:
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print("Got HTTP 403 (Forbidden)")
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if apiToken != '':
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print("Your Google API key appears to be valid "
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"but does not grant access to the fonts API.")
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print("Aborting!")
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raise SystemExit(1)
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case HTTPError if exn.getcode() == 400:
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# Printing the supposed token should be fine, as this is
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# what the API returns on invalid tokens.
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print(f"Got HTTP 400 (Bad Request), is this really an API token: '{apiToken}' ?")
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case _:
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# Unknown error, let's bubble it up
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raise
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# In that case just use the existing metadata
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with metadataPath.open() as metadataFile:
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metadata = json.load(metadataFile)
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lastModified = metadata["items"][0]["lastModified"];
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print(f"Using metadata from file, last modified {lastModified}")
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else:
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# If metadata was successfully fetched, validate and persist it
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lastModified = metadata["items"][0]["lastModified"];
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print(f"Fetched current metadata, last modified {lastModified}")
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with atomicFileUpdate(metadataPath) as metadataFile:
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json.dump(metadata, metadataFile, indent = 2)
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metadataFile.write("\n") # Pacify nixpkgs' dumb editor config check
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hashPath = currentDir / 'noto-emoji.hashes.json'
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try:
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with hashPath.open() as hashFile:
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hashes = json.load(hashFile)
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except FileNotFoundError:
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hashes = {}
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with atomicFileUpdate(hashPath) as hashFile:
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json.dump(
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hashUrls(getUrls(metadata), knownHashes = hashes),
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hashFile,
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indent = 2,
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)
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hashFile.write("\n") # Pacify nixpkgs' dumb editor config check
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@ -1,46 +1,32 @@
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{ lib
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, stdenvNoCC
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, fetchurl
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, fetchFromGitHub
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, rename
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}:
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# Metadata fetched from
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# https://www.googleapis.com/webfonts/v1/webfonts?key=${GOOGLE_FONTS_TOKEN}&family=Noto+Emoji
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let
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metadata = with builtins; head (fromJSON (readFile ./noto-emoji.json)).items;
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urlHashes = with builtins; fromJSON (readFile ./noto-emoji.hashes.json);
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in
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stdenvNoCC.mkDerivation {
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pname = "noto-fonts-monochrome-emoji";
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version = "${lib.removePrefix "v" metadata.version}.${metadata.lastModified}";
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preferLocalBuild = true;
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version = "3.000";
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dontUnpack = true;
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srcs =
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let
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weightNames = {
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"300" = "Light";
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regular = "Regular";
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"500" = "Medium";
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"600" = "SemiBold";
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"700" = "Bold";
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};
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in
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lib.mapAttrsToList
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(variant: url: fetchurl {
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name = "NotoEmoji-${weightNames.${variant}}.ttf";
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hash = urlHashes.${url};
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inherit url;
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})
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metadata.files;
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src = fetchFromGitHub {
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owner = "google";
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repo = "fonts";
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rev = "a73b9ab0a5df191bcfed817159a903911ea7958a";
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hash = "sha256-qVFU4uZius8oFPJCIL9ek2YdS3jru5mmTHp2L9RIXfg=";
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sparseCheckout = [ "ofl/notoemoji" ];
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};
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installPhase = ''
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runHook preInstall
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for src in $srcs; do
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install -D $src $out/share/fonts/noto/$(stripHash $src)
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done
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install -m444 -Dt $out/share/fonts/noto ofl/notoemoji/*.ttf
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${rename}/bin/rename 's/\[.*\]//' $out/share/fonts/noto/*
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runHook postInstall
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'';
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passthru.updateScript = ./update.sh;
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meta = {
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description = "Monochrome emoji font";
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homepage = "https://fonts.google.com/noto/specimen/Noto+Emoji";
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25
pkgs/by-name/no/noto-fonts-monochrome-emoji/update.sh
Executable file
25
pkgs/by-name/no/noto-fonts-monochrome-emoji/update.sh
Executable file
@ -0,0 +1,25 @@
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#!/usr/bin/env nix-shell
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#! nix-shell -i bash -p common-updater-scripts git nix-prefetch
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tmpdir=$(mktemp -d)
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git -C "$tmpdir" init --initial-branch main
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git -C "$tmpdir" config core.sparseCheckout true
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git -C "$tmpdir" remote add origin https://github.com/google/fonts.git
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echo "ofl/notoemoji/*" > "$tmpdir/.git/info/sparse-checkout"
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git -C "$tmpdir" fetch origin main
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git -C "$tmpdir" checkout main
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newrev=$(git -C "$tmpdir" rev-list -1 HEAD "ofl/notoemoji/*.ttf")
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newver=$(grep 'archive:' "$tmpdir/ofl/notoemoji/upstream.yaml" | grep -oP '(?<=v)[0-9]+\.[0-9]+')
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newhash=$(nix-prefetch "{ stdenv, fetchurl }: stdenv.mkDerivation rec {
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name = \"noto-fonts-cjk-serif\";
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src = fetchFromGitHub {
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owner = \"google\";
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repo = \"fonts\";
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rev = \"$newrev\";
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sparseCheckout = [ \"ofl/notoemoji\" ];
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};
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}")
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update-source-version noto-fonts-monochrome-emoji "$newver" "$newhash" --rev="$newrev"
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