bitbake: fetch2: Correct handling of replacing the basename in URIs

The solution implementated in commit 96c30007 (fetch2: fix
downloadfilename issue with premirror) missed two corner cases. The
first is if the basename of the original URI also appears somewhere
else in the replacement URI, in which case it would also be replaced.
The second is if the basename of the original URI partially matches
the basename of the replacement URI, in which case the inital part of
the basename from the replacement URI would be left behind.

The second case caused test_npm_premirrors_with_specified_filename to
fail.

The solution is to prefix the basename with a slash when matching to
avoid partial matches, and only replace the basename at the end of the
URI.

This also adds two test cases that test for these problems. Before
this they would give the following errors:

  - ['file:///mirror/example/1.0.0/some-example-1.0.0.tgz;downloadfilename=some-example-1.0.0.tgz']
  + ['file:///mirror/some-example-1.0.0.tgz/1.0.0/some-example-1.0.0.tgz;downloadfilename=some-example-1.0.0.tgz']
  ?                  +++++       ++++++++++

  - ['file:///mirror/some-example-1.0.0.tgz;downloadfilename=some-example-1.0.0.tgz']
  + ['file:///mirror/some-some-example-1.0.0.tgz;downloadfilename=some-example-1.0.0.tgz']
  ?                  +++++

(Bitbake rev: 5924c6f007519cd8ea6cc8b316814d17b43048ca)

Signed-off-by: Peter Kjellerstedt <peter.kjellerstedt@axis.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 7 insertions, 4 deletions

diff --git a/bitbake/lib/bb/fetch2/__init__.py b/bitbake/lib/bb/fetch2/__init__.py
index d37174185a..28a3e54c7f 100644
--- a/bitbake/lib/bb/fetch2/__init__.py
+++ b/bitbake/lib/bb/fetch2/__init__.py
@@ -473,10 +473,13 @@ def uri_replace(ud, uri_find, uri_replace, replacements, d, mirrortarball=None):
                     basename = os.path.basename(ud.localpath)
                 if basename:
                     uri_basename = os.path.basename(uri_decoded[loc])
-                    if uri_basename and basename != uri_basename and result_decoded[loc].endswith(uri_basename):
-                        result_decoded[loc] = result_decoded[loc].replace(uri_basename, basename)
-                    elif not result_decoded[loc].endswith(basename):
-                        result_decoded[loc] = os.path.join(result_decoded[loc], basename)
+                    # Prefix with a slash as a sentinel in case
+                    # result_decoded[loc] does not contain one.
+                    path = "/" + result_decoded[loc]
+                    if uri_basename and basename != uri_basename and path.endswith("/" + uri_basename):
+                        result_decoded[loc] = path[1:-len(uri_basename)] + basename
+                    elif not path.endswith("/" + basename):
+                        result_decoded[loc] = os.path.join(path[1:], basename)
         else:
             return None
     result = encodeurl(result_decoded)