Hi, On Wed, 20 Jan 2021 at 10:35, Wiktor Żelazny <w...@freeshell.de> wrote: > On Fri, Jan 15, 2021 at 09:19:01PM +0100, Wiktor Żelazny wrote: > >> A new idea: I just checked “CRAN Time Machine” at MRAN. The tarball >> with the 0g4mi101srjbl17ydb2hl3854m3xj0llj6861lfr30sp08nkqavl hash is >> there. > > A solution with an inferior:
Your solution could be error prone, IMHO. > in guix-packages.git/local/cran.scm (guix-packages.git is a local git repo): > > (define-public r-foreign-fixed > (package (inherit r-foreign) > (version "0.8-75-fixed") > (source > (origin > (method url-fetch) > (uri > "https://cran.microsoft.com/snapshot/2020-01-27/src/contrib/foreign_0.8-75.tar.gz";) > (sha256 > (base32 > "0g4mi101srjbl17ydb2hl3854m3xj0llj6861lfr30sp08nkqavl")))))) Cool if Microsoft support long time archive of CRAN packages. Well, it seems possible to use it as fallback. > (packages->manifest > (list (first (lookup-inferior-packages inferior "r-foreign" > "0.8-75-fixed")) > (specification->package "r"))) Here, the package “r-foreign” come from d81fb2a and so it is built using the R build system from d81fb2a. However, the package “r” come from the current Guix, i.e., the Guix when the manifest is called. Therefore, the “r-foreign” and “r” packages could be incompatible. For example, if “r-foreign” is built with R 3.x and “r” with R 3.y maybe these two R versions use a different bytecode for their VMs. > $ guix time-machine --commit=d81fb2ae9443994ae5dd1cb5837276fad63f842c > --channels=channel-specs.scm -- \ > environment -C --pure --manifest=manifest.scm Specifying --commit and --channels is redundant. Other said, the --commit is not necessary because it is already provided by your ’channel-specs.scm’. But that’s a detail. :-) This command create an inferior at commit fixed by ’channel-specs.scm’ and in this inferior, it runs ’manifest.scm’. The file ’manifest.scm’ creates another inferior at commit d81fb2a to build “r-foreign” and then build “r” in the current inferior (the one specified by ’channel-specs.scm’). By “chance”, the file ’channel-specs.scm’ and ’manifest.scm’ points to the same commit. However, the inferior in ’manifest.scm’ is not necessary. And even, from my point of view, it is a bad idea. Inferiors in ’manifest.scm’ are used when you want to put some packages from different Guix commits in the same profile. And it is not what you want here; if I understand correctly your problem. All the best, simon
