mirror of
https://github.com/bryanthaboi/gen1recomp.git
synced 2026-08-12 16:31:05 +02:00
Gabriel Florio
52 lines
2.0 KiB
Lua
52 lines
2.0 KiB
Lua
-- Helpers for calling host tools (curl, zenity/kdialog, ...).
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local HostShell = {}
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-- Our AppRun exports LD_LIBRARY_PATH="$APPDIR/lib:..." so every subprocess we
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-- spawn tries to link against the libraries we're shipping instead of the
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-- system ones. We want to unset the var so that any system tools can find
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-- their proper libraries. Only needed when running in an AppImage.
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function HostShell.envPrefix()
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if os.getenv("APPIMAGE") then
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return "env -u LD_LIBRARY_PATH "
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end
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return ""
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end
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-- Wraps io.popen with the AppImage env fix applied and lua errors swallowed
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function HostShell.popen(command, mode)
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local ok, pipe = pcall(io.popen, HostShell.envPrefix() .. command, mode or "r")
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if not ok or not pipe then return nil end
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return pipe
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end
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-- Restart the whole app. The obvious love.event.quit("restart") re-runs LÖVE's
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-- boot in-process, which calls love.filesystem.init a second time -- and inside
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-- an AppImage physfs is already initialized, so that second init throws
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-- ("Failed to initialize filesystem: already initialized") and the relaunch
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-- crashes. So on an AppImage we relaunch the executable; the fresh process's
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-- Boot step mounts any downloaded update exactly as a manual relaunch would.
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-- On every other platform the in-process restart works, so keep it.
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function HostShell.restart()
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if not (love and love.event and love.event.quit) then return end
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local appimage = os.getenv("APPIMAGE")
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if not appimage then
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love.event.quit("restart")
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return
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end
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-- We have to restart the process with this cursed execv call to prevent the
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-- PID from changing, which might cause SteamOS and other Linux launchers to
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-- think the app has crashed.
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local ffi = require("ffi")
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pcall(ffi.cdef, [[
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int execv(const char *path, char *const argv[]);
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int unsetenv(const char *name);
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]])
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ffi.C.unsetenv("LD_LIBRARY_PATH")
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local argv = ffi.new("const char *[2]", appimage, nil)
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ffi.C.execv(appimage, ffi.cast("char *const *", argv))
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end
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return HostShell
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