Add --show-full-compiler option to 'spack find'

When 'spack find' is invoked with the '--show-full-compiler' option,
the compiler flags and version are shown for each spec that is found.

lib/spack/spack/cmd/__init__.py

@@ -211,6 +211,7 @@ def get_arg(name, default=None):
     hashes    = get_arg('long', False)
     namespace = get_arg('namespace', False)
     flags     = get_arg('show_flags', False)
+    full_compiler = get_arg('show_full_compiler', False)
     variants  = get_arg('variants', False)
 
     hlen = 7
@@ -219,7 +220,12 @@ def get_arg(name, default=None):
         hlen = None
 
     nfmt = '.' if namespace else '_'
-    ffmt = '$%+' if flags else ''
+    ffmt = ''
+    if full_compiler or flags:
+        ffmt += '$%'
+        if full_compiler:
+            ffmt += '@'
+        ffmt += '+'
     vfmt = '$+' if variants else ''
     format_string = '$%s$@%s%s' % (nfmt, ffmt, vfmt)
 
@@ -259,7 +265,7 @@ def get_arg(name, default=None):
 
         elif mode == 'short':
             # Print columns of output if not printing flags
-            if not flags:
+            if not flags and not full_compiler:
 
                 def fmt(s):
                     string = ""

lib/spack/spack/cmd/find.py

@@ -60,6 +60,10 @@ def setup_parser(subparser):
                            action='store_true',
                            dest='show_flags',
                            help='show spec compiler flags')
+    subparser.add_argument('--show-full-compiler',
+                           action='store_true',
+                           dest='show_full_compiler',
+                           help='show full compiler specs')
     implicit_explicit = subparser.add_mutually_exclusive_group()
     implicit_explicit.add_argument(
         '-e', '--explicit',