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docs: be more precise on what spack add ... does (#23204)

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This is as much a question as it is a minor fine-tuning of the docs.  I've been known to add things to an environment by editing the `spack.yaml` file directly.  When I read the previous version of this sentence, I was afraid that `spack add` was actually doing *two* things, modifying the `spack.yaml` and updating something else that defined the roots of the Environment.  A bit of experimentation suggests that editing the `spack.yaml` file is sufficient to change the roots.

Co-authored-by: Adam J. Stewart <ajstewart426@gmail.com>
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George Hartzell 2021-04-23 06:29:19 -07:00 committed by GitHub
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lib/spack/docs/environments.rst
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@ -248,9 +248,9 @@ Users can add abstract specs to an Environment using the ``spack add``
command. The most important component of an Environment is a list of command. The most important component of an Environment is a list of
abstract specs. abstract specs.
Adding a spec adds to the manifest (the ``spack.yaml`` file) and to Adding a spec adds to the manifest (the ``spack.yaml`` file), which is
the roots of the Environment, but does not affect the concrete specs used to define the roots of the Environment, but does not affect the
in the lockfile, nor does it install the spec. concrete specs in the lockfile, nor does it install the spec.
The ``spack add`` command is environment aware. It adds to the The ``spack add`` command is environment aware. It adds to the
currently active environment. All environment aware commands can also currently active environment. All environment aware commands can also