zulip/tools/setup/build_pygments_data

#!/usr/bin/env python3
import json
import os

from pygments.lexers import get_all_lexers

ZULIP_PATH = os.path.join(os.path.dirname(os.path.abspath(__file__)), "../../")
# The current priorities data set is based on StackOverflow's 2020 survey.
DATA_PATH = os.path.join(ZULIP_PATH, "tools", "setup", "lang.json")
OUT_PATH = os.path.join(ZULIP_PATH, "static", "generated", "pygments_data.json")

with open(DATA_PATH) as f:
    pygments_data = json.load(f)
    priorities = dict(
        **pygments_data["default"], **pygments_data["custom"], **pygments_data["aliases"]
    )

lexers = get_all_lexers()
langs = {
    alias: {
        "priority": priorities.get(alias, 0),
        "pretty_name": longname,
    }
    for longname, aliases, filename_patterns, mimetypes in lexers
    for alias in aliases
}

for name in priorities:
    if langs.get(name) is None:
        langs[name] = {
            "priority": priorities[name],
            "pretty_name": name,
        }

with open(OUT_PATH, "w") as f:
    json.dump({"langs": langs}, f)