mirror of git://git.savannah.gnu.org/guix.git
store-copy: 'read-reference-graph' returns a list of records.
The previous implementation of 'read-reference-graph' was good enough
for many use cases, but it discarded the graph structure, which is
useful information in some cases.
* guix/build/store-copy.scm (<store-info>): New record type.
(read-reference-graph): Rewrite to return a list of <store-info>.
(closure-size, populate-store): Adjust accordingly.
* gnu/services/base.scm (references-file): Adjust accordingly.
* gnu/system/vm.scm (system-docker-image): Likewise.
* guix/scripts/pack.scm (squashfs-image, docker-image): Likewise.
* tests/gexp.scm ("gexp->derivation #:references-graphs"): Likewise.
This commit is contained in:
Ludovic Courtès
parent
f8f9f7cabc
commit
6892f0a247
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@ -1592,8 +1592,9 @@ failed to register hydra.gnu.org public key: ~a~%" status))))))))
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(call-with-output-file #$output
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(lambda (port)
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(write (call-with-input-file "graph"
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read-reference-graph)
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(write (map store-info-item
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(call-with-input-file "graph"
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read-reference-graph))
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port)))))
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#:options `(#:local-build? #f
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#:references-graphs (("graph" ,item))))
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@ -466,8 +466,10 @@ should set REGISTER-CLOSURES? to #f."
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(build-docker-image
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(string-append "/xchg/" #$name) ;; The output file.
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(cons* root-directory
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(call-with-input-file (string-append "/xchg/" #$graph)
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read-reference-graph))
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(map store-info-item
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(call-with-input-file
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(string-append "/xchg/" #$graph)
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read-reference-graph)))
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#$os-drv
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#:compressor '(#+(file-append gzip "/bin/gzip") "-9n")
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#:creation-time (make-time time-utc 0 1)
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@ -1,5 +1,5 @@
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;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2013, 2014, 2017 Ludovic Courtès <ludo@gnu.org>
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;;; Copyright © 2013, 2014, 2017, 2018 Ludovic Courtès <ludo@gnu.org>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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@ -18,10 +18,21 @@
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(define-module (guix build store-copy)
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#:use-module (guix build utils)
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#:use-module (guix sets)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-9)
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#:use-module (srfi srfi-26)
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#:use-module (ice-9 match)
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#:use-module (ice-9 rdelim)
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#:use-module (ice-9 ftw)
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#:export (read-reference-graph
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#:use-module (ice-9 vlist)
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#:export (store-info?
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store-info-item
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store-info-deriver
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store-info-references
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read-reference-graph
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closure-size
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populate-store))
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@ -34,19 +45,94 @@
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;;;
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;;; Code:
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;; Information about a store item as produced by #:references-graphs.
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(define-record-type <store-info>
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(store-info item deriver references)
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store-info?
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(item store-info-item) ;string
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(deriver store-info-deriver) ;#f | string
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(references store-info-references)) ;?
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;; TODO: Factorize with that in (guix store).
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(define (topological-sort nodes edges)
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"Return NODES in topological order according to EDGES. EDGES must be a
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one-argument procedure that takes a node and returns the nodes it is connected
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to."
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(define (traverse)
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;; Do a simple depth-first traversal of all of PATHS.
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(let loop ((nodes nodes)
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(visited (setq))
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(result '()))
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(match nodes
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((head tail ...)
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(if (set-contains? visited head)
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(loop tail visited result)
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(call-with-values
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(lambda ()
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(loop (edges head)
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(set-insert head visited)
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result))
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(lambda (visited result)
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(loop tail visited (cons head result))))))
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(()
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(values visited result)))))
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(call-with-values traverse
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(lambda (_ result)
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(reverse result))))
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(define (read-reference-graph port)
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"Return a list of store paths from the reference graph at PORT.
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The data at PORT is the format produced by #:references-graphs."
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(let loop ((line (read-line port))
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(result '()))
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(cond ((eof-object? line)
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(delete-duplicates result))
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((string-prefix? "/" line)
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(loop (read-line port)
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(cons line result)))
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(else
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(loop (read-line port)
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result)))))
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"Read the reference graph as produced by #:references-graphs from PORT and
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return it as a list of <store-info> records in topological order--i.e., leaves
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come first. IOW, store items in the resulting list can be registered in the
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order in which they appear.
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The reference graph format consists of sequences of lines like this:
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FILE
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DERIVER
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NUMBER-OF-REFERENCES
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REF1
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...
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REFN
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It is meant as an internal format."
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(let loop ((result '())
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(table vlist-null)
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(referrers vlist-null))
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(match (read-line port)
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((? eof-object?)
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;; 'guix-daemon' gives us something that's in "reverse topological
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;; order"--i.e., leaves (items with zero references) come last. Here
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;; we compute the topological order that we want: leaves come first.
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(let ((unreferenced? (lambda (item)
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(let ((referrers (vhash-fold* cons '()
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(store-info-item item)
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referrers)))
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(or (null? referrers)
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(equal? (list item) referrers))))))
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(topological-sort (filter unreferenced? result)
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(lambda (item)
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(map (lambda (item)
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(match (vhash-assoc item table)
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((_ . node) node)))
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(store-info-references item))))))
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(item
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(let* ((deriver (match (read-line port)
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("" #f)
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(line line)))
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(count (string->number (read-line port)))
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(refs (unfold-right (cut >= <> count)
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(lambda (n)
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(read-line port))
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1+
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0))
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(item (store-info item deriver refs)))
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(loop (cons item result)
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(vhash-cons (store-info-item item) item table)
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(fold (cut vhash-cons <> item <>)
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referrers
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refs)))))))
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(define (file-size file)
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"Return the size of bytes of FILE, entering it if FILE is a directory."
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@ -72,7 +158,8 @@ The data at PORT is the format produced by #:references-graphs."
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"Return an estimate of the size of the closure described by
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REFERENCE-GRAPHS, a list of reference-graph files."
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(define (graph-from-file file)
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(call-with-input-file file read-reference-graph))
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(map store-info-item
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(call-with-input-file file read-reference-graph)))
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(define items
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(delete-duplicates (append-map graph-from-file reference-graphs)))
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@ -88,7 +175,8 @@ REFERENCE-GRAPHS, a list of reference-graph files."
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(define (things-to-copy)
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;; Return the list of store files to copy to the image.
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(define (graph-from-file file)
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(call-with-input-file file read-reference-graph))
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(map store-info-item
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(call-with-input-file file read-reference-graph)))
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(delete-duplicates (append-map graph-from-file reference-graphs)))
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@ -251,8 +251,9 @@ added to the pack."
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;; ancestor directories and only keeps the basename. We fix this
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;; in the following invocations of mksquashfs.
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(apply invoke "mksquashfs"
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`(,@(call-with-input-file "profile"
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read-reference-graph)
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`(,@(map store-info-item
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(call-with-input-file "profile"
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read-reference-graph))
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,#$output
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;; Do not perform duplicate checking because we
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@ -352,8 +353,9 @@ the image."
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(setenv "PATH" (string-append #$archiver "/bin"))
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(build-docker-image #$output
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(call-with-input-file "profile"
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read-reference-graph)
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(map store-info-item
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(call-with-input-file "profile"
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read-reference-graph))
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#$profile
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#:system (or #$target (utsname:machine (uname)))
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#:symlinks '#$symlinks
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@ -615,6 +615,7 @@
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`(("graph" ,two))
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#:modules
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'((guix build store-copy)
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(guix sets)
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(guix build utils))))
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(ok? (built-derivations (list drv)))
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(out -> (derivation->output-path drv)))
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@ -815,21 +816,25 @@
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(two (gexp->derivation "two"
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#~(symlink #$one #$output:chbouib)))
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(build -> (with-imported-modules '((guix build store-copy)
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(guix sets)
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(guix build utils))
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#~(begin
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(use-modules (guix build store-copy))
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(with-output-to-file #$output
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(lambda ()
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(write (call-with-input-file "guile"
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read-reference-graph))))
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(write (map store-info-item
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(call-with-input-file "guile"
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read-reference-graph)))))
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(with-output-to-file #$output:one
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(lambda ()
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(write (call-with-input-file "one"
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read-reference-graph))))
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(write (map store-info-item
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(call-with-input-file "one"
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read-reference-graph)))))
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(with-output-to-file #$output:two
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(lambda ()
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(write (call-with-input-file "two"
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read-reference-graph)))))))
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(write (map store-info-item
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(call-with-input-file "two"
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read-reference-graph))))))))
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(drv (gexp->derivation "ref-graphs" build
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#:references-graphs `(("one" ,one)
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("two" ,two "chbouib")
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