#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0+
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#
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# Figure out if we should follow a specific parallelism from the make
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# environment (as exported by scripts/jobserver-exec), or fall back to
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# the "auto" parallelism when "-jN" is not specified at the top-level
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# "make" invocation.
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sphinx="$1"
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shift || true
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parallel="$PARALLELISM"
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if [ -z "$parallel" ] ; then
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# If no parallelism is specified at the top-level make, then
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# fall back to the expected "-jauto" mode that the "htmldocs"
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# target has had.
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auto=$(perl -e 'open IN,"'"$sphinx"' --version 2>&1 |";
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while (<IN>) {
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if (m/([\d\.]+)/) {
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print "auto" if ($1 >= "1.7")
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}
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}
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close IN')
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if [ -n "$auto" ] ; then
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parallel="$auto"
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fi
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fi
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# Only if some parallelism has been determined do we add the -jN option.
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if [ -n "$parallel" ] ; then
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parallel="-j$parallel"
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fi
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exec "$sphinx" $parallel "$@"
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