use source toolchain version when passing only --try-toolchain

easybuild/tools/options.py

@@ -1735,11 +1735,13 @@ def process_software_build_specs(options):
             })
 
     # provide both toolchain and toolchain_name/toolchain_version keys
-    if 'toolchain_name' in build_specs:
+    try:
         build_specs['toolchain'] = {
             'name': build_specs['toolchain_name'],
-            'version': build_specs.get('toolchain_version', None),
+            'version': build_specs['toolchain_version'],
         }
+    except KeyError:
+        pass  # Don't set toolchain key if we don't have both keys
 
     # process --amend and --try-amend
     if options.amend or options.try_amend:

test/framework/easyconfigs/test_ecs/i/iimpi/iimpi-2018a.eb

@@ -0,0 +1,20 @@
+# This is an easyconfig file for EasyBuild, see http://easybuilders.github.io/easybuild
+easyblock = 'Toolchain'
+
+name = 'iimpi'
+version = '2018a'
+
+homepage = 'https://software.intel.com/parallel-studio-xe'
+description = """Intel C/C++ and Fortran compilers, alongside Intel MPI."""
+
+toolchain = SYSTEM
+
+local_compver = '2016.1.150'
+local_suff = '-GCC-4.9.3-2.25'
+dependencies = [
+    ('icc', local_compver, local_suff),
+    ('ifort', local_compver, local_suff),
+    ('impi', '5.1.2.150', '', ('iccifort', '%s%s' % (local_compver, local_suff))),
+]
+
+moduleclass = 'toolchain'

test/framework/easyconfigs/test_ecs/i/intel/intel-2018a.eb

@@ -8,14 +8,17 @@ description = """Intel Cluster Toolkit Compiler Edition provides Intel C/C++ and
 
 toolchain = SYSTEM
 
+local_compver = '2016.1.150'
+local_gccver = '4.9.3'
+local_binutilsver = '2.25'
+local_gccsuff = '-GCC-%s-%s' % (local_gccver, local_binutilsver)
 # fake intel toolchain easyconfig, no dependencies (good enough for testing)
 local_fake_dependencies = [
-    ('GCCcore', '6.4.0'),
-    ('binutils', '2.28', '-GCCcore-6.4.0'),
-    ('icc', '2018.1.163', '-GCCcore-6.4.0'),
-    ('ifort', '2018.1.163', '-GCCcore-6.4.0'),
-    ('impi', '2018.1.163', '', ('iccifort', '2018.1.163-GCCcore-6.4.0')),
-    ('imkl', '2018.1.163', '', ('iimpi', version)),
+    ('GCCcore', local_gccver),
+    ('binutils', local_binutilsver, '-GCCcore-%s' % local_gccver),
+    ('icc', local_compver, local_gccsuff),
+    ('ifort', local_compver, local_gccsuff),
+    ('impi', '5.1.2.150', '', ('iccifort', '%s%s' % (local_compver, local_gccsuff))),
 ]
 
 moduleclass = 'toolchain'

test/framework/filetools.py

@@ -2401,7 +2401,7 @@ def test_index_functions(self):
         # test with specified path with and without trailing '/'s
         for path in [test_ecs, test_ecs + '/', test_ecs + '//']:
             index = ft.create_index(path)
-            self.assertEqual(len(index), 91)
+            self.assertEqual(len(index), 92)
 
             expected = [
                 os.path.join('b', 'bzip2', 'bzip2-1.0.6-GCC-4.9.2.eb'),

test/framework/options.py

@@ -2420,6 +2420,22 @@ def test_try(self):
         allargs = args + ['--software-version=1.2.3', '--toolchain=gompi,2018a']
         self.assertErrorRegex(EasyBuildError, "version .* not available", self.eb_main, allargs, raise_error=True)
 
+        # Try changing only name or version of toolchain
+        args.pop(0)  # Remove EC filename
+        foss_toy_ec = os.path.join(self.test_buildpath, 'toy-0.0-foss-2018a.eb')
+        copy_file(os.path.join(ecs_path, 't', 'toy', 'toy-0.0-gompi-2018a.eb'), foss_toy_ec)
+        write_file(foss_toy_ec, "toolchain['name'] = 'foss'", append=True)
+
+        test_cases = [
+            (['toy-0.0-gompi-2018a.eb', '--try-toolchain-name=intel'], 'toy/0.0-iimpi-2018a'),
+            ([foss_toy_ec, '--try-toolchain-name=intel'], 'toy/0.0-intel-2018a'),
+            (['toy-0.0-gompi-2018a.eb', '--try-toolchain-version=2018b'], 'toy/0.0-gompi-2018b'),
+        ]
+        for extra_args, mod in test_cases:
+            outtxt = self.eb_main(args + extra_args, verbose=True, raise_error=True)
+            mod_regex = re.compile(r"\(module: %s\)$" % mod, re.M)
+            self.assertTrue(mod_regex.search(outtxt), "Pattern %s found in %s" % (mod_regex.pattern, outtxt))
+
     def test_try_with_copy(self):
         """Test whether --try options are taken into account."""
         ecs_path = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'easyconfigs', 'test_ecs')