Add elfread #1685

Signed-off-by: Li <[email protected]>

Author: Li

plugins/scancode-lkmclue/README.md

@@ -3,7 +3,8 @@ A ScanCode scan plugin to find lkmclue source info.
 To start the test case, please run:
 1. ./configure
 2. source bin/activate
-3. pip install -e plugins/scancode-ctags-manylinux1_x86_64 -e plugins/scancode-lkmclue
+3. pip install -e plugins/scancode-ctags-manylinux1_x86_64 -e plugins/scancode-readelf-manylinux1_x86_64 -e plugins/scancode-lkmclue
 4. pytest -vvs plugins/scancode-lkmclue/tests/test_lkmclue.py
+   pytest -vvs plugins/scancode-lkmclue/tests/test_elf.py
 
 Note that in step3, the path depends on your OS versions, please update according to your real os enviroment.

plugins/scancode-lkmclue/setup.py

@@ -49,6 +49,8 @@
     entry_points={
         'scancode_scan': [
             'scancode-lkmclue = lkmclue:LKMClueScanner',
+            'scancode-elf = elf:ELFScanner',
+
         ],
     }
 

plugins/scancode-lkmclue/src/elf/__init__.py

@@ -0,0 +1,79 @@
+#
+# Copyright (c) 2019 nexB Inc. and others. All rights reserved.
+# http://nexb.com and https://github.com/nexB/scancode-toolkit/
+# The ScanCode software is licensed under the Apache License version 2.0.
+# Data generated with ScanCode require an acknowledgment.
+# ScanCode is a trademark of nexB Inc.
+#
+# You may not use this software except in compliance with the License.
+# You may obtain a copy of the License at: http://apache.org/licenses/LICENSE-2.0
+# Unless required by applicable law or agreed to in writing, software distributed
+# under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+# CONDITIONS OF ANY KIND, either express or implied. See the License for the
+# specific language governing permissions and limitations under the License.
+#
+# When you publish or redistribute any data created with ScanCode or any ScanCode
+# derivative work, you must accompany this data with the following acknowledgment:
+#
+#  Generated with ScanCode and provided on an "AS IS" BASIS, WITHOUT WARRANTIES
+#  OR CONDITIONS OF ANY KIND, either express or implied. No content created from
+#  ScanCode should be considered or used as legal advice. Consult an Attorney
+#  for any legal advice.
+#  ScanCode is a free software code scanning tool from nexB Inc. and others.
+#  Visit https://github.com/nexB/scancode-toolkit/ for support and download.
+
+from __future__ import absolute_import
+from __future__ import unicode_literals
+
+from collections import OrderedDict
+from functools import partial
+from itertools import chain
+
+import attr
+
+from commoncode import fileutils
+from plugincode.scan import ScanPlugin
+from plugincode.scan import scan_impl
+from scancode import CommandLineOption
+from scancode import SCAN_GROUP
+from typecode import contenttype
+from elf.elf import Elf
+
+
+@scan_impl
+class ELFScanner(ScanPlugin):
+    """
+    Collect the names of shared objects/libraries needed by an Elf binary file.
+    """
+    resource_attributes = OrderedDict(
+        elf_needed_library=attr.ib(default=attr.Factory(list), repr=False),
+    )
+
+    options = [
+        CommandLineOption(('--elf',),
+            is_flag=True, default=False,
+            help=' Collect the names of shared objects/libraries needed by an Elf binary file.',
+            help_group=SCAN_GROUP,
+            sort_order=100),
+    ]
+
+    def is_enabled(self, elf, **kwargs):
+        return elf
+
+    def get_scanner(self, **kwargs):
+        return get_elf_needed_library
+
+
+def get_elf_needed_library(location, **kwargs):
+    """
+    Return a list of needed_libraries 
+    """
+    
+    T = contenttype.get_type(location)
+    if not T.is_elf:
+        return
+    elfie = elf.Elf(location)
+    results =[]
+    for needed_library in  elfie.needed_libraries:
+        results.append(needed_library)
+    return dict(elf_needed_library=results)