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store: Wait for the server to be done sending output.

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* guix/store.scm (current-build-output-port): New variable.
  (process-stderr): Add docstring.  Always return #f, except upon
  %STDERR-LAST.  Upon %STDERR-NEXT, write to
  `current-build-output-port', not `current-error-port'.
  (set-build-options): Loop until `process-stderr' returns true.
  (define-operation): Likewise.
  (build-derivations): Update docstring to mention that it's
  synchronous.
This commit is contained in:
Ludovic Courtès 2012-06-16 16:13:12 +02:00
parent 73d9659697
commit dcee50c114
1 changed files with 23 additions and 7 deletions
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30
guix/store.scm
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@ -46,6 +46,8 @@ (define-module (guix store)
add-to-store
build-derivations
current-build-output-port
%store-prefix
store-path?
derivation-path?))
@ -274,7 +276,15 @@ (define* (open-connection #:optional (file %default-socket-path))
(process-stderr s)
s))))))))
(define current-build-output-port
;; The port where build output is sent.
(make-parameter (current-error-port)))
(define (process-stderr server)
"Read standard output and standard error from SERVER, writing it to
CURRENT-BUILD-OUTPUT-PORT. Return #t when SERVER is done sending data, and
#f otherwise; in the latter case, the caller should call `process-stderr'
again until #t is returned or an error is raised."
(define p
(nix-server-socket server))
@ -287,15 +297,16 @@ (define %stderr-error #x63787470)
(let ((k (read-int p)))
(cond ((= k %stderr-write)
(read-string p))
(read-string p)
#f)
((= k %stderr-read)
(let ((len (read-int p)))
(read-string p) ; FIXME: what to do?
))
#f))
((= k %stderr-next)
(let ((s (read-string p)))
(display s (current-error-port))
s))
(display s (current-build-output-port))
#f))
((= k %stderr-error)
(let ((error (read-string p))
(status (if (>= (nix-server-minor-version server) 8)
@ -305,6 +316,7 @@ (define %stderr-error #x63787470)
(message error)
(status status))))))
((= k %stderr-last)
;; The daemon is done (see `stopWork' in `nix-worker.cc'.)
#t)
(else
(raise (condition (&nix-protocol-error
@ -343,7 +355,8 @@ (define socket
(send use-build-hook?))
(if (>= (nix-server-minor-version server) 4)
(send build-verbosity log-type print-build-trace))
(process-stderr server)))
(let loop ((done? (process-stderr server)))
(or done? (process-stderr server)))))
(define-syntax define-operation
(syntax-rules ()
@ -354,7 +367,9 @@ (define (name server arg ...)
(write-int (operation-id name) s)
(write-arg type arg s)
...
(process-stderr server)
;; Loop until the server is done sending error output.
(let loop ((done? (process-stderr server)))
(or done? (loop (process-stderr server))))
(read-arg return s))))))
(define-operation (add-text-to-store (string name) (string text)
@ -371,7 +386,8 @@ (define-operation (add-to-store (string basename)
store-path)
(define-operation (build-derivations (string-list derivations))
"Build DERIVATIONS; return #t on success."
"Build DERIVATIONS, and return when the worker is done building them.
Return #t on success."
boolean)