fetch git submodules recursively (#3779)
* fetch git submodules recursively This is useful if the submodules have submodules themselves. On the other hand doing a recursive update doesn't hurt if there is only one level. * fetch submodules with depth=1 as well (fix #2190) * use git submodule with depth only for git>=1.8.4
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Todd Gamblin

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@@ -854,7 +854,7 @@ Git fetching is enabled with the following parameters to ``version``:
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* ``tag``: name of a tag to fetch.
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* ``branch``: name of a branch to fetch.
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* ``commit``: SHA hash (or prefix) of a commit to fetch.
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* ``submodules``: Also fetch submodules when checking out this repository.
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* ``submodules``: Also fetch submodules recursively when checking out this repository.
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Only one of ``tag``, ``branch``, or ``commit`` can be used at a time.
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@@ -917,7 +917,8 @@ Commits
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Submodules
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You can supply ``submodules=True`` to cause Spack to fetch submodules
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along with the repository at fetch time.
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recursively along with the repository at fetch time. For more information
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about git submodules see the manpage of git: ``man git-submodule``.
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.. code-block:: python
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