oelint.vars.downloadfilename

severity: warning

Example

In my-recipe_1.0.bb

SRC_URI += "http://foo.bar/baz.jpg"

Why is this bad?

As the download directory is shared across all builds all artifacts need to be properly versioned. This makes sure that updates and rebuilds are detected.

One example is that with version 1.0 of the recipe we would download baz.jpg with a checksum A. Now we do an upgrade to version 1.1 of the recipe leading to checksum B.

If we now would try to go back to version 1.0 the artifact in the download directory would have been overwritten to version 1.1, causing a checksum error while building 1.0 again.

Ways to fix it

Add a downloadfilename including PV or the hardcoded recipe version

SRC_URI += "http://foo.bar/baz.jpg;downloadfilename=something.dat.${PV}"