abicheck: Add mechanism to disable abicheck of files

abidw may fail on some files causing build to fail. This is not
acceptable in CI. Adding mechanism to allow suppression of separate
files.

Signed-off-by: Pavel Zhukov <pavel.zhukov@huawei.com>

README.md

@@ -21,6 +21,10 @@ The ABI check can be activated by appending the `abicheck` bbclass to the bbclas
 
 The tool used for the ABI info serialization is [abidw](https://sourceware.org/libabigail/manual/abidw.html).
 
+If order to skip serialization of the file modify "BINARY_AUDIT_SUPPRESSED_FILES" variable to be the filepath of that file:
+
+`BINARY_AUDIT_SUPPRESSED_FILES:[pn-package_name]:append = " relative/path/to/D/path/to/file " `
+
 ## ABI compatibility
 
 The serialized ABI representation will be integrated into the build history. Saving the build history will allow to compare the current build

classes/abicheck.bbclass

@@ -35,17 +35,21 @@ def binary_audit_gather_abixml(d):
     kv = d.getVar("KERNEL_VERSION")
     artifact_dir = d.getVar("IMG_DIR")
     ltree = os.path.join(artifact_dir, "usr", "lib", "modules")
+    suppressed_files = d.getVar("BINARY_AUDIT_SUPPRESSED_FILES")
+    topdir = d.getVar("D")
+    if suppressed_files is not None:
+        suppressed_files = [os.path.join(topdir, f.strip()) for f in suppressed_files.split(" ")]
     if kv and os.path.isdir(ltree):
         # XXX This vmlinux lookup method is very vague
         ptr = os.path.join(d.getVar("WORKDIR"), "..", "..", d.getVar("PREFERRED_PROVIDER_virtual/kernel"), "*", "*", "vmlinux")
         vmlinux = glob.glob(ptr)[0]
         whitelist = None
-        out, out_fn = abicheck.serialize_kernel_artifacts(abixml_dir, ltree, vmlinux, whitelist)
+        out, out_fn = abicheck.serialize_kernel_artifacts(abixml_dir, ltree, vmlinux, whitelist, suppressed_files)
         with open(out_fn, "w") as f:
             f.write(out)
             f.close()
     else:
-        for out, out_fn in abicheck.serialize_artifacts(abixml_dir, artifact_dir):
+        for out, out_fn in abicheck.serialize_artifacts(abixml_dir, artifact_dir, suppressed_files):
             with open(out_fn, "w") as f:
                 f.write(out)
                 f.close()

lib/binaryaudit/abicheck.py

@@ -86,13 +86,15 @@ def compare(ref, cur, suppr=[]):
     return process.returncode, out, cmd
 
 
-def serialize_artifacts(adir, id):
+def serialize_artifacts(adir, id, suppressed_files = None):
     ''' Recursively serialize binary artifacts starting at the given image directory(id), yields serialized output and filename
     Parameters:
         adir (str): path to abixml directory
         id (str): image directory- result of calling d.getVar("IMG_DIR")
     '''
     for fn in glob.iglob(id + "/**/**", recursive=True):
+        if suppressed_files is not None and fn in suppressed_files:
+            continue
         if os.path.isfile(fn) and not os.path.islink(fn):
             is_elf_artifact = False
             try: