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Re: Which Emacs version used to build Emacs packages with emacs-checkout

From: Oleg Pykhalov
Subject: Re: Which Emacs version used to build Emacs packages with emacs-checkout?
Date: Fri, 22 Sep 2017 16:49:19 +0300
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.0.50 (gnu/linux)

Hello Alex,

Alex Kost <address@hidden> writes:

> Oleg Pykhalov (2017-09-07 21:49 +0300) wrote:
>> Hello Guix,
>> Here is a =emacs-checkout= snippet which works for me.  Enjoy it if
>> somebody need it.
>> I'm little bit confused about Emacs **version** that is used inside
>> =emacs-build-systems= and inputs which use =emacs-minimal=.
>> If I define a new package with =-checkout= suffix and install it, for
>> example =guix package -i address@hidden it works fine.
>> As I notice all packages which uses =emacs-build-system= will use
>> original Guix Emacs version package.  Am I right?
> Right, by default 'emacs-build-system' uses the current 'emacs-minimal'
> package.

OK, I made a new emacs-minimal-checkout package based on emacs-checkout.

--8<---------------cut here---------------start------------->8---
(define-public emacs-minimal-checkout
  ;; This is the version that you should use as an input to packages that just
  ;; need to byte-compile .el files.
    (inherit emacs-checkout)
    (name "emacs-minimal")
    (synopsis "The extensible text editor (used only for byte-compilation)")
    (build-system gnu-build-system)
     (substitute-keyword-arguments (package-arguments emacs)
       ((#:phases phases)
        `(modify-phases ,phases
           (delete 'install-site-start)))))
     `(("ncurses" ,ncurses)))
     `(("pkg-config" ,pkg-config)))))
--8<---------------cut here---------------end--------------->8---

--8<---------------cut here---------------start------------->8---
(define-public emacs-checkout
  (let ((commit "6d6dc246f93486fc8370399b6e1af8a17f371e4f")
        (revision "1"))
      (inherit emacs)
      (name "emacs")
      (version (string-append (package-version emacs) "-" revision "."
                              (string-take commit 7)))
         (method git-fetch)
         (uri (git-reference
               ;; "git://"
               (url "git://localhost/~natsu/src/emacs")
               (commit commit)))
         (file-name (string-append name "-" version "-checkout"))
         (patches (search-patches "emacs-exec-path.patch"
         (modules '((guix build utils)))
          ;; Delete the bundled byte-compiled elisp files and
          ;; generated autoloads.
          '(with-directory-excursion "lisp"
             (for-each delete-file
                       (append (find-files "." "\\.elc$")
                               (find-files "." "loaddefs\\.el$")))

             ;; Make sure Tramp looks for binaries in the right places on
             ;; remote GuixSD machines, where 'getconf PATH' returns
             ;; something bogus.
             (substitute* "net/tramp-sh.el"
               ;; Patch the line after "(defcustom tramp-remote-path".
                (format #f "(tramp-default-remote-path ~s ~s ~s ~s "
                        "~/.guix-profile/bin" "~/.guix-profile/sbin"
          (base32 "17x0jpyg6wrdh5wn9yf1135gkdcprbcx1hj2wiwla57dh7rihils"))))
       `(("autoconf" ,autoconf)
         ("automake" ,automake)
         ("bash" ,bash-minimal)
         ("perl" ,perl)
         ("rc" ,rc)
         ("python" ,python-2.7)
         ("chez-scheme" ,chez-scheme)
         ,@(package-native-inputs emacs)))
           `(#:parallel-build? #t
                               #:tests? #f
                               ,@(package-arguments emacs))
         ((#:phases phases)
          `(modify-phases ,phases
             (add-after 'unpack 'autogen
               (lambda _
                 (zero? (system* "sh" ""))))
             (delete 'reset-gzip-timestamps))))))))
--8<---------------cut here---------------end--------------->8---

>> Then, all Emacs packages will be build by =emacs-minimal= which is
>> original Guix Emacs version.
> Yes.  Note that this default emacs can be overrided on a package level
> by using #:emacs keyword in the arguments.  See 'emacs-auctex' package
> for example.

Ah, this is bad for me.  Now I need to redefine all those “#:emacs
,emacs” to “#:emacs ,emacs-checkout” as I guess.  Or I need to redefine
“emacs” variable instead of inherit it in “emacs-checkout”.

>> I found =(setq load-prefer-newer t)= way to avoid loading old compiled
>> elisp files, but it's not what I really want.
> This (I mean 'load-prefer-newer') is one of my favourite setting :-)
> But it is not clear for me, what do you really want?
>> Thoughts?  :-)
> Sorry, but I don't understand what you are asking about :-)

I want to have Emacs builded from my local Git repository.  And I also
want Emacs packages builded with this my Emacs version.

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