Jim Porter f3408af0a3 Make '$?' and '$$' variables more consistent in Eshell ... Previously, '$?' (last exit code) was only useful for external commands, and '$$' (last result) was only useful for Lisp commands. * lisp/eshell/esh-cmd.el (eshell-lisp-form-nil-is-failure): New option. (eshell-lisp-command): Set last exit code to 1 when the command signals an error, and 2 if it returns nil (for Lisp forms only). * lisp/eshell/esh-proc.el (eshell-sentinel): Set last result to t if the command succeeded. * test/lisp/eshell/esh-cmd-tests.el (esh-cmd-test/while-loop-lisp-form, esh-cmd-test/until-loop-lisp-form) (esh-cmd-test/if-else-statement-lisp-form) (esh-cmd-test/if-else-statement-lisp-form-2) (esh-cmd-test/unless-else-statement-lisp-form): New tests. * test/lisp/eshell/esh-var-tests.el (esh-var-test/last-status-var-lisp-command) (esh-var-test/last-status-var-lisp-form) (esh-var-test/last-status-var-lisp-form-2) (esh-var-test/last-status-var-ext-cmd) (esh-var-test/last-status-var-ext-cmd): New tests. (esh-var-test/last-result-var2): Rename from this... ( esh-var-test/last-result-var-twice): ... to this. * doc/misc/eshell.texi (Variables): Update documentation about '$?' and '$$'. (Control Flow): Mention that '(lisp forms)' can be used as conditionals. * etc/NEWS: Announce this change (bug#57129).		2022-08-12 22:07:13 -07:00
..
emacs	Merge from origin/emacs-28	2022-08-07 12:57:53 +02:00
lispintro	Merge from origin/emacs-28	2022-08-13 06:30:27 +02:00
lispref	New debugging facility: backtraces from errors in Lisp called from redisplay	2022-08-11 19:31:09 +00:00
man	Merge from origin/emacs-28	2022-06-13 06:55:57 +02:00
misc	Make '$?' and '$$' variables more consistent in Eshell	2022-08-12 22:07:13 -07:00