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oe.path: Add copyhardlink() helper function

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This function creates hard links if possible, falling back to copying
the file if the destination is on a different volume to the source.

The docstring for copyhardlinktree() is also updated to make the
difference between the two functions a little clearer.

(From OE-Core rev: 5437efa16f9bec914e417c6c939a39c247084f52)

Signed-off-by: Paul Barker <paul@betafive.co.uk>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Paul Barker 2019-05-03 11:54:47 +00:00 committed by Richard Purdie
parent 80bb16ee71
commit 10a14af4ca
1 changed files with 12 additions and 1 deletions
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13
meta/lib/oe/path.py
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@ -90,7 +90,7 @@ def copytree(src, dst):
subprocess.check_output(cmd, shell=True, stderr=subprocess.STDOUT)
def copyhardlinktree(src, dst):
""" Make the hard link when possible, otherwise copy. """
"""Make a tree of hard links when possible, otherwise copy."""
bb.utils.mkdirhier(dst)
if os.path.isdir(src) and not len(os.listdir(src)):
return
@ -114,6 +114,17 @@ def copyhardlinktree(src, dst):
else:
copytree(src, dst)
def copyhardlink(src, dst):
"""Make a hard link when possible, otherwise copy."""
# We need to stat the destination directory as the destination file probably
# doesn't exist yet.
dstdir = os.path.dirname(dst)
if os.stat(src).st_dev == os.stat(dstdir).st_dev:
os.link(src, dst)
else:
shutil.copy(src, dst)
def remove(path, recurse=True):
"""
Equivalent to rm -f or rm -rf