binman: Support an assumed size for missing binaries

Binman has a the useful feature of handling missing external blobs
gracefully, including allowing them to be missing, deciding whether the
resulting image is functional or not and faking blobs when this is
necessary for particular tools (e.g. mkimage).

This feature is widely used in CI. One drawback is that if U-Boot grows
too large to fit along with the required blobs, then this is not
discovered until someone does a 'real' build which includes the blobs.

Add a 'assume-size' property to entries to allow Binman to reserve a
given size for missing external blobs.

Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 28 insertions, 0 deletions

diff --git a/tools/binman/ftest.py b/tools/binman/ftest.py
index 567849bbab0..e4da04030a5 100644
--- a/tools/binman/ftest.py
+++ b/tools/binman/ftest.py
@@ -7460,5 +7460,33 @@ fdt         fdtmap                Extract the devicetree blob from the fdtmap
         with self.assertRaises(ValueError) as e:
             self._DoReadFile('323_capsule_accept_revert_missing.dts')
 
+    def test_assume_size(self):
+        """Test handling of the assume-size property for external blob"""
+        with self.assertRaises(ValueError) as e:
+            self._DoTestFile('326_assume_size.dts', allow_missing=True,
+                             allow_fake_blobs=True)
+        self.assertIn("contents size 0xa (10) exceeds section size 0x9 (9)",
+                      str(e.exception))
+
+    def test_assume_size_ok(self):
+        """Test handling of the assume-size where it fits OK"""
+        with test_util.capture_sys_output() as (stdout, stderr):
+            self._DoTestFile('327_assume_size_ok.dts', allow_missing=True,
+                             allow_fake_blobs=True)
+        err = stderr.getvalue()
+        self.assertRegex(
+            err,
+            "Image '.*' has faked external blobs and is non-functional: .*")
+
+    def test_assume_size_no_fake(self):
+        """Test handling of the assume-size where it fits OK"""
+        with test_util.capture_sys_output() as (stdout, stderr):
+            self._DoTestFile('327_assume_size_ok.dts', allow_missing=True)
+        err = stderr.getvalue()
+        self.assertRegex(
+            err,
+            "Image '.*' is missing external blobs and is non-functional: .*")
+
+
 if __name__ == "__main__":
     unittest.main()