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(parent: 75bcba6) | patch

Add option force_initdb to PostgreSQL::Test::Cluster:init()

Add option force_initdb to PostgreSQL::Test::Cluster:init()

This option is useful to bypass the default behavior of init() which
would create the data folder of a new cluster by copying it from a
template previously initdb'd, if any. Copying the data folder is much
cheaper than running initdb, but some tests may want to force that. For
example, one scenario of pg_combinebackup updated in this commit needs a
different system ID for two nodes.

Previously, this could only be achieved by unsetting
$ENV{'INITDB_TEMPLATE'}, which could become a problem in complex node
setups by making tests less efficient.

Author: Amul Sul
Reviewed-by: Robert Haas, Michael Paquier
Discussion: https://postgr.es/m/Zc1tX9lLonLGu6oH@paquier.xyz

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