distro: Switch to Linux-Libre.

* distro/packages/base.scm (linux-headers): Rename to...
  (linux-libre-headers): ... this.  Change `name', `source', and
  `description', and `home-page' accordingly.  Update users.
  (linux-headers-boot0): Rename to...
  (linux-libre-headers-boot0): ... this.  Update users.

distro: Use our own pre-built Guile to bootstrap.

* distro/packages/base.scm (%bootstrap-guile): Build from a tarball
  containing a pre-built Guile.

* distro.scm (%bootstrap-binaries-directory): New variable.
  (search-bootstrap-binary): New procedure.

* Makefile.am (bootstrapdir, bootstrap_x86_64_linuxdir,
  dist_bootstrap_x86_64_linux_DATA, DISTCLEANFILES, DOWNLOAD_FILE): New
  variables.
  (distro/packages/bootstrap/x86_64-linux/guile-bootstrap-2.0.6.tar.xz):
  New rule.
  (EXTRA_DIST): Add `build-aux/download.scm'.
  (.scm.go): Define the `DISTRO_BOOTSTRAP_DIRECTORY' and
  `DISTRO_INSTALLED_BOOTSTRAP_DIRECTORY' environment variables.

* pre-inst-env.in: Define `DISTRO_BOOTSTRAP_DIRECTORY'.

* build-aux/download.scm: New file.
* distro/packages/bootstrap/x86_64-linux/{bash, mkdir, tar, xz}: New
  files.

distro: Add package that builds a tarball of the bootstrap Guile.

* distro/packages/base.scm (%guile-static-stripped): New variable.

distro: Add patch to allow the bootstrap Guile to work without iconv.

* distro/patches/guile-default-utf8.patch: New file.
* Makefile.am (dist_patch_DATA): Add it.

* distro/packages/base.scm (%guile-static): Use it.
  (%guile-static-stripped): Add call to `remove-store-references'.

distro: Change relocatable-Guile patch to work around broken argv[0].

* distro/patches/guile-relocatable.patch: Change to use /proc/self/exe
  instead of PROGRAM_INVOCATION_NAME.  Useful because Nix itself passes
  just the basename of builders that it executes.

build: Use `pre-inst-env' to run tests.

* Makefile.am (TESTS_ENVIRONMENT): Remove.
  (LOG_COMPILER): Use `pre-inst-env'.

release.nix: Add dependency on GNU Texinfo.

* release.nix (tarball)[buildNativeInputs]: Add `texinfo'.

utils: Add `fold-port-matches' and `remove-store-references'.

* guix/build/utils.scm (fold-port-matches, remove-store-references): New
  procedures.

* tests/build-utils.scm ("fold-port-matches", "fold-port-matches,
  trickier", "fold-port-matches, with unmatched chars"): New tests.

utils: Add `with-atomic-file-replacement'.

* guix/build/utils.scm (with-atomic-file-replacement): New procedure.
  (substitute): Use it.

distro: Add a statically-linked, relocatable Guile 2.0 package.

* distro/packages/base.scm (%guile-static, %guile-static-stripped): New
  variables.

* distro/patches/guile-relocatable.patch: New file.
* Makefile.am (dist_patch_DATA): Add it.

ftp-client: Try all the addresses returned by `getaddrinfo'.

* guix/ftp-client.scm (ftp-open): Upon connection failure, try the other
  addresses returned by `getaddrinfo'.

doc: Add the stub of a manual.

* doc/guix.texi: New file.
* doc/fdl-1.3.texi: New file, copied from Gnulib.

* Makefile.am (info_TEXINFOS): New variable.
  (EXTRA_DIST): Add `doc/fdl-1.3.texi'.

distro: Add missing bits from previous commit.

* distro/packages/base.scm (default-keyword-arguments): New procedure.

distro: First stab at building statically-linked bootstrap binaries.

* distro/packages/base.scm (static-package): New procedure.
  (%bash-static, %static-inputs, %static-binaries): New variables.

Remove non-existent module from (guix).

* guix.scm (%public-modules): Remove `snix', since that modules doesn't
  exist yet.

packages: Fix and optimize memoization of `package-derivation'.

* guix/packages.scm (%derivation-cache): Pass an initial size of 100.
  (cache): Use `hashq-set!', and use a SYSTEM/DRV pair as the value.
  (cached-derivation): Update accordingly.

packages: Micro-optimize `package-derivation'.

* guix/packages.scm (package-derivation): Move `cache' call before the
  traversal of PACKAGE's inputs.

derivations: Set input port to UTF-8 in `read-derivation'.

* guix/derivations.scm (read-derivation): Set DRV-PORT's encoding to
  UTF-8.

Update the (guix) module.

* guix.scm (%public-modules): Update list of current second-level
  modules.

tests: Use bootstrap and Nixpkgs inputs to be less costly.

* tests/builders.scm (%bootstrap-inputs, %bootstrap-guile): New
  variables.
  ("gnu-build"): Use them, by setting `#:implicit-inputs? #f' and `#:guile'.

* tests/packages.scm (%bootstrap-inputs, %bootstrap-guile): New
  variables.
  ("trivial"): Pass `#:guile %bootstrap-guile'.
  ("GNU Hello"): Use `package-with-explicit-inputs' to use
  %BOOTSTRAP-GUILE and %BOOTSTRAP-INPUTS.