mirror of
https://git.srhtnin.garden/sarah/SaraSuite.git
synced 2026-10-14 18:28:11 +02:00
119 lines
5.1 KiB
Python
119 lines
5.1 KiB
Python
"""Give a Flet program's window its own app ID on Linux, so the desktop can
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match it to the program's .desktop entry (icon, name) instead of showing
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every Flet program as "com.appveyor.flet" with a generic icon.
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The Flet client's ID is a string built into its small launcher binary
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(`flet`, ~24 KB); the client sets it as both its GTK application ID and its
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process name, so Flet's own FLET_APP_ID (which only changes argv[0]) can't
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override it, on Wayland or X11. Instead this makes a per-program copy of the
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client in ~/.cache/SaraSuite/FletClient/ with that string replaced; the big
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parts (lib/, data/, share/) are symlinks to the original, so a copy costs
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~24 KB. Pointing FLET_VIEW_PATH at it makes Flet use the copy.
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Used two ways:
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- SaraSuite imports it and calls ClientFor() before ft.run.
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- Installed programs' launchers run it with their own venv's python:
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export FLET_VIEW_PATH="$(python FletIdentity.py srhtnin.SaraFem)"
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It prints the copy's folder, or nothing if anything goes wrong, in which
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case Flet just uses its normal client.
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"""
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import os
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import shutil
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import sys
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from pathlib import Path
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OriginalId = b"com.appveyor.flet"
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# Flet's window needs libsecret, which isn't part of GTK and some systems don't
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# install. SaraSuite keeps copies of it and what it needs (from its AppImage)
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# here; AddMissingLibraries puts the ones this system lacks in a fallback-libs
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# folder beside the client copy, which the program's Launch.sh adds to
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# LD_LIBRARY_PATH (a plugin loads libsecret, so the client's own lib folder,
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# its RUNPATH, wouldn't be searched for it).
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LibrariesDir = Path(os.environ.get("XDG_DATA_HOME") or Path.home() / ".local" / "share") / "SaraSuite" / "Libraries"
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FallbackLibraries = ("libgpg-error.so.0", "libgcrypt.so.20", "libsecret-1.so.0")
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CopiesDir = Path.home() / ".cache" / "SaraSuite" / "FletClient"
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def _SystemHas(Name: str) -> bool:
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"""Whether the system has a library (its standard folders and linker
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cache; the same check as the AppImages' RestoreLibraryPath.py)."""
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import subprocess
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for Folder in ("/usr/lib64", "/usr/lib", "/lib64", "/lib", "/usr/lib/x86_64-linux-gnu", "/lib/x86_64-linux-gnu"):
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if (Path(Folder) / Name).exists():
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return True
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try:
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Cache = subprocess.run(["ldconfig", "-p"], capture_output=True, text=True, timeout=10,
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env={"PATH": "/usr/sbin:/usr/bin:/sbin:/bin"}).stdout
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except (OSError, subprocess.SubprocessError):
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return False
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return any(Line.strip().startswith(Name + " ") for Line in Cache.splitlines())
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def AddMissingLibraries(Folder: Path) -> None:
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"""Copies SaraSuite's fallback libraries the system doesn't have into
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Folder (created only if one is needed)."""
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if not sys.platform.startswith("linux") or not LibrariesDir.is_dir():
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return
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for Name in FallbackLibraries:
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Source = LibrariesDir / Name
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if Source.is_file() and not (Folder / Name).exists() and not _SystemHas(Name):
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Folder.mkdir(parents=True, exist_ok=True)
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shutil.copy2(Source, Folder / Name)
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def ClientFor(AppId: str) -> str:
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"""Folder of a client copy whose app ID is AppId ("" if not possible).
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AppId needs a dot (a GTK rule) and at most 17 characters, the length of
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the original it replaces in place."""
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try:
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Encoded = AppId.encode("ascii")
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if "." not in AppId or not 0 < len(Encoded) <= len(OriginalId):
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return ""
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from flet_desktop import ensure_client_cached # the program's own Flet version
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Original = Path(ensure_client_cached()) / "flet"
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Binary = (Original / "flet").read_bytes()
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Copy = CopiesDir / f"{Original.parent.name}-{AppId}" / "flet"
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Patched = Binary.replace(
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b"\x00" + OriginalId + b"\x00",
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b"\x00" + Encoded.ljust(len(OriginalId), b"\x00") + b"\x00",
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)
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if Binary.count(b"\x00" + OriginalId + b"\x00") != 1:
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return "" # not the client layout this was written for
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AddMissingLibraries(Copy.parent / "fallback-libs")
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Target = Copy / "flet"
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if not (Target.exists() and Target.read_bytes() == Patched):
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Copy.mkdir(parents=True, exist_ok=True)
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for Part in ("lib", "data", "share"):
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Link = Copy / Part
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if Link.is_symlink() or Link.exists():
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Link.unlink()
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if (Original / Part).exists():
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Link.symlink_to(Original / Part)
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Temporary = Target.with_suffix(".new")
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Temporary.write_bytes(Patched)
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Temporary.chmod(0o755)
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Temporary.replace(Target)
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return str(Copy)
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except Exception:
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return ""
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if __name__ == "__main__":
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# Only the folder goes to stdout, which the launcher reads: Flet's own
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# messages ("Preparing Flet ... for the first use", written straight to
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# the file descriptor) go to stderr.
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sys.stdout.flush()
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Stdout = os.dup(1)
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os.dup2(2, 1)
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try:
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Folder = ClientFor(sys.argv[1]) if len(sys.argv) > 1 else ""
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finally:
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sys.stdout.flush()
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os.dup2(Stdout, 1)
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os.close(Stdout)
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print(Folder)
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