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bitbake/fetch2: Ensure that mirror fetches are symlinked from the download directory

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When files are fetched from a mirror source that happens to be local,
ensure links are created for the file since subsequent fetch calls
can then follow the links to find files.

Any other approach such as the existing manipulations of localpath
internally to the fetcher are prone to errors, races and other issues.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Richard Purdie
2011-02-03 18:22:06 +00:00
parent 7f99605562
commit fa9fda05e1
1 changed files with 17 additions and 3 deletions
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20
bitbake/lib/bb/fetch2/__init__.py
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@@ -263,6 +263,15 @@ def subprocess_setup():
# SIGPIPE errors are known issues with gzip/bash
signal.signal(signal.SIGPIPE, signal.SIG_DFL)
def download_update(result, target):
if os.path.exists(target):
return
if not result or not os.path.exists(result):
return
if target != result:
os.symlink(result, target)
return
def download(d, urls = None):
"""
Fetch all urls
@@ -289,6 +298,8 @@ def download(d, urls = None):
elif os.path.exists(ud.localfile):
localpath = ud.localfile
download_update(localpath, ud.localpath)
# Need to re-test forcefetch() which will return true if our copy is too old
if m.forcefetch(u, ud, d) or not localpath:
# Next try fetching from the original uri, u
@@ -297,16 +308,19 @@ def download(d, urls = None):
if hasattr(m, "build_mirror_data"):
m.build_mirror_data(u, ud, d)
localpath = ud.localpath
download_update(localpath, ud.localpath)
except FetchError:
# Remove any incomplete file
bb.utils.remove(ud.localpath)
# Finally, try fetching uri, u, from MIRRORS
mirrors = mirror_from_string(bb.data.getVar('MIRRORS', d, True))
localpath = try_mirrors (d, u, mirrors)
if not localpath or not os.path.exists(localpath):
raise FetchError("Unable to fetch URL %s from any source." % u)
ud.localpath = localpath
if not localpath or not os.path.exists(localpath):
raise FetchError("Unable to fetch URL %s from any source." % u)
download_update(localpath, ud.localpath)
if os.path.exists(ud.md5):
# Touch the md5 file to show active use of the download