Hi, Considering something from the past – well to my knowledge it is still an issue with the current implementation and such it will be a issue for the future. ;-)
For instance, the R package MASS from 2019 (Guix revision 711cec): because the CRAN project did some in-place replacements, we have a hash mismatch and all the process stops. --8<---------------cut here---------------start------------->8--- $ guix build /gnu/store/wfq2ji5x9awgyk680i1vv95hq75nx3vv-MASS_7.3-51.4.tar.gz.drv substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0% substitute: updating substitutes from 'https://bordeaux.guix.gnu.org'... 100.0% The following derivation will be built: /gnu/store/wfq2ji5x9awgyk680i1vv95hq75nx3vv-MASS_7.3-51.4.tar.gz.drv building /gnu/store/wfq2ji5x9awgyk680i1vv95hq75nx3vv-MASS_7.3-51.4.tar.gz.drv... Starting download of /gnu/store/gxbam95zqjaxdd6303j97z4djr907yzn-MASS_7.3-51.4.tar.gz >From http://cran.r-project.org/src/contrib/MASS_7.3-51.4.tar.gz... download failed "http://cran.r-project.org/src/contrib/MASS_7.3-51.4.tar.gz"; 404 "Not Found" Starting download of /gnu/store/gxbam95zqjaxdd6303j97z4djr907yzn-MASS_7.3-51.4.tar.gz >From http://cran.rstudio.com/src/contrib/MASS_7.3-51.4.tar.gz... download failed "http://cran.rstudio.com/src/contrib/MASS_7.3-51.4.tar.gz"; 404 "Not Found" Starting download of /gnu/store/gxbam95zqjaxdd6303j97z4djr907yzn-MASS_7.3-51.4.tar.gz >From http://cran.univ-lyon1.fr/src/contrib/MASS_7.3-51.4.tar.gz... following redirection to `https://pbil.univ-lyon1.fr/CRAN/src/contrib/MASS_7.3-51.4.tar.gz'... download failed "https://pbil.univ-lyon1.fr/CRAN/src/contrib/MASS_7.3-51.4.tar.gz"; 404 "Not Found" Starting download of /gnu/store/gxbam95zqjaxdd6303j97z4djr907yzn-MASS_7.3-51.4.tar.gz >From http://cran.ism.ac.jp/src/contrib/MASS_7.3-51.4.tar.gz... download failed "http://cran.ism.ac.jp/src/contrib/MASS_7.3-51.4.tar.gz"; 404 "Not Found" Starting download of /gnu/store/gxbam95zqjaxdd6303j97z4djr907yzn-MASS_7.3-51.4.tar.gz >From http://cran.stat.auckland.ac.nz/src/contrib/MASS_7.3-51.4.tar.gz... download failed "http://cran.stat.auckland.ac.nz/src/contrib/MASS_7.3-51.4.tar.gz"; 404 "Not Found" Starting download of /gnu/store/gxbam95zqjaxdd6303j97z4djr907yzn-MASS_7.3-51.4.tar.gz >From http://cran.mirror.ac.za/src/contrib/MASS_7.3-51.4.tar.gz... download failed "http://cran.mirror.ac.za/src/contrib/MASS_7.3-51.4.tar.gz"; 404 "Not Found" Starting download of /gnu/store/gxbam95zqjaxdd6303j97z4djr907yzn-MASS_7.3-51.4.tar.gz >From http://cran.csie.ntu.edu.tw/src/contrib/MASS_7.3-51.4.tar.gz... download failed "http://cran.csie.ntu.edu.tw/src/contrib/MASS_7.3-51.4.tar.gz"; 404 "Not Found" Starting download of /gnu/store/gxbam95zqjaxdd6303j97z4djr907yzn-MASS_7.3-51.4.tar.gz >From http://cran.r-project.org/src/contrib/Archive/MASS/MASS_7.3-51.4.tar.gz... downloading from http://cran.r-project.org/src/contrib/Archive/MASS/MASS_7.3-51.4.tar.gz ... MASS_7.3-51.4.tar.gz 476KiB 2.1MiB/s 00:00 ▕██████████████████▏ 100.0% sha256 hash mismatch for /gnu/store/gxbam95zqjaxdd6303j97z4djr907yzn-MASS_7.3-51.4.tar.gz: expected hash: 0x1ckf51y851g0kvbhsgdxb26vfpmbw3xdbcnh3ck7fjm13da4cr actual hash: 1swfd4jnqhsb2imznib629bywrxah7b63yqxhwhd9bhyaji70hl4 hash mismatch for store item '/gnu/store/gxbam95zqjaxdd6303j97z4djr907yzn-MASS_7.3-51.4.tar.gz' build of /gnu/store/wfq2ji5x9awgyk680i1vv95hq75nx3vv-MASS_7.3-51.4.tar.gz.drv failed View build log at '/var/log/guix/drvs/wf/q2ji5x9awgyk680i1vv95hq75nx3vv-MASS_7.3-51.4.tar.gz.drv.gz'. guix build: error: build of `/gnu/store/wfq2ji5x9awgyk680i1vv95hq75nx3vv-MASS_7.3-51.4.tar.gz.drv' failed --8<---------------cut here---------------end--------------->8--- When the source is correctly available in SWH: --8<---------------cut here---------------start------------->8--- $ guix build /gnu/store/wfq2ji5x9awgyk680i1vv95hq75nx3vv-MASS_7.3-51.4.tar.gz.drv The following derivation will be built: /gnu/store/wfq2ji5x9awgyk680i1vv95hq75nx3vv-MASS_7.3-51.4.tar.gz.drv building /gnu/store/wfq2ji5x9awgyk680i1vv95hq75nx3vv-MASS_7.3-51.4.tar.gz.drv... [...] Starting download of /gnu/store/gxbam95zqjaxdd6303j97z4djr907yzn-MASS_7.3-51.4.tar.gz >From >https://archive.softwareheritage.org/api/1/content/sha256:9911d546a8d29dc906b46cb53ef8aad76d23566f4fc3b52778a1201f8a9b2c74/raw/... downloading from https://archive.softwareheritage.org/api/1/content/sha256:9911d546a8d29dc906b46cb53ef8aad76d23566f4fc3b52778a1201f8a9b2c74/raw/ ... raw/ 476KiB 9.9MiB/s 00:00 ▕██████████████████▏ 100.0% successfully built /gnu/store/wfq2ji5x9awgyk680i1vv95hq75nx3vv-MASS_7.3-51.4.tar.gz.drv /gnu/store/gxbam95zqjaxdd6303j97z4djr907yzn-MASS_7.3-51.4.tar.gz $ guix hash /gnu/store/gxbam95zqjaxdd6303j97z4djr907yzn-MASS_7.3-51.4.tar.gz 0x1ckf51y851g0kvbhsgdxb26vfpmbw3xdbcnh3ck7fjm13da4cr --8<---------------cut here---------------end--------------->8--- Therefore, the bug is to not consider a hash mismatch as a fullstop and error out but consider it as a failure of one strategy and thus try the next strategy. Other said, hash mismatch should be raised and obviously the content must be discarded; then the hash mismatch should be considered as “not found” so let try the next strategy for downloading the content. Cheers, simon
