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;; Time-stamp: <2018-02-20 16:39:46 kmodi>
;; Package management
;; Loading of packages at startup
;; Load newer version of .el and .elc if both are available
(setq load-prefer-newer t)
(>=e "27.0"
;; Lower-level `package.el' variables like `package-user-dir' need to be set
;; in early-init.el starting emacs 27.x.
(setq package-user-dir (let ((elpa-dir-name (format "elpa_%s" emacs-major-version))) ;default = "elpa"
(file-name-as-directory (expand-file-name elpa-dir-name user-emacs-directory)))))
;; Below require will auto-create `package-user-dir' it doesn't exist.
(require 'package)
(>=e "25.0"
(setq package-menu-async t)) ; If non-nil, do activities asynchronously, like refreshing menu
(defvar modi/elisp-directory (file-name-as-directory (expand-file-name "elisp" user-emacs-directory))
"Directory containing my custom elisp code.")
(add-to-list 'load-path modi/elisp-directory)
(add-to-list 'load-path (file-name-as-directory (expand-file-name "setup-files" user-emacs-directory)))
;; <prefix-dir>
;; ├── bin (`invocation-directory')
;; ├── share (`modi/default-share-directory')
;; │ ├── emacs
;; │ │ ├── site-lisp
;; │ │ ├── 27.0.50
;; │ │ │ ├── lisp (`modi/default-lisp-directory')
;; │ │ │ └── ..
;; │ │ └── ..
;; │ └── ..
;; └── ..
(defvar modi/default-share-directory nil
"Share directory for this Emacs installation.")
(defvar modi/default-lisp-directory nil
"Directory containing lisp files for the Emacs installation.
This value must match the path to the lisp/ directory of the
Emacs installation. If Emacs is installed using
--prefix=\"${PREFIX_DIR}\" this value would typically be
(let* ((bin-dir (when (and invocation-directory
(file-exists-p invocation-directory))
(file-truename invocation-directory)))
(prefix-dir (when bin-dir ;Because bin-dir = prefix-dir + "bin/"
(file-name-directory (directory-file-name bin-dir))))
(share-dir (when prefix-dir
(let ((share-dir-1 (file-name-as-directory (expand-file-name "share" prefix-dir))))
(when (file-exists-p share-dir-1)
(setq modi/default-share-directory share-dir-1))
(version-dir (when share-dir
(let* ((emacs-dir (file-name-as-directory (expand-file-name "emacs" share-dir)))
;; Possibility where the lisp dir is something like
;; ../emacs/26.0.50/lisp/. If `emacs-version' is
;; x.y.z.w, remove the ".w" portion.
(version (replace-regexp-in-string "\\([0-9]+\\.[0-9]+\\.[0-9]+\\).*" "\\1" emacs-version))
(version-dir-1 (file-name-as-directory (expand-file-name version emacs-dir))))
(if (file-exists-p version-dir-1)
;; Possibility where the lisp dir is something like
;; ../emacs/25.2/lisp/. If `emacs-version' is x.y.z,
;; remove the ".z" portion.
(setq version (replace-regexp-in-string "\\([0-9]+\\.[0-9]+\\).*" "\\1" emacs-version))
(setq version-dir-1 (file-name-as-directory (expand-file-name version emacs-dir)))
(when (file-exists-p version-dir-1)
;; (message "setup-packages:: bin-dir: %s" bin-dir)
;; (message "setup-packages:: prefix-dir: %s" prefix-dir)
;; (message "setup-packages:: share-dir: %s" share-dir)
;; (message "setup-packages:: version-dir: %s" version-dir)
(when version-dir
(let ((lisp-dir-1 (file-name-as-directory (expand-file-name "lisp" version-dir))))
(when (file-exists-p lisp-dir-1)
(setq modi/default-lisp-directory lisp-dir-1)))))
;; Add theme paths
(add-to-list 'custom-theme-load-path
(file-name-as-directory (expand-file-name "zenburn-emacs" modi/elisp-directory)))
(add-to-list 'custom-theme-load-path
(file-name-as-directory (expand-file-name "smyx" modi/elisp-directory)))
;; Add melpa package source when using package list
;; Fri Nov 17 17:05:12 EST 2017 - kmodi
;; The `system-type' for emacs in WSL is `gnu/linux' but it could be built
;; without TLS support. So make the below condition for `no-ssl' an OR condition
;; instead of an AND condition.
(let* ((no-ssl (or (memq system-type '(windows-nt ms-dos))
(not (gnutls-available-p))))
(protocol (if no-ssl
(melpa-url (concat protocol "://"))
(orgelpa-url (concat protocol "://")))
(add-to-list 'package-archives (cons "melpa" melpa-url) :append)
;; Install `org-plus-contrib' only when it's set to use the Elpa version of Org.
(when (eq modi/org-version-select 'elpa)
(add-to-list 'package-archives (cons "org" orgelpa-url))
(add-to-list 'my-packages 'org-plus-contrib))) ;Latest stable version of org-mode, includes org-eww
(>=e "27.0"
nil ;`package-initialize' call is not needed in emacs 27+
;; Load emacs packages and activate them
;; This must come before configurations of installed packages.
;; Don't delete this line.
;; `package-initialize' call is required before any of the below
;; can happen.
;; Auto install the required packages
(defvar modi/missing-packages '()
"List populated at each startup that contains the list of packages that need
to be installed.")
(dolist (p my-packages)
(unless (package-installed-p p)
(add-to-list 'modi/missing-packages p :append)))
(when modi/missing-packages
(message "Emacs is now refreshing its package database...")
;; Install the missing packages
(dolist (p modi/missing-packages)
(message "Installing `%s' .." p)
(package-install p))
(setq modi/missing-packages '()))
;; Mark packages to *not* to be updated
(defvar modi/package-menu-dont-update-packages '(org)
"List of packages for which the package manager should not look for updates.
Example: '(org org-plus-contrib).")
;; Do not upgrade Org using the package manager if it's set to *not* use the
;; Elpa version of Org.
(unless (eq modi/org-version-select 'elpa)
(add-to-list 'modi/package-menu-dont-update-packages 'org-plus-contrib))
(defun modi/package-menu-remove-excluded-packages (orig-fun &rest args)
"Remove the packages listed in `modi/package-menu-dont-update-packages' from
the `tabulated-list-entries' variable."
(let ((included (-filter
(lambda (entry)
(let ((pkg-name (package-desc-name (car entry))))
(not (member pkg-name modi/package-menu-dont-update-packages))))
(setq-local tabulated-list-entries included)
(apply orig-fun args)))
(advice-add 'package-menu--find-upgrades :around #'modi/package-menu-remove-excluded-packages)
;; (advice-remove 'package-menu--find-upgrades #'modi/package-menu-remove-excluded-packages)
;; Inspired from paradox.el
(defun my/package-upgrade-packages (&optional no-fetch)
"Upgrade all packages. No questions asked.
This function is equivalent to `list-packages', followed by a
`package-menu-mark-upgrades' and a `package-menu-execute'. Except
the user isn't asked to confirm deletion of packages.
The NO-FETCH prefix argument is passed to `list-packages'. It
prevents re-download of information about new versions. It does
not prevent downloading the actual packages (obviously)."
(interactive "P")
(let ((package-menu-async nil)) ; This variable was introduced in emacs 25.0
(package-list-packages no-fetch)
(package-menu-execute 'noquery))))
(defun modi/package-dependency-check-ignore (orig-ret)
"Remove the `black listed packages' from ORIG-RET.
Packages listed in the let-bound `pkg-black-list' will not be auto-installed
even if they are found as dependencies.
It is known that this advice is not effective when installed packages
asynchronously using `paradox'. Below is effective on synchronous
package installations."
(let ((pkg-black-list '(org))
;; (message "before %S" orig-ret)
(dolist (pkg-struct orig-ret)
(setq pkg-name (package-desc-name pkg-struct))
(if (member pkg-name pkg-black-list)
(message (concat "Package `%s' will not be installed. "
"See `modi/package-dependency-check-ignore'.")
;; (message "Package to be installed: %s" pkg-name)
(push pkg-struct new-ret)))
;; Tue Apr 11 17:48:16 EDT 2017 - kmodi
;; It's *very* critical that the order of packages stays the same in NEW-RET
;; as in ORIG-RET. The `push' command flips the order, so use `reverse'
;; to flip the order back to the original.
;; Without this step, you will get errors like below when installing
;; packages with dependencies:
;; Debugger entered--Lisp error: (error "Unable to activate package ‘nim-mode’.
;; Required package ‘flycheck-28’ is unavailable")
(setq new-ret (reverse new-ret))
;; (message "after %S" new-ret)
(advice-add 'package-compute-transaction :filter-return #'modi/package-dependency-check-ignore)
;; (advice-remove 'package-compute-transaction #'modi/package-dependency-check-ignore)
(defun modi/byte-recompile-elpa ()
"Force byte-compile every `.el' file in `package-user-dir'.
The `.el' files are re-compiled even if the corresponding `.elc' files exist,
in all the sub-directories under `package-user-dir'.
If the `.elc' file does not exist, this function *does not* compile the
corresponding `.el' file."
(byte-recompile-directory package-user-dir nil :force))
(provide 'setup-packages)