commands: `spack load --list` alias for `spack find --loaded` (#27184)

See #25249 and https://github.com/spack/spack/pull/27159#issuecomment-958163679.
This adds `spack load --list` as an alias for `spack find --loaded`.  The new command is
not as powerful as `spack find --loaded`, as you can't combine it with all the queries or
formats that `spack find` provides.  However, it is more intuitively located in the command
structure in that it appears in the output of `spack load --help`.

The idea here is that people can use `spack load --list`  for simple stuff but fall back to
`spack find --loaded` if they need more.

- add help to `spack load --list` that references `spack find`
- factor some parts of `spack find` out to be called from `spack load`
- add shell tests
- update docs

Co-authored-by: Peter Josef Scheibel <scheibel1@llnl.gov>
Co-authored-by: Richarda Butler <39577672+RikkiButler20@users.noreply.github.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/share/spack/setup-env.sh b/share/spack/setup-env.sh
index eb364a3809..5136e8a58a 100755
--- a/share/spack/setup-env.sh
+++ b/share/spack/setup-env.sh
@@ -180,6 +180,7 @@ _spack_shell_wrapper() {
             if [ "${_a#* --sh}" != "$_a" ] || \
                 [ "${_a#* --csh}" != "$_a" ] || \
                 [ "${_a#* -h}" != "$_a" ] || \
+                [ "${_a#* --list}" != "$_a" ] || \
                 [ "${_a#* --help}" != "$_a" ];
             then
                 # Args contain --sh, --csh, or -h/--help: just execute.