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shell: Suggest running '--check' once for interactive use.

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* guix/scripts/shell.scm (hint-directory, hint-file, record-hint)
(hint-given?): New procedures.
(guix-shell): Record and probe the 'shell-check' hint.
This commit is contained in:
Ludovic Courtès 2021-10-19 11:50:14 +02:00
parent 9e46942c1c
commit 409f538d65
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GPG key ID: 090B11993D9AEBB5
1 changed files with 39 additions and 1 deletions
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40
guix/scripts/shell.scm
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@ -331,6 +331,29 @@ (define (profile-cached-gc-root file)
(#f #f)
(key (string-append (%profile-cache-directory) "/" key))))
;;;
;;; One-time hints.
;;;
(define (hint-directory)
"Return the directory name where previously given hints are recorded."
(string-append (cache-directory #:ensure? #f) "/hints"))
(define (hint-file hint)
"Return the name of the file that marks HINT as already printed."
(string-append (hint-directory) "/" (symbol->string hint)))
(define (record-hint hint)
"Mark HINT as already given."
(let ((file (hint-file hint)))
(mkdir-p (dirname file))
(close-fdes (open-fdes file (logior O_CREAT O_WRONLY)))))
(define (hint-given? hint)
"Return true if HINT was already given."
(file-exists? (hint-file hint)))
(define-command (guix-shell . args)
(category development)
@ -348,7 +371,22 @@ (define* (entry-expiration file)
(#f 0) ;FILE may have been deleted in the meantime
(st (+ (stat:atime st) (* 60 60 24 7)))))
(let ((result (guix-environment* (parse-args args))))
(define opts
(parse-args args))
(define interactive?
(not (assoc-ref opts 'exec)))
(if (assoc-ref opts 'check?)
(record-hint 'shell-check)
(when (and interactive?
(not (hint-given? 'shell-check))
(not (assoc-ref opts 'container?))
(not (assoc-ref opts 'search-paths)))
(display-hint (G_ "Consider passing the @option{--check} option once
to make sure your shell does not clobber environment variables."))) )
(let ((result (guix-environment* opts)))
(maybe-remove-expired-cache-entries (%profile-cache-directory)
cache-entries
#:entry-expiration entry-expiration)