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package.bbclass: Use hard link for package split instead of copy 

When doing package split, we use hard link instead of copy, which can
save about 10% disk space when building poky-image-minimal.

If fail, it will fall back to the copyfile function.

[Updated by Richard to use os.link and avoid an exec() call per file]

Signed-off-by: Dongxiao Xu <dongxiao.xu@intel.com>
This commit is contained in:
Dongxiao Xu 2010-12-06 20:26:08 +08:00 committed by Richard Purdie
parent aba80f536f
commit 0d0279a881
1 changed files with 3 additions and 12 deletions
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15
meta/classes/package.bbclass
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@ -427,22 +427,13 @@ python populate_packages () {
fpath = os.path.join(root,file)
dpath = os.path.dirname(fpath)
bb.mkdirhier(dpath)
# Check if this is a hardlink to something... if it is
# attempt to preserve the link information, instead of copy.
if not os.path.islink(file):
s = os.stat(file)
if s.st_nlink > 1:
file_reference = "%d_%d" % (s.st_dev, s.st_ino)
if file_reference not in file_links:
# Save the reference for next time...
file_links[file_reference] = fpath
else:
os.link(file_links[file_reference], fpath)
continue
os.link(file, fpath)
continue
ret = bb.copyfile(file, fpath)
if ret is False or ret == 0:
raise bb.build.FuncFailed("File population failed")
del localdata
os.chdir(workdir)