Package.do_install : removed install_self from arguments (#1956)

* Removes the extra argument from Package.do_install while maintaining the changes in behavior pulled in #1603

* install : removed -i and -d shorthands (breaks backward compatibility)

* Change ':' to ','

lib/spack/spack/cmd/install.py

@@ -35,12 +35,15 @@
 
 def setup_parser(subparser):
     subparser.add_argument(
-        '-i', '--ignore-dependencies', action='store_true', dest='ignore_deps',
-        help="Do not try to install dependencies of requested packages.")
-    subparser.add_argument(
-        '-d', '--dependencies-only', action='store_true', dest='deps_only',
-        help='Install dependencies of this package, ' +
-        'but not the package itself.')
+        '--only',
+        default='package,dependencies',
+        dest='things_to_install',
+        choices=['package', 'dependencies', 'package,dependencies'],
+        help="""Select the mode of installation.
+The default is to install the package along with all its dependencies.
+Alternatively one can decide to install only the package or only
+the dependencies."""
+    )
     subparser.add_argument(
         '-j', '--jobs', action='store', type=int,
         help="Explicitly set number of make jobs.  Default is #cpus.")
@@ -63,15 +66,17 @@ def setup_parser(subparser):
         '--dirty', action='store_true', dest='dirty',
         help="Install a package *without* cleaning the environment.")
     subparser.add_argument(
-        'packages', nargs=argparse.REMAINDER,
-        help="specs of packages to install")
+        'package',
+        nargs=argparse.REMAINDER,
+        help="spec of the package to install"
+    )
     subparser.add_argument(
         '--run-tests', action='store_true', dest='run_tests',
         help="Run tests during installation of a package.")
 
 
 def install(parser, args):
-    if not args.packages:
+    if not args.package:
         tty.die("install requires at least one package argument")
 
     if args.jobs is not None:
@@ -81,17 +86,33 @@ def install(parser, args):
     if args.no_checksum:
         spack.do_checksum = False        # TODO: remove this global.
 
-    specs = spack.cmd.parse_specs(args.packages, concretize=True)
-    for spec in specs:
+    # Parse cli arguments and construct a dictionary
+    # that will be passed to Package.do_install API
+    kwargs = {
+        'keep_prefix': args.keep_prefix,
+        'keep_stage': args.keep_stage,
+        'install_deps': 'dependencies' in args.things_to_install,
+        'make_jobs': args.jobs,
+        'run_tests': args.run_tests,
+        'verbose': args.verbose,
+        'fake': args.fake,
+        'dirty': args.dirty
+    }
+
+    # Spec from cli
+    specs = spack.cmd.parse_specs(args.package, concretize=True)
+    if len(specs) != 1:
+        tty.error('only one spec can be installed at a time.')
+    spec = specs.pop()
+
+    if args.things_to_install == 'dependencies':
+        # Install dependencies as-if they were installed
+        # for root (explicit=False in the DB)
+        kwargs['explicit'] = False
+        for s in spec.dependencies():
+            p = spack.repo.get(s)
+            p.do_install(**kwargs)
+    else:
         package = spack.repo.get(spec)
-        package.do_install(
-            keep_prefix=args.keep_prefix,
-            keep_stage=args.keep_stage,
-            install_deps=not args.ignore_deps,
-            install_self=not args.deps_only,
-            make_jobs=args.jobs,
-            run_tests=args.run_tests,
-            verbose=args.verbose,
-            fake=args.fake,
-            dirty=args.dirty,
-            explicit=True)
+        kwargs['explicit'] = True
+        package.do_install(**kwargs)

lib/spack/spack/cmd/setup.py

@@ -92,7 +92,6 @@ def setup(self, args):
         package.do_install(
             keep_prefix=True,  # Don't remove install directory
             install_deps=not args.ignore_deps,
-            install_self=True,
             verbose=args.verbose,
             keep_stage=True,   # don't remove source dir for SETUP.
             install_phases=set(['setup', 'provenance']),

lib/spack/spack/cmd/test_install.py

@@ -181,7 +181,6 @@ def install_single_spec(spec, number_of_jobs):
         package.do_install(keep_prefix=False,
                            keep_stage=True,
                            install_deps=True,
-                           install_self=True,
                            make_jobs=number_of_jobs,
                            verbose=True,
                            fake=False)

lib/spack/spack/package.py

@@ -952,8 +952,6 @@ def do_install(self,
             even with exceptions.
         :param install_deps: Install dependencies before installing this \
             package
-        :param install_self: Install this package once dependencies have \
-            been installed.
         :param fake: Don't really build; install fake stub files instead.
         :param skip_patch: Skip patch stage of build if True.
         :param verbose: Display verbose build output (by default, suppresses \
@@ -998,7 +996,6 @@ def do_install(self,
                     keep_prefix=keep_prefix,
                     keep_stage=keep_stage,
                     install_deps=install_deps,
-                    install_self=True,
                     fake=fake,
                     skip_patch=skip_patch,
                     verbose=verbose,
@@ -1006,11 +1003,6 @@ def do_install(self,
                     run_tests=run_tests,
                     dirty=dirty)
 
-        # The rest of this function is to install ourself,
-        # once deps have been installed.
-        if not install_self:
-            return
-
         # Set run_tests flag before starting build.
         self.run_tests = run_tests