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channels: Make 'validate-pull' call right after clone/pull.
This should come before patching, authentication, etc.
* guix/channels.scm (latest-channel-instance): Add #:validate-pull
parameter and honor it. Return a single value: the instance.
(ensure-forward-channel-update): Change 'instance' parameter to 'commit'
and adjust accordingly.
(latest-channel-instances): Adjust to 'latest-channel-instance' changes.
* guix/scripts/pull.scm (warn-about-backward-updates): Change 'instance'
parameter to 'commit' and adjust accordingly.
* tests/channels.scm ("latest-channel-instances #:validate-pull"):
Likewise.
This commit is contained in:
Ludovic Courtès
parent
43badf261f
commit
5bafc70d1e
3 changed files with 26 additions and 25 deletions
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@ -375,9 +375,12 @@ (define reporter
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(define* (latest-channel-instance store channel
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#:key (patches %patches)
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starting-commit)
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"Return two values: the latest channel instance for CHANNEL, and its
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relation to STARTING-COMMIT when provided."
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starting-commit
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(validate-pull
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ensure-forward-channel-update))
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"Return the latest channel instance for CHANNEL. When STARTING-COMMIT is
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true, call VALIDATE-PULL with CHANNEL, STARTING-COMMIT, the target commit, and
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their relation."
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(define (dot-git? file stat)
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(and (string=? (basename file) ".git")
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(eq? 'directory (stat:type stat))))
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@ -386,6 +389,9 @@ (define (dot-git? file stat)
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(update-cached-checkout (channel-url channel)
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#:ref (channel-reference channel)
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#:starting-commit starting-commit)))
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(when relation
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(validate-pull channel starting-commit commit relation))
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(if (channel-introduction channel)
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(authenticate-channel channel checkout commit)
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;; TODO: Warn for all the channels once the authentication interface
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@ -403,12 +409,11 @@ (define (dot-git? file stat)
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(let* ((name (url+commit->name (channel-url channel) commit))
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(checkout (add-to-store store name #t "sha256" checkout
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#:select? (negate dot-git?))))
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(values (channel-instance channel commit checkout)
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relation))))
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(channel-instance channel commit checkout))))
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(define (ensure-forward-channel-update channel start instance relation)
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(define (ensure-forward-channel-update channel start commit relation)
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"Raise an error if RELATION is not 'ancestor, meaning that START is not an
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ancestor of the commit in INSTANCE, unless CHANNEL specifies a commit.
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ancestor of COMMIT, unless CHANNEL specifies a commit.
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This procedure implements a channel update policy meant to be used as a
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#:validate-pull argument."
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@ -422,8 +427,7 @@ (define (ensure-forward-channel-update channel start instance relation)
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(format #f (G_ "\
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aborting update of channel '~a' to commit ~a, which is not a descendant of ~a")
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(channel-name channel)
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(channel-instance-commit instance)
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start))))
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commit start))))
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;; If the user asked for a specific commit, they might want
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;; that to happen nevertheless, so tell them about the
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@ -482,14 +486,13 @@ (define-values (resulting-channels instances)
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(G_ "Updating channel '~a' from Git repository at '~a'...~%")
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(channel-name channel)
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(channel-url channel))
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(let*-values (((current)
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(current-commit (channel-name channel)))
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((instance relation)
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(let* ((current (current-commit (channel-name channel)))
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(instance
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(latest-channel-instance store channel
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#:validate-pull
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validate-pull
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#:starting-commit
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current)))
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(when relation
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(validate-pull channel current instance relation))
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(let-values (((new-instances new-channels)
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(loop (channel-instance-dependencies instance)
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@ -195,20 +195,18 @@ (define %options
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%standard-build-options))
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(define (warn-about-backward-updates channel start instance relation)
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"Warn about non-forward updates of CHANNEL from START to INSTANCE, without
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(define (warn-about-backward-updates channel start commit relation)
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"Warn about non-forward updates of CHANNEL from START to COMMIT, without
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aborting."
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(match relation
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((or 'ancestor 'self)
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#t)
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('descendant
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(warning (G_ "rolling back channel '~a' from ~a to ~a~%")
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(channel-name channel) start
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(channel-instance-commit instance)))
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(channel-name channel) start commit))
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('unrelated
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(warning (G_ "moving channel '~a' from ~a to unrelated commit ~a~%")
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(channel-name channel) start
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(channel-instance-commit instance)))))
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(channel-name channel) start commit))))
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(define* (display-profile-news profile #:key concise?
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current-is-newer?)
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@ -212,12 +212,12 @@ (define channel-metadata-dependencies
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(commit (oid->string (commit-id commit2)))))
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(old (channel (inherit spec)
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(commit (oid->string (commit-id commit1))))))
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(define (validate-pull channel current instance relation)
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(define (validate-pull channel current commit relation)
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(return (and (eq? channel old)
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(string=? (oid->string (commit-id commit2))
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current)
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(string=? (oid->string (commit-id commit1))
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(channel-instance-commit instance))
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commit)
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relation)))
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(with-store store
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