repair inconsistencies with simplify-path
CS didn't always return a complete path when simplifying in use-filesystem mode. On Windows, CS and BC were inconsistent with each other and the Unix behavior.
This commit is contained in:
Matthew Flatt
parent
6e3c111728
commit
39b37dd892
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@ -422,7 +422,8 @@ and (on Windows) without changing the case of letters within the
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path. If @racket[path] syntactically refers to a directory, the
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result ends with a directory separator.
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When @racket[path] is simplified and @racket[use-filesystem?] is true
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When @racket[path] is simplified other than just converting slashes
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to backslashes and @racket[use-filesystem?] is true
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(the default), a complete path is returned. If @racket[path] is
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relative, it is resolved with respect to the current directory.
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On @|AllUnix|, up-directory indicators are removed taking into account soft links (so
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@ -251,8 +251,8 @@ Windows paths are @techlink{cleanse}d as follows: In paths that start
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@litchar{\\?\}, redundant @litchar{\}s are removed, an extra
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@litchar{\} is added in a @litchar{\\?\REL} if an extra one is
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not already present to separate up-directory indicators from literal
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path elements, and an extra @litchar{\} is removed after
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@litchar{\\?\RED} if an extra one is present.
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path elements, and an extra @litchar{\} is similarly added after
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@litchar{\\?\RED} if an extra one is not already present.
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@;{>> I don't know what was meant to go in place of "???", and I can't
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figure out an example that could trigger this case: <<
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When @litchar{\\?\} acts as the drive and the path contains ???, two
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@ -453,6 +453,9 @@
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(test (path->directory-path (build-path 'same)) simplify-path (build-path 'same "a" 'same 'up 'same) #f)
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(arity-test simplify-path 1 2)
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(test (build-path "no-such-dir" "b") simplify-path "no-such-dir/b" #t)
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(test (path->complete-path (build-path "no-such-dir" "b")) simplify-path "no-such-dir//b" #t)
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(arity-test cleanse-path 1 1)
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(arity-test expand-user-path 1 1)
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(arity-test resolve-path 1 1)
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@ -631,6 +634,14 @@
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(string->path "\\\\?\\REL\\\\a")
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#f)
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(lambda () (split-path (coerce "\\\\?\\REL\\b\\a"))))
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(test-values (list (string->path "\\\\?\\REL\\b\\")
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(string->path "\\\\?\\REL\\\\a")
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#t)
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(lambda () (split-path (coerce "\\\\?\\REL\\b\\a\\"))))
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(test-values (list (string->path "\\")
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(string->path "\\\\?\\REL\\\\..")
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#t)
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(lambda () (split-path (string->path "\\\\?\\RED\\\\..\\"))))
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(test (string->path "\\\\?\\RED\\\\a\\") build-path (coerce "\\\\?\\RED\\a") 'same)
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(test (string->path "\\") build-path (coerce "\\\\?\\RED\\a") 'up)
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@ -779,13 +790,23 @@
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(test (string->path "\\\\?\\c:\\a\\.") cleanse-path (coerce "\\\\?\\c:\\a\\\\."))
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(test (string->path "\\\\?\\UNC\\a\\b\\.") cleanse-path (coerce "\\\\?\\UNC\\\\a\\b\\."))
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(test (string->path "\\\\?\\UNC\\a\\b\\.") cleanse-path (coerce "\\\\?\\UNC\\\\a\\b\\\\."))
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(test (string->path "\\\\?\\RED\\\\..") cleanse-path (coerce "\\\\?\\RED\\.."))
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(test (string->path "\\\\?\\RED\\\\..") cleanse-path (coerce "\\\\?\\RED\\\\.."))
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(test (string->path "\\\\?\\REL\\\\..") cleanse-path (coerce "\\\\?\\REL\\\\.."))
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(test (string->path "\\\\?\\RED\\\\..\\") cleanse-path (coerce "\\\\?\\RED\\\\..\\"))
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(test (string->path "\\\\?\\REL\\\\..\\") cleanse-path (coerce "\\\\?\\REL\\\\..\\"))
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(test (string->path "\\\\?\\") cleanse-path (coerce "\\\\?\\\\")))])
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(go cleanse-path)
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(test (string->path "\\\\?\\c:") cleanse-path (coerce "\\\\?\\c:"))
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(when (eq? 'windows (system-type))
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(go simplify-path))
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(go (lambda (p) (simplify-path p #f)))
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(test (string->path "\\\\?\\RED\\\\..") cleanse-path (coerce "\\\\?\\RED\\.."))
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(test (string->path "\\\\?\\RED\\\\..\\") cleanse-path (coerce "\\\\?\\RED\\..\\"))
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(when (eq? 'windows (system-type))
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(test (build-path (current-drive) "\\\\?\\REL\\\\..") simplify-path (coerce "\\\\?\\RED\\.."))
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(test (build-path (simplify-path (build-path (current-directory) 'up)) "\\\\?\\REL\\\\..")
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simplify-path
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(coerce "\\\\?\\REL\\..\\\\..")))
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(test (string->path "a\\b") simplify-path (coerce "a/b") #f)
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(test (string->path "a\\b\\") simplify-path (coerce "a/b/") #f)
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(test (string->path "C:\\") simplify-path (coerce "C://") #f)
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@ -796,6 +817,10 @@
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(test (bytes->path #"\\\\f\\g\\") simplify-path (coerce "\\\\f\\g") #f)
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(test (bytes->path #"\\\\f\\g\\") simplify-path (coerce "//f/g") #f)
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(when (eq? 'windows (system-type))
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;; just slash conversion: no path->complete-path
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(test (bytes->path #"no-such-dir\\g") simplify-path (coerce "no-such-dir/g") #t)
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(test (path->complete-path "no-such-dir\\g") simplify-path (coerce "no-such-dir//g") #t))
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(test (bytes->path #"\\\\?\\\\\\c:\\") simplify-path (coerce "\\\\?\\\\\\c:\\") #f)
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(test (bytes->path #"\\\\?\\\\\\c:") simplify-path (coerce "\\\\?\\\\\\c:") #f)
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@ -830,6 +855,7 @@
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(test (bytes->path #"\\\\?\\REL\\\\..") simplify-path (coerce "\\\\?\\REL\\\\..") #F)
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(test (bytes->path #"\\\\?\\REL\\\\..\\") simplify-path (coerce "\\\\?\\REL\\\\..\\") #F)
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(test (bytes->path #"a \\b") simplify-path (coerce "\\\\?\\REL\\\\a \\b") #f)
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(test (bytes->path #"\\\\?\\REL\\\\a \\b \\") simplify-path (coerce "\\\\?\\REL\\\\a \\b \\") #f)
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(test (bytes->path #"\\\\?\\REL\\\\aux.bad\\b") simplify-path (coerce "\\\\?\\REL\\aux.bad\\b") #f)
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(test (bytes->path #"\\\\?\\REL\\\\a\\b ") simplify-path (coerce "\\\\?\\REL\\a\\b ") #f)
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(test (bytes->path #"\\\\?\\REL\\\\.\\b") simplify-path (coerce "\\\\?\\REL\\.\\b") #f)
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@ -50,7 +50,7 @@
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(let ([omit (info 'compile-omit-paths (lambda () '()))])
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(if (eq? 'all omit)
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'all
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(map (lambda (e) (explode-path (simplify-path e)))
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(map (lambda (e) (explode-path (simplify-path e #f)))
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;; for backward compatibility
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(append omit (info 'compile-omit-files (lambda () '())))))))
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(cond
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@ -1,5 +1,6 @@
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#lang racket/base
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(require "../file/main.rkt"
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(require racket/fixnum
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"../file/main.rkt"
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(submod "../file/main.rkt" for-simplify)
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"path.rkt"
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"check.rkt"
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@ -30,7 +31,16 @@
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[else
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(define clean-p (cleanse-path/convert-slashes p))
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(cond
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[(simple? clean-p convention) clean-p]
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[(simple? clean-p convention)
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;; The choice of creating a complete path in this case seems like
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;; it was probably the wrong one. The special treatement for Windows
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;; reflects a compromise between consistency and old behavior (where
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;; the conversion to a compleet path did not happe in the old behavior)
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(if (or (not use-filesystem?)
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(and (eq? 'windows (system-type))
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(same-modulo-slashes? p clean-p)))
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clean-p
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(path->complete-path clean-p (current-directory)))]
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[else
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(define l (explode-path clean-p))
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(define simple-p
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@ -121,16 +131,14 @@
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(is-sep? b convention)))
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(cond
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[(and (eq? convention 'windows)
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(cond
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[(and
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(= len 2)
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(letter-drive-start? bstr 2))
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;; Letter drive without trailing separator
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#t]
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[(non-normal-backslash-backslash-questionmark? bstr)
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#t]
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[else #f]))
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(and (= len 2)
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(letter-drive-start? bstr 2)))
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;; Letter drive without trailing separator
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#f]
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[(and (eq? convention 'windows)
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(backslash-backslash-questionmark-simple-status bstr))
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=> (lambda (status)
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(eq? status 'simple))]
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[else
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(let loop ([i 0])
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(cond
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@ -161,12 +169,39 @@
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#f]
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[else (loop (add1 i))]))]))
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(define (non-normal-backslash-backslash-questionmark? bstr)
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(define (backslash-backslash-questionmark-simple-status bstr)
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(define-values (kind drive-len orig-drive-len clean-start-pos sep-bstr)
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(parse-backslash-backslash-questionmark bstr))
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;; We could try harder to recognize normal forms, but for now
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;; we assume that some normalization is needed in a \\?\ path.
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kind)
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(cond
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[(not kind) #f]
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[(and (fx= (bytes-ref bstr 4) (char->integer #\R))
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(fx= (bytes-ref bstr 5) (char->integer #\E)))
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;; For \\?\REL\ and \\?\RED\ paths, in use-filesystem mode,
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;; we don't want to convert to a complete path unless there's
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;; some simplification possible. Rebuild the path to see
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;; whether it's already normalized and simple.
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(let loop ([p (path bstr 'windows)] [accum '()] [as-dir? #f])
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(define-values (base-dir name dir?) (split-path p))
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(cond
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[(symbol? name) 'non-simple]
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[else
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(define new-accum (cons name accum))
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(define new-as-dir? (if (null? accum) dir? as-dir?))
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(cond
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[(path? base-dir) (loop base-dir new-accum new-as-dir?)]
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[else
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(define rebuilt0-p (apply build-path/convention-type 'windows new-accum))
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(define rebuilt-p (if new-as-dir?
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(path (bytes-append (path-bytes rebuilt0-p) #"\\") 'windows)
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rebuilt0-p))
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(define rebuilt-bstr (path-bytes (simplify-backslash-backslash-questionmark rebuilt-p)))
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(if (bytes=? bstr rebuilt-bstr)
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'simple
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'non-simple)])]))]
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[else
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;; Conservatively assume non-simple
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'non-simple]))
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;; ----------------------------------------
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@ -256,3 +291,19 @@
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(bytes-append #"\\\\?\\UNC" (subbytes bstr 8))]
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[else
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(bytes-append #"\\\\?\\UNC" (subbytes bstr 7))]))
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(define (same-modulo-slashes? p1 p2)
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(define bstr1 (path-bytes p1))
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(define bstr2 (path-bytes p2))
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(define len (bytes-length bstr1))
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(and (fx= len (bytes-length bstr2))
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(let loop ([i 0])
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(or (fx= i len)
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(and (let ([b1 (bytes-ref bstr1 i)]
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[b2 (bytes-ref bstr2 i)])
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(or (fx= b1 b2)
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(and (fx= b1 (char->integer #\\))
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(fx= b2 (char->integer #\/)))
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(and (fx= b1 (char->integer #\/))
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(fx= b2 (char->integer #\\)))))
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(loop (fx+ i 1)))))))
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@ -268,7 +268,9 @@
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(if (eqv? (bytes-ref bstr 8) (char->integer #\\))
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#""
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#"\\")
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(subbytes bstr 8))
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(subbytes bstr 8 (let ([len (bytes-length bstr)])
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(if is-dir? (sub1 len) len))))
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'windows))
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(cond
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[explode? (list elem base)]
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@ -3560,7 +3560,7 @@ static Scheme_Object *convert_literal_relative(Scheme_Object *file)
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return file;
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}
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static Scheme_Object *simplify_qm_path(Scheme_Object *path)
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static Scheme_Object *simplify_qm_path(Scheme_Object *path, int *has_rel)
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{
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/* path is already expanded, so the only remaining
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clean-ups are dropping a trailing separator,
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@ -3599,6 +3599,7 @@ static Scheme_Object *simplify_qm_path(Scheme_Object *path)
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start_special_check = lit_start;
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drive_end = lit_start - 1;
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} else if (drive_end < 0) {
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/* \\?\REL\ */
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int lit_start, dots_end;
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dots_end = get_slashslash_qm_dot_ups_end(s, len, &lit_start);
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if (lit_start == len) {
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@ -3609,6 +3610,7 @@ static Scheme_Object *simplify_qm_path(Scheme_Object *path)
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if (dots_end < 9)
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drive_end = lit_start; /* no dots, so just keep the literal part */
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else {
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*has_rel = 1;
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drive_end = 8; /* \\?\REL\..\, and we keep the .. */
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drop_extra_slash = dots_end;
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is_dir = 1;
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@ -3740,8 +3742,8 @@ static Scheme_Object *do_simplify_path(Scheme_Object *path, Scheme_Object *cycle
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int isdir, cleaned_slashes = 0, must_be_dir = 0, last_was_dir = 0, did_first = 0;
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Scheme_Object *file = scheme_false, *base;
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/* cleanse-path doesn't touch the filesystem. Always start with
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that, to get things basically tidy. */
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/* cleanse-path doesn't touch the filesystem. On Windows, always
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start with that, to get things basically tidy. */
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if (kind == SCHEME_WINDOWS_PATH_KIND) {
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char *s;
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int expanded, add_sep = 0;
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@ -3749,10 +3751,12 @@ static Scheme_Object *do_simplify_path(Scheme_Object *path, Scheme_Object *cycle
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NULL, &expanded, 0, 0, 0, kind, 0);
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{
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int slen;
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if (expanded)
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if (expanded) {
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cleaned_slashes = 1;
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slen = strlen(s);
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else
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} else
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slen = SCHEME_PATH_LEN(path);
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/* Note: not counting slash normalization as cleaned_slashes */
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s = do_normal_path_seps(s, &slen, 0, 0, SCHEME_WINDOWS_PATH_KIND, &expanded);
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}
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if (expanded) {
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@ -3792,7 +3796,7 @@ static Scheme_Object *do_simplify_path(Scheme_Object *path, Scheme_Object *cycle
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Also responsible for determining whether there's a
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redundant or missing trailing slash in the case that
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the path is just a root. */
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{
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if (!cleaned_slashes || !use_filesystem) {
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char *s;
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int len, i, saw_dot = 0;
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s = SCHEME_PATH_VAL(path);
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@ -3801,8 +3805,10 @@ static Scheme_Object *do_simplify_path(Scheme_Object *path, Scheme_Object *cycle
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if (kind == SCHEME_WINDOWS_PATH_KIND) {
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if (!skip && check_dos_slashslash_qm(s, len, NULL, NULL, NULL)) {
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if (!force_rel_up) {
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int drive_end;
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path = simplify_qm_path(path);
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Scheme_Object *orig_path = path;
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int drive_end, has_up = 0;
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path = simplify_qm_path(path, &has_up);
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cleaned_slashes = has_up;
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len = SCHEME_PATH_LEN(path);
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if (check_dos_slashslash_qm(SCHEME_PATH_VAL(path), len, &drive_end, NULL, NULL)) {
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/* If it's a drive... */
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@ -3811,7 +3817,10 @@ static Scheme_Object *do_simplify_path(Scheme_Object *path, Scheme_Object *cycle
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path = scheme_path_to_directory_path(path);
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}
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}
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return path;
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if (!SAME_OBJ(path, orig_path))
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cleaned_slashes = 1;
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if (!cleaned_slashes || !use_filesystem)
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return path;
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} else {
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/* force_rel_up means that we want a directory: */
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return scheme_path_to_directory_path(path);
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