Initialize report generator before parsing specs

This will allow us to generate reports for concretization errors

lib/spack/spack/cmd/install.py

@@ -191,6 +191,10 @@ def install(parser, args, **kwargs):
         tty.warn("Deprecated option: --run-tests: use --test=all instead")
 
     # 1. Abstract specs from cli
+    reporter = spack.report.collect_info(args.log_format)
+    if args.log_file:
+        reporter.filename = args.log_file
+
     specs = spack.cmd.parse_specs(args.package)
     if args.test == 'all' or args.run_tests:
         spack.package_testing.test_all()
@@ -216,8 +220,10 @@ def install(parser, args, **kwargs):
     if len(specs) == 0:
         tty.die('The `spack install` command requires a spec to install.')
 
-    filename = args.log_file or default_log_file(specs[0])
-    with spack.report.collect_info(specs, args.log_format, filename):
+    if not args.log_file:
+        reporter.filename = default_log_file(specs[0])
+    reporter.specs = specs
+    with reporter:
         if args.overwrite:
             # If we asked to overwrite an existing spec we must ensure that:
             # 1. We have only one spec

lib/spack/spack/report.py

@@ -249,20 +249,17 @@ class collect_info(object):
     Raises:
         ValueError: when ``format_name`` is not in ``valid_formats``
     """
-    def __init__(self, specs, format_name, filename):
-        self.specs = specs
+    def __init__(self, format_name):
         self.format_name = format_name
 
         # Check that the format is valid
         if format_name not in itertools.chain(valid_formats, [None]):
             raise ValueError('invalid report type: {0}'.format(format_name))
 
-        self.filename = filename
-        self.collector = InfoCollector(specs) if self.format_name else None
-
     def __enter__(self):
         if self.format_name:
             # Start the collector and patch PackageBase.do_install
+            self.collector = InfoCollector(self.specs)
             self.collector.__enter__()
 
     def __exit__(self, exc_type, exc_val, exc_tb):