[OE-core] [PATCH 4/4] oeqa: reproducible: Run diffoscope on saved output

[Joshua Watt]

If there are differing packages and they are being saved for review,
automatically run diffoscope on them and include the output in the saved
output. The output is currently done in HTML format since these are
typically published on a webpage by the autobuilder.

Signed-off-by: Joshua Watt <JPEWhacker at gmail.com>
---
 meta/lib/oeqa/selftest/cases/reproducible.py | 24 ++++++++++++++------
 1 file changed, 17 insertions(+), 7 deletions(-)

diff --git a/meta/lib/oeqa/selftest/cases/reproducible.py b/meta/lib/oeqa/selftest/cases/reproducible.py
index f6433c9a02b..d3fd8c392b8 100644
--- a/meta/lib/oeqa/selftest/cases/reproducible.py
+++ b/meta/lib/oeqa/selftest/cases/reproducible.py
@@ -1,7 +1,7 @@
 #
 # SPDX-License-Identifier: MIT
 #
-# Copyright 2019 by Garmin Ltd. or its subsidiaries
+# Copyright 2019-2020 by Garmin Ltd. or its subsidiaries
 
 from oeqa.selftest.case import OESelftestTestCase
 from oeqa.utils.commands import runCmd, bitbake, get_bb_var, get_bb_vars
@@ -167,10 +167,16 @@ class ReproducibleTests(OESelftestTestCase):
         return d
 
     def test_reproducible_builds(self):
+        def strip_topdir(s):
+            if s.startswith(self.topdir):
+                return s[len(self.topdir):]
+            return s
+
         # Build native utilities
         self.write_config('')
-        bitbake("diffutils-native -c addto_recipe_sysroot")
+        bitbake("diffoscope-native diffutils-native -c addto_recipe_sysroot")
         diffutils_sysroot = get_bb_var("RECIPE_SYSROOT_NATIVE", "diffutils-native")
+        diffoscope_sysroot = get_bb_var("RECIPE_SYSROOT_NATIVE", "diffoscope-native")
 
         if self.save_results:
             os.makedirs(self.save_results, exist_ok=True)
@@ -206,18 +212,22 @@ class ReproducibleTests(OESelftestTestCase):
 
                 if self.save_results:
                     for d in result.different:
-                        self.copy_file(d.reference, '/'.join([save_dir, d.reference]))
-                        self.copy_file(d.test, '/'.join([save_dir, d.test]))
+                        self.copy_file(d.reference, '/'.join([save_dir, 'packages', strip_topdir(d.reference)]))
+                        self.copy_file(d.test, '/'.join([save_dir, 'packages', strip_topdir(d.test)]))
 
                 if result.missing or result.different:
                     fails.append("The following %s packages are missing or different: %s" %
                             (c, '\n'.join(r.test for r in (result.missing + result.different))))
 
-        if fails:
-            self.fail('\n'.join(fails))
-
         # Clean up empty directories
         if self.save_results:
             if not os.listdir(save_dir):
                 os.rmdir(save_dir)
+            else:
+                self.logger.info('Running diffoscope')
+                runCmd(['diffoscope', '--no-default-limits', '--exclude-directory-metadata', '--html-dir', 'diff-html', 'reproducibleA', 'reproducibleB'],
+                        native_sysroot=diffoscope_sysroot, ignore_status=True, cwd=os.path.join(save_dir, 'packages'))
+
+        if fails:
+            self.fail('\n'.join(fails))
 
-- 
2.23.0