bitbake: tests/fetch: Add test case to check shallow cloning using `PREMIRRORS`

(Bitbake rev: 6e1434d93d489aa4bab07777a7a9dc58ba0ca5a7)

Signed-off-by: Stefan Koch <stefan-koch@siemens.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/tests/fetch.py

@@ -2237,6 +2237,33 @@ class GitShallowTest(FetcherTest):
             self.fetch_shallow()
         self.assertIn("Unable to find revision v0.0 even from upstream", cm.output[0])
 
+    @skipIfNoNetwork()
+    def test_git_shallow_fetch_premirrors(self):
+        url = "git://git.openembedded.org/bitbake;branch=master;protocol=https"
+
+        # Create a separate premirror directory within tempdir
+        premirror = os.path.join(self.tempdir, "premirror")
+        os.mkdir(premirror)
+
+        # Fetch a non-shallow clone into the premirror subdir
+        self.d.setVar('BB_GIT_SHALLOW', '0')
+        self.d.setVar("DL_DIR", premirror)
+        fetcher, ud = self.fetch(url)
+
+        # Fetch a shallow clone from the premirror subdir with unpacking
+        # using the original recipe URL and the premirror mapping
+        self.d.setVar('BB_GIT_SHALLOW', '1')
+        self.d.setVar("DL_DIR", self.dldir)
+        self.d.setVar('BB_FETCH_PREMIRRORONLY', '1')
+        self.d.setVar('BB_NO_NETWORK', '1')
+        self.d.setVar('BB_GENERATE_MIRROR_TARBALLS', '0')
+        self.d.setVar("PREMIRRORS", "git://.*/.* git://{0};protocol=file".format(premirror + "/git2/" + ud.host + ud.path.replace("/", ".")))
+        fetcher = self.fetch_and_unpack(url)
+
+        # Verify that the unpacked sources are shallow clones
+        self.assertRevCount(1)
+        assert os.path.exists(os.path.join(self.gitdir, '.git', 'shallow'))
+
     @skipIfNoNetwork()
     def test_bitbake(self):
         self.git('remote add --mirror=fetch origin https://github.com/openembedded/bitbake', cwd=self.srcdir)