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basics: move graph example to tcl (from hdf5) demo spack spec hdf5 #461

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alecbcs merged 1 commit into from
Jul 20, 2025
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basics: move graph example to tcl (from hdf5) demo spack spec hdf5 #461

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5 changes: 3 additions & 2 deletions outputs/basics.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -51,15 +51,16 @@ example basics/tcl-zlib-hash "spack install tcl ^/${zlib_hash}"

example basics/find-ldf "spack find -ldf"

example basics/graph-tcl "spack graph tcl"

example basics/hdf5-spec "spack spec hdf5"
example basics/hdf5 "spack install hdf5"
example basics/hdf5-no-mpi "spack install hdf5~mpi"

example basics/hdf5-hl-mpi "spack install hdf5+hl+mpi ^mpich"

example basics/find-ldf-2 "spack find -ldf"

example basics/graph-hdf5 "spack graph hdf5+hl+mpi ^mpich"

example basics/trilinos "spack install trilinos"

example basics/trilinos-hdf5 "spack install trilinos +hdf5 ^hdf5+hl+mpi ^mpich"
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21 changes: 14 additions & 7 deletions tutorial_basics.rst
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Expand Up @@ -166,9 +166,23 @@ Note that each package has a top-level entry, even if it also appears as a depen
.. literalinclude:: outputs/basics/find-ldf.out
:language: console

Spack models the dependencies of packages as a directed acyclic graph (DAG).
The ``spack find -d`` command shows the tree representation of that graph, which loses some dependency relationship information.
We can also use the ``spack graph`` command to view the entire DAG as a graph.

.. literalinclude:: outputs/basics/graph-tcl.out
:language: console

Let's move on to slightly more complicated packages.
HDF5 is a good example of a more complicated package, with an MPI dependency.
If we install it with default settings it will build with OpenMPI.
We can check the install plan in advance to ensure it's what we want to install using the ``spack spec`` command.
The ``spack spec`` command accepts the same spec syntax.

.. literalinclude:: outputs/basics/hdf5-spec.out
:language: console

Assuming we're happy with that configuration, we will now install it.

.. literalinclude:: outputs/basics/hdf5.out
:language: console
Expand Down Expand Up @@ -201,13 +215,6 @@ We'll do a quick check in on what we have installed so far.
.. literalinclude:: outputs/basics/find-ldf-2.out
:language: console

Spack models the dependencies of packages as a directed acyclic graph (DAG).
The ``spack find -d`` command shows the tree representation of that graph.
We can also use the ``spack graph`` command to view the entire DAG as a graph.

.. literalinclude:: outputs/basics/graph-hdf5.out
:language: console

HDF5 is more complicated than our basic example of zlib-ng and Tcl, but it's still within the realm of software that an experienced HPC user could reasonably expect to manually install given a bit of time.
Now let's look at an even more complicated package.

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