bitbake: fetch2: Add striplevel support to unpack

Add a parameter `striplevel` to the SRC_URI to strip NUMBER leading
components (levels) from file names on extraction.

For example, if the archive `archive.tar.gz` contains `some/file`,
the SRC_URI `https://.../archive.tar.gz;subdir=other;striplevel=1`
will extract `some/file` to `other/file`.

This is useful to extract archives to a specified directory instead of
the original root component of the archive. The feature is required for
the npm support. The npm package contents should reside in a subfolder
inside a npm archive (usually it is called package/). npm strips one
directory layer when installing the package.

(Bitbake rev: aa4926e5d9c92f33b4434e2da709ff0bf3049f5b)

Signed-off-by: Stefan Herbrechtsmeier <stefan.herbrechtsmeier@weidmueller.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/bitbake/lib/bb/fetch2/__init__.py b/bitbake/lib/bb/fetch2/__init__.py
index b0d5508d06..0b39ea6aaa 100644
--- a/bitbake/lib/bb/fetch2/__init__.py
+++ b/bitbake/lib/bb/fetch2/__init__.py
@@ -1459,6 +1459,8 @@ class FetchMethod(object):
 
         if unpack:
             tar_cmd = 'tar --extract --no-same-owner'
+            if 'striplevel' in urldata.parm:
+                tar_cmd += ' --strip-components=%s' %  urldata.parm['striplevel']
             if file.endswith('.tar'):
                 cmd = '%s -f %s' % (tar_cmd, file)
             elif file.endswith('.tgz') or file.endswith('.tar.gz') or file.endswith('.tar.Z'):