gitl

#!/usr/bin/env -S uv run --script
# /// script
# requires-python = ">=3.13"
# dependencies = ["rich"]
# ///
import subprocess
import sys
from datetime import datetime
from subprocess import check_output

from rich.console import Console
from rich.text import Text

DEFAULT_LINES = 8

COLORS = {
	"hash": (90, 70, 140),
	"date": (102, 91, 255),
	"time": (79, 164, 255),
	"dim": (60, 60, 80),
	"at": (70, 70, 90),
	"msg": (220, 218, 240),
	"paren": (100, 100, 120),
	"head": (255, 249, 86),
	"main": (104, 244, 255),
	"branch": (79, 255, 249),
}


def make_fader(day_idx):
	fade = max(0.85**day_idx, 0.45) if day_idx > 0 else 1.0

	def apply(name):
		r, g, b = COLORS[name]
		return f"rgb({int(r * fade)},{int(g * fade)},{int(b * fade)})"

	return apply


def parse_commit(line):
	h, year, month, day, hour, minute, msg, branches = line.split(";", 7)
	return {
		"hash": h,
		"date": (int(year), int(month), int(day)),
		"time": (hour, minute),
		"month_day": (month, day),
		"msg": msg,
		"branches": branches.strip().strip("()"),
	}


def format_branches(branches, fade):
	text = Text()
	if not branches:
		return text

	text.append(" (", style=fade("paren"))

	for i, branch in enumerate(branches.split(",")):
		branch = branch.strip()
		if i > 0:
			text.append(", ", style=fade("paren"))

		if " -> " in branch:
			_, branch = branch.split(" -> ")
			text.append("HEAD", style=f"bold {fade('head')}")
			text.append(" -> ", style=fade("paren"))

		is_origin = branch.startswith("origin/")
		name = branch[7:] if is_origin else branch
		base_style = "bold underline" if is_origin else "bold"

		color = "head" if name == "HEAD" else "main" if name in ("main", "master") else "branch"
		text.append(name, style=f"{base_style} {fade(color)}")

	text.append(")", style=fade("paren"))
	return text


def format_datetime(commit, now, fade):
	text = Text()
	year, month, day = commit["date"]
	month_str, day_str = commit["month_day"]
	hour, minute = commit["time"]

	if year < now.year:
		text.append(f"{year}-{month_str}{day_str}", style=fade("time"))
	else:
		same_month = month == now.month
		same_day = same_month and day == now.day

		if same_day:
			text.append(f"{month_str}{day_str}", style=fade("dim"))
		elif same_month:
			text.append(month_str, style=fade("dim"))
			text.append(day_str, style=fade("date"))
		else:
			text.append(f"{month_str}{day_str}", style=fade("date"))

		text.append("@", style=fade("at"))
		text.append(f"{hour}{minute}", style=fade("time"))

	return text


def get_commits(n, console):
	try:
		log = check_output(
			["git", "log", "-n", str(n), "--pretty=format:%h;%cd;%s;%d", "--date=format:%Y;%m;%d;%H;%M"],
			stderr=subprocess.DEVNULL,
		).decode()
	except Exception:
		console.print("gitl: not a git repository (or no commits yet)", style="red")
		return []
	return [parse_commit(line) for line in log.splitlines()] if log else []


def assign_day_indices(commits):
	current_day = None
	day_idx = -1
	for commit in commits:
		if commit["date"] != current_day:
			current_day = commit["date"]
			day_idx += 1
		commit["day_idx"] = day_idx


def main():
	console = Console()
	now = datetime.now()
	today = (now.year, now.month, now.day)

	if len(sys.argv) > 1:
		try:
			commits = get_commits(int(sys.argv[1]), console)
		except ValueError:
			console.print("Usage: gitl [n_lines]", style="red")
			sys.exit(1)
	else:
		commits = get_commits(100, console)
		today_count = sum(1 for c in commits if c["date"] == today)
		commits = commits[: max(DEFAULT_LINES, today_count)]

	if not commits:
		return

	assign_day_indices(commits)

	for commit in commits:
		fade = make_fader(commit["day_idx"])
		text = Text()

		text.append(commit["hash"], style=f"bold {fade('hash')}")
		text.append(" ")
		text.append_text(format_datetime(commit, now, fade))
		text.append(" ")
		text.append(commit["msg"], style=fade("msg"))
		text.append_text(format_branches(commit["branches"], fade))

		console.print(text)


if __name__ == "__main__":
	main()