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;;; el-get --- Manage the external elisp bits and pieces you depend upon
;;
;; Copyright (C) 2010-2011 Dimitri Fontaine
;;
;; Author: Dimitri Fontaine <dim@tapoueh.org>
;; URL: http://www.emacswiki.org/emacs/el-get
;; GIT: https://github.com/dimitri/el-get
;; Licence: WTFPL, grab your copy here: http://sam.zoy.org/wtfpl/
;;
;; This file is NOT part of GNU Emacs.
;;
;; Install
;; Please see the README.asciidoc file from the same distribution

(require 'el-get-http)

(defun el-get-http-unpack-cleanup-extract-hook (package)
  "Cleanup after tar xzf: if there's only one subdir, move all the files up."

  (let* ((pdir (el-get-package-directory package))
(url (plist-get (el-get-package-def package) :url))
(tarfile (el-get-filename-from-url url))
(files (remove tarfile (directory-files pdir nil "[^.]$")))
(dir (car files)))
    (el-get-verbose-message "el-get: unpack cleanup %s [%s]: %S" package pdir files)
    ;; if there's only one directory, move its content up and get rid of it
    (when (and (not (cdr files))
               (file-directory-p (expand-file-name dir pdir)))
      (loop for fname in (directory-files
(expand-file-name dir pdir) nil "[^.]$")
for fullname = (expand-file-name fname (expand-file-name dir pdir))
for newname = (expand-file-name fname pdir)
do (progn
(el-get-verbose-message "mv %S %S" fullname newname)
(rename-file fullname newname)))
      (el-get-verbose-message "delete-directory: %s" (expand-file-name dir pdir))
      (delete-directory (expand-file-name dir pdir)))))

(defun el-get-http-tar-install (package url post-install-fun)
  "Dowload a tar archive package over HTTP."
  (let* ((source (el-get-package-def package))
(options (plist-get source :options))
(pdir (el-get-package-directory package))
(tarfile (el-get-filename-from-url url))
(dest (concat (file-name-as-directory pdir) tarfile))
(name (format "*tar %s %s*" options url))
(ok (format "Package %s installed." package))
(ko (format "Could not install package %s." package))
(post `(lambda (package)
                  ;; Remove all files from previous install before
                  ;; extracting the tar file.
                  (let ((files-to-delete (remove ,tarfile (directory-files ,pdir nil "[^.]$"))))
                    (loop for fname in files-to-delete
                          for fullpath = (expand-file-name fname ,pdir)
                          do (el-get-verbose-message "el-get-http-tar: Deleting old file %S" fname)
                          do (if (file-directory-p fullpath)
                                 (delete-directory fullpath 'recursive)
                               (delete-file fullpath))))
;; tar xzf `basename url`
(let ((el-get-sources '(,@el-get-sources)))
(el-get-start-process-list
package
'((:command-name ,name
:buffer-name ,name
:default-directory ,pdir
:program ,(executable-find "tar")
:args (,@options ,tarfile)
:message ,ok
:error ,ko))
,(symbol-function post-install-fun))))))
    (el-get-http-install package url post dest)))

(add-hook 'el-get-http-tar-install-hook 'el-get-http-unpack-cleanup-extract-hook)

(el-get-register-method :http-tar
  :install #'el-get-http-tar-install
  :update #'el-get-http-tar-install
  :remove #'el-get-rmdir
  :install-hook #'el-get-http-tar-install-hook
  :update-hook #'el-get-http-tar-install-hook)

(provide 'el-get-http-tar)
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