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Add speedup_options cache #857

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Add speedup_options cache #857

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11 changes: 10 additions & 1 deletion alibuild_helpers/git.py
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Original file line number Diff line number Diff line change
Expand Up @@ -13,12 +13,21 @@
}
"""Customised timeout for some commands."""

# Don't recalculate this every time we need it.
_clone_speedup_cache = None
def clone_speedup_options():
"""Return a list of options supported by the system git which speed up cloning."""
for filter_option in ("--filter=tree:0", "--filter=blob:none"):
valid_options = ("--filter=tree:0", "--filter=blob:none")
global _clone_speedup_cache
if _clone_speedup_cache is not None:
return _clone_speedup_cache
for filter_option in valid_options:
_, out = getstatusoutput("LANG=C git clone " + filter_option)
if "unknown option" not in out and "invalid filter-spec" not in out:
_clone_speedup_cache = [filter_option]
return [filter_option]
debug("Git: no speedup_options filters supported. Tried using (%s)", ", ".join(valid_options))
_clone_speedup_cache = []
return []


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