Re: How to install prerelease package versions (particularly Emacs)

[Pierre Neidhardt]

Oleg, I tried reusing your package snippet from
http://lists.gnu.org/archive/html/help-guix/2017-09/msg00074.html
by setting

               (url "git://localhost/~ambrevar/projects/emacs")

but it fails for me:

        > guix build -K emacs
        @ build-started 
/gnu/store/f3gbd1y74vw1my0fmzlpz5cxkqqk423l-emacs-25.3-1.752fba9-checkout.drv - 
x86_64-linux 
/var/log/guix/drvs/f3//gbd1y74vw1my0fmzlpz5cxkqqk423l-emacs-25.3-1.752fba9-checkout.drv.bz2
        Initialized empty Git repository in 
/gnu/store/xrprmz45mi7njni6ypz4mad0ijf02r32-emacs-25.3-1.752fba9-checkout/.git/
        fatal: unable to connect to localhost:
        localhost[0: 127.0.0.1]: errno=Connection refused

        fatal: unable to connect to localhost:
        localhost[0: 127.0.0.1]: errno=Connection refused

        Backtrace:
                   4 (primitive-load "/gnu/store/cq0wvv65l9d7zn515dfg07jg3gr?")
        In ice-9/eval.scm:
           293:34  3 (_ #<directory (guile-user) 7ce140>)
        In ./guix/build/git.scm:
            48:10  2 (git-fetch "git://localhost/~ambrevar/projects/emacs" # ?)
        In ./guix/build/utils.scm:
            589:6  1 (invoke _ . _)
        In unknown file:
                   0 (scm-error misc-error #f "~A ~S" ("program \"/gnu/s?" ?) ?)

I'm not very familiar with the "git" protocol: does it require some
special configuration?

I also tried specifying a local path:

               (url "/home/ambrevar/projects/emacs")

but it seems that Guix' `git-reference` does not like it:

        > guix build -K emacs
        @ build-started 
/gnu/store/rvadb9sgi9dj0b3hlgpr3l91nbw9vvn0-emacs-25.3-1.752fba9-checkout.drv - 
x86_64-linux 
/var/log/guix/drvs/rv//adb9sgi9dj0b3hlgpr3l91nbw9vvn0-emacs-25.3-1.752fba9-checkout.drv.bz2
        Initialized empty Git repository in 
/gnu/store/xrprmz45mi7njni6ypz4mad0ijf02r32-emacs-25.3-1.752fba9-checkout/.git/
        fatal: '/home/ambrevar/projects/emacs' does not appear to be a git 
repository
        fatal: Could not read from remote repository.

        Please make sure you have the correct access rights
        and the repository exists.
        fatal: '/home/ambrevar/projects/emacs' does not appear to be a git 
repository
        fatal: Could not read from remote repository.

        Please make sure you have the correct access rights
        and the repository exists.
        Backtrace:
                   4 (primitive-load "/gnu/store/cq0wvv65l9d7zn515dfg07jg3gr?")
        In ice-9/eval.scm:
           293:34  3 (_ #<directory (guile-user) 7ce140>)
        In ./guix/build/git.scm:
            48:10  2 (git-fetch "/home/ambrevar/projects/emacs" "752fba992b?" ?)
        In ./guix/build/utils.scm:
            589:6  1 (invoke _ . _)
        In unknown file:
                   0 (scm-error misc-error #f "~A ~S" ("program \"/gnu/s?" ?) ?)

I think this is a bug: if git clone accepts local paths, then so should
git-reference.

--
Pierre Neidhardt

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