mirror of
https://github.com/git/git.git
synced 2024-11-16 22:14:53 +01:00
750bd6ac35
This script was originally posted on the git mailing list by Randal L. Schwartz <merlyn@stonehenge.com>. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
26 lines
708 B
Bash
Executable file
26 lines
708 B
Bash
Executable file
#!/bin/sh
|
|
|
|
# This script displays the distribution of longest common hash prefixes.
|
|
# This can be used to determine the minimum prefix length to use
|
|
# for object names to be unique.
|
|
|
|
git rev-list --objects --all | sort | perl -lne '
|
|
substr($_, 40) = "";
|
|
# uncomment next line for a distribution of bits instead of hex chars
|
|
# $_ = unpack("B*",pack("H*",$_));
|
|
if (defined $p) {
|
|
($p ^ $_) =~ /^(\0*)/;
|
|
$common = length $1;
|
|
if (defined $pcommon) {
|
|
$count[$pcommon > $common ? $pcommon : $common]++;
|
|
} else {
|
|
$count[$common]++; # first item
|
|
}
|
|
}
|
|
$p = $_;
|
|
$pcommon = $common;
|
|
END {
|
|
$count[$common]++; # last item
|
|
print "$_: $count[$_]" for 0..$#count;
|
|
}
|
|
'
|