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(require 'package)
(package-initialize)
(require 'package-recipe)
(require 'package-build)
(setq package-build-working-dir (expand-file-name "working/"))
(setq package-build-archive-dir (expand-file-name "packages/"))
(setq package-build-recipes-dir (expand-file-name "recipes/"))
;; Allow installing package tarfiles larger than 10MB
(setq large-file-warning-threshold nil)
(defun melpa2nix-build-package-1 (rcp version commit)
(let ((source-dir (package-recipe--working-tree rcp)))
(unwind-protect
(let ((files (package-build-expand-files-spec rcp t)))
(cond
((= (length files) 1)
(package-build--build-single-file-package
rcp version commit files source-dir))
((> (length files) 1)
(package-build--build-multi-file-package
rcp version commit files source-dir))
(t (error "Unable to find files matching recipe patterns")))))))
(defun melpa2nix-build-package ()
(if (not noninteractive)
(error "`melpa2nix-build-package' is to be used only with -batch"))
(pcase command-line-args-left
(`(,package ,version ,commit)
(melpa2nix-build-package-1 (package-recipe-lookup package) version commit))))
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