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nixos/xserver: Allow more than one keyboard layout
Regression introduced by 44c64fef16
.
The services.xserver.layout option allows to specify more than one
layout separated by comma, which the commit above didn't take into
account.
This is very similar to @lheckemann's pull request (#26984) but differs
in the following ways:
* Print out the full list available layouts (as suggested by @0xABAB
in [1]).
* Loop over $layout using the default IFS (and thus no need for
escaping ${cfg.layout}), because the layouts won't contain white
spaces.
* Re-do the error message, which now uses multiple echos instead of a
heredoc, so the line is wrapped according to the viewers terminal
width.
I've tested this with several good and bad layouts and also against the
keymap NixOS VM subtests.
[1]: https://github.com/NixOS/nixpkgs/pull/26984#discussion_r125146700
Signed-off-by: aszlig <aszlig@redmoonstudios.org>
Fixes: #26961
Closes: #26984
This commit is contained in:
parent
d97cdfc591
commit
69da1807f0
@ -651,29 +651,49 @@ in
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system.extraDependencies = singleton (pkgs.runCommand "xkb-layouts-exist" {
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inherit (cfg) layout xkbDir;
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} ''
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if sed -n -e ':i /^! \(layout\|variant\) *$/ {
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# We can use the default IFS here, because the layouts won't contain
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# spaces or tabs and are ruled out by the sed expression below.
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availableLayouts="$(
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sed -n -e ':i /^! \(layout\|variant\) *$/ {
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# Loop through all of the layouts/variants until we hit another ! at
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# the start of the line or the line is empty ('t' branches only if
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# the last substitution was successful, so if the line is empty the
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# substition will fail).
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:l; n; /^!/bi; s/^ *\([^ ]\+\).*/\1/p; tl
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}' "$xkbDir/rules/base.lst" | grep -qxF "$layout"
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then
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touch "$out"
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exit 0
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fi
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}' "$xkbDir/rules/base.lst" | sort -u
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)"
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cat >&2 <<-EOF
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layoutNotFound() {
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echo >&2
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echo "The following layouts and variants are available:" >&2
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echo >&2
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The selected keyboard layout definition does not exist:
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# While an output width of 80 is more desirable for small terminals, we
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# really don't know the amount of columns of the terminal from within
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# the builder. The content in $availableLayouts however is pretty
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# large, so let's opt for a larger width here, because it will print a
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# smaller amount of lines on modern KMS/framebuffer terminals and won't
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# lose information even in smaller terminals (it only will look a bit
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# ugly).
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echo "$availableLayouts" | ${pkgs.utillinux}/bin/column -c 150 >&2
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$layout
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echo >&2
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echo "However, the keyboard layout definition in" \
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"\`services.xserver.layout' contains the layout \`$1', which" \
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"isn't a valid layout or variant." >&2
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echo >&2
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exit 1
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}
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Set \`services.xserver.layout' to the name of an existing keyboard
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layout (check $xkbDir/rules/base.lst for options).
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# Again, we don't need to take care of IFS, see the comment for
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# $availableLayouts.
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for l in ''${layout//,/ }; do
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if ! echo "$availableLayouts" | grep -qxF "$l"; then
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layoutNotFound "$l"
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fi
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done
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EOF
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exit 1
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touch "$out"
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'');
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services.xserver.config =
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