feature: add "spack tags" command (#26136)

This PR adds a "spack tags" command to output package tags or 
(available) packages with those tags. It also ensures each package
is listed in the tag cache ONLY ONCE per tag.

1 files changed, 11 insertions, 2 deletions

diff --git a/share/spack/spack-completion.bash b/share/spack/spack-completion.bash
index 1c971cb6c4..c34c954e5e 100755
--- a/share/spack/spack-completion.bash
+++ b/share/spack/spack-completion.bash
@@ -337,7 +337,7 @@ _spack() {
     then
         SPACK_COMPREPLY="-h --help -H --all-help --color -c --config -C --config-scope -d --debug --timestamp --pdb -e --env -D --env-dir -E --no-env --use-env-repo -k --insecure -l --enable-locks -L --disable-locks -m --mock -p --profile --sorted-profile --lines -v --verbose --stacktrace -V --version --print-shell-vars"
     else
-        SPACK_COMPREPLY="activate add analyze arch audit blame bootstrap build-env buildcache cd checksum ci clean clone commands compiler compilers concretize config containerize create deactivate debug dependencies dependents deprecate dev-build develop diff docs edit env extensions external fetch find flake8 gc gpg graph help info install license list load location log-parse maintainers mark mirror module monitor patch pkg providers pydoc python reindex remove rm repo resource restage solve spec stage style test test-env tutorial undevelop uninstall unit-test unload url verify versions view"
+        SPACK_COMPREPLY="activate add analyze arch audit blame bootstrap build-env buildcache cd checksum ci clean clone commands compiler compilers concretize config containerize create deactivate debug dependencies dependents deprecate dev-build develop diff docs edit env extensions external fetch find flake8 gc gpg graph help info install license list load location log-parse maintainers mark mirror module monitor patch pkg providers pydoc python reindex remove rm repo resource restage solve spec stage style tags test test-env tutorial undevelop uninstall unit-test unload url verify versions view"
     fi
 }
 
@@ -1206,7 +1206,7 @@ _spack_license_update_copyright_year() {
 _spack_list() {
     if $list_options
     then
-        SPACK_COMPREPLY="-h --help -d --search-description --format --update -v --virtuals -t --tag"
+        SPACK_COMPREPLY="-h --help -d --search-description --format --update -v --virtuals"
     else
         _all_packages
     fi
@@ -1668,6 +1668,15 @@ _spack_style() {
     fi
 }
 
+_spack_tags() {
+    if $list_options
+    then
+        SPACK_COMPREPLY="-h --help -i --installed -a --all"
+    else
+        SPACK_COMPREPLY=""
+    fi
+}
+
 _spack_test() {
     if $list_options
     then