Add -t short option for spack --backtrace (spack#47227)

Signed-off-by: Todd Gamblin <[email protected]>

lib/spack/spack/main.py

@@ -489,6 +489,7 @@ def make_argument_parser(**kwargs):
         help="add stacktraces to all printed statements",
     )
     parser.add_argument(
+        "-t",
         "--backtrace",
         action="store_true",
         default="SPACK_BACKTRACE" in os.environ,

share/spack/spack-completion.bash

@@ -399,7 +399,7 @@ SPACK_ALIASES="concretise:concretize;containerise:containerize;rm:remove"
 _spack() {
     if $list_options
     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 -b --bootstrap -p --profile --sorted-profile --lines -v --verbose --stacktrace --backtrace -V --version --print-shell-vars"
+        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 -b --bootstrap -p --profile --sorted-profile --lines -v --verbose --stacktrace -t --backtrace -V --version --print-shell-vars"
     else
         SPACK_COMPREPLY="add arch audit blame bootstrap build-env buildcache cd change checksum ci clean clone commands compiler compilers concretize concretise config containerize containerise create debug deconcretize dependencies dependents deprecate dev-build develop diff docs edit env extensions external fetch find gc gpg graph help info install license list load location log-parse logs maintainers make-installer mark mirror module 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

share/spack/spack-completion.fish

@@ -347,7 +347,7 @@ complete -c spack --erase
 # Everything below here is auto-generated.
 
 # spack
-set -g __fish_spack_optspecs_spack 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 b/bootstrap p/profile sorted-profile= lines= v/verbose stacktrace backtrace V/version print-shell-vars=
+set -g __fish_spack_optspecs_spack 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 b/bootstrap p/profile sorted-profile= lines= v/verbose stacktrace t/backtrace V/version print-shell-vars=
 complete -c spack -n '__fish_spack_using_command_pos 0 ' -f -a add -d 'add a spec to an environment'
 complete -c spack -n '__fish_spack_using_command_pos 0 ' -f -a arch -d 'print architecture information about this machine'
 complete -c spack -n '__fish_spack_using_command_pos 0 ' -f -a audit -d 'audit configuration files, packages, etc.'
@@ -473,8 +473,8 @@ complete -c spack -n '__fish_spack_using_command ' -s v -l verbose -f -a verbose
 complete -c spack -n '__fish_spack_using_command ' -s v -l verbose -d 'print additional output during builds'
 complete -c spack -n '__fish_spack_using_command ' -l stacktrace -f -a stacktrace
 complete -c spack -n '__fish_spack_using_command ' -l stacktrace -d 'add stacktraces to all printed statements'
-complete -c spack -n '__fish_spack_using_command ' -l backtrace -f -a backtrace
-complete -c spack -n '__fish_spack_using_command ' -l backtrace -d 'always show backtraces for exceptions'
+complete -c spack -n '__fish_spack_using_command ' -s t -l backtrace -f -a backtrace
+complete -c spack -n '__fish_spack_using_command ' -s t -l backtrace -d 'always show backtraces for exceptions'
 complete -c spack -n '__fish_spack_using_command ' -s V -l version -f -a version
 complete -c spack -n '__fish_spack_using_command ' -s V -l version -d 'show version number and exit'
 complete -c spack -n '__fish_spack_using_command ' -l print-shell-vars -r -f -a print_shell_vars