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boundary="=-=-="; micalg=pgp-sha512; protocol="application/pgp-signature" Received-SPF: pass client-ip=37.205.8.62; envelope-from=~@wolfsden.cz; helo=wolfsden.cz X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: guix-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Development of GNU Guix and the GNU System distribution." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guix-devel-bounces+larch=yhetil.org@gnu.org Sender: guix-devel-bounces+larch=yhetil.org@gnu.org X-Migadu-Country: US X-Migadu-Flow: FLOW_IN X-Migadu-Spam-Score: -7.25 X-Spam-Score: -7.25 X-Migadu-Queue-Id: D05F78C8BB X-Migadu-Scanner: mx12.migadu.com X-TUID: iTUGoXXWcYBR --=-=-= Content-Type: text/plain Content-Transfer-Encoding: quoted-printable Suhail Singh writes: > Tomas Volf <~@wolfsden.cz> writes: > >> I would like to point out that there is more work involved than just >> splitting it into separate channels and adding those into >> %default-channels. > > Could you please elaborate? Or were these the two points you noted > below? Yes, I have meant that the various issues would need to be fixed or figured out. > >> While multiple channels do work well with guix pull, there are annoying >> limitations when used in other places. > > Could you please share some references for this? Definitely. I personally have run into these two issues: #74396 When you install system-wide guix with multiple channels, it shadows channels from your guix-pulled guix (except for 'guix channel). That was unpleasant surprise. guix-for-channels does not cache `guix-for-channels' procedure is a way how to produce a guix package for a channel list. However it does not cache the computation, so it is extremely slow when actually used. I wrote a bit about that here: https://wolfsden.cz/blog/post/what-goes-into-guix-shaped-hole.html . I am not sure if there are more, but my impression is that using multiple channels (outside of guix-pull) is not well explored territory, so I would not be surprised. > >> Also you would need some way to specify what channel commits are able to >> work together version-wise. > > Let's say we have two channels in the future: $guix-slim and > $guix-extras. Wouldn't it be sufficient for $guix-extras to depend on > $guix-slim ? If not, could you please elaborate? You say depend on guix-slim, but on *what* commit from guix-slim? You can pin channels. What happens when you pin guix-slim, but pull guix-extras? I believe some human readable error should be given, not a failure to build something due to, for example, not having the required version of gcc now (for example because guix-extras increased the required version). Also what about substitutes? Which combinations of commits will have substitutes built? I just feel there is a lot to figure out with this proposal. Have a nice day, Tomas =2D-=20 There are only two hard things in Computer Science: cache invalidation, naming things and off-by-one errors. --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQJCBAEBCgAsFiEEt4NJs4wUfTYpiGikL7/ufbZ/wakFAmddeXsOHH5Ad29sZnNk ZW4uY3oACgkQL7/ufbZ/wakGyA/9FAP9pAOAQT0uU/PjG4ywp/xQJsgxpD+R8LmV mUBbOtlS22iszcK4b8/Ni4w/WUMRfZtpJtWmDOGefdiLglqcdFLFbyObLYku+dor yOBsfUYlqifx6ATvymifrnfBDjJJKuIy//W6EqYm/IS4ipg49eZdPFn+XvgBI3rQ US/AGZg+jBiIkqkIObzVfa4+pGJuZgDppzngTZX7rls8hAM12fqSqLM6WsUNopqv xx5Y8zTIsc0yYgCqUFYyjJ4l3l1df15G7X+h1rF17V7g8ZQhpQeuDlyQfZR47h4j h/l2hywHadAPE+yN0bla+lA3xdHZYibOvqSyu0aS7cy0LZRX+DM3OjquubHxuI7g x7gElpbqX1SmsYHzp1Wfg+p5t2Av4PRGJ3rVUpCiWKuMk4pfehdvos31a7ElALib CgVazyN85TJExLdcESyFKTInDG2nNZsT8nwtKb7yU5nRD5H9+YZOWzoFebu3YUyW 4ODJTkyIJWcDSVU59NFsH6hFTomcYE66cm6tr+jiNn9lx/UEbFec1OMzaQTfKtR6 EU+i5jBdh4c7ff0U3Z4vrUToLvZlLYZ8m0w02FlzHEQqPdfC189g1WQsSIvYtl4v qLe6jCGtTeznW5DRdaHlLyQAjTRZMStvngSWXRIqOQRlJe71TUZeNqlHfpGsbKpO x1aDn6w= =soQL -----END PGP SIGNATURE----- --=-=-=--