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-rw-r--r--guix/nar.scm222
1 files changed, 1 insertions, 221 deletions
diff --git a/guix/nar.scm b/guix/nar.scm
index b95cbd648d..bab727e65d 100644
--- a/guix/nar.scm
+++ b/guix/nar.scm
@@ -27,32 +27,18 @@
#:use-module (guix hash)
#:use-module (guix pki)
#:use-module (guix pk-crypto)
- #:use-module (rnrs bytevectors)
- #:use-module (rnrs io ports)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-11)
#:use-module (srfi srfi-26)
#:use-module (srfi srfi-34)
#:use-module (srfi srfi-35)
- #:use-module (ice-9 ftw)
- #:use-module (ice-9 match)
- #:export (nar-error?
- nar-error-port
- nar-error-file
-
- nar-read-error?
- nar-read-error-token
-
- nar-invalid-hash-error?
+ #:export (nar-invalid-hash-error?
nar-invalid-hash-error-expected
nar-invalid-hash-error-actual
nar-signature-error?
nar-signature-error-signature
- write-file
- restore-file
-
restore-file-set))
;;; Comment:
@@ -61,15 +47,6 @@
;;;
;;; Code:
-(define-condition-type &nar-error &error ; XXX: inherit from &nix-error ?
- nar-error?
- (file nar-error-file) ; file we were restoring, or #f
- (port nar-error-port)) ; port from which we read
-
-(define-condition-type &nar-read-error &nar-error
- nar-read-error?
- (token nar-read-error-token)) ; faulty token, or #f
-
(define-condition-type &nar-signature-error &nar-error
nar-signature-error?
(signature nar-signature-error-signature)) ; faulty signature or #f
@@ -79,203 +56,6 @@
(expected nar-invalid-hash-error-expected) ; expected hash (a bytevector)
(actual nar-invalid-hash-error-actual)) ; actual hash
-
-(define (dump in out size)
- "Copy SIZE bytes from IN to OUT."
- (define buf-size 65536)
- (define buf (make-bytevector buf-size))
-
- (let loop ((left size))
- (if (<= left 0)
- 0
- (let ((read (get-bytevector-n! in buf 0 (min left buf-size))))
- (if (eof-object? read)
- left
- (begin
- (put-bytevector out buf 0 read)
- (loop (- left read))))))))
-
-(define (write-contents file p size)
- "Write SIZE bytes from FILE to output port P."
- (define (call-with-binary-input-file file proc)
- ;; Open FILE as a binary file. This avoids scan-for-encoding, and thus
- ;; avoids any initial buffering. Disable file name canonicalization to
- ;; avoid stat'ing like crazy.
- (with-fluids ((%file-port-name-canonicalization #f))
- (let ((port (open-file file "rb")))
- (dynamic-wind
- (const #t)
- (cut proc port)
- (lambda ()
- (close-port port))))))
-
- (write-string "contents" p)
- (write-long-long size p)
- (call-with-binary-input-file file
- ;; Use `sendfile' when available (Guile 2.0.8+).
- (if (and (compile-time-value (defined? 'sendfile))
- (file-port? p))
- (cut sendfile p <> size 0)
- (cut dump <> p size)))
- (write-padding size p))
-
-(define (read-contents in out)
- "Read the contents of a file from the Nar at IN, write it to OUT, and return
-the size in bytes."
- (define executable?
- (match (read-string in)
- ("contents"
- #f)
- ("executable"
- (match (list (read-string in) (read-string in))
- (("" "contents") #t)
- (x (raise
- (condition (&message
- (message "unexpected executable file marker"))
- (&nar-read-error (port in)
- (file #f)
- (token x))))))
- #t)
- (x
- (raise
- (condition (&message (message "unsupported nar file type"))
- (&nar-read-error (port in) (file #f) (token x)))))))
-
- (let ((size (read-long-long in)))
- ;; Note: `sendfile' cannot be used here because of port buffering on IN.
- (dump in out size)
-
- (when executable?
- (chmod out #o755))
- (let ((m (modulo size 8)))
- (unless (zero? m)
- (get-bytevector-n in (- 8 m))))
- size))
-
-(define %archive-version-1
- ;; Magic cookie for Nix archives.
- "nix-archive-1")
-
-(define (write-file file port)
- "Write the contents of FILE to PORT in Nar format, recursing into
-sub-directories of FILE as needed."
- (define p port)
-
- (write-string %archive-version-1 p)
-
- (let dump ((f file))
- (let ((s (lstat f)))
- (write-string "(" p)
- (case (stat:type s)
- ((regular)
- (write-string "type" p)
- (write-string "regular" p)
- (if (not (zero? (logand (stat:mode s) #o100)))
- (begin
- (write-string "executable" p)
- (write-string "" p)))
- (write-contents f p (stat:size s)))
- ((directory)
- (write-string "type" p)
- (write-string "directory" p)
- (let ((entries
- ;; NOTE: Guile 2.0.5's 'scandir' returns all subdirectories
- ;; unconditionally, including "." and "..", regardless of the
- ;; 'select?' predicate passed to it, so we have to filter
- ;; those out externally.
- (filter (negate (cut member <> '("." "..")))
- ;; 'scandir' defaults to 'string-locale<?' to sort
- ;; files, but this happens to be case-insensitive (at
- ;; least in 'en_US' locale on libc 2.18.) Conversely,
- ;; we want files to be sorted in a case-sensitive
- ;; fashion.
- (scandir f (const #t) string<?))))
- (for-each (lambda (e)
- (let ((f (string-append f "/" e)))
- (write-string "entry" p)
- (write-string "(" p)
- (write-string "name" p)
- (write-string e p)
- (write-string "node" p)
- (dump f)
- (write-string ")" p)))
- entries)))
- ((symlink)
- (write-string "type" p)
- (write-string "symlink" p)
- (write-string "target" p)
- (write-string (readlink f) p))
- (else
- (raise (condition (&message (message "unsupported file type"))
- (&nar-error (file f) (port port))))))
- (write-string ")" p))))
-
-(define (restore-file port file)
- "Read a file (possibly a directory structure) in Nar format from PORT.
-Restore it as FILE."
- (let ((signature (read-string port)))
- (unless (equal? signature %archive-version-1)
- (raise
- (condition (&message (message "invalid nar signature"))
- (&nar-read-error (port port)
- (token signature)
- (file #f))))))
-
- (let restore ((file file))
- (define (read-eof-marker)
- (match (read-string port)
- (")" #t)
- (x (raise
- (condition
- (&message (message "invalid nar end-of-file marker"))
- (&nar-read-error (port port) (file file) (token x)))))))
-
- (match (list (read-string port) (read-string port) (read-string port))
- (("(" "type" "regular")
- (call-with-output-file file (cut read-contents port <>))
- (read-eof-marker))
- (("(" "type" "symlink")
- (match (list (read-string port) (read-string port))
- (("target" target)
- (symlink target file)
- (read-eof-marker))
- (x (raise
- (condition
- (&message (message "invalid symlink tokens"))
- (&nar-read-error (port port) (file file) (token x)))))))
- (("(" "type" "directory")
- (let ((dir file))
- (mkdir dir)
- (let loop ((prefix (read-string port)))
- (match prefix
- ("entry"
- (match (list (read-string port)
- (read-string port) (read-string port)
- (read-string port))
- (("(" "name" file "node")
- (restore (string-append dir "/" file))
- (match (read-string port)
- (")" #t)
- (x
- (raise
- (condition
- (&message
- (message "unexpected directory entry termination"))
- (&nar-read-error (port port)
- (file file)
- (token x))))))
- (loop (read-string port)))))
- (")" #t) ; done with DIR
- (x
- (raise
- (condition
- (&message (message "unexpected directory inter-entry marker"))
- (&nar-read-error (port port) (file file) (token x)))))))))
- (x
- (raise
- (condition
- (&message (message "unsupported nar entry type"))
- (&nar-read-error (port port) (file file) (token x))))))))
;;;
generated by cgit v1.2.3 (git 2.45.0) at 2024-12-14 18:58:05 +0000