* build-aux/hydra/demo-os.scm: New file.
* Makefile.am (EXTRA_DIST): Add it.
* build-aux/hydra/gnu-system.scm (qemu-jobs): New procedure.
(hydra-jobs): Use it.
* guix/scripts/system.scm (read-operating-system): Export.
* doc/guix.texi (Defining Packages): Add 'arguments' field in the
example; update 'synopsis' and 'description'. Remove most of the
description of 'build-system', and instead reference to the "Build
Systems" node. Briefly describe 'arguments' field, and remove more
elaborate description. Add cross-reference to "Packaging Guidelines".
(Build Systems): New node.
(Packaging Guidelines): Mention '--log-file'.
* gnu/packages/patches/libssh-CVE-2014-0017.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.
* gnu/packages/ssh.scm (libssh-0.5): New variable.
(guile-ssh): Use it.
Fixes the creation of single-package profiles, reported by Ludovic Courtès.
* guix/build/union.scm (union-build): Add new internal procedure
'union-of-directories' that always creates a directory, containing the code
previously used only to merge multiple directories. Call it from the
multiple-directory case in 'union' and from the top-level 'union-build'.
* guix/pki.scm (write-acl): New procedure.
(ensure-acl): Use it. Fixes a regression introduced in 39831f1,
whereby 'ensure-acl' would yield a wrong-type-arg error.
* guix/scripts/archive.scm (authorize-key): Use 'write-acl'.
Before that, there was a small time window during which the GC could
wipe the .drv (before 'guix build' has been called), or the build
result (before 'retrieve-files' has started.)
* guix/scripts/offload.scm (remote-pipe): Add #:quote? parameter and
honor it.
(%gc-root-file): New variable.
(register-gc-root, remove-gc-root): New procedures.
(offload): Adjust comment. Run 'guix build' with '-r %GC-ROOT-FILE'.
(transfer-and-offload): Call 'register-gc-root' before
sending (derivation-file-name DRV). Call 'remove-gc-root' after the
call to 'offload' or 'retrieve-files'.
(send-files): Call 'remote-pipe' with #:quote? #f.
(retrieve-files): Likewise.
* guix/build/union.scm: Rewrite; only 'file=?' remains unchanged. Remove
'tree-union' and 'delete-duplicate-leaves' exports. Merge inputs in a
breadth-first fashion. Follow symlinks for purposes of making decisions
about the merge.
* tests/union.scm: Remove tests of 'tree-union' and 'delete-duplicate-leaves'.
Based on a patch by Dan Kennedy <danielk1977@gmail.com>.
* gnu/packages/patches/sqlite-large-page-size-fix.patch: New file.
* gnu/packages/sqlite.scm (sqlite): Add it.
* gnu-system.am (dist_patch_DATA): Add it.
* gnu/packages/zip.scm (zip): Eliminate custom configure phase which copied
and patched the Makefile. Instead add "-f" and "prefix" to make-flags, as
well as "MANDIR". Remove "generic_gcc" from the make-flags, so that it will
not be passed during other phases involving 'make'. Instead replace the
'build' phase with one that specifies the "generic_gcc" target.
Mark H Weaver