doc/rules-format.txt: document include support
Signed-off-by: Ran Benita <ran@unusedvar.com>master
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@ -40,7 +40,9 @@ Grammar
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(It might be helpful to look at a file like rules/evdev along with
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this grammer. Comments, whitespace, etc. are not shown.)
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File ::= { "!" (Group | RuleSet) }
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File ::= { "!" (Include | Group | RuleSet) }
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Include ::= "include" <ident>
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Group ::= GroupName "=" { GroupElement } "\n"
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GroupName ::= "$"<ident>
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@ -59,6 +61,18 @@ KccgstValue ::= <ident>
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Notes:
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- Include processes the rules in the file path specified in the ident,
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in order. %-expanasion is performed, as follows:
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%%:
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A literal %.
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%H:
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The value of the HOME environment variable.
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%S:
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The system-installed rules directory (usually /usr/share/X11/xkb/rules).
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- The order of values in a Rule must be the same as the Mapping it
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follows. The mapping line determines the meaning of the values in
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the rules which follow in the RuleSet.
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