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core: improve desktop environment detection

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This commit is contained in:
Jeffrey C. Ollie
2025-01-06 10:17:52 -06:00
parent 4838bcbb8f
commit 6d90a181ce
1 changed files with 72 additions and 6 deletions
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78
src/os/desktop.zig
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@ -60,6 +60,9 @@ pub fn launchedFromDesktop() bool {
};
}
/// The list of desktop environments that we detect. New Linux desktop
/// environments should only be added to this list if there's a specific reason
/// to differentiate between `gnome` and `other`.
pub const DesktopEnvironment = enum {
gnome,
macos,
@ -67,21 +70,84 @@ pub const DesktopEnvironment = enum {
windows,
};
/// Detect what desktop environment we are running under. This is mainly used on
/// Linux to enable or disable GTK client-side decorations but there may be more
/// uses in the future.
/// Detect what desktop environment we are running under. This is mainly used
/// on Linux to enable or disable certain features but there may be more uses in
/// the future.
pub fn desktopEnvironment() DesktopEnvironment {
return switch (comptime builtin.os.tag) {
.macos => .macos,
.windows => .windows,
.linux => de: {
if (@inComptime()) @compileError("Checking for the desktop environment on Linux must be done at runtime.");
// use $XDG_SESSION_DESKTOP to determine what DE we are using on Linux
// Use $XDG_SESSION_DESKTOP to determine what DE we are using on Linux
// https://www.freedesktop.org/software/systemd/man/latest/pam_systemd.html#desktop=
const de = posix.getenv("XDG_SESSION_DESKTOP") orelse break :de .other;
if (std.ascii.eqlIgnoreCase("gnome", de)) break :de .gnome;
if (posix.getenv("XDG_SESSION_DESKTOP")) |sd| {
if (std.ascii.eqlIgnoreCase("gnome", sd)) break :de .gnome;
if (std.ascii.eqlIgnoreCase("gnome-xorg", sd)) break :de .gnome;
}
// If $XDG_SESSION_DESKTOP is not set, or doesn't match any known
// DE, check $XDG_CURRENT_DESKTOP. $XDG_CURRENT_DESKTOP is a
// colon-separated list of up to three desktop names, although we
// only look at the first.
// https://specifications.freedesktop.org/desktop-entry-spec/latest/recognized-keys.html
if (posix.getenv("XDG_CURRENT_DESKTOP")) |cd| {
var cd_it = std.mem.splitScalar(u8, cd, ':');
const cd_first = cd_it.first();
if (std.ascii.eqlIgnoreCase(cd_first, "gnome")) break :de .gnome;
}
break :de .other;
},
else => .other,
};
}
test "desktop environment" {
const testing = std.testing;
switch (builtin.os.tag) {
.macos => try testing.expectEqual(.macos, desktopEnvironment()),
.windows => try testing.expectEqual(.windows, desktopEnvironment()),
.linux => {
const getenv = std.posix.getenv;
const setenv = @import("env.zig").setenv;
const unsetenv = @import("env.zig").unsetenv;
const xdg_current_desktop = getenv("XDG_CURRENT_DESKTOP");
defer if (xdg_current_desktop) |v| {
_ = setenv("XDG_CURRENT_DESKTOP", v);
} else {
_ = unsetenv("XDG_CURRENT_DESKTOP");
};
_ = unsetenv("XDG_CURRENT_DESKTOP");
const xdg_session_desktop = getenv("XDG_SESSION_DESKTOP");
defer if (xdg_session_desktop) |v| {
_ = setenv("XDG_SESSION_DESKTOP", v);
} else {
_ = unsetenv("XDG_SESSION_DESKTOP");
};
_ = unsetenv("XDG_SESSION_DESKTOP");
_ = setenv("XDG_SESSION_DESKTOP", "gnome");
try testing.expectEqual(.gnome, desktopEnvironment());
_ = setenv("XDG_SESSION_DESKTOP", "gnome-xorg");
try testing.expectEqual(.gnome, desktopEnvironment());
_ = setenv("XDG_SESSION_DESKTOP", "foobar");
try testing.expectEqual(.other, desktopEnvironment());
_ = unsetenv("XDG_SESSION_DESKTOP");
try testing.expectEqual(.other, desktopEnvironment());
_ = setenv("XDG_CURRENT_DESKTOP", "GNOME");
try testing.expectEqual(.gnome, desktopEnvironment());
_ = setenv("XDG_CURRENT_DESKTOP", "FOOBAR");
try testing.expectEqual(.other, desktopEnvironment());
_ = unsetenv("XDG_CURRENT_DESKTOP");
try testing.expectEqual(.other, desktopEnvironment());
},
else => try testing.expectEqual(.other, DesktopEnvironment()),
}
}