Hello Philip,

Philip Kaludercic <philipk@posteo.net> writes:

> How about this patch, that will use a temporary directory when
> `package-isolate' is invoked with a prefix argument (not sure what the
> default should be, I guess reusing `user-emacs-directory' is less
> surprising):
>
> [2. text/x-diff; 0001-Add-command-to-start-Emacs-with-specific-packages.patch]...

I was reading the code of the new version of `package--dependencies` and
had some questions:

--8<---------------cut here---------------start------------->8---
    (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))))
--8<---------------cut here---------------end--------------->8---

Why are you using `string=` to compare (car req) 
with (package-desc-name p)?

Isn't (apply #'append (mapcar #'cdr (package--alist))) same as
(mapcar #'cadr (package--alist))?

I am not a fan of named-let but isn't using deps as a second arg of
'more' more in the named-let spirit? (fully not tested)

--8<---------------cut here---------------start------------->8---
    (named-let more ((pkg-desc desc)
                     (deps nil))
      (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)))))
                    deps)))
      (delete-dups (cons pkg-desc deps)))
--8<---------------cut here---------------end--------------->8---

Thanks.

-- 
Thierry