Patching should detect patch level

[pitrou]

Currently conda-build only accepts patches applicable with patch -p0. Since modern VCSes (git, mercurial...) by default produce diffs applicable with patch -p1, it would be nice to detect those and accept them too.

[jakirkham]

Believe @mingwandroid fixed this at some point. So this should probably be closed.

[mingwandroid]

Yeah one of my first tasks at anaconda! -p0? What on Earth?

[ltalirz]

Can this be closed?

I guess this is being handled in

conda-build/conda_build/source.py

Lines 514 to 538 in e458431

	def _guess_patch_strip_level(filesstr, src_dir):
	""" Determine the patch strip level automatically. """
	maxlevel = None
	files = {filestr.encode(errors='ignore') for filestr in filesstr}
	src_dir = src_dir.encode(errors='ignore')
	guessed = False
	for file in files:
	numslash = file.count(b'/')
	maxlevel = numslash if maxlevel is None else min(maxlevel, numslash)
	if maxlevel == 0:
	patchlevel = 0
	else:
	histo = {i: 0 for i in range(maxlevel + 1)}
	for file in files:
	parts = file.split(b'/')
	for level in range(maxlevel + 1):
	if os.path.exists(join(src_dir, *parts[-len(parts) + level:])):
	histo[level] += 1
	order = sorted(histo, key=histo.get, reverse=True)
	if histo[order[0]] == histo[order[1]]:
	print("Patch level ambiguous, selecting least deep")
	guessed = True
	patchlevel = min([key for key, value
	in histo.items() if value == histo[order[0]]])
	return patchlevel, guessed

[jakirkham]

I think so. @chenghlee would you be able to close this?

[github-actions]

Hi there, thank you for your contribution!

This issue has been automatically marked as stale because it has not had recent activity. It will be closed automatically if no further activity occurs.

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Thanks!