Diffoscope changed the --exclude-directory-metadata option to require an
argument.

Add a test to validate that diffoscope is functioning as
expected to ensure that future upgrades do not unintentionally break
the reproducibility tests.

[YOCTO #14025]

Signed-off-by: Joshua Watt <[email protected]>
---
 .../oeqa/selftest/cases/diffoscope/A/file.txt |  1 +
 .../oeqa/selftest/cases/diffoscope/B/file.txt |  1 +
 meta/lib/oeqa/selftest/cases/reproducible.py  | 28 ++++++++++++++++++-
 3 files changed, 29 insertions(+), 1 deletion(-)
 create mode 100644 meta/lib/oeqa/selftest/cases/diffoscope/A/file.txt
 create mode 100644 meta/lib/oeqa/selftest/cases/diffoscope/B/file.txt

diff --git a/meta/lib/oeqa/selftest/cases/diffoscope/A/file.txt 
b/meta/lib/oeqa/selftest/cases/diffoscope/A/file.txt
new file mode 100644
index 0000000000..f70f10e4db
--- /dev/null
+++ b/meta/lib/oeqa/selftest/cases/diffoscope/A/file.txt
@@ -0,0 +1 @@
+A
diff --git a/meta/lib/oeqa/selftest/cases/diffoscope/B/file.txt 
b/meta/lib/oeqa/selftest/cases/diffoscope/B/file.txt
new file mode 100644
index 0000000000..223b7836fb
--- /dev/null
+++ b/meta/lib/oeqa/selftest/cases/diffoscope/B/file.txt
@@ -0,0 +1 @@
+B
diff --git a/meta/lib/oeqa/selftest/cases/reproducible.py 
b/meta/lib/oeqa/selftest/cases/reproducible.py
index 5d3959be77..a7ef336143 100644
--- a/meta/lib/oeqa/selftest/cases/reproducible.py
+++ b/meta/lib/oeqa/selftest/cases/reproducible.py
@@ -77,6 +77,32 @@ def compare_file(reference, test, diffutils_sysroot):
     result.status = SAME
     return result
 
+def run_diffoscope(a_dir, b_dir, html_dir, **kwargs):
+    return runCmd(['diffoscope', '--no-default-limits', 
'--exclude-directory-metadata', 'yes', '--html-dir', html_dir, a_dir, b_dir],
+                **kwargs)
+
+class DiffoscopeTests(OESelftestTestCase):
+    diffoscope_test_files = 
os.path.join(os.path.dirname(os.path.abspath(__file__)), "diffoscope")
+
+    def test_diffoscope(self):
+        bitbake("diffoscope-native -c addto_recipe_sysroot")
+        diffoscope_sysroot = get_bb_var("RECIPE_SYSROOT_NATIVE", 
"diffoscope-native")
+
+        # Check that diffoscope doesn't return an error when the files compare
+        # the same (a general check that diffoscope is working)
+        with tempfile.TemporaryDirectory() as tmpdir:
+            run_diffoscope('A', 'A', tmpdir,
+                native_sysroot=diffoscope_sysroot, 
cwd=self.diffoscope_test_files)
+
+        # Check that diffoscope generates an index.html file when the files are
+        # different
+        with tempfile.TemporaryDirectory() as tmpdir:
+            r = run_diffoscope('A', 'B', tmpdir,
+                native_sysroot=diffoscope_sysroot, ignore_status=True, 
cwd=self.diffoscope_test_files)
+
+            self.assertNotEqual(r.status, 0, msg="diffoscope was successful 
when an error was expected")
+            self.assertTrue(os.path.exists(os.path.join(tmpdir, 
'index.html')), "HTML index not found!")
+
 class ReproducibleTests(OESelftestTestCase):
     package_classes = ['deb', 'ipk']
     images = ['core-image-minimal', 'core-image-sato', 
'core-image-full-cmdline']
@@ -232,7 +258,7 @@ class ReproducibleTests(OESelftestTestCase):
                 # Copy jquery to improve the diffoscope output usability
                 self.copy_file(os.path.join(jquery_sysroot, 
'usr/share/javascript/jquery/jquery.min.js'), os.path.join(package_html_dir, 
'jquery.js'))
 
-                runCmd(['diffoscope', '--no-default-limits', 
'--exclude-directory-metadata', '--html-dir', package_html_dir, 
'reproducibleA', 'reproducibleB'],
+                run_diffoscope('reproducibleA', 'reproducibleB', 
package_html_dir,
                         native_sysroot=diffoscope_sysroot, ignore_status=True, 
cwd=package_dir)
 
         if fails:
-- 
2.28.0

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