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bitbake: fetch2: extract the function which ensures that a valid symlink exists

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For better readability and future use, we extract the function which
ensures that a given symlink exists.

(Bitbake rev: 5e69ca56533666a097bb23d09ab673e5c862051c)

Signed-off-by: Urs Fässler <urs.fassler@bbv.ch>
Signed-off-by: Pascal Bach <pascal.bach@siemens.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Urs Fässler
2018-10-15 13:43:21 +00:00
committed by Richard Purdie
parent 9a058e4421
commit 49f25eceeb
1 changed files with 17 additions and 10 deletions
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27
bitbake/lib/bb/fetch2/__init__.py
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@@ -1018,16 +1018,7 @@ def try_mirror_url(fetch, origud, ud, ld, check = False):
origud.method.build_mirror_data(origud, ld)
return origud.localpath
# Otherwise the result is a local file:// and we symlink to it
if not os.path.exists(origud.localpath):
if os.path.islink(origud.localpath):
# Broken symbolic link
os.unlink(origud.localpath)
# As per above, in case two tasks end up here simultaneously.
try:
os.symlink(ud.localpath, origud.localpath)
except FileExistsError:
pass
ensure_symlink(ud.localpath, origud.localpath)
update_stamp(origud, ld)
return ud.localpath
@@ -1061,6 +1052,22 @@ def try_mirror_url(fetch, origud, ud, ld, check = False):
bb.utils.unlockfile(lf)
def ensure_symlink(target, link_name):
if not os.path.exists(link_name):
if os.path.islink(link_name):
# Broken symbolic link
os.unlink(link_name)
# In case this is executing without any file locks held (as is
# the case for file:// URLs), two tasks may end up here at the
# same time, in which case we do not want the second task to
# fail when the link has already been created by the first task.
try:
os.symlink(target, link_name)
except FileExistsError:
pass
def try_mirrors(fetch, d, origud, mirrors, check = False):
"""
Try to use a mirrored version of the sources.