* distro/packages/libjpeg.scm (libjpeg-8): New variable.

* distro/packages/file.scm: New file.
* Makefile.am (MODULES): Add it.

* distro/packages/libjpeg.scm: New file.
* Makefile.am (MODULES): Add it.

* distro/packages/flex.scm (flex): Add Indent as input.

* distro/packages/indent.scm: New file.
* Makefile.am (MODULES): Add it.

* guix-package.in (profile-numbers): New procedure.
  (latest-profile-number): Use it.
  (previous-profile-number): New procedure.
  (roll-back): Use it lieu of `1-'.  Check whether PREVIOUS-NUMBER is
  zero, and raise an error when it is.
* tests/guix-package.sh: Test whether we can roll back over a "hole".

Based on a patch by Nikita Karetnikov <nikita@karetnikov.org>.

* guix-package.in (profile-regexp): New procedure.
  (latest-profile-number): Remove `%profile-rx', and use
  `profile-regexp' instead.
  (profile-number, roll-back): New procedure.
  (show-help): Add `--roll-back'.
  (%options): Likewise.
  (guix-package)[process-actions]: First check whether `roll-back?' is
  among OPTS, and call `roll-back' if it is, followed by a recursive
  call to `process-actions'.  Emit the "nothing to be done" message only
  when INSTALL or REMOVE is non-empty.
* tests/guix-package.sh (readlink_base): New function.
  Add tests for `--roll-back'.
* doc/guix.texi (Invoking guix-package): Document `--roll-back'.

* distro/packages/gnutls.scm (gnutls): Update to 3.1.6.

* guix/packages.scm (base32): Allow arguments that are not literal strings.

* distro/packages/nettle.scm (nettle): Update to 2.6.

* distro/packages/gdb.scm (gdb): Add Expat and Python as inputs.

* distro/packages/xml.scm: New file.
* Makefile.am (MODULES): Add it.

* doc/guix.texi (Defining Packages): Add cross-reference to
  "Derivations".
  (The Store): Add `build-derivations'.
  (Derivations): Populate.

* doc/guix.texi: Fix typos.
  (Invoking guix-daemon): Add details about `--disable-log-compression'
  and `--disable-store-optimization'.
  Reported by Nikita Karetnikov <nikita@karetnikov.org>.

* doc/guix.texi: Remove @documentlanguage, which confuses TeX.

* distro/packages/icu4c.scm: New file.
* Makefile.am (MODULES): Add it.

* distro/packages/python.scm: New file.
* Makefile.am (MODULES): Add it.

* doc/guix.texi (The Store): Populate.
  (Introduction): Add cross-reference.  Change "package store" to "the
  store".

* distro/packages/recutils.scm (recutils): Add Emacs, Check, and bc as
  dependencies.

* distro/packages/check.scm (check): Fix source URI.

* distro/packages/patches/bigloo-gc-shebangs.patch,
  distro/packages/patches/emacs-configure-sh.patch,
  distro/packages/patches/procps-make-3.82.patch: New files.
* Makefile.am (dist_patch_DATA): Add them.

* distro/packages/algebra.scm (bc): New variable.

* guix-package.in (%store): Change to a SRFI-39 parameter.  Update all users.
  (guix-package): Parametrize %STORE to an open connection after
  `parse-options' has been called.

* distro/packages/cyrus-sasl.scm: New file.
* Makefile.am (MODULES): Add it.

* Makefile.am: alphabetical ordering

* build-aux/download.scm (%url-base): Change to alpha.gnu.org.
* distro/packages/bootstrap.scm (%bootstrap-base-url): Rename to...
  (%bootstrap-base-urls): ... this.  Add alpha.gnu.org as the first
  URL.  Update users.

* guix/licenses.scm (psfl): New variable.

* distro/packages/scheme.scm: New file.
* Makefile.am (MODULES): Add it.

* guix/build-system/gnu.scm (gnu-build): Allow SOURCE to be #f.

* daemon.am (libutil_a_SOURCES): Remove nix/libutil/immutable.cc.
  (libutil_headers): Remove nix/libutil/immutable.hh.  These files were
  removed in Nix commit def5160 (post 1.2).
  Reported by Nikita Karetnikov <nikita@karetnikov.org>.

* guix/snix.scm (snix-derivation->guix-package)[pretty-uri]: When
  VERSION is #f, return URI.

Reported by Andreas Enge.

* guix-package.in (%profile-directory): Honor $NIX_STATE_DIR.
  (guix-package)[ensure-default-profile]: Use it.
  [process-actions]: Call it when the `profile' option is
  %CURRENT-PROFILE.
* tests/guix-package.sh: Add installation test with $HOME set, using the
  default profile.

* tests/guix-package.sh: Use "binutils:lib" instead of "libsigsegv:lib",
  since the latter no longer exists.

* guix-package.in (guix-package): When testing whether
  %USER-ENVIRONMENT-DIRECTORY exists, use `lstat' instead of
  `file-exists?'.  Reported by Andreas Enge.

* guix/licenses.scm (openldap2.8): New variable.

* distro/packages/algebra.scm (pari-gp): New variable.

* guix/store.scm (open-connection): Loop until `process-stderr' returns #t.

* distro/packages/openssl.scm: Add renamer for (guix licenses).  Adjust
  accordingly.