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-rw-r--r--lib/spack/spack/cmd/install.py10
1 files changed, 8 insertions, 2 deletions
diff --git a/lib/spack/spack/cmd/install.py b/lib/spack/spack/cmd/install.py
index 26e77b474a..6321063279 100644
--- a/lib/spack/spack/cmd/install.py
+++ b/lib/spack/spack/cmd/install.py
@@ -74,9 +74,15 @@ the dependencies"""
subparser.add_argument(
'--dont-restage', action='store_true',
help="if a partial install is detected, don't delete prior state")
- subparser.add_argument(
- '--no-cache', action='store_false', dest='use_cache',
+
+ cache_group = subparser.add_mutually_exclusive_group()
+ cache_group.add_argument(
+ '--use-cache', action='store_true', dest='use_cache',
help="check for pre-built Spack packages in mirrors")
+ cache_group.add_argument(
+ '--no-cache', action='store_false', dest='use_cache',
+ help="do not check for pre-built Spack packages in mirrors")
+
subparser.add_argument(
'--show-log-on-error', action='store_true',
help="print full build log to stderr if build fails")