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in-directory: sort entries

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Make `in-directory` more like `directory-list` by sorting
directory content.
This commit is contained in:
Matthew Flatt 2016-09-11 08:43:50 -06:00
parent 903afe2240
commit cfb2a7aa32
2 changed files with 8 additions and 2 deletions
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7
pkgs/racket-doc/scribblings/reference/sequences.scrbl
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@ -443,6 +443,10 @@ each element in the sequence.
content of a directory, use the result of @racket[directory-list] as
a sequence.
The immediate content of each directory is reported as sorted by
@racket[path<?], and the content of a subdirectory is reported
before subsequent paths within the directory.
@examples[
(code:comment @#,t{Given a directory tree:})
(code:comment @#,t{})
@ -485,7 +489,8 @@ each element in the sequence.
"/example/c"))])
(printf "~a\n" p)))]
@history[#:changed "6.0.0.1" @elem{Added @racket[use-dir?] argument.}]}
@history[#:changed "6.0.0.1" @elem{Added @racket[use-dir?] argument.}
#:changed "6.6.0.4" @elem{Added guarantee of sorted results.}]}
@defproc*[([(in-producer [producer procedure?])

3
racket/collects/racket/private/for.rkt
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@ -6,6 +6,7 @@
"letstx-scheme.rkt"
"member.rkt"
"reverse.rkt"
"sort.rkt"
'#%unsafe
'#%flfxnum
(for-syntax '#%kernel
@ -2076,7 +2077,7 @@
eof)]])))
(define (dir-list full-d d acc)
(for/fold ([acc acc]) ([f (in-list (reverse (directory-list full-d)))])
(for/fold ([acc acc]) ([f (in-list (reverse (sort (directory-list full-d) path<?)))])
(cons (build-path d f) acc)))
(define (next-body l d init-dir use-dir?)