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docs: sphinx-pre-install: don't barf on beta Sphinx releases

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sphinx-pre-install is picky when it comes to parsing sphinx versions; it
failed when run with sphinx 4.0.0b1.  Tweak the regex to tolerate a
trailing "bN" on the version number.

Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Jonathan Corbet 2021-04-15 16:01:50 -06:00
parent f9bbc12ccb
commit e9dfeed251
1 changed files with 1 additions and 1 deletions
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2
scripts/sphinx-pre-install
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@ -259,7 +259,7 @@ sub get_sphinx_version($)
open IN, "$cmd --version 2>&1 |";
while (<IN>) {
if (m/^\s*sphinx-build\s+([\d\.]+)(\+\/[\da-f]+)?$/) {
if (m/^\s*sphinx-build\s+([\d\.]+)((\+\/[\da-f]+)|(b\d+))?$/) {
$ver=$1;
last;
}