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* lisp/emacs-lisp/package.el: Refactor package activation code

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(package-activate): Move code that activates dependencies into
package-activate-1.
(package--load-files-for-activation): New function.
(package-activate-1): Add code for (optionally) activating
dependencies, and move file-loading code into
`package--load-files-for-activation'.
This commit is contained in:
Artur Malabarba 2015-12-03 14:50:09 +00:00
parent 44d6957767
commit 67c6906a5f
1 changed files with 34 additions and 29 deletions
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63
lisp/emacs-lisp/package.el
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@ -646,8 +646,30 @@ PKG-DESC is a `package-desc' object."
(defvar Info-directory-list)
(declare-function info-initialize "info" ())
(defun package-activate-1 (pkg-desc &optional reload)
(defun package--load-files-for-activation (pkg-desc reload)
"Load files for activating a package given by PKG-DESC.
Load the autoloads file, and ensure `load-path' is setup. If
RELOAD is non-nil, also load all files in the package that
correspond to previously loaded files."
(let* ((loaded-files-list (when reload
(package--list-loaded-files (package-desc-dir pkg-desc)))))
;; Add to load path, add autoloads, and activate the package.
(package--activate-autoloads-and-load-path pkg-desc)
;; Call `load' on all files in `package-desc-dir' already present in
;; `load-history'. This is done so that macros in these files are updated
;; to their new definitions. If another package is being installed which
;; depends on this new definition, not doing this update would cause
;; compilation errors and break the installation.
(with-demoted-errors "Error in package--load-files-for-activation: %s"
(mapc (lambda (feature) (load feature nil t))
;; Skip autoloads file since we already evaluated it above.
(remove (file-truename (package--autoloads-file-name pkg-desc))
loaded-files-list)))))
(defun package-activate-1 (pkg-desc &optional reload deps)
"Activate package given by PKG-DESC, even if it was already active.
If DEPS is non-nil, also activate its dependencies (unless they
are already activated).
If RELOAD is non-nil, also `load' any files inside the package which
correspond to previously loaded files (those returned by
`package--list-loaded-files')."
@ -656,20 +678,15 @@ correspond to previously loaded files (those returned by
(unless pkg-dir
(error "Internal error: unable to find directory for `%s'"
(package-desc-full-name pkg-desc)))
(let* ((loaded-files-list (when reload
(package--list-loaded-files pkg-dir))))
;; Add to load path, add autoloads, and activate the package.
(package--activate-autoloads-and-load-path pkg-desc)
;; Call `load' on all files in `pkg-dir' already present in
;; `load-history'. This is done so that macros in these files are updated
;; to their new definitions. If another package is being installed which
;; depends on this new definition, not doing this update would cause
;; compilation errors and break the installation.
(with-demoted-errors "Error in package-activate-1: %s"
(mapc (lambda (feature) (load feature nil t))
;; Skip autoloads file since we already evaluated it above.
(remove (file-truename (package--autoloads-file-name pkg-desc))
loaded-files-list))))
;; Activate its dependencies recursively.
;; FIXME: This doesn't check whether the activated version is the
;; required version.
(when deps
(dolist (req (package-desc-reqs pkg-desc))
(unless (package-activate (car req))
(error "Unable to activate package `%s'.\nRequired package `%s-%s' is unavailable"
name (car req) (package-version-join (cadr req))))))
(package--load-files-for-activation pkg-desc reload)
;; Add info node.
(when (file-exists-p (expand-file-name "dir" pkg-dir))
;; FIXME: not the friendliest, but simple.
@ -721,7 +738,7 @@ DIR, sorted by most recently loaded last."
;; one was already activated. It also loads a features of this
;; package which were already loaded.
(defun package-activate (package &optional force)
"Activate package PACKAGE.
"Activate the package named PACKAGE.
If FORCE is true, (re-)activate it if it's already activated.
Newer versions are always activated, regardless of FORCE."
(let ((pkg-descs (cdr (assq package package-alist))))
@ -741,19 +758,7 @@ Newer versions are always activated, regardless of FORCE."
((and (memq package package-activated-list) (not force))
t)
;; Otherwise, proceed with activation.
(t
(let* ((pkg-vec (car pkg-descs))
(fail (catch 'dep-failure
;; Activate its dependencies recursively.
(dolist (req (package-desc-reqs pkg-vec))
(unless (package-activate (car req))
(throw 'dep-failure req))))))
(if fail
(warn "Unable to activate package `%s'.
Required package `%s-%s' is unavailable"
package (car fail) (package-version-join (cadr fail)))
;; If all goes well, activate the package itself.
(package-activate-1 pkg-vec force)))))))
(t (package-activate-1 (car pkg-descs) nil 'deps)))))
;;; Installation -- Local operations