Patch by Helmut Eller, lightly edited.
* lisp/progmodes/compile.el (compilation--start-time): New variable.
(compilation-start): Set it.
(compilation-handle-exit): Display duration.
It is meant to mark parts of compilation buffers which do not
correspond to process output (bug#59888).
* lisp/progmodes/compile.el (compilation-insert-annotation): New
function.
(compilation-start, compilation-handle-exit): Use it.
(compilation--ensure-parse) Rely on 'compilation-annotation' property
instead of 'compilation-header-end'.
* lisp/progmodes/compile.el (compilation-error-regexp-alist-alist):
Tighten regexps and simplify. Translate to rx.
* etc/compilation.txt: Add examples.
In collaboration with Jostein Kjønigsen.
* lisp/progmodes/compile.el (compilation-parse-errors-function): Remove.
(compilation--parse-region): Simplify accordingly.
(compilation--compat-parse-errors): Remove function, not used any more.
(compilation-error-list, compilation-parsing-end)
(compilation-old-error-list): Remove vars, not used any more.
(compilation-last-buffer): Mark as obsolete (sadly, forgot to do that
back in Emacs-22).
* lisp/textmodes/tex-mode.el: Remove old code that was needed for
Emacs<24.
* lisp/progmodes/prolog.el (prolog-consult-compile): Remove long-dead code.
(compilation-parse-errors-function): Remove declaration, not used any more.
(prolog-parse-sicstus-compilation-errors): Remove function, not used any more.
* lisp/progmodes/compile.el (compilation-error-regexp-alist-alist):
Don't allow spaces in the file names, to avoid false matches.
Don't allow ad-hoc spaces preceding the program name either.
* lisp/progmodes/compile.el (compilation-error-regexp-alist-alist):
Change from a mixture of traditional regexp syntax and rx,
to make intentions clearer.
* doc/emacs/building.texi (Compilation Mode): Document it.
* lisp/progmodes/compile.el (compilation-hidden-output): New user
option.
(compilation-filter): Use it.
(compilation--hide-output): New function.
* doc/emacs/building.texi (Compilation Mode): Document it.
* lisp/progmodes/compile.el
(compilation-auto-jump-to-first-error): Extend type.
(compilation--file-known-p): New function.
(compilation-auto-jump): Use it to support the new values
(bug#8228).
(compilation-find-file-1): Factored out into own function.
(compilation-find-file): Factored out from here.
* doc/emacs/building.texi (Compilation): Document it.
* lisp/progmodes/compile.el (compilation-max-output-line-length):
New user option (bug#44983).
(compilation-filter): Use it.
(compilation--insert-abbreviated-line): New function.
* lisp/progmodes/compile.el (compilation-error-regexp-alist-alist):
Remove the pattern ostensibly added for Ruby, because at closer
inspection it could never have matched anything. This lessens the
performance impact of the pattern added for GCC's -fanalyzer,
now slightly tweaked.
* lisp/progmodes/compile.el (compilation-find-file): Avoid
`expand-file-name' when computing the file names, because that will
reliably give the wrong result when there's symlinks and ".."
involved (bug#8035).
* lisp/progmodes/compile.el (compilation-error-properties):
When the end-column parameter of a compilation message rule
(in compilation-error-regexp-alist[-alist]) is a function, treat its
return value as if it were matched by the regexp, which is how it is
documented to work, and how all other parameters work.
* lisp/progmodes/compile.el (compilation-parse-errors):
Don't omit messages from the error count when FILE is a function
rather than a regexp match number.
* lisp/progmodes/compile.el (compilation-goto-locus): Pop to the
source buffer if the match buffer is the selected window (bug#47414).
Copyright-paperwork-exempt: yes
* lisp/net/tramp-integration.el
(tramp-compile-disable-ssh-controlmaster-options): New defun. Add
it to `compilation-mode-hook'. (Bug#45518)
* lisp/progmodes/compile.el (compilation-get-file-structure):
Revert commit 4ce5646d59, it isn't needed.
To scroll up/down the current displayed occurrence/error
without abandon the Occur/Grep buffer.
Add also a command 'recenter-other-window' to recenter
the other window from any kind of buffer.
* lisp/window.el (recenter-other-window): New command.
Bind recenter-other-window to S-M-C-l (Bug#46119).
* lisp/simple.el (recenter-current-error): New command.
* lisp/progmodes/grep.el (grep-mode-map):
Delete bidings for n and p.
* lisp/progmodes/compile.el (compilation-minor-mode-map):
Move here the n and p bindings.
Bind `recenter-current-error' to l.
* lisp/replace.el (occur-mode-map):
Same.
* doc/emacs/windows.texi (Other Window):
* doc/emacs/display.texi (Recentering):
Document recenter-other-window.
* etc/NEWS (Changes in Specialized Modes and Packages in Emacs 28.1):
Announce the changes.
* lisp/progmodes/compile.el (compilation-error-regexp-alist-alist):
Rule 'gradle-kotlin': don't be more forgiving than necessary; we know
exactly what the output looks like (see
https://github.com/JetBrains/kotlin/commit/\
ffe8ae3840d7b9bdc82170c8181031f05ced68bd) and there is no reason to
risk mismatches or expensive backtracking (bug#18109). Recognise
'info' level messages. Convert to rx.
