I just discovered a bug in this advice that I suggested earlier in this thread.. I needed to fix the order of packages in the new-ret list that is returned. The bug was that the order of pkgs in new-ret was flipped compared to that in orig-ret.. so I needed to flip it back using reverse.
(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))
new-ret
pkg-name)
(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'.")
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))
new-ret))