auth.texi (Overview, Help for users, Help for developers): Update docs.
(Help for users): Talk about spaces.
sieve-manage.el: Autoload `auth-source-search'.
(sieve-sasl-auth): Use it.
nnimap.el: Autoload `auth-source-forget+'.
(nnimap-open-connection-1): Use it if the connection fails.
auth-source.el: Require `password-cache'.
(auth-source-hide-passwords, auth-source-cache): Remove and mark obsolete.
(auth-source-magic): Marker for `password-cache' keys.
(auth-source-do-cache): Update docstring.
(auth-source-search): Use and check cache.
(auth-source-forget-all-cached, auth-source-remember)
(auth-source-recall, auth-source-forget, auth-source-forget+)
(auth-source-specmatchp): Caching support functions.
(auth-source-forget-user-or-password, auth-source-forget-all-cached): Remove and obsolete.
(auth-source-user-or-password): Remove caching to further discourage using it. Always hide passwords.
password-cache.el (password-cache-remove): Accept secrets that are not strings.
mail-source.el: Autoload `auth-source-search'.
(mail-source-keyword-map): Note order matters.
(mail-source-set-1): Get all the mail-source source values and defaults and search auth-source on those if needed. This can all probably be simplified.
nnimap.el: Autoload `auth-source-search'.
(nnimap-credentials): Use it.
(nnimap-open-connection-1): Ask for the virtual server and physical address in one shot.
nntp.el: Autoload `auth-source-search'.
(nntp-send-authinfo): Use it. Note TODO.
auth-source.el (auth-source-secrets-search, auth-source-user-or-password): Use `append' instead of `nconc'.
(auth-source-user-or-password): Build return list better and protect against nil :secret.
auth-source.el (top): Require 'eieio unconditionally. Autoload `secrets-get-attributes' instead of `secrets-get-attribute'.
(auth-source-secrets-search): Limit search when `max' is greater than number of results.
auth-source.el (auth-source-secrets-search): Add examples.
auth-source.el (auth-sources): Allow for simpler defaults for Secrets API with a string "secrets:collection-name" and with 'default.
(auth-source-backend-parse): Parse "secrets:collection-name" and 'default. Recurse on parses instead of repeating code. Use the Secrets API is the source is not nil and 'ignore otherwise. Emit a message when ignoring a source.
(auth-source-search): List ignored search keys at the top level.
(auth-source-netrc-create): Use `case' instead of `cond'.
(auth-source-secrets-search): Created with TODOs.
(auth-source-secrets-create): Created with TODOs.
(auth-source-retrieve, auth-source-create, auth-source-delete)
(auth-source-protocol-defaults, auth-source-user-or-password-imap)
(auth-source-user-or-password-pop3, auth-source-user-or-password-ssh)
(auth-source-user-or-password-sftp)
(auth-source-user-or-password-smtp): Removed.
(auth-source-user-or-password): Deprecated and modified to be a wrapper around `auth-source-search'. Not tested thoroughly.
auth-source.el: Bring in assoc and eioeio libraries.
(secrets-enabled): New variable to track the status of the Secrets API.
(auth-source-backend): New EIOEIO class to represent a backend.
(auth-source-creation-defaults): New variable to set prompt defaults during token creation (see the `auth-source-search' docstring for details).
(auth-sources): Simplify to allow a simple string as a netrc backend spec.
(auth-source-backend-parse): Parse a backend from an `auth-sources' spec.
(auth-source-backend-parse-parameters): Fill in the backend parameters.
(auth-source-search): Main auth-source API entry point.
(auth-source-delete): Wrapper around `auth-source-search' for deletion.
(auth-source-search-collection): Helper function for searching.
(auth-source-netrc-parse, auth-source-netrc-normalize)
(auth-source-netrc-search, auth-source-netrc-create): Netrc backend. Supports search, create, and delete.
(auth-source-secrets-search, auth-source-secrets-create): Secrets API backend stubs.
(auth-source-user-or-password): Call `auth-source-search' but it's not ready yet.
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