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nixpkgs/pkgs/build-support/emacs/elpa2nix.el
Rodney Lorrimar 9e56cddf13 emacsWithPackages: support installing larger packages
I was getting the following error building tide from Melpa:

    nix-build  -E '(import <nixpkgs> {}).emacs25WithPackages (p: [p.melpaPackages.tide])'

    File tide-20170509.1134.tar is large (10.2M), really open? (y or n) Error reading from stdin
    builder for ‘/nix/store/gs9ik7yf8iilsikkfing74i70m0diax3-emacs-tide-20170509.1134.drv’ failed with exit code 255
    cannot build derivation ‘/nix/store/m3p080aani4rw82llp8nqk93cw2nvirk-emacs-with-packages-25.2.drv’: 1 dependencies couldn't be built

Solution was to disable the large file warning threshold when
installing packages.
2017-05-29 12:56:09 +01:00

34 lines
1.1 KiB
EmacsLisp

(require 'package)
(package-initialize)
(defun elpa2nix-install-package ()
(if (not noninteractive)
(error "`elpa2nix-install-package' is to be used only with -batch"))
(pcase command-line-args-left
(`(,archive ,elpa)
(progn (setq package-user-dir elpa)
(elpa2nix-install-file archive)))))
(defun elpa2nix-install-from-buffer ()
"Install a package from the current buffer."
(let ((pkg-desc (if (derived-mode-p 'tar-mode)
(package-tar-file-info)
(package-buffer-info))))
;; Install the package itself.
(package-unpack pkg-desc)
pkg-desc))
(defun elpa2nix-install-file (file)
"Install a package from a file.
The file can either be a tar file or an Emacs Lisp file."
(let ((is-tar (string-match "\\.tar\\'" file)))
(with-temp-buffer
(if is-tar
(insert-file-contents-literally file)
(insert-file-contents file))
(when is-tar (tar-mode))
(elpa2nix-install-from-buffer))))
;; Allow installing package tarfiles larger than 10MB
(setq large-file-warning-threshold nil)