This two equivalents work: (shell (file-append dash "/bin/dash")) -- this is advanced guix variant with new file-append function, this variant does not need (use-modules (guix gexp))
(shell #~(string-append #$dash "/bin/dash")) -- this is guile function string-append and gexp, ungexp functions, this variant does not need (use-modules (guix gexp)) too. May 4, 2019 11:36 AM, "rendaw" <7e9wc56emja...@s.rendaw.me> wrote: > On 5/4/19 8:29 PM, zna...@disroot.org wrote: > >> I just want to change user shell. So i know how to do it. And you have >> cleared a bit for me what is >> formed object and what is file, and what is file-append function. >> >> May 4, 2019 11:24 AM, "rendaw" <7e9wc56emja...@s.rendaw.me> wrote: >> >>> On 5/4/19 8:19 PM, zna...@disroot.org wrote: >> >> (shell #~#$dash) -- compiles too, but again: >> >> bob $ su - mom >> Password: >> /gnu/store/bqmib4vf9mr8dkqx4dqpcqrnb93giwci-dash-0.5.10.2: >> /gnu/store/bqmib4vf9mr8dkqx4dqpcqrnb93giwci-dash-0.5.10.2: Is a directory >> bob $ >>> Could you perhaps provide some details on what you are expecting to >>> happen here? This error is expected - shell needs a path to an >>> executable, not a directory. Both `#~#$dash` and `dash` become paths to >>> directories. > > (file-append obj "some string") is a convenient alternative to > #~(string-append #$obj "some string"). > > In the latter "obj" becomes (for example) > "/gnu/store/bqmib4vf9mr8dkqx4dqpcqrnb93giwci-dash-0.5.10.2", and > "(string-append ...)" combines > "/gnu/store/bqmib4vf9mr8dkqx4dqpcqrnb93giwci-dash-0.5.10.2" and > "/bin/dash" to produce > "/gnu/store/bqmib4vf9mr8dkqx4dqpcqrnb93giwci-dash-0.5.10.2/bin/dash"
