[PATCH 0/2] Allow '.guix-channel' to advertise the primary URL

DoneSubmitted by Ludovic Courtès.
One participant
  • Ludovic Courtès
Ludovic Courtès wrote on 15 Jun 2020 17:12
(address . guix-patches@gnu.org)(name . Ludovic Courtès)(address . ludo@gnu.org)
As discussed in https://issues.guix.gnu.org/issue/22883#69, thispatch provides a way for channel authors to state what the primaryURL of their channel is. The goal here is simply to warn userswhen they are pulling from a mirror so that they cannot be trickedinto pulling from a stale mirror.
This goes on top of https://issues.guix.gnu.org/41767.
Ludovic Courtès (2): channels: Warn when pulling from a mirror. .guix-channel: Add primary URL.
.guix-channel | 3 ++- doc/guix.texi | 22 ++++++++++++++++++++++ guix/channels.scm | 29 +++++++++++++++++++++++++---- 3 files changed, 49 insertions(+), 5 deletions(-)
-- 2.26.2
Ludovic Courtès wrote on 15 Jun 2020 17:20
[PATCH 1/2] channels: Warn when pulling from a mirror.
(address . 41870@debbugs.gnu.org)(name . Ludovic Courtès)(address . ludo@gnu.org)
* guix/channels.scm (<channel-metadata>)[url]: New field.(read-channel-metadata): Initialize it.(read-channel-metadata-from-source): Likewise.(channel-instance-primary-url): New procedure.(latest-channel-instances): Compare CHANNEL's URL against it.* doc/guix.texi (Channels)[Primary URL]: New subsection.--- doc/guix.texi | 22 ++++++++++++++++++++++ guix/channels.scm | 29 +++++++++++++++++++++++++---- 2 files changed, 47 insertions(+), 4 deletions(-)
Toggle diff (114 lines)diff --git a/doc/guix.texi b/doc/guix.texiindex 81a11c6756..16ef5bf42e 100644--- a/doc/guix.texi+++ b/doc/guix.texi@@ -4153,6 +4153,28 @@ add a meta-data file @file{.guix-channel} that contains: (directory "guix")) @end lisp +@cindex primary URL, channels+@subsection Primary URL++Channel authors can indicate the primary URL of their channel's Git+repository in the @file{.guix-channel} file, like so:++@lisp+(channel+ (version 0)+ (url "https://example.org/guix.git"))+@end lisp++This allows @command{guix pull} to determine whether it is pulling code+from a mirror of the channel; when that is the case, it warns the user+that the mirror might be stale and displays the primary URL. That way,+users cannot be tricked into fetching code from a stale mirror that does+not receive security updates.++This feature only makes sense for authenticated repositories, such as+the official @code{guix} channel, for which @command{guix pull} ensures+the code it fetches is authentic.+ @cindex news, for channels @subsection Writing Channel News diff --git a/guix/channels.scm b/guix/channels.scmindex 38ec68fec1..7e4d6e4c84 100644--- a/guix/channels.scm+++ b/guix/channels.scm@@ -182,12 +182,13 @@ introduction, add it." (checkout channel-instance-checkout)) (define-record-type <channel-metadata>- (channel-metadata directory dependencies news-file keyring-reference)+ (channel-metadata directory dependencies news-file keyring-reference url) channel-metadata? (directory channel-metadata-directory) ;string with leading slash (dependencies channel-metadata-dependencies) ;list of <channel> (news-file channel-metadata-news-file) ;string | #f- (keyring-reference channel-metadata-keyring-reference)) ;string+ (keyring-reference channel-metadata-keyring-reference) ;string+ (url channel-metadata-url)) ;string | #f (define %default-keyring-reference ;; Default value of the 'keyring-reference' field.@@ -209,6 +210,7 @@ if valid metadata could not be read from PORT." (let ((directory (and=> (assoc-ref properties 'directory) first)) (dependencies (or (assoc-ref properties 'dependencies) '())) (news-file (and=> (assoc-ref properties 'news-file) first))+ (url (and=> (assoc-ref properties 'url) first)) (keyring-reference (or (and=> (assoc-ref properties 'keyring-reference) first) %default-keyring-reference)))@@ -229,7 +231,8 @@ if valid metadata could not be read from PORT." (commit (get 'commit)))))) dependencies) news-file- keyring-reference)))+ keyring-reference+ url))) ((and ('channel ('version version) _ ...) sexp) (raise (condition (&message (message "unsupported '.guix-channel' version"))@@ -253,7 +256,7 @@ doesn't exist." read-channel-metadata)) (lambda args (if (= ENOENT (system-error-errno args))- (channel-metadata "/" '() #f %default-keyring-reference)+ (channel-metadata "/" '() #f %default-keyring-reference #f) (apply throw args))))) (define (channel-instance-metadata instance)@@ -463,6 +466,11 @@ been tampered with and is trying to force a roll-back, preventing you from getting the latest updates. If you think this is not the case, explicitly allow non-forward updates.")))))))))) +(define (channel-instance-primary-url instance)+ "Return the primary URL advertised for INSTANCE, or #f if there is no such+information."+ (channel-metadata-url (channel-instance-metadata instance)))+ (define* (latest-channel-instances store channels #:key (current-channels '())@@ -518,6 +526,19 @@ depending on the policy it implements." validate-pull #:starting-commit current)))+ (when authenticate?+ ;; CHANNEL is authenticated so we can trust the+ ;; primary URL advertised in its metadata and warn+ ;; about possibly stale mirrors.+ (let ((primary-url (channel-instance-primary-url+ instance)))+ (unless (or (not primary-url)+ (channel-commit channel)+ (string=? primary-url (channel-url channel)))+ (warning (G_ "pulled channel '~a' from a mirror \+of ~a, which might be stale~%")+ (channel-name channel)+ primary-url)))) (let-values (((new-instances new-channels) (loop (channel-instance-dependencies instance)-- 2.26.2
Ludovic Courtès wrote on 15 Jun 2020 17:20
[PATCH 2/2] .guix-channel: Add primary URL.
(address . 41870@debbugs.gnu.org)(name . Ludovic Courtès)(address . ludo@gnu.org)
* .guix-channel: Add 'url'.--- .guix-channel | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
Toggle diff (13 lines)diff --git a/.guix-channel b/.guix-channelindex f4459f1de1..b852180cf2 100644--- a/.guix-channel+++ b/.guix-channel@@ -3,4 +3,5 @@ (channel (version 0) (news-file "etc/news.scm")- (keyring-reference "keyring"))+ (keyring-reference "keyring")+ (url "https://git.savannah.gnu.org/git/guix.git")) ;the primary URL-- 2.26.2
Ludovic Courtès wrote on 17 Jun 2020 19:33
Re: [bug#41870] [PATCH 0/2] Allow '.guix-channel' to advertise the primary URL
(address . 41870-done@debbugs.gnu.org)
Ludovic Courtès <ludo@gnu.org> skribis:
Toggle quote (3 lines)> channels: Warn when pulling from a mirror.> .guix-channel: Add primary URL.
Pushed as 8b1f7c03d239ca703b56f2a6e5f228c79bc1857e.
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