diff options
| -rw-r--r-- | README.md | 8 | ||||
| -rwxr-xr-x | preview | 94 | ||||
| -rw-r--r-- | theme.txt.in | 20 |
3 files changed, 111 insertions, 11 deletions
@@ -48,9 +48,13 @@ and Inconsolata Nerd Font Mono. ## Test ./build --selftest + ./preview # headless, screenshot to dist/preview.png + ./preview --live # QEMU window: move through the menu, 'c' for the console + ./preview 1920x1080 # another mode -There is no GRUB emulator here, so the visual check is a reboot. Keep the -previous `GRUB_THEME` line to go back to. +`preview` boots `dist/udt` in real GRUB (x86_64-efi) under QEMU and OVMF, with +stand-in menu entries, so the theme can be checked before root installs it. +It needs `qemu-system-x86_64`, OVMF in `/usr/share/OVMF` and `grub-mkimage`. ## License @@ -0,0 +1,94 @@ +#!/usr/bin/env python3 +# preview: boot dist/udt in real GRUB under QEMU, before root installs it. +# Copyright (C) 2026 Danilo M. <danix@danix.xyz> +# Licensed under the GNU General Public License v2 only. +"""Boot the built theme in GRUB x86_64-efi under QEMU and OVMF. + +Usage: preview [--live] [WIDTHxHEIGHT] + +Default: screenshot to dist/preview.png, headless. --live opens a QEMU +window instead, to move through the menu and try the console ('c'). +The mode defaults to 2560x1080. The menu entries are stand-ins. +""" +import shutil +import socket +import subprocess +import sys +import tempfile +import time +from pathlib import Path + +REPO = Path(__file__).resolve().parent +THEME = REPO / "dist" / "udt" +SHOT = REPO / "dist" / "preview.png" +OVMF = Path("/usr/share/OVMF") +MODULES = ("part_gpt part_msdos fat normal configfile all_video efi_gop gfxterm " + "gfxmenu png jpeg font true").split() +BOOT_WAIT = 12 # ponytail: fixed wait for OVMF + GRUB; raise it if the shot is blank +CFG = """\ +insmod all_video +insmod gfxterm +set gfxmode={mode},auto +terminal_output gfxterm +{fonts} +set theme=($root)/boot/grub/themes/udt/theme.txt +set timeout=30 +menuentry 'Slackware (preview)' --class slackware --class os {{ true }} +submenu 'Advanced options for Slackware' {{ menuentry 'Recovery' {{ true }} }} +menuentry 'UEFI Firmware Settings' --class efi {{ true }} +""" + + +def main(): + args = sys.argv[1:] + live = "--live" in args + args = [a for a in args if a != "--live"] + mode = args[0] if args else "2560x1080" + xres, yres = mode.split("x") + if not (THEME / "theme.txt").exists(): + sys.exit("preview: dist/udt missing; run ./build first") + with tempfile.TemporaryDirectory() as tmp: + tmp = Path(tmp) + root = tmp / "esp" + grub = root / "boot/grub" + (root / "EFI/BOOT").mkdir(parents=True) + shutil.copytree(THEME, grub / "themes/udt") + # grub-mkconfig writes one loadfont per .pf2 in the theme dir; do the same. + fonts = "\n".join(f"loadfont ($root)/boot/grub/themes/udt/{f.name}" + for f in sorted(THEME.glob("*.pf2"))) + (grub / "grub.cfg").write_text(CFG.format(mode=mode, fonts=fonts)) + subprocess.run(["grub-mkimage", "-O", "x86_64-efi", "-p", "/boot/grub", + "-o", str(root / "EFI/BOOT/BOOTX64.EFI"), *MODULES], check=True) + vars_fd = tmp / "vars.fd" + vars_fd.write_bytes((OVMF / "OVMF_VARS.fd").read_bytes()) + mon = tmp / "mon.sock" + cmd = ["qemu-system-x86_64", "-machine", "q35", "-m", "512", + "-drive", f"if=pflash,format=raw,readonly=on,file={OVMF / 'OVMF_CODE.fd'}", + "-drive", f"if=pflash,format=raw,file={vars_fd}", + "-drive", f"file=fat:rw:{root},format=raw", + "-vga", "none", "-device", f"VGA,edid=on,xres={xres},yres={yres}"] + if live: + return subprocess.run(cmd).returncode + q = subprocess.Popen(cmd + ["-display", "none", "-monitor", f"unix:{mon},server,nowait"]) + try: + time.sleep(BOOT_WAIT) + s = socket.socket(socket.AF_UNIX) + s.connect(str(mon)) + ppm = tmp / "shot.ppm" + s.sendall(f"screendump {ppm}\n".encode()) + for _ in range(50): # the dump is written asynchronously + if ppm.exists() and ppm.stat().st_size: + break + time.sleep(0.2) + time.sleep(0.5) + s.sendall(b"quit\n") + q.wait(timeout=10) + finally: + if q.poll() is None: + q.kill() + subprocess.run(["magick", str(ppm), str(SHOT)], check=True) + print(f"preview: {SHOT}") + + +if __name__ == "__main__": + main() diff --git a/theme.txt.in b/theme.txt.in index 91cda7d..b864a86 100644 --- a/theme.txt.in +++ b/theme.txt.in @@ -18,15 +18,6 @@ terminal-width: "100%" terminal-height: "100%" terminal-border: "0" -# The panel: bg_alt at ~85% alpha, stretched over the left quarter. -+ image { - left = 0 - top = 0 - width = 25% - height = 100% - file = "panel.png" -} - # %TITLE% is filled in by ./build from /etc/os-release. + label { left = 3% @@ -75,3 +66,14 @@ terminal-border: "0" bg_color = "@SURFACE@" border_color = "@SURFACE@" } + +# The panel: bg_alt at ~85% alpha, stretched over the left quarter. Last on +# purpose: GRUB paints components in reverse order, so the last one declared +# is the bottom layer. Declared first, it covers the menu and dims it. ++ image { + left = 0 + top = 0 + width = 25% + height = 100% + file = "panel.png" +} |