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store: 'with-store' expands to a single procedure call.

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* guix/store.scm (call-with-store): New procedure.
(with-store): Write in terms of 'call-with-store'.
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Ludovic Courtès 2019-04-09 09:52:48 +02:00
parent 5c32857f91
commit 95207e70d5
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1 changed files with 8 additions and 4 deletions
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guix/store.scm
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@ -602,19 +602,23 @@ connection. Use with care."
"Close the connection to SERVER."
(close (store-connection-socket server)))
(define-syntax-rule (with-store store exp ...)
"Bind STORE to an open connection to the store and evaluate EXPs;
automatically close the store when the dynamic extent of EXP is left."
(define (call-with-store proc)
"Call PROC with an open store connection."
(let ((store (open-connection)))
(dynamic-wind
(const #f)
(lambda ()
(parameterize ((current-store-protocol-version
(store-connection-version store)))
exp) ...)
(proc store)))
(lambda ()
(false-if-exception (close-connection store))))))
(define-syntax-rule (with-store store exp ...)
"Bind STORE to an open connection to the store and evaluate EXPs;
automatically close the store when the dynamic extent of EXP is left."
(call-with-store (lambda (store) exp ...)))
(define current-store-protocol-version
;; Protocol version of the store currently used. XXX: This is a hack to
;; communicate the protocol version to the build output port. It's a hack