build: Require Guile >= 2.0.13.

* README, configure.ac, doc/guix.texi (Requirements): Increase minimum
Guile version from 2.0.9 to 2.0.13.
* config-daemon.ac: Remove use of 'GUIX_CHECK_UNBUFFERED_CBIP'.
* m4/guix.m4 (GUIX_CHECK_UNBUFFERED_CBIP): Remove.
* guix/build/download.scm (current-http-proxy): Remove.
* guix/build/syscalls.scm (%libc-errno-pointer, errno): Remove.
(syscall->procedure): Use #:return-errno unconditionally.
* guix/hash.scm (open-sha256-input-port)[unbuffered]: Remove outdated
comment.
* guix/http-client.scm (when-guile<=2.0.5-or-otherwise-broken): Remove.
<top level>: Remove 'when-guile<=2.0.5-or-otherwise-broken' block.
* guix/scripts/substitute.scm (fetch): Remove 'guile-version>?'
conditional.
* tests/hash.scm (supports-unbuffered-cbip?): Remove.
<top level>: Remove 'test-skip' call.

1 files changed, 1 insertions, 153 deletions

diff --git a/guix/http-client.scm b/guix/http-client.scm
index bab31875d1..e8a2a23fc5 100644
--- a/guix/http-client.scm
+++ b/guix/http-client.scm
@@ -1,5 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2012, 2013, 2014, 2015, 2016, 2017 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2012, 2013, 2014, 2015, 2016, 2017, 2018 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2015 Mark H Weaver <mhw@netris.org>
 ;;; Copyright © 2012, 2015 Free Software Foundation, Inc.
 ;;; Copyright © 2017 Tobias Geerinckx-Rice <me@tobias.gr>
@@ -69,158 +69,6 @@
   (reason http-get-error-reason))                 ; string
 
 
-(define-syntax when-guile<=2.0.5-or-otherwise-broken
-  (lambda (s)
-    (syntax-case s ()
-      ((_ body ...)
-       ;; Always emit BODY, regardless of VERSION, because sometimes this code
-       ;; might be compiled with a recent Guile and run with 2.0.5---e.g.,
-       ;; when using "guix pull".
-       #'(begin body ...)))))
-
-(when-guile<=2.0.5-or-otherwise-broken
- ;; Backport of Guile commits 312e79f8 ("Add HTTP Chunked Encoding support to
- ;; web modules."), 00d3ecf2 ("http: Do not buffer HTTP chunks."), and 53b8d5f
- ;; ("web: Gracefully handle premature EOF when reading chunk header.")
-
- (use-modules (ice-9 rdelim))
-
- (define %web-http
-   (resolve-module '(web http)))
-
- ;; Chunked Responses
- (define (read-chunk-header port)
-   "Read a chunk header from PORT and return the size in bytes of the
- upcoming chunk."
-   (match (read-line port)
-     ((? eof-object?)
-      ;; Connection closed prematurely: there's nothing left to read.
-      0)
-     (str
-      (let ((extension-start (string-index str
-                                           (lambda (c)
-                                             (or (char=? c #\;)
-                                                 (char=? c #\return))))))
-        (string->number (if extension-start       ; unnecessary?
-                            (substring str 0 extension-start)
-                            str)
-                        16)))))
-
- (define* (make-chunked-input-port port #:key (keep-alive? #f))
-   "Returns a new port which translates HTTP chunked transfer encoded
-data from PORT into a non-encoded format. Returns eof when it has
-read the final chunk from PORT. This does not necessarily mean
-that there is no more data on PORT. When the returned port is
-closed it will also close PORT, unless the KEEP-ALIVE? is true."
-   (define (close)
-     (unless keep-alive?
-       (close-port port)))
-
-   (define chunk-size 0)     ;size of the current chunk
-   (define remaining 0)      ;number of bytes left from the current chunk
-   (define finished? #f)     ;did we get all the chunks?
-
-   (define (read! bv idx to-read)
-     (define (loop to-read num-read)
-       (cond ((or finished? (zero? to-read))
-              num-read)
-             ((zero? remaining)                    ;get a new chunk
-              (let ((size (read-chunk-header port)))
-                (set! chunk-size size)
-                (set! remaining size)
-                (if (zero? size)
-                    (begin
-                      (set! finished? #t)
-                      num-read)
-                    (loop to-read num-read))))
-             (else                           ;read from the current chunk
-              (let* ((ask-for (min to-read remaining))
-                     (read    (get-bytevector-n! port bv (+ idx num-read)
-                                                 ask-for)))
-                (if (eof-object? read)
-                    (begin                         ;premature termination
-                      (set! finished? #t)
-                      num-read)
-                    (let ((left (- remaining read)))
-                      (set! remaining left)
-                      (when (zero? left)
-                        ;; We're done with this chunk; read CR and LF.
-                        (get-u8 port) (get-u8 port))
-                      (loop (- to-read read)
-                            (+ num-read read))))))))
-     (loop to-read 0))
-
-   (make-custom-binary-input-port "chunked input port" read! #f #f close))
-
- ;; Chunked encoding support in Guile <= 2.0.11 would load whole chunks in
- ;; memory---see <http://bugs.gnu.org/19939>.
- (when (module-variable %web-http 'read-chunk-body)
-   (module-set! %web-http 'make-chunked-input-port make-chunked-input-port))
-
- (define (make-delimited-input-port port len keep-alive?)
-   "Return an input port that reads from PORT, and makes sure that
-exactly LEN bytes are available from PORT.  Closing the returned port
-closes PORT, unless KEEP-ALIVE? is true."
-   (define bytes-read 0)
-
-   (define (fail)
-     ((@@ (web response) bad-response)
-      "EOF while reading response body: ~a bytes of ~a"
-      bytes-read len))
-
-   (define (read! bv start count)
-     ;; Read at most LEN bytes in total.  HTTP/1.1 doesn't say what to do
-     ;; when a server provides more than the Content-Length, but it seems
-     ;; wise to just stop reading at LEN.
-     (let ((count (min count (- len bytes-read))))
-       (let loop ((ret (get-bytevector-n! port bv start count)))
-         (cond ((eof-object? ret)
-                (if (= bytes-read len)
-                    0                              ; EOF
-                    (fail)))
-               ((and (zero? ret) (> count 0))
-                ;; Do not return zero since zero means EOF, so try again.
-                (loop (get-bytevector-n! port bv start count)))
-               (else
-                (set! bytes-read (+ bytes-read ret))
-                ret)))))
-
-   (define close
-     (and (not keep-alive?)
-          (lambda ()
-            (close-port port))))
-
-   (make-custom-binary-input-port "delimited input port" read! #f #f close))
-
- (define (read-header-line port)
-   "Read an HTTP header line and return it without its final CRLF or LF.
-Raise a 'bad-header' exception if the line does not end in CRLF or LF,
-or if EOF is reached."
-   (match (%read-line port)
-     (((? string? line) . #\newline)
-      ;; '%read-line' does not consider #\return a delimiter; so if it's
-      ;; there, remove it.  We are more tolerant than the RFC in that we
-      ;; tolerate LF-only endings.
-      (if (string-suffix? "\r" line)
-          (string-drop-right line 1)
-          line))
-     ((line . _)                                ;EOF or missing delimiter
-      ((@@ (web http) bad-header) 'read-header-line line))))
-
- (unless (guile-version>? "2.0.11")
-   ;; Guile <= 2.0.9 had a bug whereby 'response-body-port' would read more
-   ;; than what 'content-length' says.  See Guile commit 802a25b.
-   ;; Guile <= 2.0.11 had a bug whereby the 'close' method of the response
-   ;; body port would fail with wrong-arg-num.  See Guile commit 5a10e41.
-   (module-set! (resolve-module '(web response))
-                'make-delimited-input-port make-delimited-input-port)
-
-   ;; Guile <= 2.0.11 was affected by <http://bugs.gnu.org/22273>.  See Guile
-   ;; commit 4c7732c.
-   (when (module-variable %web-http 'read-line*)
-     (module-set! %web-http 'read-line* read-header-line))))
-
-
 (define* (http-fetch uri #:key port (text? #f) (buffered? #t)
                      keep-alive? (verify-certificate? #t)
                      (headers '((user-agent . "GNU Guile"))))