From dd5da3d2f64f89994084012a3b7379aa78ae33f2 Mon Sep 17 00:00:00 2001 From: Philip Kaludercic Date: Tue, 15 Aug 2023 18:39:14 +0200 Subject: [PATCH] Add command to start Emacs with specific packages * lisp/emacs-lisp/package.el (package--dependencies): Extend function to handle and return package descriptors. (package-isolate): Add new command. * etc/NEWS: Announce new command. --- etc/NEWS | 9 +++++ lisp/emacs-lisp/package.el | 77 +++++++++++++++++++++++++++++++++++--- 2 files changed, 80 insertions(+), 6 deletions(-) diff --git a/etc/NEWS b/etc/NEWS index 57f04609679..dc213dcee42 100644 --- a/etc/NEWS +++ b/etc/NEWS @@ -505,6 +505,15 @@ project, that you can quickly select using 'project-switch-project' When non-nil, package specifications with side-effects for building software will be used when building a package. +--- +*** New command to start an inferior Emacs loading only specific packages. +The new command 'package-isolate' will start a new Emacs process, as +a sub-process of Emacs where you invoke the command, in a way that +causes the new process to load only some of the installed packages. +The command prompts for the packages to activate in this +sub-process, and is intended for testing Emacs and/or the packages +in a clean environment. + ** Flymake +++ diff --git a/lisp/emacs-lisp/package.el b/lisp/emacs-lisp/package.el index b3062d2608b..169d0d1360d 100644 --- a/lisp/emacs-lisp/package.el +++ b/lisp/emacs-lisp/package.el @@ -2330,12 +2330,26 @@ package-upgrade-all (mapc #'package-upgrade upgradeable)))) (defun package--dependencies (pkg) - "Return a list of all dependencies PKG has. -This is done recursively." - ;; Can we have circular dependencies? Assume "nope". - (when-let* ((desc (cadr (assq pkg package-archive-contents))) - (deps (mapcar #'car (package-desc-reqs desc)))) - (delete-dups (apply #'nconc deps (mapcar #'package--dependencies deps))))) + "Return a list of all recursive dependencies of PKG. +If PKG is a package descriptor, the return value will consist of +a list of package descriptors. If PKG is a symbol, designating a +package, the return value will be a list of symbols designating +packages." + (when-let* ((desc (if (package-desc-p pkg) pkg + (cadr (assq pkg package-archive-contents))))) + ;; Can we have circular dependencies? Assume "nope". + (let ((all (named-let more ((pkg-desc desc)) + (let (deps) + (dolist (req (package-desc-reqs pkg-desc)) + (setq deps (nconc + (catch 'found + (dolist (p (apply #'append (mapcar #'cdr (package--alist)))) + (when (and (string= (car req) (package-desc-name p)) + (version-list-<= (cadr req) (package-desc-version p))) + (throw 'found (more p))))) + deps))) + (delete-dups (cons pkg-desc deps)))))) + (remq pkg (mapcar (if (package-desc-p pkg) #'identity #'package-desc-name) all))))) (defun package-strip-rcs-id (str) "Strip RCS version ID from the version string STR. @@ -2625,6 +2639,57 @@ package-autoremove removable)) (message "Nothing to autoremove"))))) +(defun package-isolate (packages &optional temp-init) + "Start an uncustomised Emacs and only load a set of PACKAGES. +If TEMP-INIT is non-nil, or when invoked with a prefix argument, +the Emacs user directory is set to a temporary directory." + (interactive + (cl-loop for p in (cl-loop for p in (package--alist) append (cdr p)) + unless (package-built-in-p p) + collect (cons (package-desc-full-name p) p) into table + finally return + (list (cl-loop for c in (completing-read-multiple + "Isolate packages: " table + nil t) + collect (alist-get c table nil nil #'string=)) + current-prefix-arg))) + (let* ((name (concat "package-isolate-" + (mapconcat #'package-desc-full-name packages ","))) + (all-packages (delete-consecutive-dups + (sort (append packages (mapcan #'package--dependencies packages)) + (lambda (p0 p1) + (string< (package-desc-name p0) (package-desc-name p1)))))) + initial-scratch-message package-load-list) + (with-temp-buffer + (insert ";; This is an isolated testing environment, with these packages enabled:\n\n") + (dolist (package all-packages) + (push (list (package-desc-name package) + (package-version-join (package-desc-version package))) + package-load-list) + (insert ";; - " (package-desc-full-name package)) + (unless (memq package packages) + (insert " (dependency)")) + (insert "\n")) + (insert "\n") + (setq initial-scratch-message (buffer-string))) + (apply #'start-process (concat "*" name "*") nil + (list (expand-file-name invocation-name invocation-directory) + "--quick" "--debug-init" + "--init-directory" (if temp-init + (make-temp-file name t) + user-emacs-directory) + (format "--eval=%S" + `(progn + (setq initial-scratch-message ,initial-scratch-message) + + (require 'package) + ,@(mapcar + (lambda (dir) + `(add-to-list 'package-directory-list ,dir)) + (cons package-user-dir package-directory-list)) + (setq package-load-list ',package-load-list) + (package-initialize))))))) + ;;;; Package description buffer. -- 2.39.2