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services: cups: Add BrowseDNSSDSubTypes directive.

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* gnu/services/cups.scm (comma-separated-string-list?)
(serialize-comma-separated-string-list): New variables.
(cups-configuration)[browse-dns-sd-sub-types]: New field.
* doc/guix.texi (Printing Services): Document it.
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Tobias Geerinckx-Rice 2019-08-29 23:02:10 +02:00
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commit ee0de99454
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8
doc/guix.texi
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@ -14248,6 +14248,14 @@ longer required for quotas.
Defaults to @samp{#f}.
@end deftypevr
@deftypevr {@code{cups-configuration} parameter} comma-separated-string-list browse-dns-sd-sub-types
Specifies a list of DNS-SD sub-types to advertise for each shared printer.
For example, @samp{"_cups" "_print"} will tell network clients that both
CUPS sharing and IPP Everywhere are supported.
Defaults to @samp{"_cups"}.
@end deftypevr
@deftypevr {@code{cups-configuration} parameter} browse-local-protocols browse-local-protocols
Specifies which protocols to use for local printer sharing.

13
gnu/services/cups.scm
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@ -83,6 +83,14 @@ (define (multiline-string-list? val)
(define (serialize-multiline-string-list field-name val)
(for-each (lambda (str) (serialize-field field-name str)) val))
(define (comma-separated-string-list? val)
(and (list? val)
(and-map (lambda (x)
(and (string? x) (not (string-index x #\,))))
val)))
(define (serialize-comma-separated-string-list field-name val)
(serialize-field field-name (string-join val ",")))
(define (space-separated-string-list? val)
(and (list? val)
(and-map (lambda (x)
@ -489,6 +497,11 @@ (define-configuration cups-configuration
(boolean #f)
"Specifies whether to purge job history data automatically when it is no
longer required for quotas.")
(browse-dns-sd-sub-types
(comma-separated-string-list (list "_cups"))
"Specifies a list of DNS-SD sub-types to advertise for each shared printer.
For example, @samp{\"_cups\" \"_print\"} will tell network clients that both
CUPS sharing and IPP Everywhere are supported.")
(browse-local-protocols
(browse-local-protocols 'dnssd)
"Specifies which protocols to use for local printer sharing.")