Merge branch 'master' into core-updates

Revert "gnu: gitolite: Fix shebangs in hooks."

This change embedded store references in the shebangs of scripts that
were meant to be copied out of the store. Those scripts would break when
the interpreters expected by the shebangs were garbage collected.

<https://debbugs.gnu.org/cgi/bugreport.cgi?bug=25966#28>

This reverts commit d0c16adb190c7244ee3ef1329cba78a015ae5d10.

Merge branch 'master' into core-updates

gnu: git: force GIT_EXEC_PATH to be single-entry

* gnu/packages/version-control.scm (git)[native-search-paths](separator):
New field.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu: gitolite: Fix shebangs in hooks.

Fixes <https://bugs.gnu.org/25957>.

* gnu/packages/version-control.scm (gitolite)[arguments]: Add 'fix-hooks-shebangs'
phase to fix references to '/usr/bin/perl'.

Signed-off-by: Leo Famulari <leo@famulari.name>

gnu: gitolite: Update to 3.6.6.

* gnu/packages/version-control.scm (gitolite): Update to 3.6.6.

Signed-off-by: Leo Famulari <leo@famulari.name>

Merge branch 'python-tests'

Merge branch 'master' into python-tests

gnu: git: Update to 2.12.0.

* gnu/packages/version-control.scm (git): Update to 2.12.0.

Merge remote-tracking branch 'origin/master' into core-updates

Merge branch 'master' into python-tests

gnu: libgit2: Propagate openssl and zlib.

* gnu/packages/version-control.scm (libgit2)[inputs]: Move OPENSSL
to...
[propagated-inputs]: ... here.  New field.

Merge branch 'master' into core-updates

gnu: git: Add GIT_EXEC_PATH search-path-specification.

Enables git plugins to be found when in they're in the system profile.

* gnu/packages/version-control.scm (git)[native-search-paths]: Add
  GIT_EXEC_PATH.  Remove git wrapper and outdated comment.

gnu: Add git-crypt.

* gnu/packages/version-control.scm (git-crypt): New variable.

gnu: git: Update to 2.11.1.

* gnu/packages/version-control.scm (git): Update to 2.11.1.

Merge branch 'master' into core-updates

search-paths: Allow specs with #f as their separator.

This adds support for single-entry search paths.
Fixes <http://bugs.gnu.org/25422>.
Reported by Leo Famulari <leo@famulari.name>.

* guix/search-paths.scm (<search-path-specification>)[separator]:
Document as string or #f.
(evaluate-search-paths): Add case for SEPARATOR as #f.
(environment-variable-definition): Handle SEPARATOR being #f.
* guix/build/utils.scm (list->search-path-as-string): Add case for
SEPARATOR as #f.
(search-path-as-string->list): Likewise.
* guix/build/profiles.scm (abstract-profile): Likewise.
* tests/search-paths.scm: New file.
* Makefile.am (SCM_TESTS): Add it.
* tests/packages.scm ("--search-paths with single-item search path"):
New test.
* gnu/packages/version-control.scm (git)[native-search-paths](separator):
New field.

gnu: stagit: Update to 0.5.

* gnu/packages/version-control.scm (stagit): Update to 0.5.

gnu: vc-dwim: Update to 1.8.

* gnu/packages/version-control.scm (vc-dwim): Update to 1.8.
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